Zhang, Fulin; Li, Xia; Dong, Xiaoyun; Hao, Huimin; Lang, Xianjun published the artcile< Thiazolo[5,4-d]thiazole-based covalent organic framework microspheres for blue light photocatalytic selective oxidation of amines with O2>, Safety of 4-Bromobenzylamine, the main research area is covalent organic framework microsphere photocatalysis.
Covalent organic frameworks (COFs) with photoactive units have attracted significant interest in visible light photocatalysis and can present a metal-free scenario for activating O2. As a typical photoactive unit, thiazolo[5,4-d]thiazole (TzTz) has rarely been added to COFs. However, circumventing the low reversibility of TzTz, it could be embedded into the building blocks beforehand, along with other bonds like β-ketoenamine in forming COFs. TzTz was embedded into 1,1′-biphenyl-4,4′-diamine (BD) using this approach to produce 4,4′-(TzTz-2,5-diyl)dianiline (DTz). Under organobase-modulated solvothermal conditions, combining 1,3,5-triformylphloroglucinol (Tp) with BD and DTz resulted in the production of β-ketoenamine-linked TpBD-COF and TpDTz-COF. Both TpDTz-COF and TpBD-COF are microspheres. TpDTz-COF possessed more adequate separation and charge migration than TpBD-COF. This resulted in superior performance for the blue light photocatalytic selective oxidation of benzylamine with O2. Furthermore, with O2 as the main oxidant, a wealth of benzylamines could be converted into imines over TpDTz-COF. Mechanistic investigations substantiate that oxidation of benzylamines obeys an electron transfer pathway, in which superoxide anion (O•-2) is the crucial reactive oxygen species. This study highlights the superiority of TzTz-embedded COFs in developing effective photocatalytic systems for organic transformations.
Chinese Journal of Catalysis published new progress about Covalent organic frameworks. 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Safety of 4-Bromobenzylamine.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary