Ordering and Freezing-in Phenomena of Nanochannel Water in Crystalline Organic/Inorganic Self-Assembled Complex [Cr(H2bim)3](TMA)·23.5H2O

摘要: The thermal properties of crystalline complex [Cr(H2bim)3](TMA)·23.5H2O were studied by adiabatic calorimetry to clarify the structural ordering and dynamic freezing-in behaviors nanochannel water within pores possessing wall structure, where H2bim denotes 2,2′-biimidazole TMA is 1,3,5-benzenetricarboxylic acid. Phase glass transitions found occur at 233 K with associated entropy ΔtrsS = 7.96 J K−1 mol−1 Tg 100 K, respectively, in hydrated sample. phase transition was interpreted as attributed crystallization-like formation hydrogen-bond network channel-water molecules. a phenomenon on way development network, its presence indicates that achieves no completion even K. value similar those previously other systems [Ni(cyclam)(H2O)2]3(TMA)2·24H2O porous silica. It noted ...