Thermodynamic Self-Assembly of Two-Dimensional φ-Conjugated Metal-Porphyrin Covalent Organic Frameworks by "On-Site" Equilibrium Polymerization

Ryota Tanoue, Rintaro Higuchi, Kiryu Ikebe, Shinobu Uemura, Nobuo Kimizuka, Adam Z. Stieg, James K. Gimzewski, Masashi Kunitake

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Two-dimensional-conjugated metal-porphyrin covalent organic frameworks were produced in aqueous solution on an iodine-modified Au(111) surface by "on-site" azomethine coupling of FeIII- 5,10,15,20-tetrakis(4- aminophenyl)porphyrin (FeTAPP) with terephthal dicarboxaldehyde and investigated in detail using in-situ scanning tunneling microscopy. Mixed covalent organic porphyrin frameworks consisting of FeTAPP and metal-free TAPP (H2TAPP) were prepared through simultaneous adsorption in a mixed solution as well as partial replacement of FeTAPP by H2TAPP in an as-prepared metal-porphyrin framework. In the mixed framework, the relative distribution of FeTAPP to H2TAPP was not random and revealed a preference for homo-connection rather than heteroconnection. The construction of substrate-supported,-conjugated covalent frameworks from multiple building blocks, including metal centers, will be of significant utility in the design of functional molecular nanoarchitectures

Original languageEnglish
Pages (from-to)2211-2216
Number of pages6
JournalJournal of nanoscience and nanotechnology
Volume14
Issue number3
DOIs
Publication statusPublished - Mar 1 2014

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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