Complementary Hydrogen Bonding Modulates Electronic Properties and Controls Self-Assembly of Donor/Acceptor Semiconductors

H. T. Black, N. Yee, Y. Zems, D. F. Perepichka

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A comprehensive investigation of the complementary H-bonding-mediated self-assembly between dipyrrolo[2,3-b:3′,2′-e]pyridine (P2P) electron donors and naphthalenediimide/perylenediimide (NDI/PDI) acceptors is reported. The synthesis of parent P2P and several aryl-substituted derivatives is described, along with their optical, redox, and single-crystal packing characteristics. The dual functionality of heteroatoms in the P2P/NDI(PDI) assembly, which act as proton donors/acceptors and also contribute to π-conjugation, leads to H-bonding-induced perturbation of electronic levels. Concentration-dependent NMR and UV/Vis spectroscopic studies revealed a cooperative effect of H-bonding and π–π stacking interactions. This H-bonding-mediated co-assembly of donor (D) and acceptor (A) components leads to a new charge-transfer (CT) absorption that can be controlled throughout the visible range. The electronic interactions between D and A were further investigated by time-dependent DFT, which provided insights into the nature of the CT transition. Electropolymerization of difuryl-P2P afforded the first conjugated polymer incorporating H-bonding recognition units in its main chain.

Original languageEnglish (US)
Pages (from-to)17251-17261
Number of pages11
JournalChemistry - A European Journal
Volume22
Issue number48
DOIs
StatePublished - Nov 21 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry

Keywords

  • donor–acceptor systems
  • hydrogen bonding
  • polymers
  • semiconductors
  • supramolecular chemistry

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