Nanosized starlike molecules. Synthesis and optical properties of tris- and tetrakis[oligo(disilanylenebithienylene)dimethylsilyl]benzene
Nanosized starlike molecules. Synthesis and optical properties of tris- and tetrakis[oligo(disilanylenebithienylene)dimethylsilyl]benzene
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DOI：
10.1016/j.jorganchem.2008.10.053
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发表时间：
2009-02-01
影响因子：
2.3
通讯作者：
Ishikawa, Mitsuo
中科院分区：
文献类型：
--
作者：
Naka, Akinobu;Matsumoto, Yoshiaki;Ishikawa, Mitsuo
已经报道了两类具有三个和四个方向伸展臂的星状分子的合成。以1，3，5-三(氯二甲基硅基)苯为核，与锂[低聚(二硅亚甲基二硫)]衍生物反应，合成了具有规则交替排列的硅硅键和向三个方向延伸的二亚硫烯单元组成的分子。以1，2，4，5-四(氟二甲基硅基)苯为核，与锂[低聚(二硅联硫烯)]S反应，制备了四个方向伸展臂的星状分子，研究了这些星状分子在二氧六环溶液中的紫外-可见吸收光谱和荧光性质。该分子在321-337 nm范围内具有最大吸收峰，其荧光量子产率高于相应的线型聚合物聚[(四乙基二硅烷基)联苯]的荧光量子产率。(C)2008爱思唯尔B.V.保留所有权利。
The syntheses of two types of starlike molecules with the arms that extend to three and four directions have been reported. The molecules with the arms consisting of a regular alternating arrangement of a silicon-silicon bond and bithienylene unit that extend to three directions were synthesized by the reactions of 1,3,5-tris(chlorodimethylsilyl) benzene, which was chosen as a core, with the lithio[oligo(disilanylenebithienylene)] derivatives. The starlike molecules with extended arms to four directions were prepared by the reaction of 1,2,4,5-tetrakis(fluorodimethylsilyl) benzene used as a core, with lithio[oligo(disilanylenebithienylene)]s. UV-Vis absorption and fluorescence properties of these starlike molecules have been investigated in a dioxane solution. The present molecules showed absorption maxima in a range of 321-337 nm, and revealed higher fluorescence quantum yields than that of the corresponding linear polymer, poly[(tetraethyldisilanylene) bithiophene]. (C) 2008 Elsevier B.V. All rights reserved.