D-A type dicyanoethylenes modified by carbazole: Obvious aggregation-induced emission enhancement and high-contrast mechanofluorochromism
Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 e...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Feng, Xiucun [verfasserIn] |
|---|
| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Schlagwörter: |
Aggregation-induced emission enhancement |
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| Übergeordnetes Werk: |
Enthalten in: New ablation evolution behaviors in micro-hole drilling of 2.5D C - Liu, Chang ELSEVIER, 2021, New York, NY [u.a.] |
|---|---|
| Übergeordnetes Werk: |
volume:252 ; year:2022 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.jlumin.2022.119323 |
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ELV059441291 |
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| 245 | 1 | 0 | |a D-A type dicyanoethylenes modified by carbazole: Obvious aggregation-induced emission enhancement and high-contrast mechanofluorochromism |
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| 520 | |a Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. | ||
| 520 | |a Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. | ||
| 650 | 7 | |a Aggregation-induced emission enhancement |2 Elsevier | |
| 650 | 7 | |a Intramolecular charge-transfer |2 Elsevier | |
| 650 | 7 | |a dicyanoethylene |2 Elsevier | |
| 650 | 7 | |a Carbazole |2 Elsevier | |
| 650 | 7 | |a Mechanofluorochromism |2 Elsevier | |
| 700 | 1 | |a Zhou, Ningning |4 oth | |
| 700 | 1 | |a Zhou, Juanfang |4 oth | |
| 700 | 1 | |a Zhang, Weidong |4 oth | |
| 700 | 1 | |a Liu, Xingliang |4 oth | |
| 700 | 1 | |a Xu, Defang |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier |a Liu, Chang ELSEVIER |t New ablation evolution behaviors in micro-hole drilling of 2.5D C |d 2021 |g New York, NY [u.a.] |w (DE-627)ELV00662605X |
| 773 | 1 | 8 | |g volume:252 |g year:2022 |g pages:0 |
| 856 | 4 | 0 | |u https://doi.org/10.1016/j.jlumin.2022.119323 |3 Volltext |
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10.1016/j.jlumin.2022.119323 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV059441291 (ELSEVIER)S0022-2313(22)00598-1 DE-627 ger DE-627 rakwb eng 670 VZ 51.60 bkl 58.45 bkl Feng, Xiucun verfasserin aut D-A type dicyanoethylenes modified by carbazole: Obvious aggregation-induced emission enhancement and high-contrast mechanofluorochromism 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Aggregation-induced emission enhancement Elsevier Intramolecular charge-transfer Elsevier dicyanoethylene Elsevier Carbazole Elsevier Mechanofluorochromism Elsevier Zhou, Ningning oth Zhou, Juanfang oth Zhang, Weidong oth Liu, Xingliang oth Xu, Defang oth Enthalten in Elsevier Liu, Chang ELSEVIER New ablation evolution behaviors in micro-hole drilling of 2.5D C 2021 New York, NY [u.a.] (DE-627)ELV00662605X volume:252 year:2022 pages:0 https://doi.org/10.1016/j.jlumin.2022.119323 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 51.60 Keramische Werkstoffe Hartstoffe Werkstoffkunde VZ 58.45 Gesteinshüttenkunde VZ AR 252 2022 0 |
| spelling |
10.1016/j.jlumin.2022.119323 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV059441291 (ELSEVIER)S0022-2313(22)00598-1 DE-627 ger DE-627 rakwb eng 670 VZ 51.60 bkl 58.45 bkl Feng, Xiucun verfasserin aut D-A type dicyanoethylenes modified by carbazole: Obvious aggregation-induced emission enhancement and high-contrast mechanofluorochromism 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Aggregation-induced emission enhancement Elsevier Intramolecular charge-transfer Elsevier dicyanoethylene Elsevier Carbazole Elsevier Mechanofluorochromism Elsevier Zhou, Ningning oth Zhou, Juanfang oth Zhang, Weidong oth Liu, Xingliang oth Xu, Defang oth Enthalten in Elsevier Liu, Chang ELSEVIER New ablation evolution behaviors in micro-hole drilling of 2.5D C 2021 New York, NY [u.a.] (DE-627)ELV00662605X volume:252 year:2022 pages:0 https://doi.org/10.1016/j.jlumin.2022.119323 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 51.60 Keramische Werkstoffe Hartstoffe Werkstoffkunde VZ 58.45 Gesteinshüttenkunde VZ AR 252 2022 0 |
| allfields_unstemmed |
