A Noncovalently Reversible Paramagnetic Switch in Water

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2013-01-01
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Buck, Alexander
Paletta, Joseph
Khindurangala, Shalika
Beck, Christie
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Winter, Arthur
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Chemistry

The Department of Chemistry seeks to provide students with a foundation in the fundamentals and application of chemical theories and processes of the lab. Thus prepared they me pursue careers as teachers, industry supervisors, or research chemists in a variety of domains (governmental, academic, etc).

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The Department of Chemistry was founded in 1880.

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Abstract

We report an organo-paramagnetic switch consisting of a linked bis(viologen) dication diradical that can be cycled reversibly between diamagnetic and paramagnetic states via noncovalent guest–host chemistry with cucurbit[7]uril (CB[7]) in room-temperature water. Computations suggest that the nature of the interaction between the viologen cation radical units is that of a pi dimer (pimer). Molecules with switchable magnetic properties have possible applications in spintronics, data storage devices, chemical sensors, building blocks for materials with switchable bulk magnetic properties, as well as magnetic resonance probes for biological applications.

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Reprinted (adapted) with permission from J. Am. Chem. Soc., 2013, 135 (29), pp 10594–10597. Copyright 2013 American Chemical Society.

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Tue Jan 01 00:00:00 UTC 2013
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