首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Preparation,crystal structure,and physical characterization of a new hybrid material (C5H9N3)ZnCl4·H2O
Abstract:An organic–inorganic hybrid compound (C5H9N3)ZnCl4 · H2O was synthesized by slow evaporation and characterized by single-crystal X-ray diffraction, differential scanning calorimetry, thermogravimetry, temperature-dependent X-ray powder diffraction, infrared spectroscopy, and some preliminary theoretical calculations of non-linear optic activity. The compound crystallizes in the non-centrosymmetric space group Pca21 with unit cell parameters: a = 22.714(5), b = 7.313(5), c = 7.301(5) Å, Z = 4, and V = 1212.8(12) Å3. The structure was solved using direct methods and refined by least-squares analysis R 1 = 0.0484 and wR 2 = 0.1255]. It is built from isolated ZnCl4]2? anions, 2,5-diaminopyridinediium C5H9N3]2+ cations, and water molecules which are connected by a 3-D hydrogen-bond network. Thermodiffractometry and thermogravimetric analyses indicate that its decomposition proceeds through four stages leading to a new crystalline anhydrous phases.
Keywords:Chemical preparation  Crystal structure  Thermal decomposition  Second-order NLO properties  IR spectroscopy
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号