Density functional theory studies of Pb (II) interaction with chitosan and its derivatives

被引：18

作者：

Hassan, Basila ^{[1
]}

Muraleedharan, K. ^{[1
]}

Mujeeb, V. M. Abdul ^{[1
]}

机构：

[1] Univ Calicut, Dept Chem, Malappuram 673635, Kerala, India

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2015年 / 74卷

关键词：

Density functional theory; Natural bond orbital analysis; Molecular electrostatic potential maps; HYDROGELS; CHITIN;

D O I：

10.1016/j.ijbiomac.2015.01.006

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：

Density functional theory (DFT) studies of Pb (II) ions interaction with biopolymer chitosan and its derivatives are presented. Schiff bases and N-alkylated/arylated derivatives of chitosan were characterized as adsorbents of lead ions and are studied at monomer level. Natural bond orbital (NBO) analysis was carried out for chitosan and derivatives to understand the donor-acceptor interactions. Molecular electrostatic potential (MEP) maps of the adsorbents were plotted with color code. Global reactivity parameters of adsorbents were calculated on the basis of frontier molecular orbital (FMO) energies. Structure of complexes formed between chitosan and derivatives with Pb (II) ion were examined at B3LYP/LanL2DZ level of DFT. The stability of the complexes are discussed based on the values of Eads. We observed that the N-reduced pyridine carboxaldehyde derivative of chitosan (RPC) forms more stable complex with Pb (II) ions than with other derivatves. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：483 / 488

页数：6

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