Crystals of 4,7-Bis(2,5-dimethyl-[1,1'-biphenyl]-4-yl)benzothiadiazole and Its Derivative with Terminal n-Hexyl Substitutes: Growth, Structure, Thermal and Absorption/Fluorescent Properties
V. A. Postnikov, N. I. Sorokina, G. A. Yurasik, T. A. Sorokin, A. A. Kulishov, M. S. Lyasnikova, V. V. Popova, E. A. Svidchenko, N. M. Surin, O. V. Borshchev
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引用次数: 0
Abstract
The crystallization and absorption/fluorescent properties of linear conjugated molecules derived from 2,1,3-benzothiadiazole, specifically, 4,7-bis(2,5-dimethyl-[1,1'-biphenyl]-4-yl)benzothiadiazole (Ph-Xy-BTD) and 4,7-bis(4'-hexyl-2,5-dimethyl-[1,1'-biphenyl]-4-yl)benzothiadiazole (Hex-Ph-Xy-BTD), have been studied. The synthesis of a new derivative of Hex-Ph-Xy-BTD is described. It was found that the presence of terminal n-hexyl substituents in Hex-Ph-Xy-BTD reduces the melting temperature, increases solubility, and has a positive effect on crystallization as compared to Ph-Xy-BTD. Hex-Ph-Xy-BTD single crystals were grown from a hexane solution, and their structure was elucidated using single-crystal X-ray diffraction, confirming a monoclinic system (sp. gr. P21/c, Z = 4). Absorption and fluorescence spectra were obtained and analyzed for solutions in tetrahydrofuran, as well as for the Ph-Xy-BTD and Hex-Ph-Xy-BTD crystals, along with the study of the quantum yield and fluorescence lifetime.
研究了由2,1,3-苯并噻唑衍生的线性共轭分子,特别是4,7-二(2,5-二甲基-[1,1'-联苯]-4-基)苯并噻唑(Ph-Xy-BTD)和4,7-二(4'-己基-2,5-二甲基-[1,1'-联苯]-4-基)苯并噻唑(hexx -Ph-Xy-BTD)的结晶和吸收/荧光性质。报道了一种新的Hex-Ph-Xy-BTD衍生物的合成。结果表明,与Ph-Xy-BTD相比,Hex-Ph-Xy-BTD中末端n-己基取代基的存在降低了熔融温度,提高了溶解度,对结晶有积极的影响。在正己烷溶液中生长出了hexx -Ph-Xy-BTD单晶,并用x射线单晶衍射分析了其结构,证实了其为单斜晶系(sp. gr. P21/c, Z = 4)。对四氢呋喃溶液、Ph-Xy-BTD和hexx -Ph-Xy-BTD晶体的吸收光谱和荧光光谱进行了分析,并对其量子产率和荧光寿命进行了研究。
期刊介绍:
Crystallography Reports is a journal that publishes original articles short communications, and reviews on various aspects of crystallography: diffraction and scattering of X-rays, electrons, and neutrons, determination of crystal structure of inorganic and organic substances, including proteins and other biological substances; UV-VIS and IR spectroscopy; growth, imperfect structure and physical properties of crystals; thin films, liquid crystals, nanomaterials, partially disordered systems, and the methods of studies.