Department of Chemistry

Faculty Research Programs

Energy transfer in lanthanide/mixed d10 metal dicyanides
Professors Tracy and Ford; Professors Mullin (UNE) and Patterson (UM)

Many lanthanides exhibit strong fluorescence in the visible spectrum, with narrow emission bands characteristic of atomic energy level transitions. Lanthanide mixed-metal dicyanides, prepared by precipitation from aqueous solutions of trivalent lanthanide ions and varying amounts of aqueous gold and silver dicyanides, display both sharp atomic emissions and a high energy, broader emission attributed to the metal dicyanide. Furthermore, analysis of the excitation spectra of these compounds reveals striking evidence of a tunable energy transfer from the metal dicyanides to the lanthanide ion. The efficiency of this transfer process can be changed by varying the ratio of gold to silver.

  • Haiyan Lu, James Ford, Henry J. Tracy, Alora B. Carrier, Aaron Keller, Jerome L. Mullin, Michelle J. Poissan, Samuel Sawan and Howard H. Patterson, "Tunable Energy Transfer from d10 Metal-Metal Bonded Dicyanide(I) Donor Ions to Terbium(III) Acceptor Ions in Luminescent Tb[AgxAu1-x(CN2)]3 (x=0-1)", Chem. Phys. Lett., 2007443, 55-60.
  • Ford, J., Tracy, H., Carrier, A., Mullin, J., "Energy transfer in dry grind mixtures of terbium-mixed metal dicyanides", presentation at 235th ACS National Meeting, April 2008 (presenter).
  • Libby, J., Toye, S., Walls, H., Ford, J., "Chemistry Laboratory Research Curriculum: Synthesis and Photophysical Characterization of Lanthanide-mixed d10 metal dicyanide compounds", at the Seventh Annual USM Thinking Matters Symposium, Portland, ME., April 2008. [poster]
  • Henry J. Tracy, James Ford, Jerome L. Mullin, Alora Johnson and Aaron Keller, "Resonance energy transfer and tunable photoluminescence of terbium(III) heterobimetallic dicyanoaurate(I)-dicyanoargentate(I) powders", at the 232nd ACS National Meeting, San Francisco, CA., Sept 2006.