کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
675075 | 1459592 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermochemical properties of the rare earth complexes with pyromellitic acid
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Fourteen rare earth complexes with pyromellitic acid were synthesized and characterized by means of chemical and elemental analysis, and TG–DTG. The constant-volume combustion energies of complexes, ΔcU , were measured by a precise rotating-bomb calorimeter (RBC-type II). Their standard molar enthalpies of combustion, ΔcHmθ, and standard molar enthalpies of formation, ΔfHmθ, were calculated at T = 298.15 K. The relationship of ΔcHmθ and ΔfHmθ with the atomic numbers of the elements in the lanthanide series was examined. The results show that a certain amount of covalence is present in the chemical bond between rare earth cations and the ligand.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 490, Issues 1–2, 1 June 2009, Pages 43–46
Journal: Thermochimica Acta - Volume 490, Issues 1–2, 1 June 2009, Pages 43–46
نویسندگان
Lijun Wang, Fei Liu, Xuwu Yang, Xiaoyan Wang, Ruiping Liu, Sa Zhao, Sanping Chen,