リンク集 RSS/ATOM 記事

タイトル: Optically Distinguishable Electronic Spin-isomers of a Stable Organic Diradical著者: Shimizu, Daiki; Sotome, Hikaru; Miyasaka, Hiroshi; Matsuda, Kenji抄録: Herein, we introduce a model of electronic spin isomers, the electronic counterpart of nuclear spin isomers, by using a stable organic diradical. The diradical, composed of two benzotriazinyl radicals connected by a rigid triptycene skeleton, exhibits a small singlet–triplet energy gap of −3.0 kJ/mol, indicating ca. 1:1 coexistence of the two spin states at room temperature. The diradical shows characteristic near-IR absorption bands, which are absent in the corresponding monoradical subunit. Variable temperature measurements revealed that the absorbance of the NIR band depends on the abundance of the singlet state, allowing us to identify the NIR band as the singlet-specific absorption band. It enables photoexcitation of one of the two spin states coexisting in thermal equilibrium. Transient absorption spectro ...

タイトル: Real-time ionospheric tomography using GNSS-TEC著者: Yoneyama, Satoru; Umeno, Ken抄録: Ionospheric electron number density distribution data for the night of July 15, 2023, as estimated by ionospheric tomography. Computation time of ionospheric tomography. Eigenvalue distribution of the coefficient matrix of ionospheric tomography.

国立国会図書館デジタルコレクションの「大日本沿海実測録 首巻,1」のp.99前後に、緯度（北極高）と、地点間の距離が記録されている。（上記URL、2024年2月9日参照）回答プロセス:国立国会図書館デジタルコレクションにて、検索ワード「越前」、タイトル「日本沿海実測録」にて検索。

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