个人简介

B.S. University of New Mexico, 1964 Ph.D. University of New Mexico, 1970 National Science Foundation Postdoctoral Fellow, University of Southern California, 1970-71

研究领域

Photochemistry and photophysics of transition metal complexes

Photochemistry and Photophysics of Transition Metal Complexes Professor Demas is not currently accepting graduate students. Molecules excited by light lose energy by emission of light, transfer of energy or an electron to other molecules, photochemistry, and non-destructive radiationless processes. Solar energy conversion, chemical analysis, and light intensity measurements require information from the study of these processes. The processes can be highly sensitive to environmental factors such as solvent and interactions with organized media such as micelles, cyclodextrins, membranes, proteins, and DNAs. In addition, luminescence properties are very sensitive to the environment in polymer-supported sensors. We are elucidating the nature of these processes, correlating properties with molecular structure and environment, and developing new chemical, instrumental, and mathematical tools for studying these processes.

近期论文

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Aromatic difluoroboron β-diketonate complexes: effects of π-conjugation and media on optical properties. Xu S, Evans RE, Liu T, Zhang G, Demas JN, Trindle CO, Fraser CL. Inorg Chem. 52:3597-610 (2013). Viscosity and temperature effects on the rate of oxygen quenching of tris-(2,2′-bipyridine)ruthenium(II). Reynolds EW, Demas JN, DeGraff BA. J Fluoresc. 23:237-41 (2013). Environmental sensitivity of Ru(II) complexes: the role of the accessory ligands. Dixon EN, Snow MZ, Bon JL, Whitehurst AM, DeGraff BA, Trindle C, Demas JN. Inorg Chem. 51:3355-65 (2012). Photophysical and analyte sensing properties of cyclometalated Ir(III) complexes. Leavens BB, Trindle CO, Sabat M, Altun Z, Demas JN, DeGraff BA. J Fluoresc. 22:163-74 (2012). Laser phosphoroscope and applications to room-temperature phosphorescence. Payne SJ, Zhang G, Demas JN, Fraser CL, Degraff BA. Appl Spectrosc. 65:1321-4 (2011).