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首页> 外文期刊>Crystal growth & design >Pairwise Packing of Anthracene Fluorophore: Hydrogen-Bonding-Assisted Dimer Emission in Solid State
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Pairwise Packing of Anthracene Fluorophore: Hydrogen-Bonding-Assisted Dimer Emission in Solid State

机译：蒽荧光团的成对堆积：氢键结合的固态二聚体发射

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摘要

Anthracene derivatives possessing a carbamate group and an ester group at their 9- and 10-positions, respectively, were prepared to furnish pairwise packing of anthracene fluorophores in their crystal structures. They were nonluminescent in ethanol solution and showed AIE (aggregation-induced emission) in aqueous ethanol solution and in solid state. Crystal structure analysis of them showed that the H-bonding networks involved in their crystal structures could be classified into four patterns, H-bonding between the carbamate and the ester carbonyl (motif A), H-bonding between the carbamate and the ester oxygen atom (motif B), H-bonded cyclic dimer of carbamate moieties (motif C), and H-bonded chain among carbamate moieties (motif D). Compounds with pairwisely packed anthracene fluorophores showed dimer emission with the longer fluorescence wavelength than others without the pair formation. Fluorescence maximum wavelengths and lifetimes become longer proportional to the degree of overlapping of two facing anthracene pi-planes.
机译：制备分别在其9和10位具有氨基甲酸酯基和酯基的蒽衍生物，以在其晶体结构中提供蒽荧光团的成对堆积。它们在乙醇溶液中不发光，并在乙醇水溶液和固态下显示AIE（聚集诱导的发射）。它们的晶体结构分析表明，参与其晶体结构的H键网络可分为四种模式：氨基甲酸酯和酯羰基（基序A）之间的H键，氨基甲酸酯和酯氧原子之间的H键。 （基元B），氨基甲酸酯基团的H键合环状二聚体（基元C）和氨基甲酸酯基团之间的H键合链（基元D）。具有成对包装的蒽荧光团的化合物显示的二聚体发射具有比没有成对形成的其他化合物更长的荧光波长。荧光最大波长和寿命变得更长，与两个面对的蒽pi平面的重叠程度成正比。

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