Chinese Optics Letters, 2009, 7 (6): 06521, Published Online: Jun. 8, 2009
Electrochemical, thermal, and photophysical properties of novel two-photon absorption chromophores
发光材料 非线性光学材料 探测器 双光子吸收 190.4400 Nonlinear optics, materials 160.0160 Materials 160.2540 Fluorescent and luminescent materials 160.4330 Nonlinear optical materials 160.4890 Organic materials
Abstract
Electrochemical, thermal, and photophysical properties of novel two- (BPODPA), four- (BBPOPA), and six-branch (TBPOA) triphenylamine chromophores are studied. The decomposition temperature of chromophores reaches 373-412 C. The electrochemical properties is explored by cyclic voltammetry. The ionization potential of chromophores is in the range of 5.14-5.18 eV. Excitation at 400 nm reveals emission peaks at 483-487 nm and the fluorescence quantum yields are 0.73-0.75 in CH2Cl2 Two-photon absorption (TPA) properties of chromophores are measured by nonlinear transmission method. The maximum TPA cross-section values are measured at 758 nm to be 20369 GM (1 GM=10^{-50} cm4s/photon) for TBPOA, 7024 GM for BBPOPA, and 1227 GM for BPODPA, respectively. When pumped with 800-nm laser irradiation, chromophores show strong two-photon excited blue-green fluorescence at 502-518 nm. These results provide a basis for understanding the electronic and optical properties of the conjugated multi-branch chromophore in terms of the underlying molecular and electronic structures.
Ying Qian, Qinqin Zhang, Kang Meng, Wei Huang, Changgui Lü, Yiping Cui. Electrochemical, thermal, and photophysical properties of novel two-photon absorption chromophores[J]. Chinese Optics Letters, 2009, 7(6): 06521.