Chemistry Faculty Publications
Document Type
Article
Abstract
A series of conjugated materials based on oligomers of the para-phenylene type and oligothiophenes was prepared, and their phosphorescence spectra were recorded at 77 K using a pulsed flash-lamp as a light source and gated detection. The triplet energies of the oligomers were estimated and correlated with their chemical structure. It was found that simple changes in the building block sequence in the thiophene-containing oligomers allowed for tuning the triplet energy from 1.86 to 2.35 eV (530-670 nm). Hypsochromic shifts and little variation of the triplet energy were obtained with increasing length of the pi-system for thiophene end-capped oligomers, contrary to the usual behavior of unsubstituted oligomers. The experimental results were supported with theoretical computations from density functional theory (B3LYP/6-31G*) calculations, which indicated that changes in the geometry and delocalization of the triplet excited state account for the trends in the triplet energy evolution.
Copyright Statement
Publisher PDF
Repository Citation
Estrada, Leandro A.; Montes, Victor A.; Zyryanov, Grigory; and Anzenbacher, Pavel Jr., "Triplet Energy Studies Of Thiophene And Para-phenylene Based Oligomers" (2007). Chemistry Faculty Publications. 64.
https://scholarworks.bgsu.edu/chem_pub/64
Publication Date
6-2007
Publication Title
Journal Of Physical Chemistry B
DOI
https://doi.org/10.1021/jp0726945
Start Page No.
6983
End Page No.
6986