Structural Control of the Excited-State Dynamics of Bis(dipyrrinato)zinc Complexes: Self-Assembling Chromophores for Light-Harvesting Architectures
The replacement of the phenyl rings at the 5,5‘-positions of a bis(dipyrrinato)zinc complex with mesityl groups transforms the molecule from a very weak emitter that deactivates rapidly after photoexcitation (Φf = 0.006; τ ≈ 90 ps) to a highly fluorescent chromophore with a long-lived singlet excite...
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| Veröffentlicht in: | Journal of the American Chemical Society 2004-03, Vol.126 (9), p.2664-2665 |
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| container_issue | 9 |
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| container_title | Journal of the American Chemical Society |
| container_volume | 126 |
| creator | Sazanovich, Igor V Kirmaier, Christine Hindin, Eve Yu, Lianhe Bocian, David F Lindsey, Jonathan S Holten, Dewey |
| description | The replacement of the phenyl rings at the 5,5‘-positions of a bis(dipyrrinato)zinc complex with mesityl groups transforms the molecule from a very weak emitter that deactivates rapidly after photoexcitation (Φf = 0.006; τ ≈ 90 ps) to a highly fluorescent chromophore with a long-lived singlet excited state (Φf = 0.36; τ ≈ 3 ns). The results demonstrate that steric constraints on aryl-ring internal rotation dramatically alter the excited-state properties of 5,5‘-substituted bis(dipyrrinato)metal complexes. The insights establish the foundation for tuning the photophysical properties of these chromophores for use in diverse photochemical applications. |
| doi_str_mv | 10.1021/ja038763k |
| format | Article |
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The results demonstrate that steric constraints on aryl-ring internal rotation dramatically alter the excited-state properties of 5,5‘-substituted bis(dipyrrinato)metal complexes. 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Am. Chem. Soc</addtitle><description>The replacement of the phenyl rings at the 5,5‘-positions of a bis(dipyrrinato)zinc complex with mesityl groups transforms the molecule from a very weak emitter that deactivates rapidly after photoexcitation (Φf = 0.006; τ ≈ 90 ps) to a highly fluorescent chromophore with a long-lived singlet excited state (Φf = 0.36; τ ≈ 3 ns). The results demonstrate that steric constraints on aryl-ring internal rotation dramatically alter the excited-state properties of 5,5‘-substituted bis(dipyrrinato)metal complexes. 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Am. Chem. Soc</addtitle><date>2004-03-10</date><risdate>2004</risdate><volume>126</volume><issue>9</issue><spage>2664</spage><epage>2665</epage><pages>2664-2665</pages><issn>0002-7863</issn><eissn>1520-5126</eissn><coden>JACSAT</coden><abstract>The replacement of the phenyl rings at the 5,5‘-positions of a bis(dipyrrinato)zinc complex with mesityl groups transforms the molecule from a very weak emitter that deactivates rapidly after photoexcitation (Φf = 0.006; τ ≈ 90 ps) to a highly fluorescent chromophore with a long-lived singlet excited state (Φf = 0.36; τ ≈ 3 ns). The results demonstrate that steric constraints on aryl-ring internal rotation dramatically alter the excited-state properties of 5,5‘-substituted bis(dipyrrinato)metal complexes. The insights establish the foundation for tuning the photophysical properties of these chromophores for use in diverse photochemical applications.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>14995159</pmid><doi>10.1021/ja038763k</doi><tpages>2</tpages></addata></record> |
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| subjects | Atomic and molecular physics Exact sciences and technology Fluorescence and phosphorescence radiationless transitions, quenching (intersystem crossing, internal conversion) Molecular properties and interactions with photons Physics Radiationless transitions, quenching |
| title | Structural Control of the Excited-State Dynamics of Bis(dipyrrinato)zinc Complexes: Self-Assembling Chromophores for Light-Harvesting Architectures |
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