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Updated: Mar 13, 2026

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
Published on: June 10, 2021
Halochromism and protonation-induced assembly of a benzo[g]indolo[2,3-b]quinoxaline derivative
Hayden T Black1, Ian Pelse1, Rylan M W Wolfe1
1School of Chemistry and Biochemistry and School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, 30332, Georgia. reynolds@chemistry.gatech.edu.
Abstract:
A new halochromic compound is reported with pronounced UV/Vis spectral responses that depend on the extent of protonation and on the counter-ion structure. The absorption can be controlled over the entire visible spectrum and into the near-IR via a protonation-induced assembly mechanism. Thin-films were used for colorimetric detection of acid vapors.
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