Time-resolved fluorescence polarization anisotropy of multimodal samples: the asphaltene case
Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized pol...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Bruno, A. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2007 |
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| Schlagwörter: |
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| Systematik: |
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| Anmerkung: |
© Springer-Verlag 2007 |
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| Übergeordnetes Werk: |
Enthalten in: Applied physics. B, Lasers and optics - Springer-Verlag, 1981, 90(2007), 1 vom: 09. Nov., Seite 61-67 |
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| Übergeordnetes Werk: |
volume:90 ; year:2007 ; number:1 ; day:09 ; month:11 ; pages:61-67 |
| Links: |
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| DOI / URN: |
10.1007/s00340-007-2819-z |
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OLC207429025X |
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| 520 | |a Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized polydispersed particles, whose lighter fraction showed a relatively high fluorescence quantum yield. Most of the fluorescence intensity observed from the complex sample originated from a well defined sample fraction presenting a large fluorescence yield. Consequently, the TRFPA analysis only provided the average size of more fluorescing particles, that, in our case, were the smaller ones. Larger and less fluorescing aggregates did not significantly contribute to the TRFPA signal. Hence, to overcome intrinsic limitations of the TRFPA technique in characterizing multimodal samples, we preliminarily fractionated our complex samples by means of size exclusion chromatography (SEC), thus obtaining nearly monomodal fractions of the original samples. This procedure allowed to estimate also the size of less fluorescing and larger particles. A comparison of particle size estimate by means of TRFPA and SEC methods was also used to acquire information about occurrence of aggregation phenomena, and about the kind and strength of the chemical bonds linking chromophores to each other or to their parent particle. | ||
| 650 | 4 | |a Polarization Anisotropy | |
| 650 | 4 | |a Asphaltene Fraction | |
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| 650 | 4 | |a Asphaltene Particle | |
| 650 | 4 | |a Longe Wavelength Radiation | |
| 700 | 1 | |a Alfè, M. |4 aut | |
| 700 | 1 | |a Ciajolo, A. |4 aut | |
| 700 | 1 | |a de Lisio, C. |4 aut | |
| 700 | 1 | |a Minutolo, P. |4 aut | |
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10.1007/s00340-007-2819-z doi (DE-627)OLC207429025X (DE-He213)s00340-007-2819-z-p DE-627 ger DE-627 rakwb eng 530 620 VZ 530 VZ UA 9001 VZ rvk Bruno, A. verfasserin aut Time-resolved fluorescence polarization anisotropy of multimodal samples: the asphaltene case 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized polydispersed particles, whose lighter fraction showed a relatively high fluorescence quantum yield. Most of the fluorescence intensity observed from the complex sample originated from a well defined sample fraction presenting a large fluorescence yield. Consequently, the TRFPA analysis only provided the average size of more fluorescing particles, that, in our case, were the smaller ones. Larger and less fluorescing aggregates did not significantly contribute to the TRFPA signal. Hence, to overcome intrinsic limitations of the TRFPA technique in characterizing multimodal samples, we preliminarily fractionated our complex samples by means of size exclusion chromatography (SEC), thus obtaining nearly monomodal fractions of the original samples. This procedure allowed to estimate also the size of less fluorescing and larger particles. A comparison of particle size estimate by means of TRFPA and SEC methods was also used to acquire information about occurrence of aggregation phenomena, and about the kind and strength of the chemical bonds linking chromophores to each other or to their parent particle. Polarization Anisotropy Asphaltene Fraction Asphaltene Sample Asphaltene Particle Longe Wavelength Radiation Alfè, M. aut Ciajolo, A. aut de Lisio, C. aut Minutolo, P. aut Enthalten in Applied physics. B, Lasers and optics Springer-Verlag, 1981 90(2007), 1 vom: 09. Nov., Seite 61-67 (DE-627)130297682 (DE-600)579693-3 (DE-576)015877272 0946-2171 nnns volume:90 year:2007 number:1 day:09 month:11 pages:61-67 https://doi.org/10.1007/s00340-007-2819-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_60 GBV_ILN_70 GBV_ILN_130 GBV_ILN_170 GBV_ILN_285 GBV_ILN_602 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_4036 GBV_ILN_4116 GBV_ILN_4126 GBV_ILN_4266 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4323 UA 9001 AR 90 2007 1 09 11 61-67 |
