Medicine and Health Sciences Commons^™

Lithium Phthalocyanine: A Probe For Electron Paramagnetic Resonance Oximetry In Viable Biological Systems., K. J. Liu, P. Gast, M. Moussavi, S. W. Norby, N Vahidi, T Walczak

Dartmouth Scholarship

Lithium phthalocyanine (LiPc) is a prototype of another generation of synthetic, metallic-organic, paramagnetic crystallites that appear very useful for in vitro and in vivo electron paramagnetic resonance oximetry. The peak-to-peak line width of the electron paramagnetic resonance spectrum of LiPc is a linear function of the partial pressure of oxygen (pO2); this linear relation is independent of the medium surrounding the LiPc. It has an extremely exchange-narrowed spectrum (peak-to-peak line width = 14 mG in the absence of O2). Physicochemically LiPc is very stable; its response to pO2 does not change with conditions and environments (e.g., pH, temperature, redox conditions) …