10.1016/j.jlumin.2022.119323 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV059441291 (ELSEVIER)S0022-2313(22)00598-1 DE-627 ger DE-627 rakwb eng 670 VZ 51.60 bkl 58.45 bkl Feng, Xiucun verfasserin aut D-A type dicyanoethylenes modified by carbazole: Obvious aggregation-induced emission enhancement and high-contrast mechanofluorochromism 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Aggregation-induced emission enhancement Elsevier Intramolecular charge-transfer Elsevier dicyanoethylene Elsevier Carbazole Elsevier Mechanofluorochromism Elsevier Zhou, Ningning oth Zhou, Juanfang oth Zhang, Weidong oth Liu, Xingliang oth Xu, Defang oth Enthalten in Elsevier Liu, Chang ELSEVIER New ablation evolution behaviors in micro-hole drilling of 2.5D C 2021 New York, NY [u.a.] (DE-627)ELV00662605X volume:252 year:2022 pages:0 https://doi.org/10.1016/j.jlumin.2022.119323 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 51.60 Keramische Werkstoffe Hartstoffe Werkstoffkunde VZ 58.45 Gesteinshüttenkunde VZ AR 252 2022 0 |
| allfieldsGer |
10.1016/j.jlumin.2022.119323 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV059441291 (ELSEVIER)S0022-2313(22)00598-1 DE-627 ger DE-627 rakwb eng 670 VZ 51.60 bkl 58.45 bkl Feng, Xiucun verfasserin aut D-A type dicyanoethylenes modified by carbazole: Obvious aggregation-induced emission enhancement and high-contrast mechanofluorochromism 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Aggregation-induced emission enhancement Elsevier Intramolecular charge-transfer Elsevier dicyanoethylene Elsevier Carbazole Elsevier Mechanofluorochromism Elsevier Zhou, Ningning oth Zhou, Juanfang oth Zhang, Weidong oth Liu, Xingliang oth Xu, Defang oth Enthalten in Elsevier Liu, Chang ELSEVIER New ablation evolution behaviors in micro-hole drilling of 2.5D C 2021 New York, NY [u.a.] (DE-627)ELV00662605X volume:252 year:2022 pages:0 https://doi.org/10.1016/j.jlumin.2022.119323 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 51.60 Keramische Werkstoffe Hartstoffe Werkstoffkunde VZ 58.45 Gesteinshüttenkunde VZ AR 252 2022 0 |
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10.1016/j.jlumin.2022.119323 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001974.pica (DE-627)ELV059441291 (ELSEVIER)S0022-2313(22)00598-1 DE-627 ger DE-627 rakwb eng 670 VZ 51.60 bkl 58.45 bkl Feng, Xiucun verfasserin aut D-A type dicyanoethylenes modified by carbazole: Obvious aggregation-induced emission enhancement and high-contrast mechanofluorochromism 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. Aggregation-induced emission enhancement Elsevier Intramolecular charge-transfer Elsevier dicyanoethylene Elsevier Carbazole Elsevier Mechanofluorochromism Elsevier Zhou, Ningning oth Zhou, Juanfang oth Zhang, Weidong oth Liu, Xingliang oth Xu, Defang oth Enthalten in Elsevier Liu, Chang ELSEVIER New ablation evolution behaviors in micro-hole drilling of 2.5D C 2021 New York, NY [u.a.] (DE-627)ELV00662605X volume:252 year:2022 pages:0 https://doi.org/10.1016/j.jlumin.2022.119323 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 51.60 Keramische Werkstoffe Hartstoffe Werkstoffkunde VZ 58.45 Gesteinshüttenkunde VZ AR 252 2022 0 |
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D-A type dicyanoethylenes modified by carbazole: Obvious aggregation-induced emission enhancement and high-contrast mechanofluorochromism |
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Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. |
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Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. |
| abstract_unstemmed |
Two novel luminophores, namely CDCEEC-1 and CDCEEC-2, were synthesized from dicyanoethylene segments and D-A-type carbazoles. Decoration of dicyanoethylene with carbazole causes them to exhibit significant aggregation-induced emission enhancement (AIEE) behavior. Hence, while CDCEEC-1 and CDCEEC-2 exhibit extremely weak luminescence in common solvents, they show intense emissions because they possess highly twisted molecular structures once the molecules aggregate as nanoparticles or as solid powders. As a result of their intramolecular charge transfer (ICT) behavior, both luminophores exhibit a bathochromic effect. The combination of ICT and AIEE features not only enables CDCEEC-1 and CDCEEC-2 to have intense solid-state yellow and orange-yellow fluorescent emissions with quantum efficiencies of 0.363 and 0.328, respectively, but also imparts them with reversible and high-contrast mechanofluorochromic (MFC) behavior as a result of phase transition between crystalline and amorphous states. This behavior resulted in the emission peaks shifting from 550 nm (yellow) to 621 nm (orange-red), and from 574 nm (orange-yellow) to 648 nm (red), respectively. Our research has shown that it is feasible to produce high-efficiency ICT-AIEE-MFC luminogens with tunable emissions by using a suitable combination and modulation of donors and/or acceptors. This provides novel insights into the use of these luminogens in optical applications. |
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