QUANTUM CHEMISTRY

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This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. High resolution tissue and tumor images of molecular oxygenation are relevant to understanding a variety of important, clinical problems including stroke, heart attack, peripheral vascular disease, and cancer. Such images can provide crucial guides to the delivery and monitoring of appropriate therapy. Imaging requires design, synthesis, and characterization of paramagnetic probes. We need to compute hyperfine couplings of the paramagnetic probes we study in order to improve the design of new probes. "One of the most challenging tasks in computational chemistry is the accurate calculation of the isotropic hyperfine components" Mattar and Stephens (2000). To use large basis sets, and to include solvent interactions with the radicals, requires computational capabilities that we do not have locally. This work is supported in part by NIH grant P41 EB002034, Howard Halpern, University of Chicago, PI, Gareth Eaton, University of Denver, Co-PI.