The cyclotriphosphazene-based covalent organic frameworks constructed entirely by flexible building blocks for adsorping and fluorescence sensing iodine
A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not o...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Zhu, Hai [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Impact of North Atlantic-East Asian teleconnections on extremely high January PM - Kim, Jeong-Hun ELSEVIER, 2021, the official journal of the International Zeolite Association, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:343 ; year:2022 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.micromeso.2022.112165 |
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ELV058824928 |
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| 245 | 1 | 4 | |a The cyclotriphosphazene-based covalent organic frameworks constructed entirely by flexible building blocks for adsorping and fluorescence sensing iodine |
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| 520 | |a A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. | ||
| 520 | |a A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. | ||
| 650 | 7 | |a Flexible |2 Elsevier | |
| 650 | 7 | |a Adsorption |2 Elsevier | |
| 650 | 7 | |a Fluorescent sense |2 Elsevier | |
| 650 | 7 | |a Covalent organic framework |2 Elsevier | |
| 650 | 7 | |a Iodine |2 Elsevier | |
| 700 | 1 | |a Geng, Tong-Mou |4 oth | |
| 700 | 1 | |a Tang, Kai-Bin |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier |a Kim, Jeong-Hun ELSEVIER |t Impact of North Atlantic-East Asian teleconnections on extremely high January PM |d 2021 |d the official journal of the International Zeolite Association |g Amsterdam [u.a.] |w (DE-627)ELV006778283 |
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10.1016/j.micromeso.2022.112165 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001890.pica (DE-627)ELV058824928 (ELSEVIER)S1387-1811(22)00483-8 DE-627 ger DE-627 rakwb eng 333.7 570 690 VZ BIODIV DE-30 fid 48.00 bkl Zhu, Hai verfasserin aut The cyclotriphosphazene-based covalent organic frameworks constructed entirely by flexible building blocks for adsorping and fluorescence sensing iodine 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. Flexible Elsevier Adsorption Elsevier Fluorescent sense Elsevier Covalent organic framework Elsevier Iodine Elsevier Geng, Tong-Mou oth Tang, Kai-Bin oth Enthalten in Elsevier Kim, Jeong-Hun ELSEVIER Impact of North Atlantic-East Asian teleconnections on extremely high January PM 2021 the official journal of the International Zeolite Association Amsterdam [u.a.] (DE-627)ELV006778283 volume:343 year:2022 pages:0 https://doi.org/10.1016/j.micromeso.2022.112165 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA SSG-OPC-FOR 48.00 Land- und Forstwirtschaft: Allgemeines VZ AR 343 2022 0 |
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10.1016/j.micromeso.2022.112165 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001890.pica (DE-627)ELV058824928 (ELSEVIER)S1387-1811(22)00483-8 DE-627 ger DE-627 rakwb eng 333.7 570 690 VZ BIODIV DE-30 fid 48.00 bkl Zhu, Hai verfasserin aut The cyclotriphosphazene-based covalent organic frameworks constructed entirely by flexible building blocks for adsorping and fluorescence sensing iodine 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. Flexible Elsevier Adsorption Elsevier Fluorescent sense Elsevier Covalent organic framework Elsevier Iodine Elsevier Geng, Tong-Mou oth Tang, Kai-Bin oth Enthalten in Elsevier Kim, Jeong-Hun ELSEVIER Impact of North Atlantic-East Asian teleconnections on extremely high January PM 2021 the official journal of the International Zeolite Association Amsterdam [u.a.] (DE-627)ELV006778283 volume:343 year:2022 pages:0 https://doi.org/10.1016/j.micromeso.2022.112165 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA SSG-OPC-FOR 48.00 Land- und Forstwirtschaft: Allgemeines VZ AR 343 2022 0 |
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10.1016/j.micromeso.2022.112165 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001890.pica (DE-627)ELV058824928 (ELSEVIER)S1387-1811(22)00483-8 DE-627 ger DE-627 rakwb eng 333.7 570 690 VZ BIODIV DE-30 fid 48.00 bkl Zhu, Hai verfasserin aut The cyclotriphosphazene-based covalent organic frameworks constructed entirely by flexible building blocks for adsorping and fluorescence sensing iodine 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. Flexible Elsevier Adsorption Elsevier Fluorescent sense Elsevier Covalent organic framework Elsevier Iodine Elsevier Geng, Tong-Mou oth Tang, Kai-Bin oth Enthalten in Elsevier Kim, Jeong-Hun ELSEVIER Impact of North Atlantic-East Asian teleconnections on extremely high January PM 2021 the official journal of the International Zeolite Association Amsterdam [u.a.] (DE-627)ELV006778283 volume:343 year:2022 pages:0 https://doi.org/10.1016/j.micromeso.2022.112165 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA SSG-OPC-FOR 48.00 Land- und Forstwirtschaft: Allgemeines VZ AR 343 2022 0 |
