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

Author(s)

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]

Affiliation

^[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

• Document type: Journal article
• Source: Inorganic Chemistry; v. 58, n. 8, p. 4962-4971, APR 15 2019.
• Web of Science Citations: 0

Abstract

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