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10.1007/s00340-007-2819-z doi (DE-627)OLC207429025X (DE-He213)s00340-007-2819-z-p DE-627 ger DE-627 rakwb eng 530 620 VZ 530 VZ UA 9001 VZ rvk Bruno, A. verfasserin aut Time-resolved fluorescence polarization anisotropy of multimodal samples: the asphaltene case 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized polydispersed particles, whose lighter fraction showed a relatively high fluorescence quantum yield. Most of the fluorescence intensity observed from the complex sample originated from a well defined sample fraction presenting a large fluorescence yield. Consequently, the TRFPA analysis only provided the average size of more fluorescing particles, that, in our case, were the smaller ones. Larger and less fluorescing aggregates did not significantly contribute to the TRFPA signal. Hence, to overcome intrinsic limitations of the TRFPA technique in characterizing multimodal samples, we preliminarily fractionated our complex samples by means of size exclusion chromatography (SEC), thus obtaining nearly monomodal fractions of the original samples. This procedure allowed to estimate also the size of less fluorescing and larger particles. A comparison of particle size estimate by means of TRFPA and SEC methods was also used to acquire information about occurrence of aggregation phenomena, and about the kind and strength of the chemical bonds linking chromophores to each other or to their parent particle. Polarization Anisotropy Asphaltene Fraction Asphaltene Sample Asphaltene Particle Longe Wavelength Radiation Alfè, M. aut Ciajolo, A. aut de Lisio, C. aut Minutolo, P. aut Enthalten in Applied physics. B, Lasers and optics Springer-Verlag, 1981 90(2007), 1 vom: 09. Nov., Seite 61-67 (DE-627)130297682 (DE-600)579693-3 (DE-576)015877272 0946-2171 nnns volume:90 year:2007 number:1 day:09 month:11 pages:61-67 https://doi.org/10.1007/s00340-007-2819-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_60 GBV_ILN_70 GBV_ILN_130 GBV_ILN_170 GBV_ILN_285 GBV_ILN_602 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_4036 GBV_ILN_4116 GBV_ILN_4126 GBV_ILN_4266 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4323 UA 9001 AR 90 2007 1 09 11 61-67 |
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10.1007/s00340-007-2819-z doi (DE-627)OLC207429025X (DE-He213)s00340-007-2819-z-p DE-627 ger DE-627 rakwb eng 530 620 VZ 530 VZ UA 9001 VZ rvk Bruno, A. verfasserin aut Time-resolved fluorescence polarization anisotropy of multimodal samples: the asphaltene case 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized polydispersed particles, whose lighter fraction showed a relatively high fluorescence quantum yield. Most of the fluorescence intensity observed from the complex sample originated from a well defined sample fraction presenting a large fluorescence yield. Consequently, the TRFPA analysis only provided the average size of more fluorescing particles, that, in our case, were the smaller ones. Larger and less fluorescing aggregates did not significantly contribute to the TRFPA signal. Hence, to overcome intrinsic limitations of the TRFPA technique in characterizing multimodal samples, we preliminarily fractionated our complex samples by means of size exclusion chromatography (SEC), thus obtaining nearly monomodal fractions of the original samples. This procedure allowed to estimate also the size of less fluorescing and larger particles. A comparison of particle size estimate by means of TRFPA and SEC methods was also used to acquire information about occurrence of aggregation phenomena, and about the kind and strength of the chemical bonds linking chromophores to each other or to their parent particle. Polarization Anisotropy Asphaltene Fraction Asphaltene Sample Asphaltene Particle Longe Wavelength Radiation Alfè, M. aut Ciajolo, A. aut de Lisio, C. aut Minutolo, P. aut Enthalten in Applied physics. B, Lasers and optics Springer-Verlag, 1981 90(2007), 1 vom: 09. Nov., Seite 61-67 (DE-627)130297682 (DE-600)579693-3 (DE-576)015877272 0946-2171 nnns volume:90 year:2007 number:1 day:09 month:11 pages:61-67 https://doi.org/10.1007/s00340-007-2819-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_60 GBV_ILN_70 GBV_ILN_130 GBV_ILN_170 GBV_ILN_285 GBV_ILN_602 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_4036 GBV_ILN_4116 GBV_ILN_4126 GBV_ILN_4266 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4323 UA 9001 AR 90 2007 1 09 11 61-67 |
