Water wire clusters in isostructural Cu(II) and Ni(II) complexes: Synthesis, characterization, and thermal analyses
Water wire clusters in isostructural Cu(II) and Ni(II) complexes: Synthesis, characterization, and thermal analyses
复制标题
DOI：
10.1016/j.ica.2019.04.012
复制
发表时间：
2019-06
影响因子：
2.8
通讯作者：
N. Saraei;O. Hietsoi;Brian C. Frye;Alexander J. Gupta;M. Mashuta;Gautam Gupta;R. M. Buchanan;C. Grapperhaus
中科院分区：
文献类型：
--
作者：
N. Saraei;O. Hietsoi;Brian C. Frye;Alexander J. Gupta;M. Mashuta;Gautam Gupta;R. M. Buchanan;C. Grapperhaus
众所周知，氢键（HB）相互作用会影响本体水和水合材料的性质。最值得注意的是，一维水线参与质子和水的传输。因此，在成本和性能方面高效质子导体的设计和合成是非常感兴趣的。本文合成了N，N '-（乙烷-1，2-二基）双（1-甲基-1H-咪唑-2-甲酰胺）（H2 L）的Cu（II）和Ni（II）同结构配合物，并通过单晶X射线衍射、光谱和热分析对其进行了表征。两种配合物均属于单斜晶系，空间群为P21/c。1和2的不对称单元含有2当量的CuL或NiL和4分子的水合水。在两种配合物的固态堆积中，扩展的氢键（HB）网络形成沿着晶向b轴的一维螺旋状Z字形水链。对于这两种配合物，相同的配体框架，配位几何形状，和固态包装的结果形成类似的HB膨胀图案，这导致在高温下类似的热稳定性和相变。
Hydrogen bonding (HB) interactions are well known to impact the properties of bulk water and within hydrated materials. Most notably, 1D water wires are involved in proton and water transport. Therefore, the design and synthesis of efficient proton conductors in terms of cost and performance are of great interest. In this work, isostructural Cu(II) and Ni(II) complexes based onN,N'-(ethane-1,2-diyl)bis(1-methyl-1H-imidazole-2-carboxamide) (H2L) have been synthesized and fully characterized by single crystal X-ray diffraction, spectroscopic methods, and thermal analysis. Both complexes crystalize in the monoclinic space groupP21/c. The asymmetric unit of1and2contain two equivalents of CuL or NiL and four molecules of water of hydration. In the solid state packing of both complexes, the extended hydrogen bonding (HB) networks form 1D coiled zig-zag chains of water along the crystallographicb-axis. For both complexes, the identical ligand framework, coordination geometries, and solid state packing result in formation of similar HB expansion motifs, which result in analogous thermal stabilities and phase transitions at elevated temperature.