Abstract
AbstractSelf‐organized rhodamine aggregates prepared by wetting / dewetting process of an ethanol solution on a hydrophilic glass surface consistently exhibited fluorescence without quenching. Upon annealing, the aggregates exhibited an irreversible transition to quenched state, similar to H‐aggregate, whereas the fluorescence spectrum was unchanged. The as grown highly fluorescent aggregate is a novel aggregate, neither a J‐aggregate nor an H‐aggregate, showing a blue‐shifted excitation spectrum whereas the emission spectrum is similar to that of molecularly dispersed solution. This fluorescent aggregate was only realized in nonequilibrium by the rapid dewetting process. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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