Synthesis, characterization, and dc conductivity of hydrogen-bonding dibenzotetrathiafulvalene (DBTTF) based salts
Synthesis, characterization, and dc conductivity of hydrogen-bonding dibenzotetrathiafulvalene (DBTTF) based salts
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DOI：
10.1016/j.synthmet.2009.12.007
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发表时间：
2010-04-01
期刊：
影响因子：
4.4
通讯作者：
Shibue, T.
中科院分区：
文献类型：
--
作者：
Kobayashi, Y.;Suzuki, A.;Shibue, T.
报道了有机导体1 -[2-（1，3-苯并二硫醇-2-亚基）-1，3-苯并二硫醇-5-基]乙基四氟硼酸铵（[DBTTFCH（Me）NH（3）（+）]BF（4）（-））和1-[2-（1，3-苯并二硫醇-2-亚基）-1，3-苯并二硫醇-5-基]乙基溴化铵（[DBTTFCH（Me）NH（3）（+）]Br（-）盐的合成、表征和直流电导率。这些盐是通过将相应的伯胺和布朗斯台德酸以一比一的比例混合而不进行电化学氧化来制备的。用紫外可见光谱和电子自旋共振谱证实了绝缘的DBTTFCH（Me）NH（2）转变为导电的[DBTTFCH（Me）NH（3）（+）]X（-）（X = BF（4）和Br）盐的电子态变化和成盐过程中载流子的产生。BF（4）和Br盐的定域自由基浓度分别为1个自由基/3.3单位和1个自由基/1.8单位。通过（1）H NMR和ESI-TOE-MS光谱分析提出了可能的载流子产生机理。对于BF（4）盐，直流电导率和活化能为sigma（pi）=2.3 × 10（-3）S/cm，0.24 eV，对于Br盐，sigma（pi）= 1.3 × 10（-3）S/cm，0.21 eV。(C)2009爱思唯尔有限公司版权所有。
The synthesis, characterization, and dc conductivity of organic conductors, 1 -[2-(1,3-benzodithiol-2-ylidene)-1,3-benzodithiol-5-yl]ethylammonium tetrafluoroborate ([DBTTFCH(Me)NH(3)(+)]BF(4)(-)) and 1-[2-(1,3-benzodithiol-2-ylidene)-1.3-benzodithiol-5-yl]ethylammonium bromide ([DBTTFCH(Me)NH(3)(+)]Br(-)) salts are presented. These salts are prepared by mixing the corresponding primary amine and Bronsted acid in a one-to-one ratio without electrochemical oxidation. The change in the electronic state of insulating DBTTFCH(Me)NH(2) into conductive [DBTTFCH(Me)NH(3)(+)]X(-) (X = BF(4) and Br) salts and the carrier generation upon salt formation were confirmed by diffuse reflectance (UV-vis) and ESR spectra. The concentration of localized radicals is estimated to be 1 radical/3.3 units and 1 radical/1.8 units for BF(4) and Br salts, respectively. The possible carrier generation mechanism is proposed by (1)H NMR and ESI-TOE-MS spectroscopic analyses. The dc conductivity and the activation energy are sigma(pi) =2.3 x 10(-3) S/cm with 0.24 eV for the BF(4) salt, and sigma(pi) = 1.3 x 10(-3) S/cm with 0.21 eV for the Br salt. (C) 2009 Elsevier B.V. All rights reserved.