title: Design, synthesis, characterization, luminescence and non-linear optical (NLO) properties of multinuclear platinum(II) alkynyl complexes.
abstract: A series of luminescent multinuclear platinum(II) alkynyl complexes containing triethynylbenzene or 1,4-bis(3,5-diethynylphenyl)buta-1,3-diyne as cores has been successfully synthesized and characterized. The electronic absorption, emission, nanosecond transient absorption and electrochemical properties of these complexes have been reported. These complexes show long-lived emissions in degassed benzene solution and in alcoholic glass at 77 K. Moreover, they are found to exhibit two-photon absorption (2PA) and two-photon induced luminescence (TPIL) properties, and their two-photon absorption cross-sections have been determined to be 6-191 GM upon excitation at 720 nm. Through a systematic comparison, it has been found that tetra- and hexanuclear platinum(II) complexes show better 2PA and TPIL properties than their di- and trinuclear counterparts.
authors.affiliation: Institute of Molecular Functional Materials, Department of Chemistry and HKU-CAS Joint Laboratory of New Materials, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China.
authors.forename: Carmen Ka Man
authors.initials: CK
authors.lastname: Chan
authors.forename: Chi-Hang
authors.initials: CH
authors.lastname: Tao
authors.forename: King-Fai
authors.initials: KF
authors.lastname: Li
authors.forename: Keith Man-Chung
authors.initials: KM
authors.lastname: Wong
authors.forename: Nianyong
authors.initials: N
authors.lastname: Zhu
authors.forename: Kok-Wai
authors.initials: KW
authors.lastname: Cheah
authors.forename: Vivian Wing-Wah
authors.initials: VW
authors.lastname: Yam