Highly emissive host-guest based on nanoclay intercalated with an Eu3+ complex bearing a new Ru2+ organometallic ligand

Autor(es)

Celedon, Salvador ^[1] ; de Camargo, Andrea S. S. ^[2] ; Fuentealba, Mauricio ^[3] ; Artigas, Vania ^[3] ; Benavente, Eglantina ^{[4, 5]} ; Gonzalez, Guillermo ^[1]

Afiliação do(s) autor(es)

^[1] Univ Chile, Dept Quim, POB 653, Santiago - Chile

^[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

^[3] Pontificia Univ Catolica Valparaiso, Inst Quim, Lab Cristalog, Ave Univ 330, Valparaiso - Chile

^[4] Univ Tecnol Metropolitana, Dept Quim, POB 9845, Santiago - Chile

^[5] Univ Tecnol Metropolitana, Programa Inst Fomento I D I, Ignacio Valdivieso 2409, POB 8940577, Santiago - Chile

• Tipo de documento: Artigo Científico
• Fonte: NEW JOURNAL OF CHEMISTRY; v. 42, n. 18, p. 15284-15294, SEP 21 2018.
• Citações Web of Science: 2

Resumo

This work describes the design, synthesis and physicochemical properties of the highly emissive nanocomposite {[}bentonite]{[}Eu[((5)-Cp{*})Ru((6)-bzac)](3)Phen](0.09){[}H2O](0.22) based on the Eu(iii) complex {[}Eu[((5)-Cp{*})Ru((6)-bzac)](3)Phen]{[}PF6](3), bearing a new Ru(ii) organometallic -diketone ligand {[}((5)-Cp{*})Ru((6)-Hbzac)]{[}PF6], intercalated into bentonite-Na+ nanoclay. Single crystal X-ray diffraction analysis of the ligand showed that the {[}((5)-Cp{*})Ru](+) is bound to the phenyl group of a highly planar and conjugated organic -diketone 1-phenyl-1,3-butanedione (Hbzac) through (6)-coordination. The complex was inserted into bentonite-Na+ by ion exchange reactions at room temperature. The products display interlaminar distances and stoichiometries in agreement with the ion exchange capacity and the interlayer space available in the clay. Thermal gravimetric analysis was used to establish the decomposition temperatures of the complex and the nanocomposite, which exceed or border 280 degrees C. Both compounds exhibit luminescence of high colorimetric purity in the red region. The intensity of the characteristic narrow emission band of Eu3+ in the red region, corresponding to D-5(0) F-7(2) transition, is accentuated in the intercalated nanocomposite, reaching a symmetry parameter R = I(D-5(0) F-7(2))/I(D-5(0) F-7(1)) and Judd-Ofelt (2) parameter approximately three and two times larger respectively than that of the starting complex. The ruthenium(ii)-europium(iii) based nanocomposite is presented as a potential luminescent material with considerably high stability over time. (AU)

• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs