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Relaxation Time Papers

Review Articles

Electron Spin Lattice Relaxation Processes for Molecular S=1/2 Systems in Glassy Matrices at Temperatures between 10 and 130 K, Y. Zhou, R. Mitri, G. R. Eaton, and S. S. Eaton, Current Topics in Biophysics 23, 65-70 (1999).

Electron Spin Lattice Relaxation Rates for S = ½ Molecular Species in Glassy Matrices or Magnetically-dilute Solids at Temperatures between 10 and 300 K, Y. Zhou, B. E. Bowler, G. R. Eaton, and S. S. Eaton, J. Magn. Reson. 139, 165-174 (1999).

Relaxation Times of Organic Radicals and Transition Metal Ions, S. S. Eaton and G. R. Eaton, in Distance Measurements in Biological Systems by EPR, G. R. Eaton, S. S. Eaton, and L. J. Berliner, eds., Biol. Magn. Reson. 19, 29-154 (2000).

Frequency Dependence of Electron Spin Relaxation Times, G. R. Eaton and S. S. Eaton, in Multifrequency Electron Paramagnetic Resonance: Theory and Applications, S. K. Misra, Ed., ch. 17, Wiley-VCH, 2011.

Instrumentation

Pulsed EPR Spectrometer, R. W. Quine, G. R. Eaton, and S. S. Eaton, Rev. Sci. Instrum. 58, 1709-1724 (1987).

A saturation recovery electron paramagnetic resonance spectrometer, R. W. Quine, S. S. Eaton, and G. R. Eaton, Rev. Sci. Instrum. 63, 4251-4262 (1992).

Pulsed Saturation Recovery 250 MHz Electron Paramagnetic Resonance Spectrometer, R. W. Quine, S. S. Eaton, and G. R. Eaton, Conc. Magn. Reson. B, (Magn. Reson. Engin.) 26B, 23-27 (2005).

Distance Measurements

Time-Domain Electron Paramagnetic Resonance as a Probe of Electron-Electron Spin-Spin Interaction in Spin-Labeled Iron Porphyrins, M. H. Rakowsky, K. M. More, A. V. Kulikov, G. R. Eaton, and S. S. Eaton, J. Amer. Chem. Soc. 117, 2049-2057 (1995).

Electron-Electron Spin-Spin Interaction in Spin-Labeled Low-Spin Methemoglobin, V. Budker, J.-L. Du, M. Seiter, G. R. Eaton, and S. S. Eaton, Biophys. J. 68, 2531-2542 (1995).

Enhancement of Electron Spin Relaxation Rates of Metalloporphyrins due to Interaction with a Faster Relaxing Metal Bound to an Appended Bipyridyl, J. M. Burchfield, J.-L. Du, K. M. More, S. S. Eaton, and G. R. Eaton, Inorg. Chim. Acta 263, 23-33 (1997).

Determination of High-Spin Iron(III)-Nitroxyl Distances in Spin-Labeled Porphyrins by Time-Domain EPR, M. H. Rakowsky, A. Zecevic, G. R. Eaton, and S. S. Eaton, J. Magn. Reson. 131, 97-110 (1998).

Interspin Distances Determined by Time Domain EPR of Spin-Labeled High-Spin Methemoglobin, M. Seiter, V. Budker, J.-L. Du, G. R. Eaton, and S. S. Eaton, Inorganica Chimica Acta 273, 354-366 (1998).

Interspin Distances in Spin-Labeled Metmyoglobin Variants Determined by Saturation Recovery EPR, Y. Zhou, B. E. Bowler, K. Lynch, S. S. Eaton, and G. R. Eaton, Biophys. J. 79, 1039-1052 (2000).

Electron-Electron Distances in Spin-Labeled Low-Spin Metmyoglobin Variants by Relaxation Enhancement, D. Ulyanov, B. E. Bowler, G. R. Eaton, and S. S. Eaton, Biophysical Journal 95, 5306-5316 (2008).

Relaxation Rates for Spirocyclohexyl Nitroxyl Radicals are Suitable for Interspin Distance Measurements at Temperatures up to about 125 K, V. Kathirvelu, C. Smith, C. Parks, Md. A. Mannan, Y. Miura, K. Takeshita, S. S. Eaton, and G. R. Eaton, Chem. Commun., 454-456 (2009).

A Spirocyclohexyl Nitroxide Amino Acid Spin Label for Pulsed EPR Distance Measurements, A. Rajca, V. Kathirvelu, S. K Roy, M. Pink, S. Rajca, S. Sarkar, S. S. Eaton, and G. R. Eaton, Chem. Eur. J. 16, 5778-5782 (2010).

