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层状钨基氧化物复合材料的合成与电子特性
引用本文:王炳山,董晓雯,潘庆谊,程知萱.层状钨基氧化物复合材料的合成与电子特性[J].无机化学学报,2007,23(2):200-204.
作者姓名:王炳山  董晓雯  潘庆谊  程知萱
作者单位:上海大学理学院化学系,上海,200444
基金项目:上海市纳米科技专项基金
摘    要:W2O6·H2O /一元烷基胺复合物(CnH2n+1NH2n=4、8、12、16)嵌入层状氧化钨W2O6·H2O] 的XRD、IR、TG-DSC分析表明:烷基胺CnH2n+1NH2能基于质子加合的机制嵌入W2O6·H2O层间,且插层复合物之间烷基胺的插入与抽出是个可逆过程;烷基胺嵌入层间后以全反式构象双层排布,层间距d随烷基胺碳原子数的增加而线性增长,烷基链与层板的夹角为71.6°。插层复合物UV-Vis分析发现,各种复合物的禁带宽度相对半导体氧化钨的禁带宽度变宽了很多,这表明可以通过嵌入不同的物质来调节氧化钨层与层之间的电子传递能力。

关 键 词:层状复合材料    W2O6·H2O(H2W2O7)    一元烷基胺    禁带宽度
文章编号:1001-4861(2007)02-0200-05
修稿时间:2006-09-27

Synthesis and Electronic Characterization of Organic-tungsten Oxide Hybrid Systems
WANG Bing-Shan,DONG Xiao-Wen,PAN Qing-Yi and CHENG Zhi-Xuan.Synthesis and Electronic Characterization of Organic-tungsten Oxide Hybrid Systems[J].Chinese Journal of Inorganic Chemistry,2007,23(2):200-204.
Authors:WANG Bing-Shan  DONG Xiao-Wen  PAN Qing-Yi and CHENG Zhi-Xuan
Institution:Department of Chemistry, College of Science, Shanghai University, Shanghai 200444,Department of Chemistry, College of Science, Shanghai University, Shanghai 200444,Department of Chemistry, College of Science, Shanghai University, Shanghai 200444 and Department of Chemistry, College of Science, Shanghai University, Shanghai 200444
Abstract:Intercalation behavior of n-alkylamines into layered W2O6·H2O has been investigated. W2O6·H2O can accommodate n-alkylamines(CnH2n+1NH2,n=4,8,12,16)to form intercalation compounds via an acid-base mechanism, and reversible intercalation and deintercalation behavior was observed among DAn(where DAn represents intercalation compounds of W2O6·H2O/CnH2n+1NH2, and DA4, DA8, DA12, DA16 denote W2O6·H2O/C4H9NH2, W2O6·H2O/C8H17NH2, W2O6·H2O/C12H25NH2, and W2O6·H2O/C16H33NH2, respectively). The intercalation compounds were characterized by XRD, IR, SEM as well as TG-DSC. The results show that the interlayer distance of intercalation compounds increases with the increase in the number of carbon atoms in the n-alkyl chain, and n-alkylamines exhibit a bilayer arrangement in the interlayer space with a tilt angle of 71.6°. The intercalation of n-alkylamines (CnH2n+1NH2, n=4, 8, 12, 16) into W2O6·H2O also appears to increase the band-gap energy (Eg) as compared with W2O6·H2O or WO3, but no difference in Eg was observed among DAn, indicating that the oxide layers are electronically decoupled.
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