posted on 2020-07-29, 20:43authored byMargarita Romero Ávila, Andrés Felipe León-Rojas, Pascal G. Lacroix, Isabelle Malfant, Norberto Farfán, Rana Mhanna, Rosa Santillan, Gabriel Ramos-Ortiz, Jean-Pierre Malval
We
report herein a molecular engineering strategy based on the
design of a multipolar ruthenium–nitrosyl (Ru–NO) complex
with a three-branched architecture. The three Ru–NO units are
introduced at the periphery of a highly π-delocalized truxene
core bearing three terpyridine ligands. The two-photon absorption
capabilities of the complex were investigated by the Z-scan technique.
The strong electronic coupling among the individual arms gives rise
to a very strong two-photon absorption response (δ800 nm ∼ 1600 GM), which corresponds to a 16-fold enhancement of
the capability of a single-arm reference, thereby promoting an efficient
light-driven NO release process in aqueous media.