Some Novel Manganese(III) Mixed Ligand Complexes and Its Decolourization Studies

被引:1
|
作者
Jaiswal, Deepika [1 ]
Yadava, Sudha [1 ]
机构
[1] DDU Gorakhpur Univ, Dept Chem, Gorakhpur, Uttar Pradesh, India
关键词
Mn(III) mixed ligand complexes; Glycine; Ethylenediamine; Dye decolourization;
D O I
10.13005/ojc/340625
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Some novel mixed ligand complexes of Mn(III) with glycine ligand namely [Mn(gly)(2)Cl(en)], [Mn(gly)(2)Br(en)], [Mn(gly)(2)N-3(en)] and [Mn(gly)(2)NCS(en)] have been synthesized starting from Mn(gly)(2)Cl, Mn(gly)(2)Br, Mn(gly)(2)N-3 and Mn(gly)(2)NCS respectively. These newly synthesized complexes have been characterized by UV-Vis, FT-IR and Mass spectrometry. The spectroscopic data suggest distorted octahedral geometry for all these mixed ligand complexes. The lambda max values of these complexes for T-5(2g)->(5)Eg transitions are 482 nm for [Mn(gly)(2)N-3(en)], 488 for [Mn(gly)(2)NCS(en)], 486 for [Mn(gly)(2)Br(en)] and 484 for [Mn(gly)(2)Cl(en)] all these transitions are red shifted in comparison to their parent complexes. The ligand field parameters such as 10 Dq, B and beta have also been calculated and suggest covalent metal ligand bonding. One peculiar finding is that the FT-IR spectra shows frequencies for both free and coordinated NH2 group in all complexes indicating that the ethylenediamine ligand present here is non bridging in nature. The mass spectrometry results show molecular ion peaks at m/z 300, 345, 307 and 323 for [Mn(gly)(2)Cl(en)], [Mn(gly)(2)Br(en)], [Mn(gly)(2)N-3(en)] and [Mn(gly)(2)NCS(en)] respectively. The coordination of ethylenediamine to Mn(III) enhances its efficiency towards decolourization methyl red dye.
引用
收藏
页码:2867 / 2871
页数:5
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