Small Molecules as Long-Wavelength Fluorophores: Push-Pull Substituted 4-Alkoxy-1,3-thiazoles
Received: 12 July 2017
Accepted after revision: 07 September 2017
26 September 2017 (eFirst)
Dedicated to Professor Waldemar Adam on the occasion of his 80th birthday
A series of donor-π-acceptor (D-π-A) substituted 4-hydroxythiazoles have been synthesized. Electron-donating groups (4-methoxyphenyl and 4-dimethylaminophenyl) were installed in the 5-position of the thiazole; thiophene/pyridine-bridged acceptors (formyl groups and their Knoevenagel condensation products) were placed in the 2-position. The influence of D-π-A character on the photophysical properties and electronic structure was investigated by means of UV/Vis and fluorescence spectroscopy.