Electron Acceptors of the Fluorene Series. 10.<sup>1</sup> Novel Acceptors Containing Butylsulfanyl, Butylsulfinyl, and Butylsulfonyl Substituents: Synthesis, Cyclic Voltammetry, Charge-Transfer Complexation with Anthracene in Solution, and X-ray Crystal Structures of Two Tetrathiafulvalene Complexes
作者:Igor F. Perepichka、Anatolii F. Popov、Tatyana V. Orekhova、Martin R. Bryce、Alexander M. Andrievskii、Andrei S. Batsanov、Judith A. K. Howard、Nikolai I. Sokolov
DOI:10.1021/jo991796r
日期:2000.5.1
present substantial steric hindrance for complexation (as compared to the nitro group), decreasing K(CTC) values. Two CTCs for acceptors 14 and 17 with tetrathiafulvalene (TTF) were obtained, and their structures were solved by single-crystal X-ray diffractometry, giving the stoichometries 14:TTF, 2:3, and 17:TTF:PhCl, 1:1:0.5. In the former complex the packing motif is a mixed.DDAD'A. stack; in the
在偶极非质子传递溶剂中,2,4,5,7-四硝基-9-芴酮(1b)与正丁硫醇容易反应,位置2和7(2,3)处的丁基硫烷基选择性取代硝基;2,5-异构体4仅形成次要产物(<1%)。芴酮2-4与丙二腈的缩合产生9-二氰基亚甲基衍生物5-7,其显示出强的分子内电荷转移(λ约510-560nm),并且发现其可敏化含咔唑的聚合物膜的光电导性。硫化物2-4的氧化得到亚砜8或砜9-11,然后将其转化为它们相应的二氰基亚甲基衍生物12-15。所有这些新颖的受体都显示出三个可逆的单电子还原波(循环伏安法),产生自由基阴离子,二价阴离子和自由基三价阴离子。此外,受体13-15还显示出第四还原波,代表可逆的四阴离子形成。二氰基亚甲基取代了芴酮中羰基上的氧,从而增加了自由基阴离子的热力学稳定性(K(SEM)生长)。K(SEM)范围从3 x 10(5)到3 x 10(9)M(-1)。CV测量将化合物3、4(EA = 1