On June 28, 2019, Liu, Jinjian; Li, Jing published a patent.COA of Formula: C16H22Br2N2 The title of the patent was Two photochromic purpurine host-object MOFs material, and its preparation method and application. And the patent contained the following:
The inventive purpurine host-object MOFs material has formula of (EV)2/n[Cd(BTC)(H2O)]n·2nH2O or (PV)2/n[Cd(BTC)(H2O)]n·2nH2O, wherein EV2+ is 1,1-di(ethyl)-4,4-bipyridyl cation, and PV2+ is 1,1-di(propyl)-4,4-bipyridyl cation. One preparation method includes (1) adding 4,4-bipyridine and Et bromide in anhydrous acetonitrile, heating under reflux for 24 h, cooling, filtering, and washing to obtain 1,1-di(ethyl)-4,4-bipyridyl bromide; (2) dissolving with cadmium nitrate in deionized water; (3) dissolving 1,3,5-trimesic acid and NaOH in deionized water under heating; (4) mixing with solution of step (2), standing for 5 d, washing, and drying. The invention is simple and easy to operate, economical and non-toxic. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).COA of Formula: C16H22Br2N2
The Article related to bipyridinium cadmium trimesate mof preparation crystal structure photochromism, Inorganic Chemicals and Reactions: Coordination Compounds and other aspects.COA of Formula: C16H22Br2N2