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Cover Feature: Enhancing Light‐Absorption and Luminescent Properties of Non‐Emissive 1,3,4,6,9b‐Pentaazaphenalene through Perturbation of Forbidden Electronic Transition by Boron Complexation (Asian J. Org. Chem. 2/2020)
Author(s) -
Watanabe Hiroyuki,
Kawano Yuki,
Tanaka Kazuo,
Chujo Yoshiki
Publication year - 2020
Publication title -
asian journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.846
H-Index - 44
eISSN - 2193-5815
pISSN - 2193-5807
DOI - 10.1002/ajoc.202000042
Subject(s) - chemistry , luminescence , atomic orbital , boron , molecular orbital , perturbation (astronomy) , molecular electronic transition , cover (algebra) , wavelength , atomic electron transition , molecule , photochemistry , chemical physics , molecular physics , optoelectronics , quantum mechanics , physics , spectral line , organic chemistry , mechanical engineering , engineering , electron
A molecular design for transforming non‐emissive molecules to luminescent dyes is demonstrated. By boron complexation, symmetry of molecular electronic orbitals was drastically changed. As a result, electronic transition between frontier orbitals with the forbidden character was perturbed. Finally, the luminescent property can be induced. In the manuscript, the emission band in the long wavelength region can be successfully detected by employing a small heterocyclic system consisting of pentaazaphenalene. According to the data from optical measurements and quantum calculations, the validity of this strategy is demonstrated. More information can be found in the Full Paper by Kazuo Tanaka et al. on page 259 in Issue 2, 2020 (DOI: 10.1002/ajoc.202000010).