Synthesis and Structural Characterization of a Novel Symmetrical 2,10-Bis-Styryl-1-Benzopyrylium Dye

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Gomes, V (Autor) Outra; Nuno Mateus (Autor) FCUP; Victor de Freitas (Autor) FCUP; Luis Cruz (Autor) FCUP

Revista

Título: Synlett

Vol. 29

Páginas: 1390-1394

ISSN: 0936-5214

Editora: Thieme

Indexação

ISI Web of Knowledge - 12 Citações

Scopus - 12 Citações

Outras Informações

ID Authenticus: P-00R-A9T

DOI: 10.1055/s-0036-1591978

Abstract (EN): A novel symmetrical 2,10-bis-styryl-1-benzopyrylium dye was synthesized through two steps: In the first reaction an aldol condensation between 2,4,6-trihydroxybenzaldehyde and 3,4-dihydroxymethylstyrylketone gave 5,7,3,4-tetrahydroxy-2-styryl-1-benzopyrylium; and in the second step this latter reacted with the same ketone by a cycloaddition reaction yielding the symmetrical 2,10-bis(3,4-dihydroxystyryl)-pyrano-7-hydroxy-1-benzopyrylium. The dye was fully characterized by LC-DAD/ESI-MS and NMR 1D and 2D techniques, and a formation pathway was proposed. The novel dye obtained revealed extended -conjugation ((max) 556 nm) and catechol groups in its composition, which is very important for applications as a photosensitizer for dye-sensitive solar cells (DSSCs).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5