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Solvatochromism, multiphoton fluorescence, and resonance energy transfer in a new octupolar dye-pair
Date Issued
29-03-2013
Author(s)
Namboodiri, C. K.R.
Indian Institute of Technology, Madras
Mukkamala, R.
Chandra, B.
Indian Institute of Technology, Madras
Abstract
A new octupolar molecule (E, E, E)-2,4,6-Tris [2-(4-N, N- diphenylaminophenyl) vinyl] pyridine (DPATSP) has been synthesized and studied by steady state and time-resolved fluorescence in condensed phase. The large π-conjugation along the chain has been found to be responsible for large solvent-induced shift of fluorescence. Pumping with fs pulses at 790 nm have been found to induce the two-photon fluorescence. The two-photon absorption (2PA) cross section has been measured by the two photon induced fluorescence (2PIF) method. The N-methyl derivative of DPATSP shows a red shift in the absorption spectrum. The overlap of the fluorescence spectrum of DPATSP with the absorption spectrum of the DPATSP-Me makes a Förster resonance energy transfer (FRET) system. The FRET efficiency has been studied by embedding this dye pair in a polymer matrix. © 2013 Elsevier B.V. All rights reserved.
Volume
415