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- Title
Giant Amplification of Photoswitching by a Few Photons in Fluorescent Photochromic Organic Nanoparticles.
- Authors
Su, Jia; Fukaminato, Tuyoshi; Placial, Jean‐Pierre; Onodera, Tsunenobu; Suzuki, Ryuju; Oikawa, Hidetoshi; Brosseau, Arnaud; Brisset, François; Pansu, Robert; Nakatani, Keitaro; Métivier, Rémi
- Abstract
Controlling or switching the optical signal from a large collection of molecules with the minimum of photons represents an extremely attractive concept. Promising fundamental and practical applications may be derived from such a photon-saving principle. With this aim in mind, we have prepared fluorescent photochromic organic nanoparticles (NPs), showing bright red emission, complete ON-OFF contrast with full reversibility, and excellent fatigue resistance. Most interestingly, upon successive UV and visible light irradiation, the NPs exhibit a complete fluorescence quenching and recovery at very low photochromic conversion levels (<5 %), leading to the fluorescence photoswitching of 420±20 molecules for only one converted photochromic molecule. This 'giant amplification of fluorescence photoswitching' originates from efficient intermolecular energy-transfer processes within the NPs.
- Subjects
PHOTOELECTRIC devices; OPTICAL properties; NANOPARTICLES; PHOTONS; PHOTOCHROMIC materials; PHOTOELECTRIC measurements; FLUORESCENCE
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 11, p3726
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201510600