Hexasubstituted Benzenes with Ultrastrong Dipole Moments
Hexasubstituted Benzenes with Ultrastrong Dipole Moments
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DOI：
10.1002/anie.201508249
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发表时间：
2016-02-24
影响因子：
16.6
通讯作者：
Muellen, Klaus
中科院分区：
文献类型：
--
作者：
Wudarczyk, Jakob;Papamokos, George;Muellen, Klaus
用介电光谱和DFT方法测定了已知的最高偶极矩，合成了六取代苯。在制备4,5-二氨基-3,6-二溴邻苯二腈的基础上，结合合成二氢苯并咪唑的新方法，这些苯衍生物的偶极矩均超过10debye。这种偶极矩在铁电体、非线性光学和有机光伏中是理想的。通过单晶x射线晶体学测定其结构，通过紫外/可见吸收和荧光光谱测定其光学性质。
Hexasubstituted benzenes have been synthesized with the highest known dipole moments, as determined by dielectric spectroscopy and DFT methods. Based on the preparation of 4,5-diamino-3,6-dibromophthalonitrile, combined with a novel method to synthesize dihydrobenzimidazoles, these benzene derivatives have dipole moments in excess of 10debye. Such dipole moments are desirable in ferroelectrics, nonlinear optics, and in organic photovoltaics. Structure determination was achieved through single-crystal X-ray crystallography, and the optical properties were determined by UV/Vis absorption and fluorescence spectroscopy.