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10.1007/s00340-007-2819-z doi (DE-627)OLC207429025X (DE-He213)s00340-007-2819-z-p DE-627 ger DE-627 rakwb eng 530 620 VZ 530 VZ UA 9001 VZ rvk Bruno, A. verfasserin aut Time-resolved fluorescence polarization anisotropy of multimodal samples: the asphaltene case 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized polydispersed particles, whose lighter fraction showed a relatively high fluorescence quantum yield. Most of the fluorescence intensity observed from the complex sample originated from a well defined sample fraction presenting a large fluorescence yield. Consequently, the TRFPA analysis only provided the average size of more fluorescing particles, that, in our case, were the smaller ones. Larger and less fluorescing aggregates did not significantly contribute to the TRFPA signal. Hence, to overcome intrinsic limitations of the TRFPA technique in characterizing multimodal samples, we preliminarily fractionated our complex samples by means of size exclusion chromatography (SEC), thus obtaining nearly monomodal fractions of the original samples. This procedure allowed to estimate also the size of less fluorescing and larger particles. A comparison of particle size estimate by means of TRFPA and SEC methods was also used to acquire information about occurrence of aggregation phenomena, and about the kind and strength of the chemical bonds linking chromophores to each other or to their parent particle. Polarization Anisotropy Asphaltene Fraction Asphaltene Sample Asphaltene Particle Longe Wavelength Radiation Alfè, M. aut Ciajolo, A. aut de Lisio, C. aut Minutolo, P. aut Enthalten in Applied physics. B, Lasers and optics Springer-Verlag, 1981 90(2007), 1 vom: 09. Nov., Seite 61-67 (DE-627)130297682 (DE-600)579693-3 (DE-576)015877272 0946-2171 nnns volume:90 year:2007 number:1 day:09 month:11 pages:61-67 https://doi.org/10.1007/s00340-007-2819-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_60 GBV_ILN_70 GBV_ILN_130 GBV_ILN_170 GBV_ILN_285 GBV_ILN_602 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_4036 GBV_ILN_4116 GBV_ILN_4126 GBV_ILN_4266 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4323 UA 9001 AR 90 2007 1 09 11 61-67 |
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10.1007/s00340-007-2819-z doi (DE-627)OLC207429025X (DE-He213)s00340-007-2819-z-p DE-627 ger DE-627 rakwb eng 530 620 VZ 530 VZ UA 9001 VZ rvk Bruno, A. verfasserin aut Time-resolved fluorescence polarization anisotropy of multimodal samples: the asphaltene case 2007 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer-Verlag 2007 Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized polydispersed particles, whose lighter fraction showed a relatively high fluorescence quantum yield. Most of the fluorescence intensity observed from the complex sample originated from a well defined sample fraction presenting a large fluorescence yield. Consequently, the TRFPA analysis only provided the average size of more fluorescing particles, that, in our case, were the smaller ones. Larger and less fluorescing aggregates did not significantly contribute to the TRFPA signal. Hence, to overcome intrinsic limitations of the TRFPA technique in characterizing multimodal samples, we preliminarily fractionated our complex samples by means of size exclusion chromatography (SEC), thus obtaining nearly monomodal fractions of the original samples. This procedure allowed to estimate also the size of less fluorescing and larger particles. A comparison of particle size estimate by means of TRFPA and SEC methods was also used to acquire information about occurrence of aggregation phenomena, and about the kind and strength of the chemical bonds linking chromophores to each other or to their parent particle. Polarization Anisotropy Asphaltene Fraction Asphaltene Sample Asphaltene Particle Longe Wavelength Radiation Alfè, M. aut Ciajolo, A. aut de Lisio, C. aut Minutolo, P. aut Enthalten in Applied physics. B, Lasers and optics Springer-Verlag, 1981 90(2007), 1 vom: 09. Nov., Seite 61-67 (DE-627)130297682 (DE-600)579693-3 (DE-576)015877272 0946-2171 nnns volume:90 year:2007 number:1 day:09 month:11 pages:61-67 https://doi.org/10.1007/s00340-007-2819-z lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-PHY GBV_ILN_21 GBV_ILN_22 GBV_ILN_30 GBV_ILN_31 GBV_ILN_60 GBV_ILN_70 GBV_ILN_130 GBV_ILN_170 GBV_ILN_285 GBV_ILN_602 GBV_ILN_2010 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_4036 GBV_ILN_4116 GBV_ILN_4126 GBV_ILN_4266 GBV_ILN_4277 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4323 UA 9001 AR 90 2007 1 09 11 61-67 |
