Cyclic 2,12-porphyrinylene nanorings as a porphyrin analogue of cycloparaphenylenes

Hua Wei Jiang, Takayuki Tanaka, Hirotaka Mori, Kyu Hyung Park, Dongho Kim, Atsuhiro Osuka

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

β-to-β Directly linked cyclic Ni(II) porphyrin trimer, tetramer, and pentamer ([3]CP, [4]CP, and [5]CP) have been synthesized by reaction of a 2,12-diborylated Ni(II) porphyrin with Pt(cod)Cl2 followed by reductive elimination. The structures of these cyclic porphyrin arrays have been revealed by X-ray diffraction analysis. The strain energies of these cyclic oligomers are calculated to be 77, 57, and 47 kcal/mol for [3]CP, [4]CP, and [5]CP, respectively. Intramolecular excitation energy hopping was observed between the 3(d,d) states of the Ni(II) porphyrins with rates of 3.0, 4.4, and 4.6 ps for [3]CP, [4]CP, and [5]CP, respectively, reflecting the close proximity of the Ni(II) centers.

Original languageEnglish
Pages (from-to)2219-2222
Number of pages4
JournalJournal of the American Chemical Society
Volume137
Issue number6
DOIs
Publication statusPublished - 2015 Feb 18

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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