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Rational Design of Dual-State Emission Luminogens with Solvatochromism By Combining Partially Shared Donor-Acceptor Pattern and Twisted Structures.

We report a general design strategy for a new class of luminogens with dual-state emission (DSEgens) referring to be brightly emissive in both solution and solid and solvatochromism properties by constructing partially shared donor-acceptor pattern based on a twisted molecule. The DSEgens with bright fluorescence emission in both solid and solution states demonstrate a unique solvatochromism behaviour depending on solvent polarity and promising applications in anti-counterfeiting.