Observation of characteristic IR band assignable to dimerized copper ions in montmorillonite
Observation of characteristic IR band assignable to dimerized copper ions in montmorillonite
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DOI：
10.1016/j.jcis.2006.12.002
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发表时间：
2007-04-01
影响因子：
9.9
通讯作者：
Nagao, Mahiko
中科院分区：
文献类型：
--
作者：
Tanaka, Masashi;Itadani, Atsushi;Nagao, Mahiko
在323K以上的CuCl2水溶液中用离子交换法制备了铜离子交换蒙脱土，在3360-3310 cm(-1)处出现了特征红外吸收峰。用不同的离子交换溶液在不同的温度下制备的样品没有观察到这样的谱带。光谱观察表明，离子交换铜离子(Cu2+)在蒙脱石中通过桥联两个羟基[Cu2+<；(OH-)(2)&Gt；Cu2+]而以二聚形式存在。(C)2006 Elsevier Inc.保留所有权利。
Copper ion-exchanged montmorillonite clays, which had been prepared by ion exchange in an aqueous solution Of CuCl2 at a temperature above 323 K, exhibited the characteristic IR band in the region 3360-3310 cm(-1). No such bands were observed for the samples prepared by using different ion-exchange solutions and at different temperatures. From the spectroscopic observations, it was revealed that the ion-exchanged copper ions (Cu2+) are in the form of dimerized species by bridging two hydroxyls, [Cu2+ < (OH-)(2) > Cu2+], in montmorillonite. (c) 2006 Elsevier Inc. All rights reserved.