Spin Lattice Relaxation for Organic Radicals

Electron Spin Relaxation Times of Irradiated Alanine, K. Nakagawa, S. S. Eaton, and G. R. Eaton, Appl. Radiat. Isotop. 44, 73-76 (1993).

Temperature, Orientation, and Solvent Dependence of Electron Spin Lattice Relaxation Rates for Nitroxyl Radicals in Glassy Solvents and Doped Solids, J.-L. Du, G. R. Eaton, and S. S. Eaton, J. Magn. Reson. A115, 213-221 (1995).

Magnetic Field and Frequency Dependence of Electron Spin Relaxation Times of the E' Center in Irradiated Vitreous Silica, B. T. Ghim, S. S. Eaton, G. R. Eaton, R. W. Quine, G. A. Rinard, and S. Pfenninger, J. Magn. Reson. A115, 230-225 (1995).

Frequency Dependence of Electron Spin Relaxation for Three S=1/2 Species Doped into Diamagnetic Solid Hosts, S. S. Eaton, J. Harbridge, G. A. Rinard, G. R. Eaton and R. T. Weber, Appl. Magn. Reson. 20, 151-157 (2001).

Electron Spin Relaxation of Triarylmethyl Radicals in Fluid Solution, L. Yong, J. Harbridge, R. W. Quine, G. A. Rinard, S. S. Eaton, G. R. Eaton, C. Mailer, E. Barth, and H. J. Halpern, J. Magn. Reson. 152, 156-161 (2001).

Electron Spin-Lattice Relaxation Processes in Irradiated Crystalline Organic Compounds, J. R. Harbridge, S. S. Eaton, and G. R. Eaton, J. Phys. Chem. A 107, 598-610 (2003).

Electron Spin Relaxation of Radicals in gamma-irradiated Malonic Acid and Methyl Malonic Acid, J. R. Harbridge, S. S. Eaton, and G. R. Eaton, Appl. Magn. Reson. 24, 261-276 (2003).

Frequency Dependence of Electron Spin Relaxation of Nitroxyl Radicals in Fluid Solution, R. Owenius, G. E. Terry, M. J. Williams, S. S. Eaton, and G. R. Eaton, J. Phys. Chem. B. 108, 9475-9481 (2004).

Frequency (250 MHz to 9.2 GHz) and Viscosity Dependence of Electron Spin Relaxation of Triarylmethyl Radicals at Room Temperature, R. Owenius, G. R. Eaton, and S. S. Eaton, J. Magn. Reson. 172, 168-175 (2005).

Multifrequency EPR of Four Triarylmethyl Radicals, A. J. Fielding, P. J. Carl, G. R. Eaton, and S. S. Eaton, Appl. Magn. Reson. 28, 231-238 (2005).

Electron Spin-Lattice Relaxation in Radicals Containing Two Methyl Groups, Generated by gamma-Irradiation of Polycrystalline Solids, J. R. Harbridge, S. S. Eaton, and G. R. Eaton, J. Magn. Reson. 159, 195-206 (2002).

Electron Spin Relaxation in x-Lithium Phthalocyanine, H. Sato, L. A. Dalton, D. Ha, R. W. Quine, S. S. Eaton, and G. R. Eaton, J. Phys. Chem. B 111, 7972-7977 (2007).

Electron Spin Relaxation of Radicals in Irradiated Tooth Enamel and Synthetic Hydroxyapatite, H. Sato, B. A. Filas, S. S. Eaton, and G. R. Eaton, Radiation Measurements, 42, 997-1004 (2007).

Impact of molecular size on electron spin relaxation rates of nitroxyl radicals in glassy solvents between 100 and 300 K, H. Sato, V. Kathirvelu, A. Fielding, J. P. Blinco, A. S. Micallef, S. E. Bottle, S. S. Eaton, and G. R. Eaton, Mol. Phys. 105, 2137-2151 (2007).

Electron spin-lattice relaxation of nitroxyl radicals in temperature ranges that span glassy solutions to low-viscosity liquids, H. Sato, S. E. Bottle, J. P. Blinco, A. S. Micallef, G. R. Eaton, and S. S. Eaton, J. Magn. Reson. 191, 66-77 (2008).

Impact of electron-electron spin interaction on electron spin relaxation of nitroxide diradicals and tetraradical in glassy solvents between 10 and 300 K, H. Sato, V. Kathirvelu, G. Spagnol, S. Rajca, S. S. Eaton, and G. R. Eaton, J. Phys. Chem. B 112, 2818-2828 (2008).

