Synthesis and characterization of novel (oligo)thienyl-imidazo-phenanthrolines ...

• Author(s): Batista, Rosa M. F. ; Costa, Susana P. G. ; Belsley, M. ; Lodeiro, Carlos ; Raposo, M. Manuela M.
• Date: 2008
• Persistent ID: http://hdl.handle.net/1822/8092
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): π-Conjugated systems; Thiophenes; Formyl-(oligo)thiophenes; Imidazole; Phenanthroline; Solvatochromic probes; Hyper-Rayleigh scattering (HRS); Thermal stability; Nonlinear optics (NLO); Heterocyclic ligands
• Document Type: Article
• Language: English

Description

A series of new heterocyclic chromophores 3-6 were synthesised in moderate to excellent yields by condensation of 5,6-phenantroline-dione with formyl-thiophene derivatives 1-2 in the presence of ammonium acetate in glacial acetic acid. These chromophores possess a (oligo)thienyl- π-conjugated system attached to an imidazophenanthroline moiety. These derivatives were evaluated concerning their solvatochromic properties, thermal stabilities and molecular optical nonlinearities.