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Proceedings Paper

Chemically responsive fluorophores exhibiting large color changes
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Paper Abstract

The design, synthesis, and characterization of a series of styryl pyrazine derivatives as chemically responsive fluorophores are reported. These styryl pyrazines were ideal for structure-property relationship studies designed to elucidate the role of molecular symmetry, polarity, planarity and cooperative and competitive intramolecular charge transfer interactions in determining their colorimetric or fluorimetric responses. These fluorophores were designed to exhibit large changes in emission in response to changes in solvent composition or addition of various analyte species. The large solvatochromic and analyte-induced changes in their spectra were related to the nature of molecular polarization upon excitation, as well as stabilization of the excited state by the molecular environment. Several of these molecules shared the structural and electronic features common to quadupolar two-photon chromophores, and were thus expected to function as chemically responsive two-photon fluorophores, as well. Calculations of their second hyperpolarizabilities (γ(-ω;ω,-ω,ω))and comparison to known two-photon molecules showed that these molecules were expected to be exceptional two-photon active molecules.

Paper Details

Date Published: 4 November 2002
PDF: 14 pages
Proc. SPIE 4809, Nanoscale Optics and Applications, (4 November 2002); doi: 10.1117/12.453778
Show Author Affiliations
Jeremy C. Collette, Univ. of Southern California (United States)
Aaron W. Harper, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 4809:
Nanoscale Optics and Applications
Guozhong Cao; Wiley P. Kirk, Editor(s)

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