17274-18-9Relevant articles and documents
Dimeric paddle-wheel carboxylates of copper(II): Synthesis, crystal structure and electrochemical studies
Iqbal, Muhammad,Ahmad, Iqbal,Ali, Saqib,Muhammad, Niaz,Ahmed, Safeer,Sohail, Manzar
, p. 524 - 531 (2013)
The reaction of the sodium salt of para substituted phenyl acetic acid with CuSO4 in water and subsequent treatment with pyridine gives binuclear centro-symmetric complexes pyCu(R-C6H4CH 2COO)4Cupy, where R = 4-OMe (1) and 4-Cl- (2). The structures of both complexes were solved by X-ray single crystal analysis. The frame of the complexes is constructed as a dimeric 'paddle-wheel' with four carboxylate bridges. The apical position is occupied by a pyridine ligand and there is a Cu-Cu bond as well. The compounds demonstrated one-electron redox behavior and their peak currents were found to increase linearly with the square root of the sweep rate (ν1/2). The overall electrode processes were found to be activation plus diffusion controlled. The values of the formal potential (E ?), diffusion coefficient (D) and heterogeneous rate constant (k°) were evaluated for the electroreduction process for both the compounds.
Dual investigation of lanthanide complexes with cinnamate and phenylacetate ligands: Study of the cytotoxic properties and the catalytic oxidation of styrene
Aragón-Muriel, Alberto,Camprubí-Robles, María,González-Rey, Elena,Salinas-Castillo, Alfonso,Rodríguez-Diéguez, Antonio,Gómez-Ruiz, Santiago,Polo-Cerón, Dorian
, p. 117 - 128 (2014/08/18)
Eleven lanthanide compounds [Y(cinn)3] (1), [La(cinn) 3] (2), [La(4-OMecinn)3]·2H2O (3), [La(4-Clcinn)3]·2H2O (4), [La(4-OMephac) 3]·4H2O (5), [La(4-Clphac)3] ·3H2O (6), [Ce(cinn)3] (7), [Nd(cinn)3] (8), [Sm(cinn)3]·H2O (9), [Yb(cinn)3] (10) and [Sm(4-OMephac)3]·H2O (11) containing carboxylato ligands (cinn = cinnamate; 4-OMecinn = 4-methoxicinnamate; Clcinn = 4-chlorocinnamate; 4-OMephac = 4-methoxyphenylacetate; 4-Clphac = 4-chlorophenylacetate) have been synthesized and characterized by elemental analysis, IR, 1H and 13C NMR spectroscopy, thermal analysis and X-ray diffraction powder patterns. In addition, compound 11 was characterized by single crystal X-ray diffraction studies. The cytotoxic activity of these complexes has been tested against three different human tumour cell lines HL60 (human promyelocytic leukemia), K562 (human erythromyeloblastoid leukemia) and MCF7 (breast cancer), observing a very modest cytotoxic activity for all tested compounds. In addition, toxicity tests to macrophages and erythrocytes have also been carried out, observing that none of the compounds is toxic against these immunocompetent cells. Finally, all the synthesized compounds have been tested as catalysts for styrene oxidation observing conversions higher than 50% after 19 h of reaction as well as a relatively high selectivity to two main products benzaldehyde (BzA) and 1-phenylethane-1,2-diol (PhED). Complex 7 presents the higher conversion (99.56%) with a relatively high selectivity towards PhED of 72.07%.