Bifunctional porphyrin-based nano-metal-organic frameworks: Catalytic and chemosensing studies

Carla F. Pereira, Flávio Figueira, Ricardo F. Mendes, Joaão Rocha, Joseph T. Hupp, Omar K. Farha, Mário M.Q. Simoães, Joaão P.C. Tomé, Filipe A.Almeida Paz

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

The use of 5,10,15,20-tetrakis(p-phenylphosphonic acid)porphyrin (H10TPPA) as a linker in the preparation of porphyrin-based metal-organic frameworks (Por-MOFs) through coordination to lanthanides cations is reported. The resulting unprecedented materials, formulated as [M(H9TPPA)(H2O)x]Cl2·yH2O [x + y = 7; M3+ = La3+ (1), Yb3+ (2), and Y3+ (3)], prepared using hydrothermal synthesis, were extensively characterized in the solid-state, for both their structure and thermal robustness, using a myriad of solid-state advanced techniques. Materials were evaluated as heterogeneous catalysts in the oxidation of thioanisole by H2O2 and as chemosensors for detection of nitroaromatic compounds (NACs). Nano-Por-MOFs 1-3 proved to be effective as heterogeneous catalysts in the sulfoxidation of thioanisole, with Por-MOF 1 exhibiting the best catalytic performance with a conversion of thioanisole of 89% in the first cycle and with a high selectivity for the sulfoxide derivative (90%). The catalyst maintained its activity roughly constant in three consecutive runs. Por-MOFs 1-3 can be employed as chemosensors because of a measured fluorescence quenching up to 70% for nitrobenzene, 1,4-dinitrobenzene, 4-nitrophenol, and phenol, with 2,4,6-trinitrophenol exhibiting a peculiar fluorescence profile.

Original languageEnglish
Pages (from-to)3855-3864
Number of pages10
JournalInorganic Chemistry
Volume57
Issue number7
DOIs
Publication statusPublished - Apr 2 2018

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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