Selective anion-exchange properties of second-stage layered double hydroxide heterostructures

被引：56

作者：

Feng, Y. J.

Williams, G. R.

Leroux, F.

Taviot-Gueho, C.

O'Hare, D.

机构：

[1] Univ Clermont Ferrand, UMR 6002 CNRS, Lab Mat Inorgan, F-63177 Aubiere, France

[2] Univ Oxford, Dept Chem, Chem Res Lab, Oxford OX1 3TA, England

来源：

CHEMISTRY OF MATERIALS | 2006年 / 18卷 / 18期

基金：

英国工程与自然科学研究理事会;

关键词：

X-RAY-DIFFRACTION; POWDER DIFFRACTION; INTERCALATION;

D O I：

10.1021/cm0605825

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：

The anion-exchange properties of second-stage [Zn2Cr(OH)(6)]Cl-0.5(succinate)(0.25)(.)nH(2)O (Zn2Cr-Succ/Cl) and [Zn2Cr(OH)(6)]Cl-0.5(tartrate)(0.25), nH(2)O (Zn2Cr-Tart/Cl) materials were investigated by means of time-resolved in situ energy-dispersive X-ray diffraction (EDXRD). Selective anion-exchange reactions were observed that were a result of the segregation between organic and inorganic anions. Indeed, the reaction of Zn2Cr-Succ/Cl and Zn2Cr-Tart/Cl second-stage compounds with either fluoride or adipate anions initially occurs with preferential replacement of the hydrophilic Cl ion with F or replacement of the hydrophobic succinate or tartrate anions with adipate; this leads to the formation of new second-stage intermediates Zn2Cr-Succ/F and Zn2Cr-Tart/F or Zn2Cr-Adip/Cl. The formation of such heterostructures offers new perspectives for LDH intercalation chemistry, particularly in the direction of multifunctional materials.

引用

页码：4312 / 4318

页数：7

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