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题名: Crystal structures and thermochemistry on phase change materials (n-CnH2n+1NH3)(2)CuCl4(s) (n=14 and 15)
作者: He, Dong-Hua1;  Di, You-Ying1;  Tan, Zhi-Cheng2;  Yi, Fang-Fang1;  Dan, Wen-Yan1;  Liu, Yu-Pu1
关键词: (n-CnH2n+1NH3)(2)CuCl4 (n=14 and 15) ;  X-ray crystallography ;  Phase change materials ;  Adiabatic calorimetry ;  Low-temperature heat capacity ;  Solid-solid phase transition
刊名: SOLAR ENERGY MATERIALS AND SOLAR CELLS
发表日期: 2011-10-01
DOI: 10.1016/j.solmat.2011.06.014
卷: 95, 期:10, 页:2897-2906
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Energy & Fuels ;  Materials Science, Multidisciplinary ;  Physics, Applied
研究领域[WOS]: Energy & Fuels ;  Materials Science ;  Physics
英文摘要: Crystalline compounds (C14H29NH3)(2)CuCl4(s) and (C15H31NH3)(2)CuCl4(s) were synthesized. X-ray crystallography was applied to characterize crystal structures of the two compounds. The crystal system is both monoclinic, the space group is both C2/c, and Z=4. The lattice potential energies of the title compounds were calculated to be U-POT [(C14H29NH3)(2)CuCl4, s]=853.12 kJ/mol and U-POT [(C15H31NH3)(2)CUCl4, s]=854.93 kJ/mol. Low-temperature heat capacities of the two compounds were measured by a precision automatic adiabatic calorimeter over the temperature range from 78 to 395 K. The temperatures, molar enthalpies, and entropies of two phase transitions for each of the two complexes were determined to be: for (C14H29NH3)(2)CuCl4(s), 342.35 +/- 0.11 K, 76.17 +/- 0.40 kJ/mol, and 222.49 +/- 1.20 J/K mol for the first peak; 352.61 +/- 0.09 K, 27.83 +/- 0.27 kJ/mol, and 78.92 +/- 0.78 J/K mol for the second peak, and for (C15H31NH3)(2)CuCl4(s), they were 345.40 +/- 0.93 K, 62.06 +/- 1.07 kJ/mol, and 179.67 +/- 2.63 J/K mol for the first peak; 360.98 +/- 0.25 K, 21.66 +/- 0.76 kJ/mol, and 60.00 +/- 2.09 J/K mol for the second peak, respectively. The smoothed heat capacities and thermodynamic functions (H-T(o)-H-298.15(o)) and (Delta S-trs(m)=Delta H-trs(m)/T-trs) of the two compounds were calculated with an interval of 5 K based on the experimental heat capacities. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: THERMAL-ENERGY STORAGE ;  HEAT-CAPACITY ;  TRANSITIONS
语种: 英语
WOS记录号: WOS:000293936300027
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142329
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Liaocheng Univ, Coll Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, China Ion Liquid Lab & Thermochem Lab, Dalian 116023, Peoples R China

Recommended Citation:
He, Dong-Hua,Di, You-Ying,Tan, Zhi-Cheng,et al. Crystal structures and thermochemistry on phase change materials (n-CnH2n+1NH3)(2)CuCl4(s) (n=14 and 15)[J]. SOLAR ENERGY MATERIALS AND SOLAR CELLS,2011,95(10):2897-2906.
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