Electron Spin Relaxation Rates for Semiquinones between 25 and 295 K in Glass-Forming Solvents, V. Kathirvelu, H. Sato, S. S. Eaton and G. R. Eaton, J. Magn. Reson. 198, 111-120 (2009).

Impact of Chlorine Substitution on Spin Lattice Relaxation of Triarylmethyl and 1,4-Benzosemiquinone Radicals in Glass-forming Solvents between 25 and 295 K, V. Kathirvelu, G. R. Eaton, and S. S. Eaton, Appl. Magn. Reson. 37, 649-656 (2010).

Electron Spin Relaxation and Heterogeneity of the 1:1 α,γ-Bisdiphenylene-β-phenylallyl (BDPA) : Benzene Complex, D. G. Mitchell, R. W. Quine, M. Tseitlin, R. T. Weber, V. Meyer, A. Avery, S. S. Eaton, and G. R. Eaton, J. Phys. Chem. B 115, 7986-7990 (2011).

Relaxation Times and Line Widths of Isotopically-Substituted Nitroxides in Aqueous Solution at X-band, J. R. Biller, V. Meyer, H. Elajaili, G. M. Rosen, J. P.Y. Kao, S. S. Eaton, and G. R. Eaton, J. Magn. Reson. 212, 370-377 (2011).

Frequency Dependence of Electron Spin Relaxation Times in Aqueous Solution for a Nitronyl Nitroxide Radical and Per-deuterated-Tempone between 250 MHz and 34 GHz, J. R. Biller, V. M. Meyer, H. Elajaili, G. M. Rosen, S. S. Eaton, and G. R. Eaton, J. Magn. Reson. 225, 52 – 57 (2012).

Temperature Dependence of Electron Spin Relaxation of 2,2-diphenyl-1-picrylhydrazyl in Polystyrene, V. M. Meyer, S. S. Eaton, and G. R. Eaton, Appl. Magn. Reson., accepted for publication.

Organic Radical Contrast Agents for Magnetic Resonance Imaging, A. Rajca, Y. Wang, M. Boska, J. T. Paletta, A. Olankitwanit, M. A. Swanson, D. G. Mitchell, S. S. Eaton, G. R. Eaton, S. Rajca, J. Amer. Chem. Soc. 134, 15724 – 15727 (2012).

Temperature Dependence of Electron Spin Relaxation of 2,2-diphenyl-1-picrylhydrazyl in Polystyrene, V. M. Meyer, S. S. Eaton, and G. R. Eaton, Appl. Magn. Reson. 44, 509-517 (2013).

Electron Spin Lattice Relaxation Mechanisms of Rapidly-Tumbling Nitroxide Radicals, J. R. Biller, H. Elajaili, V. Meyer, G. M. Rosen, S. S. Eaton, and G. R. Eaton, J. Magn. Reson., 236, 47 – 56 (2013).

Frequency Dependence of Electron Spin-lattice Relaxation for Semiquinones in Alcohol Solutions, H. B. Elajaili, J. R. Biller, S. S. Eaton, and G. R. Eaton, J. Magn. Reson. 247, 81 – 87 (2014).

X-band electron spin relaxation times for four aromatic radicals in fluid solution and comparison with other organic radicals, V. Meyer, S. S. Eaton, and G. R. Eaton, Appl. Magn. Reson. 45, 993 – 1007 (2014).

Spin Lattice Relaxation for Transition Metal Complexes

Electron Spin Relaxation Rates for Nitridochromium(V) Tetratolylporphyrin and Nitridochromium(V) Octaethylporphyrin in Frozen Solution, R. Konda, J.-L. Du, S. S. Eaton, and G. R. Eaton, Appl. Magn. Reson. 7, 185-193 (1994).

Electron Spin Lattice Relaxation in Natural Abundance and Isotopically Enriched Oxo-chromium(V)bis(2-hydroxy-ethylbutyrate), J.-L. Du, G. R. Eaton, and S. S. Eaton, J. Magn. Reson. A115, 236-240 (1995).

Temperature and Orientation Dependence of Electron Spin Relaxation Rates for Bis(diethyldithiocarbamato)Copper(II), J.-L. Du, G. R. Eaton, and S. S. Eaton., J. Magn. Reson. A117, 67-72 (1995).

