Titanium
From NMR Wiki
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Ti<sup>3+</sup> has electronic configuration 3d<sup>1</sup>, electron spin 1/2. | Ti<sup>3+</sup> has electronic configuration 3d<sup>1</sup>, electron spin 1/2. | ||
- | A spectrum assigned to Ti/histidine/EDTA complex<cite>las2k</cite> was observed in the context of a study on transient hydroxy-histidine radical formed by reaction of histidine with hydroxyl radicals generated in a Fenton system. g<sub>iso</sub> = 1.9632, line width = 0.5 mT, concentration = 14 mM in water, power = 1 mW, modulation = 0.05 mT, sweep time = 41 s, time constant = 41 ms. | + | A spectrum assigned to Ti/histidine/EDTA complex<cite>las2k</cite> was observed in the context of a study on transient hydroxy-histidine radical formed by reaction of histidine with hydroxyl radicals generated in a Fenton system. g<sub>iso</sub> = 1.9632 (1.9925,1.9573 |
+ | 1.9450, measured separately at 77K) , line width = 0.5 mT, concentration = 14 mM in water, T=power = 1 mW, modulation = 0.05 mT, sweep time = 41 s, time constant = 41 ms. Other species with assigned EPR parameters in this paper are: Ti(III)/EDTA (g=1.9539 stable at pH>7), Ti(IV)-superoxyl (g=2.0117) | ||
Tisaminopyridinato Ti<sup>3+</sup> - g<sub>0</sub> = 1.936±0.003, line width 3 mT, frequency 9.5 GHz, T=295K, concentration = 66 mM in hexane<cite>span98</cite>. At 100 K line is about twice broader. Hyperfine splitting on <sup>47,49</sup>Ti was not observed, due to broad line, measurement parameters not listed. | Tisaminopyridinato Ti<sup>3+</sup> - g<sub>0</sub> = 1.936±0.003, line width 3 mT, frequency 9.5 GHz, T=295K, concentration = 66 mM in hexane<cite>span98</cite>. At 100 K line is about twice broader. Hyperfine splitting on <sup>47,49</sup>Ti was not observed, due to broad line, measurement parameters not listed. |
Revision as of 22:06, 8 May 2009
T3+ EPR
Ti3+ has electronic configuration 3d1, electron spin 1/2.
A spectrum assigned to Ti/histidine/EDTA complex[1] was observed in the context of a study on transient hydroxy-histidine radical formed by reaction of histidine with hydroxyl radicals generated in a Fenton system. giso = 1.9632 (1.9925,1.9573 1.9450, measured separately at 77K) , line width = 0.5 mT, concentration = 14 mM in water, T=power = 1 mW, modulation = 0.05 mT, sweep time = 41 s, time constant = 41 ms. Other species with assigned EPR parameters in this paper are: Ti(III)/EDTA (g=1.9539 stable at pH>7), Ti(IV)-superoxyl (g=2.0117)
Tisaminopyridinato Ti3+ - g0 = 1.936±0.003, line width 3 mT, frequency 9.5 GHz, T=295K, concentration = 66 mM in hexane[2]. At 100 K line is about twice broader. Hyperfine splitting on 47,49Ti was not observed, due to broad line, measurement parameters not listed.
References
- Lassmann, G and Eriksson, LA and Lendzian, F and Lubitz, W. Structure of a Transient Neutral Histidine Radical in Solution: EPR Continuous-Flow Studies in a Ti3+/EDTA- Fenton System and Density Functional Calculations. J Phys Chem A 104(40):9144--9152, 2000. BibTeX
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Spannenberg, A and Tillack, A and Arndt, P and Kirmse, R and Kempe, R. Homoleptic trisaminopyridinato MIII complexes (M = Ti, V and Cr), synthesis, structure and EPR investigations. Polyhedron 17(5-6):845--850, 1998. BibTeX
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Davies, JJ. EPR and ENDOR of titanium-doped fluoride. Journal of Physics C: Solid State Physics 7:599--609, 1974. BibTeX