Naslov
Gold‐Doping Effect on Two‐Photon Absorption and Luminescence of Atomically Precise Silver Ligated Nanoclusters

Autori
Pniakowska, Anna ; Kumaranchira Ramankutty, Krishnadas ; Obstarczyk, Patryk ; Perić Bakulić, Martina ; Sanader Maršić, Željka ; Bonačić‐ Koutecký, Vlasta ; Bürgi, Thomas ; Olesiak‐Bańska, Joanna

Izvornik
Angewandte Chemie. International edition (1433-7851) 61 (2022), 43; E202209645, 9

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Gold nanoclusters ; photoluminescence ; TDDFT

Sažetak
Noble metal nanoclusters allow for the atomically- precise control of their composition. However, to create nanoclusters with pre-defined optical properties, comprehensive description of their structure-property relation is required. Here, we report the gold atom doping impact on one-photon and two-photon absorption (TPA) and luminescence properties of ligated silver nanoclusters via combined experimental studies and time-dependent density functional theory simulations (TD-DFT). We synthesized a series of Ag25−xAux(DMBT)18 nanoclusters where x=0, 1 and 5–10. For Ag24Au1(DMBT)18 we demonstrate that the presence of the central Au dopant strongly influences linear and non-linear optical properties, increasing photoluminescence quantum yield and two-photon brightness, with respect to undoped silver nanoclusters. With improved TPA and luminescence, atomically-precise AuAg alloys presented in our work can serve as robust luminescent probes e.g. for bioimaging in the second biological window.

Izvorni jezik
Engleski

Znanstvena područja
Interdisciplinarne prirodne znanosti

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