共搜索到21623条信息,每页显示10条信息,共2163页。用时:0小时0分0秒171毫秒
Synthesis, Crystal Structure of [(MeC5H4)2Ln(μ-OCH2CH2NMe2)]2(Ln=Sm, Y, Nd) and Their Catalytic Activity for Ring-Opening Polymerization of ε-Caprolactone 沈琪1,姚英明1,周玉芳1,邓明宇1,翁林红2 (1.Department... with the additional two Sm-N bonds via intramolecular coordination of OCH2CH2NMe2. The coordination number of the central metal Sm is nine. The title complexes show good catalytic activity for ring-opening......
)(OC8H17-i)2 (4),di(2-ethylhexyl)ethyl phosphonateC2H5P(O) (OC8H17-i)2 (5),in nitrate system have been studied.The coordination compounds were prepared.The structure of these extractants...Structure Reactivity Studies on the Extraction of Rare Earths by Di(2-ethylhexyl)chloroalkyl Phosphonates叶伟贞,严金英摘 要:<正> The extractive separation......
A study on the composition and structure of cyclic sulfoxide derivative palladium(Ⅱ) complexWU Songping, GU Guobang, and MENG Shuyuan South China University of Technology, Guangzhou 510630, ChinaFenghua Advanced Technology (Holding) Co., Ltd, Zhaoqing 526020, China摘 要:<正>The composition and structure of cyclic sulfoxide derivative Pd(Ⅱ) complex......
EXAFS Studies on Local Atomic Structure in the Amorphous Mg65Cu25Gd10 Alloy李国强Business Development Department, China Perfect Machinery Industry Corp. Ltd摘 要:Local atomic structures of an amorphous Mg65Cu25Gd10 alloy and the structural changes by thermal annealing have been studied by extended X-ray absorption fine structure (EXAFS). The correlation......
......
Hydrothermal synthesis and structural studies of a new coordination polymer of lanthanum(Ⅲ) with benzene-1,2,4,5-tetracarboxylic acid and 4,4′-bipyridineMasoumeh Tabatabaee1,Mahboubeh.... The LaIII atom was ten coordinated in a distorted tetracapped trigonal prism. In the crystal structure,a wide range of noncovalent interactions consisting of hydrogen bonding(of the types of O-H···O,N......
associated with the respective coordination number of H and Mg atoms located at surface layer as well as the energy gap near Fermi energy level of the system. Namely, the fewer coordination number... structure......
, the clear observation of Cu atoms taking onbcc coordination in the solid solution and Fe atoms remaining bcc structure furtherverifies the reality of atomic alloying between Fe and Cu atoms...EXAFS STUDY OF THE SHORT RANGE STRUCTURE OF NANOCRYSTALLINE BCC-Fe80Cu20 SOLID SOLUTION G.M.Wang1,X.J.Bai2,T.C.Kuang2,S.Q.Wei1,Y.Z.Yang2 (1.Center of Structure Analysis, University of Science......
......
structure parameters of Gaatoms in Ga2O3-P2O5 glasses.The Ga-O average bondlength is 1.75-1.86 and Ga atoms can form both[GaO4] tetrahedra and [GaO6] octahedra in some ofthese glasses.The coordination...EXAFS STUDY OF THE LOCAL STRUCTURE OF Ga IN Ga2O3-P2O5 GLASSES林云飞,黄维炜,陆坤权,赵雅琴,常龙存摘 要:<正> Room temperature EXAFS spectra of a series ofgallium......