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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Structural and thermal characterization of ternary complexes of piroxicam and alanine with transition metals: Uranyl binary and ternary complexes of piroxicam - Spectroscopic characterization and properties of metal complexes
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Structural and thermal characterization of ternary complexes of piroxicam and alanine with transition metals: Uranyl binary and ternary complexes of piroxicam - Spectroscopic characterization and properties of metal complexes

机译：吡罗昔康和丙氨酸与过渡金属的三元配合物的结构和热表征：吡罗昔康的铀酰二元和三元配合物-金属配合物的光谱表征和性质

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摘要

Ternary Fe(III), Co(II), Ni(II), Cu(II), Zn(II) and UO2(II) complexes with piroxicam (Pir) drug (H2L1) and dl-alanine (Ala) (HL2) and also the binary UO2(II) complex with Pir were studied. The structures of the complexes were elucidated using elemental, IR, molar conductance, magnetic moment, diffused reflectance and thermal analyses. The UO2(II) binary complex was isolated in 1:2 ratio with the formula [UO2(H2L2](NO3)(2). The ternary complexes were isolated in 1:1:1 (M:H2L1:L-2) ratios. The solid complexes were isolated in the general formulae [M(H2L)(L-2)(Cl)(n)(H2O)(m)]center dot yH(2)O (M = Fe(III) (n = 2, m = 0, y = 1), Co(II) (n = 1, m = 1, y = 2) and Ni(II) (n = 1, m = 1, y = 0)); [M(H2L)(L-2)(X)(z)center dot yH(2)O (M = Cu(II) (X = AcO, z= 1, y = 0), Zn(II) (X = AcO, z = 1, y = 3) and UO2(II) (X = NO3, z = 1, y = 2)). Pir behaves as a neutral bidentate ligand coordinated to the metal ions via the pyridine-N and carbonyl-O groups, while Ala behaves as a uninegatively bidentate ligand coordinated to the metal ions via the deprotonated carboxylate-O and amino-N. The magnetic and reflectance spectral data show that the complexes have octahedral geometry except Cu(II) and Zn(II) complexes have tetrahedral structures. The thermal decomposition of the complexes was discussed in relation to structure, and the thermodynamic parameters of the decomposition stages were evaluated. (c) 2005 Elsevier B.V. All rights reserved.
机译：三元Fe（III），Co（II），Ni（II），Cu（II），Zn（II）和UO2（II）与吡罗昔康（Pir）药物（H2L1）和dl-丙氨酸（Ala）（HL2）的配合物还研究了与Pir的二元UO2（II）配合物。使用元素，红外，摩尔电导，磁矩，漫反射率和热分析阐明了配合物的结构。用公式[UO2（H2L2]（NO3）（2）分离1：2的UO2（II）二元配合物，以1：1：1（M：H2L1：L-2）的比例分离三元配合物。分离出固态配合物，通式为[M（H2L）（L-2）（Cl）（n）（H2O）（m）]中心点yH（2）O（M = Fe（III）（n = 2，m = 0，y = 1），Co（II）（n = 1，m = 1，y = 2）和Ni（II）（n = 1，m = 1，y = 0））; [M （H2L）（L-2）（X）（z）中心点yH（2）O（M = Cu（II）（X = AcO，z = 1，y = 0），Zn（II）（X = AcO ，z = 1，y = 3）和UO2（II）（X = NO3，z = 1，y = 2））。Pir表现为通过吡啶-N和羰基-O与金属离子配位的中性双齿配体磁性和反射光谱数据表明，除了Cu（II）和Zn（II）配合物外，该配合物具有八面体的几何形状，并且通过脱质子化的羧酸盐O和氨基N与金属离子配位。具有四面体结构，讨论了配合物的热分解与结构的关系，以及热评估了分解阶段的动力学参数。 （c）2005 Elsevier B.V.保留所有权利。

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