Multiparameter molecular sensor based on a compound containing tetrathiafulvalenium, thiophene and pyridine fragments

Annelated tricyclic thiophenes and their photophysical properties

“…In view of our experience in the synthesis of thiophene-containing stilbenes, 22 now we report the oxidative intramolecular photo cyclization of 3-styrylthiophenes containing 3,4-dimethoxy (1) and 15-crown-5 ether (2) groups attached or annelated to its phenyl side (Scheme 1) † and photophysical characteristics of the obtained polycyclic products. The starting styryl derivatives were synthesized by the diethylphosphonate procedure ensuring the E configuration of the double bond (see coupling constant for E-C=C fragment in Figures S1, S5, Online Supplementary Materials, X-ray crystallography ‡ data for compound 1 in Figure 1 2,3,5,6,8,9,11,2' 7,8] spin system analysis).…”