886-08-8Relevant articles and documents
Phenoxy imine substituted ruthenium complex as well as preparation and application thereof
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Paragraph 0076-0080, (2020/11/23)
The invention relates to a phenoxy imine substituted ruthenium complex as well as preparation and application thereof, and the chemical general formula of the ruthenium complex is shown in the specification, in the formula, R1 is C1-C20 alkyl with a linear, branched or cyclic structure, or C7-C30 mono-or polyaryl substituted alkyl; R2 - R5 are respectively and independently hydrogen, or nitro, orC1-C20 straight-chain and branched-chain alkyl, or C7-C30 monoaryl or polyaryl substituted alkyl, or C6-C18 aryl, or halogen. Compared with the prior art, the method has the advantages that the effectof double-component catalysis can be achieved, polymerization starting can be effectively controlled, industrial operation is facilitated. Meanwhile, the catalyst has the advantages of being resistant to water, oxygen and impurities. In addition, phenoxy imine ligands are easy to synthesize, steric hindrance and the electronic effect of ligand substituents are easy to adjust, and the method is suitable for industrial production. The catalytic activity of ruthenium in a metal center can be effectively regulated and controlled, so that the catalyst is effectively regulated and controlled.
Inclusion of Peripheral Basic Groups Activates Dormant Cobalt-Based Molecular Complexes for Catalytic H2 Evolution in Water
Khandelwal, Shikha,Zamader, Afridi,Nagayach, Vivek,Dolui, Dependu,Mir, Ab Qayoom,Dutta, Arnab
, p. 2334 - 2344 (2019/02/27)
The protein scaffold plays a key role during the enzymatic catalysis for metalloenzymes. Here we have rationally designed an enzyme-inspired outer coordination sphere in the form of protic functionalities, such as natural amino acid derived carboxylic acid and phenolic -OH groups, on the fringe of the cobalt-salen like complexes. This inclusion has enabled electrocatalytic H2 evolution for an otherwise inactive cobalt-salen like core. The complexes containing peripheral carboxylic acid groups exhibited unique pH-switchable catalytic H2 production that is connected with the pKa of the carboxylic acid group (~4.0), suggesting the crucial involvement of the carboxylate group during the catalytic activity. The one- and two-dimensional NMR results of the complexes have indicated the presence of a possible hydrogen bonding network, generated by those protic groups in aqueous solution. These results highlight that an inactive metal complex can be activated for specific small molecule activation via rational inclusion of outer coordination sphere functionalities.
Syntheses, structures and catalytic properties of ruthenium(II) nitrosyl complexes with bidentate and tetradentate Schiff base ligands
Wu, Fule,Wang, Chang-Jiu,Lin, Hui,Jia, Ai-Quan,Zhang, Qian-Feng
, p. 718 - 723 (2017/12/26)
Treatment of Ru(NO)Cl3·xH2O with 1 equiv. bidentate Schiff bases in the presence of triethylamine in DMF/THF afforded a series of anionic ruthenium(II) nitrosyl complexes of the type [Et3NH][Ru(κ2-N,O-LR)(NO)Cl3] (HLR = 2-butyliminomethyl-phenol 1, 2-(benzylimino-methyl)-phenol 2, 2-[(4-chloro-phenylimino)-methyl]-phenol 3, 2-[(4-nitro-phenylimino)-methyl]-phenol 4, 2-[(2,6-diisopropyl-phenylimino)-methyl]-phenol 5). Interaction of Ru(NO)Cl3·xH2O and 1 equiv. tetradentate Schiff bases under the same condition led to isolation of an anionic complex [Et3NH][Ru(κ2-N,O-L-CH2CH2-NOH)-(NO)Cl3] (HL-CH2CH2-NOH = N,N′-disalicylidene-1,2-ethanediamine 6) and a neutral complex [Ru(salen-phn)(NO)Cl] (H2salen-phn = N,N′-disalicylidene-1,2-phenyldiamine 7). The molecular structures of 1·?C2H5OH, 2–6, and 7·CH2Cl2 have been determined by single-crystal X-ray crystallography. Investigation of the catalytic properties of ruthenium(II) nitrosyl complexes 1–7 showed that they are efficient catalytic precursors for the transfer hydrogenation of acetophenone.