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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tetracarboxyphenylporphyrin-Kaolinite Hybrid Materials as Efficient Catalysts and Antibacterial Agents

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Author(s):
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de Carvalho, Analaura Lovo [1] ; Ferreira, Breno F. [1] ; Gomes Martins, Carlos H. [1] ; Nassar, Eduardo J. [1] ; Nakagaki, Shirley [2] ; Machado, Guilherme Sippel [2] ; Rives, Vicente [3] ; Trujillano, Raquel [3] ; Vicente, Miguel A. [3] ; Gil, Antonio [4] ; Korili, Sophia A. [4] ; de Faria, Emerson H. [1] ; Ciuffi, Katia J. [1]
Total Authors: 13
Affiliation:
[1] Univ Franca, Grp Sol Gel, Franca, SP - Brazil
[2] Univ Fed Parana, DQ, BR-80060000 Curitiba, Parana - Brazil
[3] Univ Salamanca, GIR QUESCAT, Dept Quim Inorgan, E-37008 Salamanca - Spain
[4] Univ Publ Navarra, Dept Quim Aplicada, Pamplona - Spain
Total Affiliations: 4
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 118, n. 42, p. 24562-24574, OCT 23 2014.
Web of Science Citations: 11
Abstract

The preparation, characterization, and application in oxidation reactions and antibacterial activity of new biomimetic heterogeneous materials are reported. Brazilian Sao Simao kaolinite has been functionalized with Fe(III)-{[}meso-tetrakis(tetracarboxyphenyl)porphinato], {[}FeTCPP]. Clay functionalization with FeTCPP was confirmed by the amide bands observed in the FTIR spectrum, while UVvis spectroscopy revealed a red-shift of the characteristic Soret band of the iron porphyrin compared to the parent iron porphyrin in solution, an evidence of Fe-III-porphyrin -> Fe-II-porphyrin reduction. Both catalysts reveal complete selectivity for the epoxide in the epoxidation of cis-cyclooctene, while in the BaeyerVilliger (BV) oxidation of cyclohexanone reached 50% conversion (100% selectivity to e-caprolactone). The catalysts were recovered and used as antibacterial agents against various bacteria, with activity comparable to that of commercial products such as streptomycin. These results demonstrated that smart multifunctional hybrid organicinorganic materials that satisfy the demands of Green Chemistry with maximum usability and environmental compatibility can be designed via functionalization of kaolinite. (AU)

FAPESP's process: 13/19523-3 - Functional Biohybrid materials based on layered and/or fibrous natural clays with multifaceted applications
Grantee:Emerson Henrique de Faria
Support type: Regular Research Grants
FAPESP's process: 11/17660-8 - Study of the catalytic properties of Co2+, Mn2+ and Ni2+ dipicolinate complexes immobilized on kaolinite
Grantee:Francielle Rodrigues Araújo
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 13/50216-0 - New clay-based materials with advanced technological and environmental applications
Grantee:Katia Jorge Ciuffi Pires
Support type: Regular Research Grants