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Fabrication and properties of novel Langmuir-Blodgett films with multifunctional molecular precursors of lanthanide complexes with long chain para-L-oxybenzoate (L = 1-palmitoyl, 1-stearoyl)

BING XU1, BING YAN1,2,*

Affiliation

  1. Department of Chemistry, Tongji University, Shanghai 200092, P. R. China
  2. State Key Lab of Coordination Chemistry, Nanjing University, Nanjing 210093, P.R. China

Abstract

Several ultra thin luminescent Langmuir–Blodgett (LB) films have been prepared by using the subphase containing the rare earth ions (Eu3+, Dy3+). The effect of the rare earth ions on the monolayer of p-palmitoyloxybenzoate (16-OBA) and p-stearoyloxybenzoate (18-OBA) was investigated. IR spectra showed the rare earth ions were bound to the carboxylic acid head groups and the coordination took place between the polar head group and the rare earth ions. The layer structure of the LB films was demonstrated by low-angle X-ray diffraction. The AFM study revealed that the LB films were uniform and crack free, and the films mainly consisted of closely packed grains with an average size of 278 nm. The LB films can give off strong fluorescence, and the signal can be detected from a single layer. The characteristic luminescence behaviors of LB films have been discussed compared with those of the complexes..

Keywords

Chemical modification, Photoluminescence, Molecular fabrication, Thin films.

Submitted at: July 4, 2008
Accepted at: Feb. 24, 2009

Citation

BING XU, BING YAN, Fabrication and properties of novel Langmuir-Blodgett films with multifunctional molecular precursors of lanthanide complexes with long chain para-L-oxybenzoate (L = 1-palmitoyl, 1-stearoyl), Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 2, pp. 169-174 (2009)