Department of Chemistry
Dual-emissive Langmuir–Blodgett films of a 9,9-bis(4-ethynylphenyl)fluorene derivative of gold(I) and some europium-substituted polyoxometalates: preparation, characterization and photoelectric properties
A new family of organometallic/inorganic composite Langmuir-Blodgett (LB) films consisting of the rigid-rod dinuclear gold(I) complex coordinated with 9,9-bis(4-ethynylphenyl)fluorene (denoted as Au-DPF) as the π-conjugated organometallic molecule coupled with some europium-substituted polyoxometalates (POM; POM = Na 9EuW 10O 36, K 13[Eu(SiW 11O 39) 2] and K 5[Eu(SiW 11O 39)(H 2O) 2]) as the inorganic component were prepared and characterized by π-A isotherms, UV-vis absorption and photoluminescence spectra, atomic force microscopy imaging, scanning tunneling microscopy, and surface photo-voltage spectroscopy. Luminescence spectra of the prepared hybrid LB films show that the near-white emission spectra can be obtained due to the dual-emissive nature of the mixed Au-DPF/POM blends, and POM can facilitate broad aggregate emission bands. These Au-diyne-based LB films displayed interesting electric conductivity behavior. Among them, Au-DPF/K 13[Eu(SiW 11O 39) 2] 13-layer film showed a good electrical response, with the tunneling current up to ±100 nA when the voltage was monitored between -1. 3 and 1. 8 V. The photovoltage response of Au-DPF/EuW 22 amounts to 1. 5 μV. © 2011 Springer Science+Business Media, LLC.
Gold acetylide, LB Film, Photoelectric property, Polyoxometalate, Preparation
Source Publication Title
Journal of Inorganic and Organometallic Polymers and Materials
Link to Publisher's Edition
Fu, Qiao-Min, Hui Fu, Lei Hu, Li Liu, Shi-Zhong Liu, Zu-Liang Du, and Wai-Yeung Wong. "Dual-emissive Langmuir–Blodgett films of a 9,9-bis(4-ethynylphenyl)fluorene derivative of gold(I) and some europium-substituted polyoxometalates: preparation, characterization and photoelectric properties." Journal of Inorganic and Organometallic Polymers and Materials 22.1 (2012): 97-104.