Concepedia

Abstract

Abstract NMR relaxation measurement of perfluorocarbons (PFCs), such as perfluorotributylamine (FTBA), is a convenient method for the determination of oxygen concentrations in tissues and tumors. Previous relaxation studies of FTBA used different 19 F NMR assignments causing some confusion. Fluorine‐detected 19 F, 13 C HMQC and HMBC and selectively 19 F‐decoupled 13 C NMR provided unequivocal 19 F and 13 C assignments for FTBA and perfluoropentanoic acid (FPA). Based on those assignments, 13 C spin–lattice relaxation time constants ( T 1 ) and effective correlation times for FTBA and FPA are reported and discussed. Copyright © 2003 John Wiley & Sons, Ltd.

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