title: Facile Synthesis and Photophysical Characterization of New Quinoline Dyes.
abstract: This paper describes the synthesis of new quinoline derivatives, molecules that has been long interest in the organic and medicinal chemistry. Through the Multicomponent Reaction (MCR), an important tool in modern synthetic methodology, that generate products with good structural complexity, in addition to economy of atoms and selectivity, we provide easy access to the preparation of quinoline derivatives. The reactions were promoted by niobium pentachloride, as a Lewis acid. Subsequently, the synthesis of new aminoquinoline derivatives with good yields was performed using Pd/C and hydrazine. The photophysical investigations of quinoline derivatives show the substituent effect on the optical properties characterization was done by absorption and photoluminescence measurements with quantum yields of up to 83 %, the presence of the amino group at position 6 at the quinoline backbone was crucial for obtaining these increased quantum yields. Results show that these molecules may have potential use for a variety of applications and mainly attracts attention because of its wide potential of applicability in optoelectronic devices.
authors: Laboratory of Organic Synthesis and Processes (LOSP), Department of Chemistry, Faculty of Sciences, São Paulo State University (UNESP), 17033-360, Bauru, São Paulo, Brazil.
authors: Giovanny Carvalho Dos
authors: GC
authors: Santos
authors: Laboratory of Organic Synthesis and Processes (LOSP), Department of Chemistry, Faculty of Sciences, São Paulo State University (UNESP), 17033-360, Bauru, São Paulo, Brazil.
authors: Aloisio
authors: A
authors: de Andrade Bartolomeu
authors: Laboratory of Organic Synthesis and Processes (LOSP), Department of Chemistry, Faculty of Sciences, São Paulo State University (UNESP), 17033-360, Bauru, São Paulo, Brazil.
authors: Valdecir Farias
authors: VF
authors: Ximenes
authors: Laboratory of Organic Synthesis and Processes (LOSP), Department of Chemistry, Faculty of Sciences, São Paulo State University (UNESP), 17033-360, Bauru, São Paulo, Brazil. lcsilva@fc.unesp.br.
authors: Luiz Carlos
authors: LC
authors: da Silva-Filho
keywords: Fluorescence quantum yields; Multicomponent reactions; Niobium pentachloride; Photoluminescence; Quinoline derivatives