Diheteroarylethenes as thermally stable photoswitchable acceptors in photochromic fluorescence resonance energy transfer (pcFRET)
We have employed diheteroarylethenes as acceptors for photochromic FRET (pcFRET), a technique introduced for the quantitative determination of fluorescence resonance energy transfer (FRET). In pcFRET, the fluorescent emission of the donor is modulated by cyclical transformations of a photochromic ac...
Guardado en:
| Autores principales: | , |
|---|---|
| Publicado: |
2002
|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v124_n25_p7481_Giordano http://hdl.handle.net/20.500.12110/paper_00027863_v124_n25_p7481_Giordano |
| Aporte de: |
| id |
paper:paper_00027863_v124_n25_p7481_Giordano |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_00027863_v124_n25_p7481_Giordano2023-06-08T14:22:37Z Diheteroarylethenes as thermally stable photoswitchable acceptors in photochromic fluorescence resonance energy transfer (pcFRET) Giordano, Luciana Jares, Elizabeth Andrea Quantum yields Electromagnetic wave emission Energy transfer Fluorescence Photochromism Reaction kinetics Organic compounds ethylene derivative article calculation chemical modification cyclization fluorescence fluorescence resonance energy transfer molecular stability quantitative analysis quantum theory structure analysis thermostability ultraviolet radiation We have employed diheteroarylethenes as acceptors for photochromic FRET (pcFRET), a technique introduced for the quantitative determination of fluorescence resonance energy transfer (FRET). In pcFRET, the fluorescent emission of the donor is modulated by cyclical transformations of a photochromic acceptor. Light induces a reversible change in the structure and, concomitantly, in the absorption properties of the acceptor. Only the closed forms of the selected diheteroarylethenes 2a and 2b have an absorption band overlapping the emission band of the donor, 1. The corresponding variation in the overlap integral (and thus critical transfer distance Ro) between the two states provides the means for reversibly switching the process of FRET on and off, allowing direct and repeated evaluation of the relative changes in the donor fluorescence quantum yield. The diheteroarylethenes demonstrate excellent stability in aqueous media, an absence of thermal back reactions, and negligible fatigue. The equilibration of these systems after exposure to near-UV or visible light follows simple monoexponential kinetics. We developed a general conceptual scheme for such coupled photochromic-FRET reactions, allowing quantitative interpretations of the photostationary and kinetic data, from which the quantum yields for the cyclization and cycloreversion reactions of the photochromic acceptor were calculated. Fil:Giordano, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Jares-Erijman, E.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v124_n25_p7481_Giordano http://hdl.handle.net/20.500.12110/paper_00027863_v124_n25_p7481_Giordano |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Quantum yields Electromagnetic wave emission Energy transfer Fluorescence Photochromism Reaction kinetics Organic compounds ethylene derivative article calculation chemical modification cyclization fluorescence fluorescence resonance energy transfer molecular stability quantitative analysis quantum theory structure analysis thermostability ultraviolet radiation |
| spellingShingle |
Quantum yields Electromagnetic wave emission Energy transfer Fluorescence Photochromism Reaction kinetics Organic compounds ethylene derivative article calculation chemical modification cyclization fluorescence fluorescence resonance energy transfer molecular stability quantitative analysis quantum theory structure analysis thermostability ultraviolet radiation Giordano, Luciana Jares, Elizabeth Andrea Diheteroarylethenes as thermally stable photoswitchable acceptors in photochromic fluorescence resonance energy transfer (pcFRET) |
| topic_facet |
Quantum yields Electromagnetic wave emission Energy transfer Fluorescence Photochromism Reaction kinetics Organic compounds ethylene derivative article calculation chemical modification cyclization fluorescence fluorescence resonance energy transfer molecular stability quantitative analysis quantum theory structure analysis thermostability ultraviolet radiation |
| description |
We have employed diheteroarylethenes as acceptors for photochromic FRET (pcFRET), a technique introduced for the quantitative determination of fluorescence resonance energy transfer (FRET). In pcFRET, the fluorescent emission of the donor is modulated by cyclical transformations of a photochromic acceptor. Light induces a reversible change in the structure and, concomitantly, in the absorption properties of the acceptor. Only the closed forms of the selected diheteroarylethenes 2a and 2b have an absorption band overlapping the emission band of the donor, 1. The corresponding variation in the overlap integral (and thus critical transfer distance Ro) between the two states provides the means for reversibly switching the process of FRET on and off, allowing direct and repeated evaluation of the relative changes in the donor fluorescence quantum yield. The diheteroarylethenes demonstrate excellent stability in aqueous media, an absence of thermal back reactions, and negligible fatigue. The equilibration of these systems after exposure to near-UV or visible light follows simple monoexponential kinetics. We developed a general conceptual scheme for such coupled photochromic-FRET reactions, allowing quantitative interpretations of the photostationary and kinetic data, from which the quantum yields for the cyclization and cycloreversion reactions of the photochromic acceptor were calculated. |
| author |
Giordano, Luciana Jares, Elizabeth Andrea |
| author_facet |
Giordano, Luciana Jares, Elizabeth Andrea |
| author_sort |
Giordano, Luciana |
| title |
Diheteroarylethenes as thermally stable photoswitchable acceptors in photochromic fluorescence resonance energy transfer (pcFRET) |
| title_short |
Diheteroarylethenes as thermally stable photoswitchable acceptors in photochromic fluorescence resonance energy transfer (pcFRET) |
| title_full |
Diheteroarylethenes as thermally stable photoswitchable acceptors in photochromic fluorescence resonance energy transfer (pcFRET) |
| title_fullStr |
Diheteroarylethenes as thermally stable photoswitchable acceptors in photochromic fluorescence resonance energy transfer (pcFRET) |
| title_full_unstemmed |
Diheteroarylethenes as thermally stable photoswitchable acceptors in photochromic fluorescence resonance energy transfer (pcFRET) |
| title_sort |
diheteroarylethenes as thermally stable photoswitchable acceptors in photochromic fluorescence resonance energy transfer (pcfret) |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v124_n25_p7481_Giordano http://hdl.handle.net/20.500.12110/paper_00027863_v124_n25_p7481_Giordano |
| work_keys_str_mv |
AT giordanoluciana diheteroarylethenesasthermallystablephotoswitchableacceptorsinphotochromicfluorescenceresonanceenergytransferpcfret AT jareselizabethandrea diheteroarylethenesasthermallystablephotoswitchableacceptorsinphotochromicfluorescenceresonanceenergytransferpcfret |
| _version_ |
1768544064225935360 |