title: 1-[2-Hydroxy-3-octadecan-1'-oate]propyl-2'',2'',5'',5''-tetramethyl pyrolidine-N-oxyl-3''-carboxylate as a potential spin probe for membrane structure studies.
abstract: The synthesis of a new minimum steric perturbing proxyl nitroxide, which is a derivative of glycerol and contains a stearic acid moiety, has been carried out. Its localization in model membrane L-alpha-dipalmitoyl phosphatidyl choline (DPPC) was ascertained with the help of ESR, DSC, 1H and 31P NMR techniques. The nitroxide was used for detecting the changes in the phase transition temperature of the model membranes in the presence and absence of drugs. The permeation of the vasodilating drug epinephrine has also been studied using this spin label. The results prove the potential applicability of the new spin probe in the spin labeling of biomembranes.
authors.affiliation: Department of Chemistry, Indian Institute of Technology, Mumbai.
authors.forename: R
authors.initials: R
authors.lastname: Katoch
authors.forename: G K
authors.initials: GK
authors.lastname: Trivedi
authors.forename: R S
authors.initials: RS
authors.lastname: Phadke
mesh_terms: D015060:1,2-Dipalmitoylphosphatidylcholine / Q000737:chemistry; D002152:Calorimetry, Differential Scanning; D003497:Cyclic N-Oxides / Q000138:chemical synthesis* / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D009682:Magnetic Resonance Spectroscopy; D008563:Membrane Lipids / Q000737:chemistry*; D011759:Pyrrolidines / Q000138:chemical synthesis* / Q000737:chemistry*; D013113:Spin Labels / Q000138:chemical synthesis*; D013816:Thermodynamics
chemical_list: C405338:1-(2-hydroxy-3-octadecan-1'-oate)propyl-2'',2'',5'',5''-tetramethylpyrrolidine-N-oxyl-3''-carboxylate; D003497:Cyclic N-Oxides; D008563:Membrane Lipids; D011759:Pyrrolidines; D013113:Spin Labels; D015060:1,2-Dipalmitoylphosphatidylcholine