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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.)

Grafting of L-proline and L-phenylalanine amino acids on kaolinite through synthesis catalyzed by boric acid

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Author(s):
de Araujo, Denis T. [1] ; Ciuffi, Katia J. [1] ; Nassar, Eduardo J. [1] ; Vicente, Miguel A. [2] ; Trujillano, Raquel [2] ; Rives, Vicente [2] ; Bernal, Elena P. [2] ; de Faria, Emerson H. [1]
Total Authors: 8
Affiliation:
[1] Univers Dade Franca, Grp Pesquisas Mat Lamelares Hibridos GPMatLam, Av Dr Armando Salles Oliveira, BR-14404600 Franca, SP - Brazil
[2] Univ Salamanca, Dept Quim Inorgan, GIR QUESCAT, Salamanca 37008 - Spain
Total Affiliations: 2
Document type: Journal article
Source: APPLIED SURFACE SCIENCE ADVANCES; v. 4, JUN 1 2021.
Web of Science Citations: 0
Abstract

The amidation reaction catalyzed by boric acid between the amino acids proline and phenylalanine and the alkoxide 3-aminopropyltriethoxysilane was studied. Afterwards, the modified alkoxide was used to functionalize the clay mineral kaolinite. The hybrid material was characterized by powder X-ray diffraction, molecular absorption spectroscopy in the infrared region, thermal analysis and scanning electron microscopy, to understand the influence of the reaction time on the kaolinite intercalation process, in order to improve this functionalization route for both amino acids. The reaction times evaluated varied from 0 to 24 h, keeping the reflux temperature fixed at 180 degrees C, being then reacted with kaolinite previously intercalated with dimethyl sulfoxide (DMSO). After 24 h of reaction the modified alkoxide interacted effectively, replacing the DMSO molecules and resulting in the formation of covalent bonds between the modified alkoxide and the clay. The material showed greater dispersion of the organic phase along the layered matrix, and significantly increased its thermal stability, with maximum loss at 320 degrees C. The sample containing phenylalanine was more agglomerated than that containing proline, with 2.4 times in mol number. In all cases, the crystallinity of the material decreased by the interaction of the modified alkoxide with the kaolinite matrix, the modified alkoxide being partially outside the interlayer space because of its large molecular size. (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: 16/01501-1 - Multifunctional catalysts for advanced oxidation processes employing biogenic matrices or clays
Grantee:Katia Jorge Ciuffi Pires
Support type: Regular Research Grants
FAPESP's process: 17/01719-0 - Biohybrid materials (kaolinite-amino acid) as luminescent sensors for emerging pollutants
Grantee:Denis Talarico de Araujo
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 05/00720-7 - Synthesis, characterization and catalytic activity of biomimetic and non-biomimetic systems, in hydrocarbon oxidation, using hydrogen peroxide as oxidant
Grantee:Katia Jorge Ciuffi Pires
Support type: Regular Research Grants
FAPESP's process: 11/03335-8 - Ironporphyrins as catalysts in oxidation reaction of cyclohexane and Baeyer-Villeger: heterogeneous systems
Grantee:Katia Jorge Ciuffi Pires
Support type: Regular Research Grants
FAPESP's process: 12/11673-3 - Thin films obtained by spin and dip-coating using sol-gel methodology
Grantee:Eduardo José Nassar
Support type: Regular Research Grants
FAPESP's process: 18/26569-3 - Biohybrid materials (kaolinite-amino acids) as luminescent sensors for organic emmerging pollutants.
Grantee:Denis Talarico de Araujo
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 17/15482-1 - Novel strategies synthesis to reuse Tanner industry by-products to obtain high-value functional porous materials
Grantee:Emerson Henrique de Faria
Support type: Regular Research Grants