Photoluminescence study of Cu3BTC2 porous crystals MOFs with rare earth ions.

• Grant number: 11/19352-9
• Support Opportunities: Scholarships in Brazil - Post-Doctorate
• Effective date (Start): June 01, 2012
• Effective date (End): July 31, 2015
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Principal Investigator: Hermi Felinto de Brito
• Grantee: Danilo Mustafa
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated scholarship(s): 13/13060-1 - Luminescent mesostructured double layered hydroxides(LDH)hosting ion exchanged organic sensitizers, BE.EP.PD

Abstract

The luminescent materials based on rare earth (TR3+) displays emission with monochromatic colors and usually have high quantum yields. TR3+ ions have extremely thin emission bands originated from the intra-shell 4f-4f transitions. This project consists of preparation and study of photoluminescence of porous crystals CU3(BTC=1,3,5-benzene-tricarboxylic-acid)2 - Metal Organic Frameworks (MOFs) with H3PW12O40 (phosphotungstic acid - HPA) and trivalent rare earth ions (TR3+ = Sm3+, Eu3+, GD3+, Tb3+ and Tm3+). TR3+ ions will be incorporated into Cu3BTC2 by diffusion through the pores of the material until the main cavity of the structure which contains the keggin type heteropolyacid (HPA), where an ion exchange occurs. These systems are part of an important class of compounds used in the development of advanced luminescent materials and photonic applications such as optical markers, light conversion molecular devices (LCMD). These new luminescent materials offer different characteristics leading to greater flexibility of structures, and therefore, very versatile in terms of their optical properties. This project will investigate the spectroscopic properties of luminescent materials based on: i) the structure of energy levels of ions TR ii) in the processes of energy transfer and/or charge and iii) optical properties - Lifetime, quantum emission yields and experimental intensity parameters.