title: Tuning solid state luminescent properties in a hydrogen bonding-directed supramolecular assembly of bis-cyclometalated iridium(III) ethylenediamine complexes.
abstract: Synthesis, crystal structural determination and photophysical properties of a series of heteroleptic cationic cyclometalated iridium(III) derivatives of general formula [(ppy)(2)Ir(en)]X (X = ClO(4)(-) (1), PF(6)(-) (2), Cl(-) (3), BPh(4)(-) (4)), are described. The assembly of the common molecular building block allows to get highly luminescent crystalline materials or to assemble poorly luminescent supramolecular channelled architectures, for which the additional contribution of oxygen quenching effects has been observed. Moreover, the high reproducibility of the preparations of the crystalline materials in their specific crystalline phases, makes the control of the supramolecular organization of photo-active iridium(III) complexes within the crystalline structures a useful synthetic procedure for the construction of highly luminescent materials.
authors.affiliation: Centro di Eccellenza CEMIF.CAL, LASCAMM - CR INSTM, Unità INSTM della Calabria and LiCryl, CNR-INFM - Università della Calabria, I-87036 Arcavacata di Rende (CS), Italy. atalarico@unical.it
authors.forename: Anna Maria
authors.initials: AM
authors.lastname: Talarico
authors.forename: Elisabeta Ildyko
authors.initials: EI
authors.lastname: Szerb
authors.forename: Teresa F
authors.initials: TF
authors.lastname: Mastropietro
authors.forename: Iolinda
authors.initials: I
authors.lastname: Aiello
authors.forename: Alessandra
authors.initials: A
authors.lastname: Crispini
authors.forename: Mauro
authors.initials: M
authors.lastname: Ghedini
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D003460:Crystallization; D005029:Ethylenediamines / Q000737:chemistry*; D006860:Hydrogen Bonding; D007495:Iridium / Q000737:chemistry*; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D010100:Oxygen / Q000737:chemistry; D013055:Spectrophotometry, Infrared
chemical_list: D056831:Coordination Complexes; D005029:Ethylenediamines; D007495:Iridium; C031234:ethylenediamine; D010100:Oxygen