Preparation and thermal dehydration of manganese(II) dicarboxylate hydrates
作者:Yukihiko Suzuki
DOI:10.1016/0040-6031(94)02132-8
日期:1995.5
analysis and IR spectral measurement. The thermaldehydrations of the Mn(II) dicarboxylate hydrates were investigated by TG-DTA. The temperatures at which dehydration occurred were taken as a measure of the strength of the MnOH 2 bond, and these were found to vary with increasing number of CH 2 groups in the dicarboxylic acid. The kinetic parameters for the dehydration were calculated by employing a computation
摘要 通过将MnCO 3 粉末或浓MnSO 4 溶液加入到相应二羧酸的水溶液中,制备了二羧酸锰(II)水合物Mn[OOC(CH 2 ) n COO] · x H 2 O。通过光学显微镜观察沉淀化合物的晶型。获得的晶体为椭圆形、短棒状或非常小的不均匀颗粒。晶体不同于二羧酸的晶体。获得的二羧酸盐通过 X 射线衍射分析和红外光谱测量进行表征。通过TG-DTA研究了Mn(II)二羧酸盐水合物的热脱水。脱水发生的温度被视为衡量 MnOH 2 键强度的指标,并且发现这些随着二羧酸中CH 2 基团数量的增加而变化。脱水的动力学参数采用计算方法计算。发现三维扩散模型最适合描述主反应的动力学结果。
A comparative study on the thermal decomposition of some transition metal carboxylates
作者:B. S. Randhawa、K. Gandotra
DOI:10.1007/s10973-005-7120-y
日期:2006.8
Thermal decomposition of transitionmetal malonates, MCH2C2O4⋅ x H2O and transitionmetal succinates, M(CH2)2C2O4⋅ x H2O ( M =Mn, Fe, Co, Ni, Cu, Zn) has been studied employing TG, DTG, DTA, XRD, SEM, IR and Mössbauer spectroscopic techniques. After dehydration, the anhydrous metal malonates and succinates decompose directly to their respective metal oxides in the temperature ranges 310–400 and 400–525°C
过渡金属丙二酸盐的热分解,MCH 2 Ç 2 ö 4 ⋅ X ħ 2 O和过渡金属琥珀酸盐,M(CH 2)2 c ^ 2 Ò 4 ⋅ X ħ 2 O( 中号 通过TG,DTG,DTA,XRD,SEM,IR和Mössbauer光谱技术研究了Mn,Fe,Co,Ni,Cu,Zn)。脱水后,无水金属丙二酸酯和琥珀酸酯分别在310-400和400-525°C的温度范围内直接分解成各自的金属氧化物。已经发现获得的氧化物是纳米级的。已经发现琥珀酸酯的热稳定性高于相应的丙二酸酯的热稳定性。
Laser coding
申请人:Khan Nazir
公开号:US20050269304A1
公开(公告)日:2005-12-08
A method for marking an object, wherein the object comprises a material including a functional group and a metal compound or acid that causes an elimination reaction on irradiation with a laser, to form a reaction product of contrasting colour, comprises directing a laser beam on to the areas of the object to be marked For example, by using a carbohydrate and a metal salt, effective marking can be achieved on the coating of a pill or other edible material.
Supramolecular assemblies and magnetic behaviors of the M(II)/p-aminopyridine/malonate (M=Ni, Mn, Cu, Co) systems
作者:Ronaldo J. Fernandes、Regina C.G. Frem、Patrícia B. da Silva、Rafael S. Freitas、Patrícia Silva、José A. Fernandes、João Rocha、Filipe A. Almeida Paz
DOI:10.1016/j.poly.2013.03.038
日期:2013.7
The coordination compounds [Ni(mu-mal)(apy)(2)(H2O)]center dot 2.8H(2)O (1), [Mn(mu-mal)(H2O)(2)] (2), (apyH)(2)[Cu(mu-mal)(2)] (3) and (apyH)(2)[Co(mal)(2)(H2O)(2)] (4) (mal = malonate, apy = p-aminopyridine) have been synthesized and characterized by elemental analysis, vibrational spectroscopy, single crystal X-ray diffraction and magnetometry. With exception of 4, the malonate group acts as bridging ligand leading to the formation of one-dimensional polymeric chains. In compound 1 it was observed the coordination of the p-aminopyridine in the axial positions of the distorted octahedral coordination sphere. The solid-state structure exhibits a high complex 3D network formed by several supramolecular interactions. Magnetic properties were determined for all members of the series and indicate that the materials behave are normal paramagnets, except the Mn polymer 2 which exhibits an antiferromagnetic ground state. (C) 2013 Elsevier Ltd. All rights reserved.
Al-Najar, Anis A.; Ibrahim, Awatif M., Canadian Journal of Chemistry, 1990, vol. 68, # 5, p. 770 - 773