Synthesis, Mesomorphism, and Luminescent Properties of Calamitic 2-Phenylpyridines and Their Complexes with Platinum(II)

TY - JOUR

T1 - Synthesis, Mesomorphism, and Luminescent Properties of Calamitic 2-Phenylpyridines and Their Complexes with Platinum(II)

AU - Santoro, Amedeo

AU - Whitwood, Adrian C.

AU - Williams, J. A. Gareth

AU - Kozhevnikov, Valery N.

AU - Bruce, Duncan W.

PY - 2009/8/25

Y1 - 2009/8/25

N2 - The liquid crystal and luminescent properties of two related series of rod-like, ortho-platinated complexes bearing a beta-diketonate co-ligand are reported. The parent ligands exhibit a rich, smectic polymorphism, but when modified with a fused cyclopentene ring, nematic phases dominate. Reaction of the ligands with tetrachloroplatinate(II) leads to poorly soluble, dimeric complexes that can be cleaved using dimethylsulfoxide; the resulting monomeric complexes are then readily converted to the beta-diketonate complexes, All of the complexes are mesomorphic, and the beta-diketonate complexes have excited state lifetimes of 27 mu s With emission quantum efficiencies exceeding 0.5, the highest yet reported for materials of this type.

AB - The liquid crystal and luminescent properties of two related series of rod-like, ortho-platinated complexes bearing a beta-diketonate co-ligand are reported. The parent ligands exhibit a rich, smectic polymorphism, but when modified with a fused cyclopentene ring, nematic phases dominate. Reaction of the ligands with tetrachloroplatinate(II) leads to poorly soluble, dimeric complexes that can be cleaved using dimethylsulfoxide; the resulting monomeric complexes are then readily converted to the beta-diketonate complexes, All of the complexes are mesomorphic, and the beta-diketonate complexes have excited state lifetimes of 27 mu s With emission quantum efficiencies exceeding 0.5, the highest yet reported for materials of this type.

KW - LIGHT-EMITTING-DIODES

KW - CONTAINING LIQUID-CRYSTALS

KW - COORDINATION-COMPLEXES

KW - COLUMNAR MESOPHASES

KW - EFFICIENT ROUTE

KW - PHOSPHORESCENT

KW - EMISSION

KW - METALLOMESOGENS

KW - PHOTOLUMINESCENT

KW - 2,2'-BIPYRIDINE

UR - http://www.scopus.com/inward/record.url?scp=69249225648&partnerID=8YFLogxK

U2 - 10.1021/cm9012156

DO - 10.1021/cm9012156

M3 - Article

SN - 0897-4756

VL - 21

SP - 3871

EP - 3882

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 16

ER -