Periphery-fused chiral A2B-type subporphyrin

Shoma Hirokawa, Nagao Kobayashi, Soji Shimizu

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)


    Despite significant interest, the chiroptical properties of subporphyrins have rarely been investigated because chiral subporphyrins are elusive. Here, inherently chiral subporphyrins are elaborated by forming a fused pyran ring at the periphery of an A2B-type meso-aryl-substituted subporphyrin. Their circular dichroism (CD) properties are largely affected by the peripheral substituents and the dihedral angles between the meso-aryl substituents and the subporphyrin core: The β-perbromo subporphyrin with an orthogonal arrangement of the meso-phenyl substituents to the subporphyrin core exhibits weak CD signals corresponding to the Q bands, whereas the unsubstituted species with smaller dihedral angles shows relatively intense CD signals. A detailed structure-property relationship of these chiral subporphyrins was elucidated by time-dependent (TD) DFT calculations. This study reveals that the CD properties of chiral subporphyrins can be controlled by peripheral substitution and meso-aryl substituents.

    Original languageEnglish
    Article number1140
    Issue number4
    Publication statusPublished - Feb 2 2021

    All Science Journal Classification (ASJC) codes

    • Analytical Chemistry
    • Chemistry (miscellaneous)
    • Molecular Medicine
    • Pharmaceutical Science
    • Drug Discovery
    • Physical and Theoretical Chemistry
    • Organic Chemistry


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