Calix[4]arene nitroxide tetraradical and octaradical |
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| Authors: | Olankitwanit Arnon Kathirvelu Velavan Rajca Suchada Eaton Gareth R Eaton Sandra S Rajca Andrzej |
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| Institution: | Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588-0304, USA. |
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| Abstract: | 1,3-Alternate calix4]arene with para-phenylene spacers connecting nitroxide monoradicals and high-spin (S = 1) diradicals provides tetraradical and octaradical scaffolds that possess conformations with slow electron spin relaxation rates (1/T(1)). Such scaffolds may facilitate tuning of relaxation rates that are more favorable for MRI or DNP applications. |
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