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10.1016/j.micromeso.2022.112165 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001890.pica (DE-627)ELV058824928 (ELSEVIER)S1387-1811(22)00483-8 DE-627 ger DE-627 rakwb eng 333.7 570 690 VZ BIODIV DE-30 fid 48.00 bkl Zhu, Hai verfasserin aut The cyclotriphosphazene-based covalent organic frameworks constructed entirely by flexible building blocks for adsorping and fluorescence sensing iodine 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. Flexible Elsevier Adsorption Elsevier Fluorescent sense Elsevier Covalent organic framework Elsevier Iodine Elsevier Geng, Tong-Mou oth Tang, Kai-Bin oth Enthalten in Elsevier Kim, Jeong-Hun ELSEVIER Impact of North Atlantic-East Asian teleconnections on extremely high January PM 2021 the official journal of the International Zeolite Association Amsterdam [u.a.] (DE-627)ELV006778283 volume:343 year:2022 pages:0 https://doi.org/10.1016/j.micromeso.2022.112165 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA SSG-OPC-FOR 48.00 Land- und Forstwirtschaft: Allgemeines VZ AR 343 2022 0 |
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10.1016/j.micromeso.2022.112165 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001890.pica (DE-627)ELV058824928 (ELSEVIER)S1387-1811(22)00483-8 DE-627 ger DE-627 rakwb eng 333.7 570 690 VZ BIODIV DE-30 fid 48.00 bkl Zhu, Hai verfasserin aut The cyclotriphosphazene-based covalent organic frameworks constructed entirely by flexible building blocks for adsorping and fluorescence sensing iodine 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. Flexible Elsevier Adsorption Elsevier Fluorescent sense Elsevier Covalent organic framework Elsevier Iodine Elsevier Geng, Tong-Mou oth Tang, Kai-Bin oth Enthalten in Elsevier Kim, Jeong-Hun ELSEVIER Impact of North Atlantic-East Asian teleconnections on extremely high January PM 2021 the official journal of the International Zeolite Association Amsterdam [u.a.] (DE-627)ELV006778283 volume:343 year:2022 pages:0 https://doi.org/10.1016/j.micromeso.2022.112165 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA SSG-OPC-FOR 48.00 Land- und Forstwirtschaft: Allgemeines VZ AR 343 2022 0 |
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cyclotriphosphazene-based covalent organic frameworks constructed entirely by flexible building blocks for adsorping and fluorescence sensing iodine |
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The cyclotriphosphazene-based covalent organic frameworks constructed entirely by flexible building blocks for adsorping and fluorescence sensing iodine |
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A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. |
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A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. |
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A series of flexible cyclotriphosphazene-based COFs, we call them fully flexible cyclotriphosphazene-based COFs (HDADE, HBAPB and HBPDA), were prepared by means of reversible Schiff base polycondensation reactions for the first time, which were constructed entirely by flexible building blocks, not only hexa(4-formyl-phenoxy)cyclotriphosphazene (NOP–6–CHO) as a flexible knot but also aromatic ether diamine as flexible linkers. The fully flexible cyclotriphosphazene-based COFs are crystalline porous materials. Their crystallinity and BET specific surface areas increase with the length of the linkers, and are higher than that of the corresponding COFs constructed by the rigid linkers. HDADE, HBAPB and HBPDA can absorb iodine in both gas or liquid phase. The adsorptive capacities are 5.22, 4.55, and 3.86 g g−1, respectively, which are higher than the corresponding COFs formed by rigid linkers. The fully flexible cyclotriphosphazene-based COFs can fluorescently sense iodine with high sensitivity. Their quenching constants (KSV) are 2.22 × 104, 7.07 × 104, and 1.04 × 104 L mol−1. Their LODs are 1.35 × 10−10, 4.24 × 10−11, and 2.88 × 10−10 mol L−1, respectively. The fluorescence quenching of iodine to the fully flexible cyclotriphosphazene-based COFs has both photo-induced charge transfer and resonant energy transfer processes. |
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