Cu2+ ions as a paramagnetic probe to study the surface chemical modification process of layered double hydroxides and hydroxide salts with nitrate and carboxylate anions

被引：42

作者：

Carbajal Arizaga, Gregorio Guadalupe ^{[1
]}

Mangrich, Antonio Salvio ^{[2
]}

Wypych, Fernando ^{[1
]}

机构：

[1] CEPESQ, LQES, BR-81531990 Curitiba, Parana, Brazil

[2] Univ Fed Parana, Dept Quim, Lab Projetos & Processos Ambientais, BR-81531990 Curitiba, Parana, Brazil

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2008年 / 320卷 / 01期

关键词：

layered double hydroxide; layered hydroxide salt; intercalation; electron paramagnetic resonance; surface chemical modification;

D O I：

10.1016/j.jcis.2007.12.025

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A layered zinc hydroxide nitrate (Zn-5(OH)(8)(NO3)(2)center dot 2H(2)O) and a layered double hydroxide (Zn/Al-NO3) were synthesized by coprecipitation and doped with different amounts of Cu2+ (0.2, 1, and 10 mol%), as paramagnetic probe. Although the literature reports that the nitrate ion is free (with D-3h symmetry) between the layers of these two structures, the FTIR spectra of two zinc hydroxide nitrate samples show the C-2 nu symmetry for the nitrate ion, whereas the g(parallel to)/A(parallel to) value in the EPR spectra of Cu2+ is high. This fact suggests bonding of some nitrate ions to the layers of the zinc hydroxide nitrate. The zinc hydroxide nitrate was used as matrix in the intercalation reaction with benzoate, o-chlorobenzoate, and o-iodobenzoate ions. FTIR spectra confirm the ionic exchange reaction and the EPR spectroscopy reveals bonding of the organic ions to the inorganic layers of the zinc hydroxide nitrate, while the layered double hydroxides show only exchange reactions. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：238 / 244

页数：7

共 25 条

[1]

[Anonymous], ELECT PARAMAGNETIC R

[2] Synthesis, spectroscopic and redox behaviour of copper(II), nickel(II) and cobalt(II) complexes of some macrocyclic multidentates [J].

Athappan, P ;

Rajagopal, G .

POLYHEDRON, 1996, 15 (03) :527-534

[3] Layered hydroxide salts: Synthesis, properties and potential applications [J].

Carbajal Arizaga, Gregorio Guadalupe ;

Satyanarayana, Kestur Gundappa ;

Wypych, Fernando .

SOLID STATE IONICS, 2007, 178 (15-18) :1143-1162

[4] The intercalation of carboxylic acids into layered double hydroxides: A critical evaluation and review of the different methods [J].

Carlino, S .

SOLID STATE IONICS, 1997, 98 (1-2) :73-84

[5] Characterization of zinc hydroxynitrates by diffuse reflectance infrared spectroscopy - structural modifications during thermal treatment [J].

Chouillet, C ;

Krafft, JM ;

Louis, C ;

Lauron-Pernot, H .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2004, 60 (03) :505-511

[6] Applications of layered double hydroxides [J].

Feng, L ;

Duan, X .

LAYERED DOUBLE HYDROXIDES, 2006, 119 :193-223

[7]

GENIN P, 1991, EUR J SOL STATE INOR, V28, P505

[8] Covalent grafting of ethylene glycol into the Zn-Al-CO3 layered double hydroxide [J].

Guimaraes, JL ;

Marangoni, R ;

Ramos, LP ;

Wypych, F .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2000, 227 (02) :445-451

[9] Crystal structure dynamical and dipolar effects in EPR spectra of Cu(2-benzoylpyridine)(2)(ClO4)(2) [Cu(C12H9NO)(2)(ClO4)(2)] crystal with negligible exchange interaction [J].

Hoffmann, SK ;

Goslar, J ;

Hilczer, W ;

Goher, MAS ;

Luo, BS ;

Mak, TCW .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1997, 58 (09) :1351-1358

[10] Selective anion-exchange intercalation of isomeric benzoate anions into the layered double hydroxide [LiAl2(OH)6]Cl•H2O [J].

Lei, LX ;

Khan, A ;

O'Hare, D .

JOURNAL OF SOLID STATE CHEMISTRY, 2005, 178 (12) :3648-3654

← 1 2 3 →