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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.)

Photoluminescent properties of the europium and terbium complexes covalently bonded to functionalized mesoporous material PABA-MCM-41

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Author(s):
Costa, Jose Arnaldo S. [1] ; de Jesus, Roberta A. [2] ; Dorst, Diane D. [1] ; Pinatti, Ivo M. [1] ; Oliveira, Lucas M. da R. [1] ; de Mesquita, Maria E. [3] ; Paranhos, Caio Marcio [1]
Total Authors: 7
Affiliation:
[1] Univ Fed Sao Carlos, Dept Chem, Sao Carlos, SP - Brazil
[2] Univ Fed Alagoas, Inst Chem & Biotechnol, BR-57072970 Maceio, Alagoas - Brazil
[3] Univ Fed Sergipe, Dept Chem, BR-49100000 Sao Cristovao, Sergipe - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Luminescence; v. 192, p. 1149-1156, DEC 2017.
Web of Science Citations: 8
Abstract

In this study, we describe the synthesis of the functionalized inorganic-organic material p-aminobenzoic acid MCM-41 by modification from p-aminobenzoic acid (PABA) and the covalently immobilization with rare earths (Eu3+, Tb3+) is also reported. The mechanism for the formation of the PABA-MCM-41 is known as the ``Liquid Crystal Templating{''} (LCT) in which the liquid crystal molecules of a surfactant works as an organic template in the formation of the hexagonal structure. The complexes were characterized by FTIR, XRD, SAXS, N-2 adsorption/desorption, TGA, SEM, and luminescence analyses. The mesoporous materials exhibited the hexagonal mesostructures typical of the M41S family, as confirmed by XRD and SAXS, with high surface areas and thermal stability. The luminescent properties of the Tb-PABA-MCM-41 and Eu-PABA-MCM-41 complexes were more efficient, compared with pure Tb(PABA)(3) and Eu(PABA)(3) complexes, respectively. The more intense emissions are observed when the system is excited at the transition of the ligand. The lifetimes data of the Tb-PABA-MCM-41 complex presents longer lifetime (0.26 ms) than Eu-PABA-MCM-41 complex (0.12 ms). (AU)

FAPESP's process: 14/05679-4 - Development of silica-based mesoporous materials from biomass for use as remediation system for polycyclic aromatic hydrocarbon (PAH's)
Grantee:José Arnaldo Santana Costa
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 13/23995-8 - Synthesis of silver tungstate doped with Eu3+ and the study of their optical, photoluminescent and photocatalytic properties
Grantee:Ivo Mateus Pinatti
Support Opportunities: Scholarships in Brazil - Doctorate