Toward multi-addressable molecular systems: Efficient synthesis and photochromic performance of unsymmetrical bisthienylethenes

摘要

Various synthetic routes have been compared to access to unsymmetrical 1,2-bisthienylper-fluorocyclopentenes having one electro-withdrawing formyl group. The strategy based on key mono-susbtituted cyclopentenes appears to be the most reliable and versatile synthetic approach. Applying this controlled sequential synthesis to appropriate thiophenic building blocks leads to the preparation of π-conjugated extended push—pull system where photochromic performance were characterised.