Four organic-inorganic compounds based on polyoxometalates: crystal structures and catalytic epoxidation of styrene was written by Wang, Chunling;Ren, Yuanhang;Feng, Sujiao;Kong, Zuping;Hu, Yichen;Yue, Bin;Deng, Mingli;He, Heyong. And the article was included in Journal of Coordination Chemistry in 2014.Related Products of 15420-02-7 This article mentions the following:
Four compounds based on polyoxometalates, [Cu(4-bpo)(H2O)][Cu2(μ2-Cl)(4-bpo)2(H2O)][SiW12O40][NMe4]2·H2O (1), [Cu(4-bpo)]4[P2W18O62][NMe4]2·6H2O (2), [Cu2(μ2-OH)(4-bpo)2(Hina)(H2O)2]2[P2W18O62]·4H2O (3), and [Cu2(Hina)4(H2O)2][H2P2W18O62](Hina)·11H2O (4) (4-bpo = 2,5-bis(4-pyridyl)-1,3,4-oxadiazole, ina = isonicotinic acid), were hydrothermally synthesized and characterized by elemental anal., IR, and single-crystal x-ray diffraction. The 3-dimensional framework of 1 is composed by Keggin-type polyoxoanions {SiW12} and two types of infinite chains, {Cu(4-bpo)(H2O)}n and {Cu2(μ2-Cl)(4-bpo)2(H2O)}n, through H bonds. Compound 2 has a 3-dimensional rigid framework which is fabricated by Wells-Dawson type polyoxoanions {P2W18} and Cu-(4-bpo) chains through covalent bonds. Compound 3 contains an infinite {Cu2(μ2-OH)(4-bpo)2(Hina)(H2O)2}n double-chain and {P2W18} polyoxoanions immobilized in the voids between the chains. Compound 4 exhibits a 3-dimensional supramol. network directed by H bonds between {P2W18} polyoxoanions and the double paddle-wheel {Cu2(Hina)4(H2O)2}. Compounds 1–4 were tested as heterogeneous catalysts for the epoxidation of styrene using tert-Bu hydroperoxide (TBHP) as oxidant. The compounds show catalytic activity with 2 giving the highest yield of styrene oxide. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Related Products of 15420-02-7).
2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Related Products of 15420-02-7