A tunable photoluminescence system consisting of liquid-crystalline trans-alkoxy-nitrostilbenes with n-alkyl chains

作者：Chen Chien Chih; Hinoue Tomoaki; Hisaki Ichiro; Miyata Mikiji; Tohnai Norimitsu^*

来源：Tetrahedron Letters, 2013, 54(13): 1649-1653.

DOI：10.1016/j.tetlet.2013.01.013

• Alkoxy-nitrostilbene
• Photoluminescence
• Solid state
• Liquid crystals
• Structure-property correlation

A correlation between molecular arrangements and photoluminescence properties of trans-alkoxy-nitrostilbenes with n-alkyl chains was elucidated in their crystalline and liquid-crystalline states. In the former states, alternately stacked acceptor-acceptor assemblies caused fluorescence emission with eight percent quantum yield at maximum, while the donor-acceptor ones with less than one percent. Heat treatment yielded their liquid-crystalline assemblies comprising J-aggregation with yellow emissions. The emissions were red-shifted by about 20-40 nm as compared with those of their crystalline assemblies. Such temperature-dependent structural changes enable us to tune the emission colors.

• 出版日期2013-3-27