MLCT excited-state energy. This high triplet energy was used in a proof-of-principle upconversion process and triplet-triplet energy transfer photocatalysis. Our findings demonstrate how diisocyanide chelate ligands can be used to tune the photophysical and photochemical properties of photoactive copper(I) complexes with four-coordinate coordination environments.
Eggenweiler et al. (Wed,) studied this question.