The Chromic Response to Environment of some Imine-Based Oligomers

Abstract:

Among the organic materials widely studied for applications in advanced techniques, imine-based compounds (or azomethines) have received considerable attention due to their ability to reversibly change the color under the action of an external stimulus. The halochromic or photochromic behavior of imines is based on the protonation or photoizomerization ability of the imine linkage, the color changing effect occurring in response to the change in pH of the surrounding medium or electromagnetic radiation absorption. Starting from these aspects, three imine-based oligomers with a donor-acceptor-donor topology containing phenoxazine as the donor unit and diphenyl-1,3,4-oxadiazole, 9,9-diphenylfluorene or fluorene as an acceptor moiety were thoroughly investigated with respect to their protonation and photoiradiation behavior, evaluated by means of photo-physics analysis.

• Periodical: Key Engineering Materials (Volume 826)
• Pages: 91-101
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.826.91
• Online since: October 2019
• Authors: Catalin Paul Constantin*, Andra Elena Bejan, Mariana Dana Damaceanu
• Keywords: Imines, Optical Properties, Protonation

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