A series of binary phenothiazine based co-crystals were designed with the aim to reach materials with improved quantum efficiency in solid state. To this end, a host dibromine functionalized phenothiazine was mixed with a guest formyl based phenothiazine in various molar ratios, from 1:1 up to 1:9, to form single crystals and thin films as well. Single crystal X-ray diffraction, polarized light microscopy, ¹H NMR and FTIR spectroscopies indicated the successful formation of supramolecular synthons via halogen bonds. Polarized light microscopy and atomic force microscopy indicated the formation of submicrometric crystals into the co-crystal films. The photophysical behaviour was investigated by UV–vis and photoluminescence spectroscopies, and showed a remarkable improvement of the quantum yield, reaching values of 27% for single co-crystals and of 42% for thin films of nano-co-crystals.

设计了一系列基于二氮杂吩噻嗪的共晶体，旨在获得具有提高的固态量子效率的材料。为此，将主体二溴官能化的吩噻嗪与客体甲酰基基吩噻嗪以1：1至1：9的各种摩尔比混合，以形成单晶和薄膜。单晶X射线衍射，偏光显微镜，¹ H NMR和FTIR光谱表明，超分子合成子通过卤素键。偏光显微镜和原子力显微镜表明亚微米级晶体形成为共晶体膜。通过紫外可见光谱和光致发光光谱学研究了光物理行为，结果表明量子产率得到了显着提高，单个共晶体达到27％的值，纳米共晶体薄膜达到42％的值。