Ligand Control of 59Co Nuclear Spin Relaxation Thermometry.

Magnetochemistry
Tyler M OzvatJoseph M Zadrozny

Abstract

Studying the correlation between temperature-driven molecular structure and nuclear spin dynamics is essential to understanding fundamental design principles for thermometric nuclear magnetic resonance spin-based probes. Herein, we study the impact of progressively encapsulating ligands on temperature-dependent 59Co T 1 (spin-lattice) and T 2 (spin-spin) relaxation times in a set of Co(III) complexes: K3[Co(CN)6] (1); [Co(NH3)6]Cl3 (2); [Co(en)3]Cl3 (3), en = ethylenediamine); [Co(tn)3]Cl3 (4), tn = trimethylenediamine); [Co(tame)2]Cl3 (5), tame = triaminomethylethane); and [Co(dinosar)]Cl3 (6), dinosar = dinitrosarcophagine). Measurements indicate that 59Co T 1 and T 2 increase with temperature for 1-6 between 10 and 60 °C, with the greatest ΔT 1/ΔT and ΔT 2/ΔT temperature sensitivities found for 4 and 3, 5.3(3)%T 1/°C and 6(1)%T 2/°C, respectively. Temperature-dependent T 2* (dephasing time) analyses were also made, revealing the highest ΔT 2*/ΔT sensitivities in structures of greatest encapsulation, as high as 4.64%T 2*/°C for 6. Calculations of the temperature-dependent quadrupolar coupling parameter, Δe 2 qQ/ΔT, enable insight into the origins of the relative ΔT 1/ΔT values. These results suggest tunable quadrupolar coupli...Continue Reading

References

Dec 1, 1996·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·C S ZuoM E Clouse
Jan 17, 1997·Science·N A Gershenfeld, I L Chuang
Oct 8, 1998·Journal of Magnetic Resonance·H QuastH H Limbach
Sep 9, 2005·International Journal of Hyperthermia : the Official Journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group·Gerard C van Rhoon, Peter Wust
Jan 26, 2008·Journal of Magnetic Resonance Imaging : JMRI·Viola Rieke, Kim Butts Pauly
May 8, 2013·Proceedings of the National Academy of Sciences of the United States of America·David M ToyliDavid D Awschalom
Apr 8, 2014·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Shuanglong LiuPeter S Conti
Jun 7, 2014·Science·Stefan ThieleWolfgang Wernsdorfer
Sep 1, 2011·IEEE Pulse·C Brace
Aug 16, 2018·Royal Society Open Science·R J FosterA Radjenovic
Aug 2, 2019·Chemical Science·Tyler M OzvatJoseph M Zadrozny
Jun 2, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Tyler M OzvatJoseph M Zadrozny

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