Strongly Coupled Phenazine-Porphyrin Dyads: Light-Harvesting Molecular Assemblies with Broad Absorption Coverage

Shin Hee Lee, Adam J. Matula, Gongfang Hu, Jennifer L. Troiano, Christopher J. Karpovich, Robert H. Crabtree, Victor S. Batista, Gary W. Brudvig

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The development of light-harvesting architectures with broad absorption coverage in the visible region continues to be an important research area in the field of artificial photosynthesis. Here, we introduce a new class of ethynyl-linked panchromatic dyads composed of dibenzophenazines coupled ortho and meta to tetrapyrroles with an anchoring group that can be grafted onto metal oxide surfaces. Quantum chemical calculations and photophysical measurements of the synthesized materials reveal that both of the dibenzophenazine dyads absorb broadly from 300 to 636 nm and exhibit absorption bands different from those of the constituent chromophore units. Moreover, the different points of attachment of dibenzophenazines to tetrapyrroles give different absorption profiles which computations suggest result from differences in the planarity of the two dyads. Applicability of the dyads in artificial photosynthesis systems was assessed by their incorporation and characterization of their performance in dye-sensitized solar cells.

Original languageEnglish
Pages (from-to)8000-8008
Number of pages9
JournalACS Applied Materials and Interfaces
Volume11
Issue number8
DOIs
Publication statusPublished - Feb 27 2019

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Keywords

  • artificial photosynthesis
  • dyads
  • panchromatic dyes
  • phenazines
  • porphyrins

ASJC Scopus subject areas

  • Materials Science(all)

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