Organic materials are prized for their broad range of properties and cheap manufacturing protocols on large scales. Yet while organic polymers have a wealth of physical properties available to them, these material properties typically arise from a static structure. Consequently, there has been long-standing interest in developing new organic materials that adapt their properties in response to environmental cues or other external stimuli. One way of invoking such changes is by modifying the spin state of the parent material. The authors here present a viologen based polymer containing radical cation monomer units that is shown to reversibly switch between paramagnetic and diamagnetic states. The material shows response to external stimuli in the form of non-covalent interactions, such as binding events, and thermal response. These responses are accompanied by changes in optical and magnetic properties which can than be monitored by UV-Vis and EPR spectrometry.

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Radical viologen organic spin cross over materials

249th National Meeting (2015)

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<br /> Radical viologen organic spin cross over materials