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The up-conversion (UC) of photon energy was attempted for the system of a colloidal clay dispersion through the mechanism of triplet-triplet annihilation. Tris(1,10-phenanthroline)ruthenium(II) ([Ru(phen)3]2+) and 9, 10-diphenylanthracne (DPA) were used as a donor and an acceptor, respectively. A used clay mineral was synthetic saponite. A medium was 1:1:0.1 (v/v) methanol/dichloromethane/water. Δ-[Ru(phen)3]2+ (4.9 × 10−5 M) was adsorbed by SAP (3.8 × 10−4 M) to 26% CEC. The dispersion was irradiated by a laser light (0.5 mW) at 450 nm in the presence of DPA (4.2 × 10−3 M). An emission with the peak around 430 nm was observed under air. It implied the Ru(II) complex adsorbed by a colloidal clay acted as a donor to achieve UC. Quantum yield of UC was estimated to be 0.009 ± 0.003. The effect of stereoselectivity was investigated when a chiral donor/acceptor pair was employed.

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• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: Up-conversion, Synthetic saponite, Ruthenium(II) complex, 9,10-Diphenylanthracne, Stereoselectivity

Date published: 2024-05-11

Publisher: Elsevier BV

Journal:

• Applied Clay Science (ISSN: 01691317) vol. 255 107397

Funding:

• Japan Society for the Promotion of Science 17H03044
• Japan Society for the Promotion of Science 20K21090
• Japan Society for the Promotion of Science 22H02033

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4515

First published URL: https://doi.org/10.1016/j.clay.2024.107397

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Updated at: 2024-05-24 10:53:42 +0900

Published on MDR: 2026-05-12 08:27:29 +0900