Evaluation of processes photoassisted by Ru(II) and Re(I) polypyridyl compounds

• Grant number: 16/24020-9
• Support type: Scholarships in Brazil - Doctorate
• Effective date (Start): May 01, 2017
• Effective date (End): October 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: André Sarto Polo
• Grantee: Andressa Vidal Muller
• Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
• Associated scholarship(s): 18/08038-0 - Investigation of electron transfer processes for energy conversion systems based on Ru(II)/Re(I), BE.EP.DR

Abstract

Coordination compounds are suitable for their use in solar energy conversion and storage due to the possibility of incorporating different ligands into metal centers to modify their light absorption, redox and reactivity properties and to form subunits with specific functionalities. Ru(II) polypyridyl compounds are extensively investigated to convert solar energy to electrical energy in Dye-Sensitized Solar Cells (DSSCs) and changes in ligands directly affects the performance of the devices. Solar energy can also be stored in chemical bonds using Re(I) polypyridyl compounds as photocatalysts and changes in the structure of these compounds modify their efficiency, selectivity and stability. This project aims to evaluate the properties of Ru(II) and/or Re(I) polypyridyl coordination compounds in systems for solar energy conversion in electrical or chemical energy. This project aims to synthesize and characterize Ru(II) tris-heteroleptic polypyridyl compounds and evaluate the effects of changes in ligands on the chemical, electrochemical and photoelectrochemical behavior of the compounds in DSSCs. It is also objective of this project to synthesize and characterize mononuclear Re(I) polypyridyl compounds and binuclear Re(I)Ru(II) compounds aiming to correlate systematic changes in ligands with their photophysical and photochemical properties and its photocatalytic activity in CO2 reduction to other products, both in homogeneous medium and immobilized in nanostructures. Thus, it will be possible to establish relations between changes in the structure of the molecules with their properties and to understand more deeply the effects that govern these energy conversion systems. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MUELLER, ANDRESSA V.; DE OLIVEIRA, KLEBER T.; MEYER, GERALD J.; POLO, ANDRE S. Inhibiting Charge Recombination in cis-Ru(NCS)(2) Diimine Sensitizers with Aromatic Substituents. ACS APPLIED MATERIALS & INTERFACES, v. 11, n. 46, p. 43223-43234, NOV 20 2019. Web of Science Citations: 0.

DE SOUZA, ALINE A. N.; SILVA, NATHALIA S.; MUELLER, ANDRESSA V.; POLO, ANDRE S.; BROCKSOM, TIMOTHY J.; DE OLIVEIRA, KLEBER T. Porphyrins as Photoredox Catalysts in Csp(2)-H Arylations: Batch and Continuous Flow Approaches. Journal of Organic Chemistry, v. 83, n. 24, p. 15077-15086, DEC 21 2018. Web of Science Citations: 5.

MUELLER, ANDRESSA V.; POLO, ANDRE S. Mechanistic Insights into the Stepwise Assembly of Ruthenium(II) Tris-heteroleptic Compounds. Inorganic Chemistry, v. 57, n. 21, p. 13829-13839, NOV 5 2018. Web of Science Citations: 2.

VEIGA, ELAINE TEIXEIRA; MUELLER, ANDRESSA VIDAL; RAMOS, LUIZ DUARTE; MORELLI FRIN, KARINA PASSALACQUA; POLO, ANDRE SARTO. Interrelationship between the Ancillary Ligand Structure, Acid-Base Properties, and TiO2 Surface Coverage of Ru-II Dyes. European Journal of Inorganic Chemistry, n. 23, p. 2680-2688, JUN 22 2018. Web of Science Citations: 1.