Zheng, Shuyuan; Han, Jianlei; Jin, Xue; Ye, Qiang; Zhou, Jin; Duan, Pengfei; Liu, Minghua published an article in 2021. The article was titled 《Halogen Bonded Chiral Emitters: Generation of Chiral Fractal Architecture with Amplified Circularly Polarized Luminescence》, and you may find the article in Angewandte Chemie, International Edition.Synthetic Route of C7H5N The information in the text is summarized as follows:
Self-assembled chiroptical materials have attracted considerable attention due to their great applications in wide fields. During the chiral self-assembly, it remains unknown how achiral mols. can affect the assembly process and their final chiroptical performance. Herein, the authors report an achiral mol. directed chiral self-assembly via halogen bonds, exhibiting not only an unprecedented chiral fractal architecture but also significantly amplified circularly polarized luminescence (CPL). Two axially chiral emitters with halogen bond sites co-assemble with an achiral 1,4-diiodotetrafluorobenzene (F4DIB) and well-ordered chiral fractal structures with asymmetry amplification are obtained. The enhancement of the dissymmetry factors of the assemblies was ≤0.051 and ≤0.011, which was ∼100 folds than those of the corresponding mols. Both the design of the chiral emitter and the highly directional halogen bond played an important role in hierarchically chirality transfer from chiral emitters to the micrometer scale chiral fractal morphol. and amplified dissymmetry factors. The authors hope that this strategy can give a further insight into the fabrication of structurally unique featured highly efficient chiroptical materials. The experimental part of the paper was very detailed, including the reaction process of 4-Ethynylpyridine(cas: 2510-22-7Synthetic Route of C7H5N)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridines form stable salts with strong acids. Pyridine itself is often used to neutralize acid formed in a reaction and as a basic solvent. Synthetic Route of C7H5N