ATR-FTIR spectroscopic investigation of the cis- and trans- bis-( α -amino acids) copper(II) complexes
作者:Tatyana V. Berestova、Lyudmila G. Kuzina、Natalya A. Amineva、Ilshat S. Faizrakhmanov、Ismail A. Massalimov、Akhat G. Mustafin
DOI:10.1016/j.molstruc.2017.02.023
日期:2017.6
a different maxima for the trans ( a )- and cis ( b )-isomers. It found that ν as (COO) and ν s (COO) stretching vibrations of cis -isomers are broadened and shifted to longer wavelengths ( b ) as compared with trans -isomers ( a ). Shown that peculiarities of crystal packing molecules of geometric isomers may affect on carboxylate stretching vibration bis-α-amino acids complexes copper(II) 1–5 a,b
摘要 双-(α-氨基酸)铜(II)配合物[Cu(b L) 2 ] 1-5 ( b L - 二齿配体)的反式-( a )和顺式-( b )-异构体的结晶相: gly ( 1 ), S -ala ( 2 ), R,S -val ( 3 ), (±)-thr ( 4 ), R,S -phe ( 5 )) 在中期通过 ATR-FTIR 光谱研究区域红外光谱。已确定 1 – 5 个羧基的不对称 ν as (COO) 和对称 ν s (COO) 伸缩振动对几何结构的变化很敏感,并且对于反式 ( a )- 和顺式 ( b ) 具有不同的最大值)-异构体。结果发现,与反式异构体 (a) 相比,顺式异构体的 ν as (COO) 和 ν s (COO) 伸缩振动被加宽并转移到更长的波长 ( b )。