Related Experiment Video
Updated: Jul 7, 2026

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
Published on: June 10, 2021
Coumarinyl(thienyl)thiazoles: novel photochromes with modulated fluorescence
Valery F Traven1, Andrei Y Bochkov, Mikhail M Krayushkin
1Mendeleev University of Chemical Technology, Moscow 125047, Miusskaya sq., 9, Russian Federation. traven@muctr.ru
Abstract:
Novel photochromic 5-(3'-coumarinyl)-4-(3''-thienyl)thiazoles have been synthesized. These compounds display intensive fluorescence emission in the open form A, which is modulated by light. Fluorescence intensity decreases significantly upon irradiation of A with UV-light (lambda<400 nm) due to formation of the cyclic form B. Irradiation of B with visible light (lambda>470 nm) promotes its opening and the recovering of fluorescence. Novel dihetarylethenes undergo photochromic modulation of fluorescence both in solution and in polymeric matrices.
Related Concept Videos
Variables Affecting Phosphorescence and Fluorescence
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Cycloaddition Reactions: MO Requirements for Photochemical Activation
Photoluminescence: Applications
Fluorescence and Phosphorescence: Instrumentation

![Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F60786.jpg&w=3840&q=50)