Bis(diphenylphosphanyl) bi(benzofurano) (BBFP) and Bis(diphenylphosphanyl) bi(benzothiophene) (BBTP) were synthesized by the reaction of dilithio(benzothienylbenzofuran) or dilithio(benzothienylbenzothiophene) with Diphenylphosphinic chloride, then reduced with trichlorosilane to afford the target. Optical and electrochemical measurements of the products and their DFT calculations revealed that P⋯O noncovalent conformational locks played an important role in constructing highly planar BBFP, while BBTP showed a distorted structure. As a result, the photoluminescence (PL) quantum yields of BBFP measured as solids were 0.25. In contrast, the PL quantum yields of BBTP was too low to be detected.

通过二硫代（苯并噻吩基苯并呋喃）或二硫代（苯并噻吩基苯并噻吩）与二苯基次膦酰氯的反应合成双（二苯基膦基）双（苯并呋喃基）（BBFP）和双（二苯基膦基）双（苯并噻吩基）（BBTP），然后用三氯硅烷还原得到目标化合物。产物的光学和电化学测量及其DFT计算表明，P⋯O非共价构象锁在构建高度平面的BBFP中起重要作用，而BBTP显示出扭曲的结构。结果，以固体测量的BBFP的光致发光（PL）量子产率为0.25。相反，BBTP的PL量子产率太低而无法检测。