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• W1906071569 abstract "Abstract Eight novel europium(III)‐based coordination compounds with 1,10‐phenanthroline (phen) ligands with a chloro, methoxy, ethoxy, cyano, carboxylic acid, methyl carboxylate, ethyl carboxylate, and amino substituent on the 2‐position have been prepared in yields ranging from 43 to 89 %. Additionally, one lanthanum(III) coordination compound of 2‐amino‐1,10‐phenanthroline has been isolated. All compounds have the general formula [Ln( L ) 2 (NO 3 ) 3 ], except for the compound with the carboxylate ligand, which has the formula [Eu(O 2 Cphen) 3 ]. Three of the Eu III complexes as well as the La III compound crystal structures have been determined, all of which show similar N 4 O 6 coordination spheres for the Ln III ion. Seven compounds exhibit bright luminescence that is characteristic of Eu III upon irradiation with near‐UV radiation, thus indicating efficient ligand‐to‐metal energy transfer. The complex with 2‐amino‐1,10‐phenanthroline is nonluminescent. The solid‐state photoluminescent quantum yields range from 10 to 79 %, and the luminescence lifetimes vary from 0.43 to 1.57 ms. Analysis of the spectral intensities with the Judd–Ofelt theory shows a significant contribution of nonradiative processes that quench the luminescence of the 5 D 0 level on Eu III ." @default.
• W1906071569 created "2016-06-24" @default.
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• W1906071569 date "2013-11-15" @default.
• W1906071569 modified "2023-10-10" @default.
• W1906071569 title "Substituted Phenanthrolines as Antennae in Luminescent Eu ^III Complexes" @default.
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• W1906071569 doi "https://doi.org/10.1002/ejic.201301000" @default.
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