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Tetranuclear lanthanide-based silsesquioxanes: towards a combination of a slow relaxation of the magnetization and a luminescent thermometry.

ABSTRACT: Lanthanide-based silsesquioxanes constitute an emerging family of cage-like metallasilsesquioxanes with exciting optical and magnetic properties. We report here the synthesis, structures and luminescence properties of a series of tetranuclear lanthanide-silsesquioxane compounds of general formula [NEt4]2[(Ph4Si4O8)2(Ln/Ln')4(NO3)6(EtOH)2(MeCN)2]·4(MeCN) with different lanthanide ions (where Ln/Ln' = Dy3+/Eu3+ (1), Dy3+/Tb3+ (2) and Eu3+/Tb3+/Y3+ (3)) and investigate the impact of the lanthanide ions combination on magnetic and photo-luminescent properties. Compound 1 behaves as a field-induced Single Molecule Magnet (SMM) and presents temperature-dependent luminescence characteristics of Eu3+ making it an emissive thermometer working in the temperature range 293-373 K with the maximum relative sensitivity of 1.15% K-1 achieved at 293 K. Compounds 2 and 3 are paramagnets, which demonstrate a characteristic photoluminescence with Dy3+ to Tb3+ and Tb3+ to Eu3+ energy transfers, respectively.

SUBMITTER: Felix G 

PROVIDER: S-EPMC10476019 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature

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Tetranuclear lanthanide-based silsesquioxanes: towards a combination of a slow relaxation of the magnetization and a luminescent thermometry.

Félix Gautier G   Sene Saad S   Kulakova Alena A   Bilyachenko Alexey N AN   Khrustalev Victor N VN   Shubina Elena S ES   Guari Yannick Y   Larionova Joulia J  

RSC advances 20230801 37

Lanthanide-based silsesquioxanes constitute an emerging family of cage-like metallasilsesquioxanes with exciting optical and magnetic properties. We report here the synthesis, structures and luminescence properties of a series of tetranuclear lanthanide-silsesquioxane compounds of general formula [NEt<sub>4</sub>]<sub>2</sub>[(Ph<sub>4</sub>Si<sub>4</sub>O<sub>8</sub>)<sub>2</sub>(Ln/Ln')<sub>4</sub>(NO<sub>3</sub>)<sub>6</sub>(EtOH)<sub>2</sub>(MeCN)<sub>2</sub>]·4(MeCN) with different lanthani  ...[more]

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