CHALCOGENOPYRYLIUM DYES, COMPOSITIONS COMPRISING SAME, COMPOSITE NANOPARTICLES COMPRISING SAME, AND METHODS OF MAKING AND USING THE SAME

摘要

The present disclosure provides chalcogenopyrylium compounds, composite nanostructures comprising the chalcogenopyrylium compounds, and methods of using the compounds and/or composite nanostructures. For example, composite nanostructures comprising the chalcogenopyrylium compounds are used in imaging applications. The present disclosure provides chalcogenopyrylium compounds having the following structure where each E is, at each occurrence in the compound, independently charged or neutral and is independently selected from S, Se, 0, or Te, wherein at least one E is S or Se; each R1 is, at each occurrence in the compound, independently selected from the group consisting of -H, Ci-s alkyl group, halo group, -CN, aryl group, and heteroaryl group and adjacent R1 groups can combine to form C5ss aryl groups, each R2 is, at each occurrence in the compound.