摘要
用转动弹热量计测定了组成为ＲＥ（Ｍｅｔ）４（ＮＯ３）３·６Ｈ２Ｏ（ＲＥ＝Ｌａ～Ｎｄ，Ｓｍ～Ｌｕ）的固态配合物的燃烧能，求得了各配合物的标准燃烧焓与标准生成焓。发现标准生成焓随镧系元素原子序数的变化呈“四分组”规律，说明稀土离子与蛋氨酸间的化学键有一定程度的共价性。
The combustion energies have been determined for the fourteen nitrate with a rotatingbomb calorimeter. Their standard enthalpies of combustion and standard enthalpies △fH(s) of formation have been calculated. The corresponding data for complex Pm(Met)4(NO3 )3· 6H2O were estimated. The relation of △fH(s) with the atomic numbers of the elements in lanthanide series has been set up. The results show that a certain extent of covalency exists in the chemical bond between the rare earth canon and methionine.
出处
《中国稀土学报》
CAS
CSCD
北大核心
1996年第3期201-205,共5页
Journal of the Chinese Society of Rare Earths
基金
陕西省自然科学基金
关键词
蛋氨酸
固态配合物
热化学性质
稀土元素
Rare earth nitrate, Methionine, Solid complexes, Combustion energy, Standard enthalpy of formation
