Spectral and thermal characteristics of copper(II) carboxylates with fatty acid chains and their benzothiazole adducts
作者:M. Pajtášová、D. Ondrušová、E. Jóna、S. C. Mojumdar、S. L’alíková、T. Bazyláková、M. Gregor
DOI:10.1007/s10973-010-0769-x
日期:2010.6
carboxylato–Cu(II) complexes of type [Cu2(RCOO)4] and their benzothiazole adducts [Cu2(RCOO)4bt2] (bt = benzothiazole, R = CH3(CH2)n−2, n = 12, 14, 16, 18) form the main objectives of this study. The studied carboxylato–Cu(II) complexes are formed from dimeric units to polymeric chains (chromofor CuO5). The structural changes are due to coordination of ligand (benzothiazole). The polymeric chains of carboxylato–Cu(II)
Crystal structures and mesomorphic properties of Schiff base homologs and derivatives, and magnetic properties of their dimeric and dinuclear copper(II) complexes
作者:Norbani Abdullah、Yanti Yana Halid、Tee Jia Ti、Afiq Azil
DOI:10.1080/15421406.2015.1044695
日期:2016.1.2
mesomorphisms, while the derivative was not mesomorphic and did not reform crystals from its melt. Copper(II) complexes of H2L1, H2L2 and H2L4 were dimeric, while that of H2L3 was dinuclear with chelating CH3COO ligand. These complexes were paramagnetic with insignificant interactions between the copper(II) atoms and have high decomposition temperatures (Tdec = 268–304°C). Their melting temperatures (Tmelt
Characterisation of metal carboxylates by Raman and infrared spectroscopy in works of art
作者:Vanessa Otero、Diogo Sanches、Cristina Montagner、Márcia Vilarigues、Leslie Carlyle、João A. Lopes、Maria J. Melo
DOI:10.1002/jrs.4520
日期:2014.11
paintings were used, including lead, zinc, calcium, cadmium, copper and manganese. The fatty acids selected were the saturated acids palmitic (C16 : 0) and stearic (C18 : 0) and the polyunsaturated oleic acid (C18 : 1). Azelaic acid (C9 diacid), a product resulting from autoxidation of polyunsaturated acids, was also included. Metal carboxylates were characterised by Raman and IR spectroscopy, and their
The thermal behaviour and spectral properties of some long chain copper(II) carboxylates
作者:Hugh D. Burrows、Henry A. Ellis
DOI:10.1016/0040-6031(82)85190-3
日期:1982.1
Abstract Results are presented on the temperatures, enthalpies, and entropies of the phase transitions of the even chain length copper(II) carboxylates from decanoate to octadecanoate. The dodecanoate, tetradecanoate and hexadecanoate melt directly from crystal to isotropic liquid. However, with the decanoate and octadecanoate, an intermediate phase is observed between solid and isotropic liquid. Tentative
摘要 给出了偶数链长羧酸铜 (II) 从癸酸到十八酸的相变的温度、焓和熵的结果。十二酸、十四酸和十六酸直接从晶体熔化成各向同性液体。然而,对于癸酸酯和十八酸酯,在固体和各向同性液体之间观察到中间相。对中间阶段进行了初步分配。报告了固体羧酸铜 (II) 的电子和红外光谱。在这两种情况下,光谱都提供了清晰的证据,证明每个羧酸铜系统的头基区域中至少有两个铜离子。
Enhanced thermal, safety and anti-hygroscopicity performance of core–shell ammonium perchlorate with a double coating layer
The AP/Cu-DABT/Cu(Pa)2 composite with a double-layer core–shell structure has a lower HTD peak temperature and activation energy, higher heat release, burning rate and temperature, better anti-hygroscopic performance and safety performance than AP.
与 AP 相比,具有双层核壳结构的 AP/Cu-DABT/Cu(Pa)2 复合材料具有更低的 HTD 峰值温度和活化能,更高的放热率、燃烧速率和温度,更好的抗吸湿性能和安全性能。