Spectroscopic properties of meso-thienylporphyrins with different porphyrin cores

Gupta, Iti ; Ravikanth, Mangalampalli (2006) Spectroscopic properties of meso-thienylporphyrins with different porphyrin cores Journal of Photochemistry and Photobiology A: Chemistry, 177 (2-3). pp. 156-163. ISSN 1010-6030

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jphotochem.2005.05.020

Abstract

The absorption and fluorescence properties of a series of meso-thienylporphyrins with different porphyrin cores (N4, N3O, N3S and N2S2 cores) were studied and compared with the corresponding meso-tetraarylporphyrins. The replacement of six-membered phenyl groups with five-membered thienyl groups at meso-positions resulted in red shifts and broadening of absorption and emission bands, low quantum yields and decreased S1 state lifetimes and the maximum effects were observed for meso-tetrathienylporphyrin with N2S2 porphyrin core. Similar observations were noted for the dications of meso-thienylporphyrins compared to the dications of the corresponding meso-tetraarylporphyrins. These results suggest that the replacement of six-membered aryl group with five-membered thienyl groups at meso-positions, the electronic properties of the porphyrin were altered significantly.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Heteroporphyrins; Spectroscopic Properties; Meso-thienylporphyrins
ID Code:104551
Deposited On:01 Dec 2017 10:51
Last Modified:01 Dec 2017 10:51

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