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Updated: Aug 22, 2025

Preparation of Stable Bicyclic Aziridinium Ions and Their Ring-Opening for the Synthesis of Azaheterocycles
Published on: August 22, 2018
Dual-State Emission of 2-(Butylamino)Cinchomeronic Dinitrile Derivatives
Konstantin V Lipin1, Mikhail Yu Ievlev1, Anastasiya I Ershova1
1Department of Organic and Pharmaceutical Chemistry, Chuvash State University, Moskovsky pr. 15, Cheboksary 428015, Russia.
Abstract:
New representatives of 2-(butylamino)cinchomeronic dinitrile derivatives were synthesized as promising fluorophores showing dual-state emission. To characterize the influence of the length (from methyl to butyl) and the structure (both linear and branched) of the alkyl substituent at the amino nitrogen atom, the spectral fluorescence properties of all synthesized compounds were carefully studied both in solution and in solid state. The highest photoluminescence quantum yield values of 63% were noted for solutions of 2-(butylamino)-6-phenylpyridine-3,4-dicarbonitrile in DCM and 2-(butylamino)-5-methyl-6-phenylpyridine-3,4-dicarbonitrile in toluene.
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