Efficient NIR-I fluorescence photoswitching based on giant fluorescence quenching in photochromic nanoparticles

Shinya Yamasaki; Sanae Ishida; Sunnam Kim; Mihoko Yamada; Takuya Nakashima; Tsuyoshi Kawai; Seiji Kurihara; Tuyoshi Fukaminato

doi:10.1039/d1cc01389k

Efficient NIR-I fluorescence photoswitching based on giant fluorescence quenching in photochromic nanoparticles

Chem Commun (Camb). 2021 Jun 1;57(44):5422-5425. doi: 10.1039/d1cc01389k.

Authors

Shinya Yamasaki¹, Sanae Ishida¹, Sunnam Kim¹, Mihoko Yamada², Takuya Nakashima², Tsuyoshi Kawai², Seiji Kurihara¹, Tuyoshi Fukaminato¹

Affiliations

¹ Department of Applied Chemistry & Biochemistry, Graduate School of Science & Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan. tuyoshi@kumamoto-u.ac.jp.
² Division of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan.

PMID: 33949476
DOI: 10.1039/d1cc01389k

Abstract

A photoswitchable near-infrared (NIR) fluorescent nanoparticle (NP) was designed and prepared. The NP showed a characteristic AIE property and high-contrast NIR fluorescence photoswitching with full reversibility. Such efficient NIR fluorescence photoswitching originated from the amplified fluorescence quenching mechanism based on intermolecular energy transfer in a densely packed NP state.

MeSH terms

Fluorescence Resonance Energy Transfer*
Fluorescent Dyes / chemistry*
Infrared Rays
Microscopy, Fluorescence
Molecular Structure
Nanoparticles / chemistry*
Photochemical Processes

Substances

Fluorescent Dyes