Control of aggregates and their colors of acene molecules in the solid state utilizing self-assembly of alkyl side chains

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Alkyl side chains have abilties to form self-aggregations. We have parepared a series of new tetracene molecules having alkyl side chains so as to control molecular arrangements and photophysical properties in the solid state by alkyl side chains. We observed that the shape and position of alkyl side chains, further mixing isomers could tune color tones and fluorescence quantum yields. We concluded that the alkyl side chain is one of critical factors to control the solid-state optical properties.