Related Experiment Video
Updated: May 10, 2025

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy
Published on: July 25, 2022
Multichromatic Anti-Stokes Photon Upconversion through BNOSe Sensitization
Yaxiong Wei1, Jinsong Shao1, Kai Yi1
1Anhui Province Key Laboratory for Control and Applications of Optoelectronic Information Materials, School of Physics and Electronic Information, Anhui Normal University, Wuhu 241002, P. R. China.
Abstract:
Triplet-triplet annihilation upconversion (TTA-UC) has become an important sensing technique due to its ability to eliminate tissue autofluorescence interference. However, its quantitative application in oxygen sensing within complex systems remains fundamentally constrained. To overcome this limitation and explore synergistic anti-Stokes mechanisms, we developed a heavy-metal-free photosensitizer (BNOSe) via multiresonance architecture engineering. This innovation enables the creation of the first integrated platform capable of simultaneous TTA-UC and oxygen-resistant single-photon absorption upconversion (SPA-UC). The optimized system exhibits remarkable performance: it converts deep-red light (640 nm) into dual emissions at 617 nm (orange) and 412 nm (blue), achieving a record TTA-UC quantum yield of 19.3% with a 1.07 eV anti-Stokes shift, the largest value reported for visible-to-blue TTA-UC using metal-free sensitizers. Importantly, the oxygen-dependent TTA-UC and oxygen-resistant SPA-UC channels establish a self-calibrating sensing paradigm, showcasing multimodal capabilities in oxygen-probing bioimaging and multicolor analyte detection.
More Related Videos
11:20An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation
Published on: August 30, 2017
11:26Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
Related Concept Videos
Deactivation Processes: Jablonski Diagram
Photoreceptors and Visual Pathways
Super-resolution Fluorescence Microscopy
Nuclear Overhauser Enhancement (NOE)
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation