Lin, Na; Huang, Lei; Ding, Huan-huan; Zhang, Yue; Dong, Wen-jing; Xia, Bin-yuan; Ren, Wen-sheng; Zhao, Dong published their research in Organic Chemistry Frontiers in 2021. The article was titled 《Synthesis of para-linked azacalix[n]pyridine[n]pyrazines and their uranyl ion binding properties》.Application of 626-05-1 The article contains the following contents:
Based on the fragment coupling strategy, the novel macrocycles, para-linked azacalix[n]pyridine[n]pyrazines (n = 2 and 4) with coexisting different heteroaromatics, were synthesized readily starting from 2,5-dibromopyrazine and 2,6-dibromopyridine. According to the X-ray diffraction anal., the macrocycle azacalix[4]pyridine[4]pyrazine adopted a unique boat-type conformation with a large rectangular cavity in the solid state. The complexation between the azacalix[n]pyridine[n]pyrazines and uranyl ions was investigated by DFT calculations and 1H NMR and UV-vis titration experiments It was found that they were strong host mols. to form 1 : 1 complexes with uranyl ions with an association constant of up to (1.38 +/= 0.04) x 105 M-1. After reading the article, we found that the author used 2,6-Dibromopyridine(cas: 626-05-1Application of 626-05-1)
2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.Application of 626-05-1