Aza-DIPY and aza-BODIPY chromophores as a tunable platform for diradicaloid materials Viktor Nemykin, Morris Oyelow, Christopher J. Ziegler, and David A. Blank University of Tennessee, Knoxville, USA The diradicaloid materials are useful in various potential applications ranging from quantum computing to photocatalysis. We have developed a synthetic procedure that leads to the preparation of bis(2,6-tert-butylphenol) substituted aza-dipyrromethenes (aza-DIPYs) and boron aza-dipyrromethenes (aza-BODIPYs). Oxidation of these platforms leads to the formation of the respective quinoidal structures that have a significant diradicaloid character. New materials were fully characterized by spectroscopic (UV_Vis, NMR, EPR, and fluorescence), electro- and spectroelectrochemical methods, X-ray crystallography, as well as DFT and TDDFT calculation.
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