Photoreactivity and kinetic formation of ruthenium (II) tris-heteroleptic compounds

• Grant number: 13/25173-5
• Support Opportunities: Regular Research Grants
• Start date: March 01, 2014
• End date: February 29, 2016
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Principal Investigator: André Sarto Polo
• Grantee: André Sarto Polo
• Host Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil

Abstract

Ruthenium(II) polypyridyl compounds have favorable characteristics to be used in solar energy conversion processes such as their wide and intense absorption in the visible region of the spectrum. Molecular engineering and the use of different ligands allow the tuning of energy level of these compounds in order to perform useful functions in a more efficient way. An example is the tuning of the photoinduced electron transfer process, which is the initial step for solar energy conversion into electricity or in substances that have higher energy content. Ruthenium(II) tris-heteroleptic compounds are very interesting in this field since they allow to evaluate how the use of different ligand change their global properties and allow the modulation of their energy levels. This project aims to synthesize and characterize some ruthenium(II) tris-heteroleptic compounds having the general formulae cis-[Ru(RN-phen)(dcbH2)(NCS)2]; R = electron donor or withdrawing substituents, dcbH2 = 4,4'-dicarboxylic acid-2,2'-bipyridyl, as well as to carry out investigation about their photoreactivity aiming energy conversion processes. Another goal of this project is to evaluate the influence of different ligands on formation kinetic of the complexes and, using this knowledge, improve the synthetic preparation route. Through the photoreactivity and kinetic behavior the effect of the 1,10-phenanthroline substituent will be rationalized. By this way it will be possible to understand the behavior of the species and modulate their properties aiming the improvement of the desired functions on the light energy conversion process into electrical or chemical output. (AU)

Scientific publications

(6)

(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)

SAMPAIO, RENATO N.; MUELLER, ANDRESSA V.; POLO, ANDRE S.; MEYER, GERALD J.. Correlation Between Charge Recombination and Lateral Hole-Hopping Kinetics in a Series of cis-Ru(phen `)(dcb)(NCS)(2) Dye-Sensitized Solar Cells. ACS APPLIED MATERIALS & INTERFACES, v. 9, n. 39, p. 33446-33454, OCT 4 2017. (15/00605-5, 13/25173-5)

MUELLER, ANDRESSA V.; RAMOS, LUIZ D.; FRIN, KARINA P. M.; DE OLIVEIRA, KLEBER T.; POLO, ANDRE S.. A high efficiency ruthenium(II) tris-heteroleptic dye containing 4,7-dicarbazole-1,10-phenanthroline for nanocrystalline solar cells. RSC ADVANCES, v. 6, n. 52, p. 46487-46494, 2016. (15/00605-5, 15/13149-8, 13/25173-5, 15/21110-4)

SAMPAIO, RENATO N.; MUELLER, ANDRESSA V.; POLO, ANDRE S.; MEYER, GERALD J.. Correlation Between Charge Recombination and Lateral Hole-Hopping Kinetics in a Series of cis-Ru(phen ')(dcb)(NCS)(2) Dye-Sensitized Solar Cells. ACS APPLIED MATERIALS & INTERFACES, v. 9, n. 39, p. 9-pg., 2017-10-04. (13/25173-5, 15/00605-5)

ANDRESSA V. MÜLLER; MÁRCIA R. GONÇALVES; LUIZ D. RAMOS; ANDRÉ S. POLO; KARINA P. M. FRIN. A importância do estado excitado 3MLCT de compostos de Ru(II), Re(I) e Ir(III) no desenvolvimento de fotossensores, oleds e fotorredução de CO2. Química Nova, v. 40, n. 2, p. 200-213, 2017-02-00. (13/25173-5, 15/00605-5, 15/13149-8)

MUELLER, ANDRESSA V.; MENDONCA, POLIANA S.; PARANT, STEPHANE; DUCHANOIS, THIBAUT; GROS, PHILIPPE C.; BELEY, MARC; POLO, ANDRE S.. Effects of Methyl-Substituted Phenanthrolines on the Performance of Ruthenium(II) Dye-Sensitizers. Journal of the Brazilian Chemical Society, v. 26, n. 11, p. 2224-2232, NOV 2015. (15/00605-5, 13/25173-5)

FIORITO, PABLO ALEJANDRO; POLO, ANDRE SARTO. A New Approach toward Cyanotype Photography Using Tris-(oxalato)ferrate(III): An Integrated Experiment. Journal of Chemical Education, v. 92, n. 10, p. 1721-1724, OCT 2015. (13/25173-5)