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首页> 外文期刊>Chemistry: A European journal >Amphiphilic Inclusion Spaces for Various Guests and Regulation of Fluorescence Intensity of 1,8-Bis(4-aminophenyl)anthracene Crystals
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Amphiphilic Inclusion Spaces for Various Guests and Regulation of Fluorescence Intensity of 1,8-Bis(4-aminophenyl)anthracene Crystals

机译：不同客体的两亲性包含空间和1,8-双（4-氨基苯基）蒽晶体的荧光强度调节

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摘要

A host framework for inclusion of various guest molecules was investigated by preparation of inclusion crystals of 1,8-bis(4-aminophenyl)anthracene (1,8-BAPA) with organic solvents. X-ray crystallographic analysis revealed construction of the same inclusion space incorporating 1,8-BAPA and eight guest molecules including both non-polar (benzene) and polar guests (N,N-dimethylformamide, DMF). Fluorescence efficiencies varied depending on guest molecule polarity; DMF inclusion crystals exhibited the highest fluorescence intensity (Ф_F=0.40), four times as high as that of a benzene inclusion crystal (Ф_F=0.10). According to systematic investigations of inclusion phenomena, strong host– guest interactions and filling of the inclusion space led to a high fluorescence intensity. Temperature-dependent fluorescence spectral measurements revealed these factors effectively immobilised the host framework. Although hydrogen bonding commonly decreases fluorescence intensity, the present study demonstrated that such strong interactions provide excellent conditions for fluorescence enhancement. Thus, this remarkable behaviour has potential application toward sensing of highly polar molecules, such as biogenic compounds.
机译：通过用有机溶剂制备1,8-双（4-氨基苯基）蒽（1,8-BAPA）的包裹体晶体，研究了包含各种客体分子的主体框架。 X射线晶体学分析揭示了包含1,8-BAPA和八个客体分子（包括非极性（苯）和极性客体（N，N-二甲基甲酰胺，DMF））的相同包含空间的构造。荧光效率取决于客体分子的极性; DMF夹杂物晶体具有最高的荧光强度（Ф_F= 0.40），是苯夹杂物晶体（Ф_F= 0.10）的四倍。根据对夹杂物现象的系统研究，强烈的宿主-客体相互作用和夹杂物空间的填充导致较高的荧光强度。温度依赖性荧光光谱测量显示这些因素有效地固定了宿主框架。尽管氢键通常会降低荧光强度，但本研究表明这种强相互作用为荧光增强提供了极好的条件。因此，这种非凡的行为在感应高极性分子（如生物化合物）方面具有潜在的应用前景。

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