Two-photon chiro-optical properties of gold Au25 nanoclusters†
Abstract
Atomically-precise chiral gold nanoclusters hold promise for an accurate manipulation of chiro-optical properties, both in linear and nonlinear optics regimes. Here, we present the determination of two-photon linear-circular dichroism and two-photon circular dichroism (TPCD) of Au25[(Capt)18]− (where Capt is captopril). TPCD is found to be two orders of magnitude higher than one-photon circular dichroism.