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Time-resolved fluorescence polarization anisotropy of multimodal samples: the asphaltene case |
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Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized polydispersed particles, whose lighter fraction showed a relatively high fluorescence quantum yield. Most of the fluorescence intensity observed from the complex sample originated from a well defined sample fraction presenting a large fluorescence yield. Consequently, the TRFPA analysis only provided the average size of more fluorescing particles, that, in our case, were the smaller ones. Larger and less fluorescing aggregates did not significantly contribute to the TRFPA signal. Hence, to overcome intrinsic limitations of the TRFPA technique in characterizing multimodal samples, we preliminarily fractionated our complex samples by means of size exclusion chromatography (SEC), thus obtaining nearly monomodal fractions of the original samples. This procedure allowed to estimate also the size of less fluorescing and larger particles. A comparison of particle size estimate by means of TRFPA and SEC methods was also used to acquire information about occurrence of aggregation phenomena, and about the kind and strength of the chemical bonds linking chromophores to each other or to their parent particle. © Springer-Verlag 2007 |
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Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized polydispersed particles, whose lighter fraction showed a relatively high fluorescence quantum yield. Most of the fluorescence intensity observed from the complex sample originated from a well defined sample fraction presenting a large fluorescence yield. Consequently, the TRFPA analysis only provided the average size of more fluorescing particles, that, in our case, were the smaller ones. Larger and less fluorescing aggregates did not significantly contribute to the TRFPA signal. Hence, to overcome intrinsic limitations of the TRFPA technique in characterizing multimodal samples, we preliminarily fractionated our complex samples by means of size exclusion chromatography (SEC), thus obtaining nearly monomodal fractions of the original samples. This procedure allowed to estimate also the size of less fluorescing and larger particles. A comparison of particle size estimate by means of TRFPA and SEC methods was also used to acquire information about occurrence of aggregation phenomena, and about the kind and strength of the chemical bonds linking chromophores to each other or to their parent particle. © Springer-Verlag 2007 |
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Abstract In this work we describe an application of the time-resolved fluorescence polarization anisotropy (TRFPA) technique to the analysis of asphaltenes, complex mixtures of high-molecular weight compounds, typically present in petroleum oils. Our asphaltene samples consist of nanometer-sized polydispersed particles, whose lighter fraction showed a relatively high fluorescence quantum yield. Most of the fluorescence intensity observed from the complex sample originated from a well defined sample fraction presenting a large fluorescence yield. Consequently, the TRFPA analysis only provided the average size of more fluorescing particles, that, in our case, were the smaller ones. Larger and less fluorescing aggregates did not significantly contribute to the TRFPA signal. Hence, to overcome intrinsic limitations of the TRFPA technique in characterizing multimodal samples, we preliminarily fractionated our complex samples by means of size exclusion chromatography (SEC), thus obtaining nearly monomodal fractions of the original samples. This procedure allowed to estimate also the size of less fluorescing and larger particles. A comparison of particle size estimate by means of TRFPA and SEC methods was also used to acquire information about occurrence of aggregation phenomena, and about the kind and strength of the chemical bonds linking chromophores to each other or to their parent particle. © Springer-Verlag 2007 |
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