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Updated: Mar 29, 2026

Synthesis of pH Dependent Pyrazole, Imidazole, and Isoindolone Dipyrrinone Fluorophores using a Claisen-Schmidt Condensation Approach
Published on: June 10, 2021
Isomers of Pyrene-Imidazole Compounds: Synthesis and Configuration Effect on Optical Properties
Yulong Liu1, Tong Shan1, Liang Yao1
1State Key Laboratory of Supramolecular Structure and Materials, Jilin University , 2699 Qianjin Avenue, Changchun 130012, China.
Abstract:
Two pyrene-imidazole-based structural isomers, axisymmetric syn-PyDTI and centrosymmetric anti-PyDTI, have been easily produced and successfully separated in a one-pot reaction. Crystalline syn-PyDTI exhibited a 2-fold higher quantum efficiency than anti-PyDTI and displayed a much better performance in OLEDs with a ηc.max of 11.4 cd A(-1) (8.8 cd A(-1) for anti-PyDTI), although they possess the same apparent electronic structure. Observations revealed that the molecular excited-state properties are derived from distinct structural symmetries.
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