A series of bisbenzoxaphospholes and a trisbenzoxaphosphole have been prepared and characterized. These extended π-conjugated heterocyclic phosphaalkenes display significant fluorescence in solution having quantum yields between 0.12 and 0.85. The solid state structure of a bisbenzoxaphosphole reveals evidence for extended conjugation, as do DFT calculations.
S. Wu, A. L. Rheingold and J. D. Protasiewicz, Chem. Commun., 2014, 50, 11036 DOI: 10.1039/C4CC05259E
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