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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.)

Photophysical Properties of Ir(III) Complexes Immobilized in MCM-41 via Templated Synthesis

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Zanoni, Kassio P. S. [1, 2] ; Vilela, Raquel R. C. [2] ; Silva, Igor D. A. [2] ; Murakami Iha, Neyde Y. [1] ; Eckert, Hellmut [2] ; de Camargo, Andrea S. S. [2]
Total Authors: 6
[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Lab Fotoquim & Conversao Energia, BR-05508900 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Inst Fis Sao Carlos, Lab Espectroscopia Mat Funcionais, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Inorganic Chemistry; v. 58, n. 8, p. 4962-4971, APR 15 2019.
Web of Science Citations: 0

In the search for understanding and improving the luminescence of optical materials based on Ir(III) complexes, three {[}Ir(C<\^{}>N)(2)(dnbp)](+) (dnbp = 4,4'-dinonyl-2,2'-bipyridine) emitters were immobilized in MCM-41 mesoporous nanoparticles. By taking advantage of the amphiphilic nature of {[}Ir(C<\^{}>N)(2)(dnbp)](+), the complexes were mixed with an appropriate surfactant and the resulting micelles served as templates for the synthesis of mesoporous silica host materials in a one-step sol-gel route. The MCM-encapsulated {[}Ir(C<\^{}>N)(2)(dnbp)](+) complexes present intense emissions with prominent rigidochromic spectral changes that are substantially less affected by O-2 as compared to methanolic solutions, with a thousand-fold decrease in quenching rate constants. These photophysical results points to a possible suitability of Ir(III)-complex-MCM-41 host-guest systems for possible future optoelectronic devices, rigidity optical sensors, or biological markers in different colors. (AU)

FAPESP's process: 18/05152-7 - Solution-processed charge-transport layers for efficient perovskite solar cells
Grantee:Kassio Papi da Silva Zanoni
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass
Grantee:Edgar Dutra Zanotto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 16/07706-4 - Nanocrystalline luminescent materials: new chemical concepts for energy conversion and sustainability
Grantee:Kassio Papi da Silva Zanoni
Support type: Scholarships in Brazil - Post-Doctorate