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- W2894827210 abstract "Bisbenzofuro[2,3-b : 2′,3′-e]pyrazine (BBFPy) and its 2,8- and 3,9-di(tert-butyl)-substituted derivatives (2 a and 2 b) were synthesized by palladium-catalyzed intramolecular direct arylation as the key step. The effect of introduction of two tert-butyl groups to the BBFPy core at the different positions on the fluorescent properties was then investigated. The tert-butyl groups not only enhance the tractability with increasing solubility, but also induce different crystal-packing patterns as anticipated. The compounds 2 a and 2 b show relatively strong blue fluorescence in both the solution and solid state. The 2,8-isomer 2 a specifically exhibits a unique mechanochromism in the solid state; 2 a exhibits two crystalline forms, both of which show green fluorescence by grinding, while different self-recovering fluorescence patterns between them are observed by standing. The intriguing mechanochromism is rationally interpreted in terms of molecular arrangements determined by X-ray crystallography." @default.
- W2894827210 created "2018-10-12" @default.
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- W2894827210 date "2018-10-25" @default.
- W2894827210 modified "2023-10-14" @default.
- W2894827210 title "Effect of Substitution Pattern of <i>tert</i> -Butyl Groups in a Bisbenzofuropyrazine Core π-System on Optical Properties: Unique Mechanochromic Fluorescence Behavior" @default.
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- W2894827210 doi "https://doi.org/10.1002/cptc.201800189" @default.
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