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TICT (twisted intramolecular charge transfer) compounds are characterized by showing a rotation around a single bond in the excited state: starting from an almost planar geometry in the ground state, a twisted system is formed in the electronic excited state. The previously reported PLICT (planarized intramolecular charge transfer) compounds show inverse behavior: starting from a twisted geometry...
The concept of the PLATICT state is illustrated in the image. The key element is a fluorophore containing two donor (blue) and two acceptor groups (red). Absorption of UV light leads to an intramolecular charge transfer state, which is stabilized by two independent rotations. The result is the formation of the planarized and twisted intramolecular charge transfer (PLATICT) state. Due to the twofold...
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