Tsuchiya T, Hamano T, Inoue M, Nakamura T, Wakamiya A, Mazaki Y. Intense absorption of azulene realized by molecular orbital inversion.
Chem Commun (Camb) 2023;
59:10604-10607. [PMID:
37528776 DOI:
10.1039/d3cc02311g]
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Abstract
The introduction of diarylamino groups at the 2- and 6-positions of azulene was found to invert the order of the orbital energy levels and allowed the HOMO-LUMO transition, resulting in a substantial increase in absorbance in the visible region. In addition, the stability of their one-electron oxidised species was improved by introducing bromine or methoxy groups at the 1- and 3-positions.
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