Thin films of hydroxy-TEMPO-substituted TTF and of its charge-transfer complex with TCNQ

被引:21
作者
Casellas, H
de Caro, D
Valade, L
Fraxedas, J
机构
[1] CSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, Spain
[2] CNRS, Chim Coordinat Lab, UPR 8241, F-31077 Toulouse 4, France
关键词
D O I
10.1039/b111662m
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Thin films of 4-hydroxy-TEMPO-substituted TTF [TTF-(OH)TEMPO] were grown on ex situ cleaved KBr (001) using the high vacuum evaporation technique. Sub-micronic grains uniformly covering the KBr surface were evidenced by scanning electron microscopy (SEM). The films were also studied by infrared (IR), electron spin resonance spectroscopy (ESR) and X-ray photoelectron spectroscopy (XPS). Amorphous thin films of [TTF-(OH)TEMPO] [TCNQ] were obtained on KBr pellets and on micro-rough Si(001) wafers using chemical vapour deposition (CVD). They were characterized by SEM, IR, XPS and ESR. SEM images on micro-rough Si(001) wafers evidenced micro-needles (0.5-2 mum length, 0.1-.2 mum in diameter), uniformly covering the substrate surface. CN stretching frequencies were in agreement with a reduced TCNQ moiety, thus indicating a charge transfer between the donor [TTF-(OH)TEMPO] and the acceptor (TCNQ) molecules ( degree of charge transfer similar to1).
引用
收藏
页码:915 / 919
页数:5
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