These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Sulforhodamine B intercalated layered double hydroxide thin film with polarized photoluminescence.
    Author: Yan D, Lu J, Wei M, Evans DG, Duan X.
    Journal: J Phys Chem B; 2009 Feb 05; 113(5):1381-8. PubMed ID: 19143493.
    Abstract:
    Sulforhodamine B (SRB) and dodecylbenzenesulfonate (DBS) with different molar ratios cointercalated into the interlayer region of Mg-Al-layered double hydroxide (SRB-DBS/LDH) were prepared. The structure and chemical composition of the composites were characterized by X-ray diffraction, elemental analysis, thermogravimetry, and differential thermal analysis (TG-DTA). Fluorescence spectra demonstrate that the sample with 4.76% SRB molar percentage, with respect to the total organic material, exhibits the optimal luminous intensity. The fluorescence lifetime of SRB in SRB-DBS/LDH is enhanced significantly compared with that of pristine SRB in solution (4.14 vs 2.05 ns). SRB-DBS/LDH thin films on the quartz substrates were constructed by the solvent evaporation method. Steady-state polarization photoemission spectra show that the luminescence anisotropy of SRB-DBS/LDH thin films (r=0.10) was enhanced remarkably compared with that of a powder sample (r=0+/-0.01) at ambient temperature, whereas the anisotropy of both film and powder samples was largely improved at low temperature (77 K). Furthermore, the SRB-DBS/LDH thin films exhibit a luminescence anisotropy decay effect in the range of their fluorescence lifetime. These results demonstrate that the SRB-DBS/LDH thin films could be used as a good candidate for the immobilization of laser dyes and polarized luminescence materials.
    [Abstract] [Full Text] [Related] [New Search]