Cyclic and linear conjugated small molecules comprising dithienylethene (DTE) and thiophene groups were synthesized via Suzuki and McMurry couplings. The cyclic molecule was polymerized via ring-opening metathesis polymerization (ROMP) using a second-generation Grubbs catalyst to produce a DTE- and thienylene vinylene-containing conjugated polymer. DTE-containing small molecules exhibited (quasi-) reversible photochromism through alternating UV and visible light irradiation. The small linear molecules showed faster photochromism than the cyclic molecule. In contrast, the linear dimer and polymer did not undergo photochromism; however, they showed efficient photoluminescence, with quantum yields of 0.26 and 0.18, respectively.

通过 Suzuki 和 McMurry 偶联合成包含二噻吩乙烯 (DTE) 和噻吩基团的环状和线性共轭小分子。环状分子通过开环复分解聚合 (ROMP) 使用第二代 Grubbs 催化剂进行聚合，以生产含 DTE 和亚乙烯基的共轭聚合物。含有 DTE 的小分子通过交替的紫外线和可见光照射表现出（准）可逆的光致变色。线性小分子比环状分子表现出更快的光致变色。相比之下，线性二聚体和聚合物没有发生光致变色；然而，它们显示出高效的光致发光，量子产率分别为 0.26 和 0.18。