On November 30, 2019, Liu, Jin-jian; Li, Jing published an article.Reference of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide The title of the article was Photochromism of stable crystalline 3D Cd-viologen coordination polymers. And the article contained the following:
Recent studies have demonstrated the efficient synthesis of photochromic coordination polymers by assembly of viologens and metal centers. In order to enrich this system, in-depth research should be conducted on the impact of metal centers, but related research is rare. On the basis of two photochromic viologen-based compounds, two new photochromic coordination polymers are prepared by introducing cadmium ions. In this study, four novel host-guest compounds based on viologen cations (EV2+ = 1,1′-bis(ethyl)-4,4′-bipyridinium dication, PV2+ = 1,1′-bis(propyl)-4,4′-bipyridinium dication) and 1,3,5-benzenetricarboxylic acid (H3BTC) have been synthesized and structurally characterized, [(EV)0.5(H2BTC)]·H2O (1), [(PV)(H2BTC)2]·2H2O (2), {(EV)0.5[Cd(BTC)(H2O)]·2H2O}n (3), {(PV)0.5[Cd(BTC)(H2O)]·2H2O}n (4). Compounds 1 and 2 feature the isolated structure, where uncoordinated H2BTC- units connect to viologen cations by supramol. interactions. Compounds 3 and 4 feature the three-dimensional (3D) anionic MOFs of {[Cd(BTC)(H2O)]-}n with viologen cations inserted in the framework. As expected, incorporating the viologen fragment into the framework results in predefined photochromism of four compounds It is worth noting that the introduction of cadmium ions will directly improve the photosensitive behaviors and protect the photo-generated radicals. The experimental process involved the reaction of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide(cas: 52243-87-5).Reference of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide
The Article related to alkylbipyridinium benzenetricarboxylate viologen cadmium coordination polymer preparation photochromism structure, crystal mol structure cadmium viologen coordination polymer, photochromism alkylbipyridinium benzenetricarboxylate viologen cadmium coordination polymer and other aspects.Reference of 1,1′-Dipropyl-[4,4′-bipyridine]-1,1′-diium bromide