A “Multi‐Heavy‐Atom” Approach toward Biphotonic Photosensitizers with Improved Singlet‐Oxygen Generation Properties

Two trispicolinate 1,4,7‐triazacyclonane (TACN)‐based ligands bearing three picolinate biphotonic antennae were synthetized and their Yb3+ and Gd3+ complexes isolated. One series differs from the other by the absence (L1)/presence (L2) of bromine atoms on the antenna backbone, offering respectively...

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