1. A single isomer rotary switch demonstrating anti-Kasha behaviour: Does acidity function matter?
- Author
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Nikolay Vassilev, Anton Georgiev, Vera Deneva, Dancho Yordanov, Ivan Angelov, Daniela Nedeltcheva, Liudmil Antonov, Liudmil Antonov, Nikolay Vassilev, and Anton Georgiev
- Subjects
chemistry.chemical_classification ,010405 organic chemistry ,Rotary switch ,General Physics and Astronomy ,Hydrazone ,010402 general chemistry ,Ring (chemistry) ,Photochemistry ,01 natural sciences ,Single isomer ,0104 chemical sciences ,anti-Kasha ,chemistry ,Nitrogen atom ,rotory swithes ,Physical and Theoretical Chemistry ,Acidity function ,Ground state ,Proton acceptor - Abstract
A novel rotary switch, overcoming the disadvantages of hydrazone based switches with competitive proton acceptor sub-rotors, has been designed. The new compound contains a pyridyl ring and a COOH group as sub-rotors, which provides engagement of the pyridyl nitrogen atom and leads to the existence of a single isomer in the ground state. The availability of acidic functionality in the rotor creates conditions for excited state intramolecular proton transfer (ESIPT), which exhibits anti-Kasha behavior.
- Published
- 2021