PH.D. in Chemistry, Georgia State University, Atlanta, Georgia
Research interests involve the design, development, and spectral characterization of near-infrared fluorescent compounds for applications in various analytical techniques. The goal is to use the advantages of fluorescence detection in the near-infrared region to increase the detection sensitivity of conventional visible region analytical techniques. Areas of focus for the development of near-infrared fluorescent molecules include their use as: probes in chemical and biological sensors; labels in the imaging analysis of tissues, cells, and cell surfaces utilizing near-infrared fluorescence microscopy; acceptor molecules for use in fluorescence resonance energy transfer (FRET) applications; and as fluorophores in metal enhanced fluorescence (MEF) applications.
Orsa, D.K., Haynes. G.K., Pramanik, S.J., Iwunze, M.O., Greco, G.E., Ho, D.M., Krause, J.A., Hill, D.A., Williams, R.J., and Mandal, S.K. One-Pot Synthesis and the Fluorescence and Cytotoxicity Studies of Chlorotricarbonyl(α-diimine)Rhenium(I), fac-(CO)3(α-diimine )ReCl, (June, 2008) 11, 1054-1056. Inorganic Chemistry Communications
Hart, K., Fleming, N., Kennedy, A., Williams, R., and Winstead, A., Microwave Synthesis of Near-Infrared Heptamethine Cyanine Dye (March, 2008) International Microwave Power Institute
Baker, M., Ntam, C., Reese, C.T., Martin, T.V., Carrington, S., Leotaub, J., Cox, L.O., Williams, R.J., and Hill, D.A. Intracellular Uptake of Near-Infrared Cyanine Dyes by Isolated Leukocytes. May (2007), 53(3), 27-33. Cell Mol. Biol.
Reese, C.T., Ntam, C., Martin, T.V., Carrington, S., Leotaub, J., Cox, L.O., Williams, R.J., and Hill, D.A. Internalization of Near-Infrared Fluorescent Dyes within Isolated Macrophage Populations. March (2006), 3(1), 31-37. Intern. J. Environ. Res. Public Health
Winstead, A.J., Williams, R.J., Fleming, N., and Kennedy, A. Microwave Synthesis of Near Infrared Heptamethine Dyes 39th Annual Microwave Symposium Proceedings, p. 80, 2005.
Hijji, Y., Kennedy, A., Iwunze, M., and Williams, R.J. "Synthesis and Characterization of Fluoride Ion Fluorescence Sensor" Medical and Biomedical Sensors II (Cullum, B., ed.), Vol. 5588:212 - 223, 2004.
Williams, R.J., Lipowska, M., Narayanan, N., Casay, G.A., Peralta, J.M., Strekowski, L., Tsang, V.C.W., and Patonay, G. "Near-infrared Heptamethine Cyanine Dyes: A New Tracer for Solid Phase Immunoassays." Applied Spectroscopy (1997), 51, 836-843.
Williams, R.J., Lipowska, M., Narayanan, N., Casay, G.A., Peralta, J.M., Strekowski, L., Tsang, V.C.W., and Patonay, G. "An Instrument Designed to Detect Near-Infrared Fluorescence for a Solid Phase Immunoassay." Analytical Chemistry (1994), 66, 3102-3107.
Williams, R.J., Lipowska, M, Strekowski, L.,and Patonay, G. "A Comparison of Near-IR Covalent and Noncovalent Labeling with Near-Infrared Dyes for the HPLC Determination of Human Serum Albumin." Analytical Chemistry (1993), 65, 601-605.