Title
Fluorescence On/Off Switching in Nanoparticles Consisting of Two Types of Diarylethenes
Author
Tatsumoto Nakahama, Daichi Kitagawa, Hikaru Sotome, Tuyoshi Fukaminato, Syoji Ito, Hiroshi Miyasaka, Seiya Kobatake
Year
2018
Journal
ACS Omega
Abstract
Single- and double-component nanoparticles consisting of two types of diarylethenes, 1,2-bis(3-methyl-5-phenyl-2-thienyl)perfluorocyclopentene (1a) and 1,2-bis(2-methyl-5-phenyl-3-thienyl)perfluorocyclopentene (2a), were fabricated by a reprecipitation method. Nanoparticles consisting of 1a exhibited orange or green fluorescence depending on the fabrication condition and did not undergo any photocyclization reaction. On the other hand, nanoparticles consisting of 2a underwent photoreversible photochromic reactions upon alternating irradiation with ultraviolet and visible light. Nanoparticles consisting of 1a and 2a exhibited fluorescence on/off switching with rapid switching speed and high on/off contrast, accompanying the photochromic reactions of 2a. The dependence of fluorescence on/off switching properties on Förster distance and molar fraction was observed and quantitatively evaluated by a simplified model.
Instrument
FP-8300
Keywords
Fluorescence, Quantum yield, Nanostructures, Materials