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Geometric deconstruction of core and electron activation of a π-system in a series of deformed porphyrins: mimics of heme

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Abstract

The predominant distortion of heme is responsible for its electronic activity, catalytic ability and spectral properties. In this work, altogether 12 new X-ray structures of saddled, waved and ruffled porphyrins are reported. Three types of deformed porphyrins as mimics of heme were evaluated and analyzed by geometric deconstruction, spectral comparison, and electrochemical tracking, which shows a unique relationship of deformation fashions and distortion degree to the geometry of the core and electron transfer ability of rings in these enzyme containing porphyrins. These mimics can adjust their core geometry for changing the structures of potential metals; while for rings themselves, they can also regulate the electron activity by switching the HOMO of the large π systems. These deformed porphyrins can be used as ideal mimics for heme. These findings help us to understand the principle and contribution of these deformations to electron transfer in catalytic oxidation and photoreactions. The nonplanar mimics have been synthesized through a modular synthetic approach under Adler–Longo or Lindsey condensation conditions.

Graphical abstract: Geometric deconstruction of core and electron activation of a π-system in a series of deformed porphyrins: mimics of heme

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Publication details

The article was received on 11 Aug 2018, accepted on 27 Sep 2018 and first published on 27 Sep 2018


Article type: Paper
DOI: 10.1039/C8OB01959B
Citation: Org. Biomol. Chem., 2018, Advance Article
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    Geometric deconstruction of core and electron activation of a π-system in a series of deformed porphyrins: mimics of heme

    Q. Liu, J. Zhang, M. Tang, Y. Yang, J. Zhang and Z. Zhou, Org. Biomol. Chem., 2018, Advance Article , DOI: 10.1039/C8OB01959B

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