Abstract Via an oxidation reaction of Cu(I) iodide with pyridine-2,6-dicarboxylic acid (H2L) in DMF three copper(II) complexes, [(CH3)2NH2]2[CuL2] (1), K2[CuL2]∙H2L∙H2O (2) and [Cu(L)(H2O)]n (3), were synthesized and characterized. The structures of 1–3 were determined by single crystal X-ray diffraction studies. In-situ DMF decomposition produces dimethylamine base under solvothermal conditions and
Kinetic study of the thermal dehydration of copper(II) dipicolinates: Crystal and molecular structure of Cu(II) (Pyridine 2,6-Dicarboxylato) DI- and Trihydrated
作者:E.E. Sileo、G. Rigotti、B.E. Rivero、M.A. Blesa
DOI:10.1016/s0022-3697(96)00237-5
日期:1997.7
Abstract As a basis for the description of dehydration mechanisms, the molecular structures of two copper(II) dipicolinates, Cu(dipic).2H2O (triclinic) and Cu(dipic).3H2O, are presented and compared with those of other copper(II) dipicolinates. The kinetics of the isothermal dehydration of the monoclinic and triclinic polymorphs of Cu(dipic).2H2O were measured. The monoclinic variety dehydrates in
Heterometallic coordination compounds of dipicolinic acid with Ce(III,IV) and Cu(II): Synthesis, crystal structure and spectral studies
作者:T.K. Prasad、M.V. Rajasekharan
DOI:10.1016/j.ica.2010.03.070
日期:2010.10
6-dicarboxylic acid (dipicH2) with ammonium ceric nitrate and Cu(II) salts yielded three heterometallic compounds all of which contain [Ce(dipic)3]2− linked to aquo-Cu(II) complex units. Part of the Ce(IV) gets reduced by solvent during the reaction leading to [(Ce(dipic)3Ce(H2O)8)2Cu(H2O)4][Ce(dipic)3]2·12H2O (1). Other lanthanide(III) ions could take the place of Ce(III) as demonstrated by the preparation
Ultrasound assisted facile synthesis of Mn(II) and Cu(II) coordination polymers and their use as precursors for α-Mn3O4 and CuO nanoparticles: Synthesis, characterization and catalytic properties
作者:Mohamed I. Said、Asma I. El-Said、Aref A.M. Aly、Asia Abou-Taleb
DOI:10.1016/j.ultsonch.2018.04.001
日期:2018.9
and 2 in air at 600 °C. Transmission electron microscopy (TEM) reveals a sphere-like morphology for the Mn3O4 nanoparticles. Shrinkage of the particle size from 90 nm (by conventional synthesis of the precursor) to 19 nm (ultrasonic-assisted) takes place, indicating the great effect of ultrasonication. CuO nanoparticles were of semispherical (conventional and ultrasonic-assisted methods) and hexagonal
Pyridine-Substituted Oligopeptides as Scaffolds for the Assembly of Multimetallic Complexes: Variation of Chain Length
作者:Kristi Ohr、Brian P. Gilmartin、Mary Elizabeth Williams
DOI:10.1021/ic050769i
日期:2005.10.1
determined and were found to decrease with increasing pyridineunits. Titrations of the oligopeptides with Cu(II) and Pt(II) complexes containing the tridentateligands 2,2':6',2''-terpyridine and pyridine 2,6-dicarboxylic acid were monitored using UV-visible absorption spectroscopy and showed stoichiometric binding based on the number of pyridines on the peptide strand. Metal titrations performed using
本文介绍了具有不同长度的氨基乙基甘氨酸骨架的吡啶取代的人工寡肽的合成和表征,其被设计用作多金属结构自组装的支架。寡肽的身份和纯度通过质谱,(1)1 H NMR,HPLC和pH滴定法确认。测定了寡肽的酸解离常数,发现其随吡啶单元的增加而降低。使用紫外可见吸收光谱法监测含有三齿配体2,2':6',2''-吡啶和吡啶2,6-二羧酸的Cu(II)和Pt(II)配合物的寡肽滴定基于肽链上吡啶的数目的化学计量结合。使用具有甲基取代基(代替吡啶配体)的类似寡肽进行的金属滴定显示非常弱或没有结合。在含有结合的Pt(terpyridine)(2+)配合物的寡肽的情况下,循环伏安法显示在形式电位上有两个连续的单电子还原,其不随寡肽长度的变化而变化。测得的扩散系数用计时安培法测量,发现随着寡肽长度的增加而降低。