Related Experiment Video
Updated: Jun 5, 2025

Author Spotlight: Advancing Bioimaging and Therapy with Functional Nanomaterials
Published on: September 13, 2024
Luminescence and Generation of Reactive Oxygen Species in Solution by Ta6Br12 Clusters
Jhon Sebastián Hernández1, Pedro Atienzar1, Maxim Shamshurin2
1Instituto de Tecnología Química, Universitat Politècnica de València - Agencia Estatal Consejo Superior de Investigaciones Científicas, Avd. de los Naranjos s/n, 46022, Valencia, Spain.
Abstract:
An intrinsic metal cluster NIR-II emission of the {Ta6Br12}2+ aqua/hydroxocomplexes was determined in aqueous solutions under inert atmosphere. The photoluminescence (PL) is enhanced in D2O, and the lifetime scale expands from nanoseconds to microseconds. Possible cluster emission transitions have been assigned and analyzed from a computational perspective. In the presence of O2, the cluster compound kept its robustness but showed partial quenching of the PL. Stern-Volmer and laser-flash photolysis studies confirmed that quenching is mainly associated with O2 diffusion. Laser-flash photolysis experiments showed that singlet oxygen (1O2) was not detected under measurement conditions. Generation of peroxide and superoxide radical species after irradiation in D2O was confirmed by using luminol as a probe, whereas no hydroxide radical species were detected as evidenced by the emission of the 3-coumarin carboxylic acid (3-CCA) molecular sensor.
More Related Videos
Related Concept Videos
Photoluminescence: Applications
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Deactivation Processes: Jablonski Diagram
Variables Affecting Phosphorescence and Fluorescence

