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Studies about the use niobium pentachloride in multicomponent reactions toward the synthesis of dye-sensitizers with potential application in photoelectrochemical devices of Grätzel

Abstract

The incessant search for alternative energy sources has awakened the interest of various research groups in the entire world. Among the several renewable energy sources, the solar energy has been highlighted due to its great expansion capacity, being a promising renewable and sustainable energy source. Based on this idea, the development of organic dye-sensitized solar cells is receiving great attention on the scientific world, since it is based on devices that present a low cost for their production and present a good efficiency in the solar to electric energy conversion. Because of this, the synthetic organic chemistry arises as an excellent tool for developing dye-sensitized solar cells, enabling the synthesis of new types of dyes and through structural modifications in organic dyes already in use, the potentiation of the dyes in the solar to electric energy conversion. Therefore, in this Project we propose to study the obtainment of different coumarin and quinoline derivatives through multicomponent reactions promoted by the niobium pentachloride (NbCl5), verifying the effects of concentration of NbCl5 in the reaction time and in the product yields.After the preparation of the coumarin and quinoline derivatives, they will be analyzed by structural, photochemical and photophysical characterization, so that we can enable its use as sensitizing dyes on Grätzel photoeletrochemical devices. We intend to verify the effects of substituents, being them electron donating or withdrawing groups, in the yield and proportion of the products formed, in the reaction time and in the physical and chemical properties of the products formed.The coumarin and quinoline derivatives that present good results in the optical, thermal and fluorescence characterization will be submitted to evaluation in Grätzel devices, to assess their applicability in solar to electric energy conversion. (AU)

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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)
BARTOLOMEU, ALOISIO DE ANDRADE; DE MENEZES, MANOEL LIMA; DA SILVA-FILHO, LUIZ CARLOS. CHEMOSELECTIVE CONDENSATIONOF beta-NAPHTHOL, DIMETHYL MALONATE, ANDAROMATIC ALDEHYDES PROMOTED BY NIOBIUM PENTACHLORIDE. Synthetic Communications, v. 45, n. 9, p. 1114-1126, . (13/08697-0, 12/23821-7)
BARTOLOMEU, ALOISIO DE ANDRADE; DE MENEZES, MANOEL LIMA; DA SILVA FILHO, LUIZ CARLOS. Efficient one-pot synthesis of 14-aryl-14H-dibenzo [a,j]xanthene derivatives promoted by niobium pentachloride. CHEMICAL PAPERS, v. 68, n. 11, p. 1593-1600, . (13/08697-0, 12/23821-7)
DOS SANTOS, GIOVANNY CARVALHO; OLIVEIRA, ELIEZER FERNANDO; LAVARDA, FRANCISCO CARLOS; DA SILVA-FILHO, LUIZ CARLOS. Designing new quinoline-based organic photosensitizers for dye-sensitized solar cells (DSSC): a theoretical investigation. Journal of Molecular Modeling, v. 25, n. 3, . (12/24199-8, 14/20410-1, 16/18499-0, 13/08697-0, 12/21983-0, 16/01599-1, 15/00615-0)
DOS SANTOS, GIOVANNY CARVALHO; SERVILHA, ROBERTA OLIVEIRA; DE OLIVEIRA, ELIZER FERNANDO; LAVARDA, FRANCISCO CARLOS; XIMENES, VALDECIR FARIAS; DA SILVA-FILHO, LUIZ CARLOS. Theoretical-Experimental Photophysical Investigations of the Solvent Effect on the Properties of Green- and Blue-Light-Emitting Quinoline Derivatives. Journal of Fluorescence, v. 27, n. 5, p. 1709-1720, . (12/24199-8, 14/20410-1, 13/08697-0, 12/21983-0, 16/01599-1, 15/00615-0)
OSHIRO, PAULA BEATRIZ; DA SILVA GOMES LIMA, PAULA SOUZA; DE MENEZES, MANOEL LIMA; DA SILVA-FILHO, LUIZ CARLOS. Synthesis of 4H-chromenes promoted by NbCl5 through multicomponent reaction. Tetrahedron Letters, v. 56, n. 30, p. 4476-4479, . (13/08697-0)
MARTINS, JEFFERSON S.; BARTOLOMEU, ALOISIO A.; DOS SANTOS, WILLIAN HENRIQUE; DA SILVA FILHO, LUIZ CARLOS; DE OLIVEIRA, ELIEZER FERNANDO; LAVARDA, FRANCISCO CARLOS; CUIN, ALEXANDRE; LEGNANI, CRISTIANO; MACIEL, INDHIRA O.; FRAGNEAUD, BENJAMIN; et al. New Class of Organic Hole-Transporting Materials Based on Xanthene Derivatives for Organic Electronic Applications. Journal of Physical Chemistry C, v. 121, n. 24, p. 12999-13007, . (14/20410-1, 12/23821-7, 13/08697-0, 12/21983-0, 16/01599-1)

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