担当区分：筆頭著者   掲載種別：研究論文（学術雑誌）   出版者・発行元：IOP Publishing  

Abstract

Conventional photon upconversion (PUC) methods using intersystem crossing suffer from low efficiency of incident light utilization due to lowering light absorption to avoid suppression of triplet exciton deactivation by sensitizer aggregation. In this study, to overcome the difficulty, a combination of donor and acceptor materials was investigated to develop a blue PUC that relies on triplet formation by charge separation and recombination at the solid-state interface. An anthracene derivative was used for the donor and naphthalene diimide with visible light absorption was designed and synthesized for the acceptor. The key design principle of the acceptor material was controlling the energy level to proceed with charge separation and recombination emission at the interface with the anthracene. Using this study as a strategy for material selection opens the possibility of achieving solid-state PUC that exhibits a variety of emission wavelengths.

DOI： 10.35848/1347-4065/ae0223

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その他リンク： https://iopscience.iop.org/article/10.35848/1347-4065/ae0223/pdf

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

<jats:title>Abstract</jats:title><jats:p>We found that our optically CO<jats:sub>2</jats:sub>‐responsive polydimethylsiloxane (PDMS) elastomer rapidly and reversibly underwent both visible and fluorescent color changes in the presence of CO<jats:sub>2</jats:sub> gas. Unlike conventional optically CO<jats:sub>2</jats:sub>‐responsive polymeric materials, it functions in totally dry gaseous conditions. The visible color and fluorescence of the elastomer sheet change after only 1 min of exposure to CO<jats:sub>2</jats:sub>, and the sheet exhibits excellent repeatability in terms of color switching that persists for at least 20 times.</jats:p>

DOI： 10.1002/asia.202300798

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

<jats:title>Abstract</jats:title><jats:p>We have developed a functional‐group‐tolerant one‐pot route to various 3‐substituted 1‐trifluoromethylpropargyl alcohols utilizing two reactions of cyclopentylmagnesium bromide with trifluoroacetic acid esters and terminal alkynes. This new synthetic method involves three successive reactions in a one‐pot process: 1) deprotonation of terminal alkynes with cyclopentylmagnesium bromide, 2) reduction of 2,2,2‐trifluoroethyl trifluoroacetate with cyclopentylmagnesium bromide, and 3) nucleophilic addition of in‐situ‐generated alkynyl Grignard reagents to in‐situ‐formed trifluoroacetaldehyde, leading to the corresponding 3‐substituted 1‐trifluoromethylated propargyl alcohols. This method can be applied to various fluorine‐containing esters as well as terminal alkynes bearing alkyl and aryl groups to give 1‐polyfluoroalkylated propargyl alcohols. The obtained 1‐trifluoromethylpropargyl alcohols with aromatic groups can be converted in good to excellent yields to 1,5‐diaryl‐3‐trifluoromethyl‐dihydropyrazoles, some of the most important motifs in medicine for the treatment of pain and inflammation associated with osteoarthritis in dogs.</jats:p>

DOI： 10.1002/ajoc.202100700

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

<jats:p>The prepared ring-perfluorinated trimethine cyanine dye 2a has a significantly higher response to <jats:italic>n</jats:italic>-hexylamine than the non-fluorinated dye 2b, and exhibited a dual change in the solution and on filter paper and fluorescence color at widely shifted wavelengths, visible to the naked eye.</jats:p>

DOI： 10.1039/d2ra04387d

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

<p>A highly diastereo- and enantioselective organocatalytic method to synthesise erythritols bearing a trifluoromethyl group has been investigated.</p>

DOI： 10.1039/d0ob02067b

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