Conformational reorganization and solvation dynamics of dendritic oligothiophenes.

Conformational reorganization and solvation dynamics of dendritic oligothiophenes. Research Abstract Details 

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Conformational reorganization and solvation dynamics of dendritic oligothiophenes. Abstract Text:

Yong Zhang,Zhenjia Wang,Man-Kit Ng,Lewis J Rothberg,Yong Zhang,Zhenjia Wang,Man-Kit Ng,Lewis J Rothberg,

We report experiments on dendritic molecules with integrated conjugated chromophores that provide microscopic mechanistic information about their solvation dynamics. The fluorescence of a series of immobilized dendritically organized oligothiophenes is studied as they are exposed to good solvents. Initially, the pi-stacking of the oligothiophene units in the dendrimer is destabilized, but full separation of the oligothiophene dendrons takes a time that is orders of magnitude longer due to barriers to torsional motion of the ester linkages. The metastable state prior to separation of the conjugated segments exhibits solution-like spectroscopy but low fluorescence quantum yield relative to the fully solvated segments. This species may play an important role in the photophysics of conjugated oligomer and polymer films. Unusual non-exponential kinetics for the oligothiophene separation step are observed and can be understood in terms of energy transfer among the dendrons.

Conformational reorganization and solvation dynamics of dendritic oligothiophenes. Publishing Authors By Initials

Y Zhang,Z Wang,MK Ng,LJ Rothberg,Y Zhang,Z Wang,MK Ng,LJ Rothberg,

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Conformational reorganization and solvation dynamics of dendritic oligothiophenes. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The journal of physical chemistry. B

VOLUME: 111

Page Numbers: 13211-6

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ISSN: 1520-6106

DAY: 31

MONTH: 10

YEAR: 2007

Conformational reorganization and solvation dynamics of dendritic oligothiophenes. Information

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LANGUAGE: eng

NlmUniqueID: 101157530

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Grant and Affiliation Information for Conformational reorganization and solvation dynamics of dendritic oligothiophenes.

AFFILIATION: Department of Chemical Engineering, University of Rochester, Rochester, New York 14627, USA.

Country: United States

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MEDLINETA: J Phys Chem B

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