title: Blue emitting pentacoordinated Al(III) complexes based on 2-methylquinolin-8-olate and substituted phenolate ligands. The role of phenolate derivatives on emission and absorption properties.
abstract: This paper reports the synthesis, characterisation and photophysical investigation of the homologous series of blue-emitting pentacoordinated AlQ'(2)L complexes 1-6, where Q' is 2-methylquinolin-8-olate and L is a phenolate substituted in para to the oxygen donor atom. Both electron attracting and electron releasing substituents have been considered. Also binuclear complexes of formula Q'(2)Al-L'-AlQ'(2), where L' = OC(6)H(4)C(6)H(4)O, OC(6)H(4)(CH(2))(3)C(6)H(4)O and OC(6)H(4)C(CH(3))(2)C(6)H(4)C(CH(3))(2)C(6)H(4)O have been synthesised and characterised. These are interesting blue-emitting materials for OLED (organic light emitting diode) fabrication. A comparison between computational and experimental results allowed the description of the absorption and fluorescence processes. A study of the frontier orbitals involved in the electric conduction and fluorescence emission has been performed. Influences of the phenolate-based ligands on the compounds spectroscopy have been particularly taken into account.
authors.affiliation: Centro di Eccellenza CEMIF.CAL-LASCAMM, CR-INSTM Unità della Calabria, Dipartimento di Chimica, Università della Calabria, Arcavacata di Rende(CS), Italy.
authors.forename: Massimo
authors.initials: M
authors.lastname: La Deda
authors.forename: Iolinda
authors.initials: I
authors.lastname: Aiello
authors.forename: Annarita
authors.initials: A
authors.lastname: Grisolia
authors.forename: Mauro
authors.initials: M
authors.lastname: Ghedini
authors.forename: Mario
authors.initials: M
authors.lastname: Amati
authors.forename: Francesco
authors.initials: F
authors.lastname: Lelj
mesh_terms: D000042:Absorption; D017607:Aluminum Compounds / Q000138:chemical synthesis*; D008024:Ligands; D008163:Luminescent Measurements; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D010636:Phenols / Q000737:chemistry*; D011798:Quinaldines / Q000737:chemistry*; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D017607:Aluminum Compounds; D008024:Ligands; D009942:Organometallic Compounds; D010636:Phenols; D011798:Quinaldines; C037073:2-methylquinoline