[EN] RESISTIVE MEMORY DEVICES BASED ON METAL COORDINATED REDOX ACTIVE LIGANDS [FR] DISPOSITIFS À MÉMOIRE RÉSISTIVE BASÉS SUR DES LIGANDS À ACTIVITÉ REDOX COORDONNÉS À UN MÉTAL
Abstract Herein a new Ru-phosphine complex (1) with molecular formula [RuL(PPh3)Cl2] is reported where L is a redox active pincer ligand 2,6-bis(phenylazo)pyridine. The isolated complex has been characterized by usual spectroscopic techniques including single crystal X-ray crystallographic analysis. Complex 1 efficiently catalyzes aerobic oxidation of a wide range of primary and secondary benzylic
Exclusively Ligand-Mediated Catalytic Dehydrogenation of Alcohols
作者:Debabrata Sengupta、Rameswar Bhattacharjee、Rajib Pramanick、Santi Prasad Rath、Nabanita Saha Chowdhury、Ayan Datta、Sreebrata Goswami
DOI:10.1021/acs.inorgchem.6b01310
日期:2016.10.3
liquid fuels like alcohols is described in this report. The catalyst is a nickel(II) complex of 2,6-bis(phenylazo)pyridine ligand (L), which possesses the above requisite with excellent catalytic efficiencies for controlled dehydrogenation of alcohols using ligand-based redox couple. Mechanistic studies supported by densityfunctional theory calculations revealed that the catalytic cycle involves hydrogen
本报告介绍了一种高效的新型催化剂的设计,该催化剂可以模拟酶催化液体燃料(如醇)的脱氢途径。该催化剂是2,6-双(苯基偶氮)吡啶配体(L)的镍(II)配合物,具有上述要求,并具有优异的催化效率,用于使用基于配体的氧化还原对控制醇的脱氢。密度泛函理论计算所支持的机理研究表明,催化循环涉及通过量子机械隧穿进行的氢原子转移,在300 K时具有显着的k H / k D同位素效应,为12.2±0.1。氢化中间体化合物[Ni II Cl 2(H 2个L)],经分离和表征。该结果在设计廉价且有效的用于乙醇氧化和氢存储的富含地球的金属催化剂的背景下是有希望的。
An Azoaromatic Ligand as Four Electron Four Proton Reservoir: Catalytic Dehydrogenation of Alcohols by Its Zinc(II) Complex
Zn(II) serves as an oxophilic Lewisacid, while the ligand behaves as efficient storage of electron and proton. Synthesis, X-ray structure, and spectral characterizations of the catalyst, ZnLCl2 (1a) along with the two hydrogenated complexes of 1a, ZnH2LCl2 (1b), and ZnH4LCl2 (1c) are reported. It has been argued that the reversible azo-hydrazo redox couple of 1a controls aerobic dehydrogenation of alcohols
Introducing a New Azoaromatic Pincer Ligand. Isolation and Characterization of Redox Events in Its Ferrous Complexes
作者:Pradip Ghosh、Subhas Samanta、Suman K. Roy、Serhiy Demeshko、Franc Meyer、Sreebrata Goswami
DOI:10.1021/ic500355f
日期:2014.5.5
irreversible cathodic response at −0.98 V, the bis-chelate [2]ClO4 undergoes a reversible one-electron oxidation at 0.54 V and three successive reversible one-electron reductions at −0.18, −0.88, and −1.2 V, all occurring at the ligands without affecting the metal ion oxidation state. The electronic structures of the parent monocationic complex [2]+ and its oxidized and reduced forms, generated by exhaustive
Ruthenium(II) Complex of a Tridentate Azoaromatic Pincer Ligand and its Use in Catalytic Transfer Hydrogenation of Aldehydes and Ketones with Isopropanol
length (1.29 Å) is attributed to the extensive π-back bonding, dπ(RuII)→π*(azo)L. The complex [1](ClO4)2 acts as an efficient catalyst, which brings about catalytic transfer hydrogenation reactions of a broad array of aldehydes and ketones in isopropanol and in inert conditions. The selectivity of the catalyst for aldehyde reduction over the other reducible functional groups such as nitro, nitrile, ester