Temperature and Orientation Dependence of Electron Spin Relaxation in Molybdenum(V) Porphyrins, R. Husted, J.-L. Du, G. R. Eaton, and S. S. Eaton, Magn. Reson. Chem. 33, 66S-70S (1995).

Electron Spin Relaxation in Vanadyl, Copper(II), and Silver(II) Porphyrins in Glassy Solvents and Doped Solids, J.-L. Du, G. R. Eaton, and S. S. Eaton, J. Magn. Reson. A119, 240-246 (1996).

Electron Spin Relaxation Rates for High-spin Fe(III) in Iron Transferrin Carbonate and Iron Transferrin Oxalate, B. J. Gaffney, G. R. Eaton, and S. S. Eaton, J. Phys. Chem. B 102, 5536-5541 (1998).

Electron Spin Relaxation in Chromium Nitrosyl Complexes, L. M. Carruthers, C. L. Closken, K. Link, S. N. Mahapatro, M. Bikram, J.-L. Du, S. S. Eaton, and G. R. Eaton, Inorg. Chem. 38, 3529-3534 (1999).

Electron Spin-Lattice Relaxation Rates for High-Spin Fe(III) Complexes in Glassy Solvents or Magnetically-dilute Solids at Temperatures between 6 and 298 K, Y. Zhou, B. E. Bowler, G. R. Eaton, and S. S. Eaton, J. Magn. Reson. 144, 115-122 (2000).

Electron Spin Relaxation of Copper(II) Complexes in Glassy Solution between 10 and 120 K, A. J. Fielding, S. Fox, G. L. Millhauser, M. Chattopadhyay, P. M. H. Kroneck. G. Fritz, G. R. Eaton, and S. S. Eaton, J. Magn. Reson. 179, 92-104 (2006).

Electron Spin Lattice Relaxation of V(IV) Complexes in Glassy Solutions between 15 and 70 K, A. J. Fielding, D. B. Back, M. Engler, B. Baruah, D. C. Crans, G. R. Eaton, and S. S. Eaton, ACS Symposium Series 974, 364-375 (2007).

Spin Echo Dephasing

Electron Spin Relaxation Times of Chromium(V), K. Nakagawa, M. B. Candelaria, W. W. C. Chik, S. S. Eaton, and G. R. Eaton, J. Magn. Reson. 98, 81-91 (1992).

Orientation dependence of electron spin phase memory relaxation times in copper(II) and vanadyl complexes in frozen solution, J.-L. Du, K. M. More, S. S. Eaton, and G. R. Eaton, Israel J. Chem. 32, 351-355 (1992).

Effect of Molecular Motion on Electron Spin Phase Memory Times for Copper(II) in Doped Solids, J.-L. Du, G. R. Eaton, and S. S. Eaton, Appl. Magn. Reson. 6, 373-378 (1994).

Electron Spin Echo Decay as a Probe of Aminoxyl Environment in Spin-Labeled Mutants of Human Carbonic Anhydrase II, M. Lindgren, G. R. Eaton, S. S. Eaton, B.-H. Jonsson, P. Hammarström, M. Svensson, and U. Carlsson, Perkin Trans. 2, 2547-2554 (1997).

Dephasing of Electron Spin Echoes for Nitroxyl Radicals in Glassy Solvents by Non-methyl and Methyl Protons, A. Zecevic, G. R. Eaton, S. S. Eaton, and M. Lindgren, Mol. Phys. 95, 1255-1263 (1998).

Solvent and Temperature Dependence of Spin Echo Dephasing for Chromium(V) and Vanadyl Complexes in Glassy Solution, G. R. Eaton and S. S. Eaton, J. Magn. Reson. 136, 63-68 (1999).

Phase Memory Relaxation Times of Spin Labels in Human Carbonic Anhydrase II: Pulsed EPR to Determine Spin Label Location, M. Huber, M. Lindgren, P. Hammarström, L.-G. Mårtensson, U. Carlsson, G. R. Eaton, and S. S. Eaton, Biophys. Chem. 94, 245-256 (2001).

Comparison of Electron Spin Relaxation Times Measured by Carr-Purcell-Meiboom-Gill and Two-Pulse Spin Echo Sequences, J. R. Harbridge, S. S. Eaton and G. R. Eaton, J. Magn. Reson. 164, 44-53 (2003).

Electron Spin T2 of a Nitroxyl Radical at 250 MHz Measured by Rapid Scan EPR, M. Tseitlin, A. Dhami, R. W. Quine, G. A. Rinard, S. S. Eaton, and G. R. Eaton, Appl. Magn. Reson. 30, 651-656 (2006).