摘要
本文对乙二胺溶液中裸露金属原子簇用^(119)Sn及^(207)Pb核磁共振作了研究。对每个峰做了标识。根据谱线强度进行分析,得知溶液中锡与铅的比例大于固体中的比例。从自由能的角度看,Pb_2Sn_7^(4-)是最不稳定的一种原子簇,本文还对谱线中各条线都进行了理论拟合,结果与实验相吻合。
In the present work the naked-metal clusters, PbxSn4-(9-x), have been fully characterized in ethylenediamine solution by 119Sn and 207Pb NMR spectroscopy. The peaks arc assigned. According to the experiments, it is found that the ratio of tin to lead is greater in the liquid than
the solid: , where Qi denotes the total amount of element i. By com-
paring the free energies of the clusters, Pb2Sn74- is the most unstable one. This study also deals with the intensities of the spectra and the theoretical results are in good agreement with those of NMR measurements.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1992年第3期259-265,共7页
Chinese Journal of Inorganic Chemistry
基金
中国国家自然科学基金
加拿大自然科学与工程基金
部分测试工作得到北京中关村联合测试中心资助
