Daofu Liu, Fengwu Wang, Ke-Neng Wu
Feb 1, 2010
Citations
0
Influential Citations
1
Citations
Journal
Physics and Chemistry of Liquids
Abstract
A novel bent-shaped derivative, 2-thiomethyl-4,6-bis(4-N,N-methylaminostyryl) pyrimidine (TMAP) has been successfully synthesised and fully characterised by elemental analysis, IR, 1H NMR and MS. The molecule possesses D–π–A–π–D structures. Dimethylamino is used as the donor (D), and the pyrimidine ring is used as the acceptor (A). One- and two-photon absorption and fluorescence in various solvents were experimentally investigated. The chromophore shows intense single-photon excited fluorescence (SPEF) and two-photon excited fluorescence (TPEF) in a wide spectral range, with the spectral peak position of the SPEF being basically the same as that of the TPEF. The chromophore combines well with peak TPA cross-sections (up to 352.0 GM) and broad TPA bands throughout the whole 700–900 nm range and high-fluorescence quantum yields could thus be obtained. The theoretical and experimental studies indicate the charge transfer from donor to acceptor.