Aggregation of [Ln III 12] clusters by the dianion of 3-formylsalicylic acid. Synthesis, crystal structures, magnetic and luminescence properties

Dinca AS, Mindru A, Dragancea D, Tiseanu C, Shova S, Cornia S, Carrella LM, Rentschler E, Affronte M, Andruh M (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Dalton Transactions Royal Society of Chemistry

Book Volume: 48

Pages Range: 1700-1708

Journal Issue: 5

DOI: 10.1039/c8dt04602f

Abstract

Three isostrucutral dodecanuclear clusters with the general formula [Ln 12 (fsa) 12 (μf 3 -OH) 12 (DMF) 12 ]·nDMF (fsa 2- is the dianion of 3-formylsalicylic acid; Ln = Eu 1, Gd 2, Dy 3) have been obtained from the reaction of fromylsalicyclic acid (H 2 fsa), tetrabutylammonium hydroxide and Ln(NO 3 ) 3 ·6H 2 O in methanol/DMF. Their structure consists of four vertex-sharing heterocubanes. Each heterocubane unit is assembled from four Ln III ions, three μ 3 -OH groups and one μ 3 -oxygen atom arising from the fsa 2- carboxylato group. The photophysical properties of the europium derivative investigated at both 300 and 80 K sustain a relative intense emission obtained under low power LED excitation at 420 nm. The dysprosium derivative shows a SMM behavior with an effective energy barrier U eff of 22.9 cm -1 , while the thermodynamical properties of Gd 12 confirm a large magnetocaloric effect: S(7 T) - S(0 T) = 20R = 166 J mol -1 K), typical for isotropic Gd III derivatives, with ΔS = S(7 T) - S(0 T) = 1.7R for each Gd III ion.

Involved external institutions

University of Bucharest / Universitatea din București RO Romania (RO) Institute of Chemistry / Institutul de Chimie MD Moldova, Republic of (MD) Laboratory of Solid-State Quantum Electronics RO Romania (RO) "Petru Poni" Institute of Macromolecular Chemistry RO Romania (RO) Università degli Studi di Modena e Reggio Emilia (UNIMORE) IT Italy (IT) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE)

How to cite

APA:

Dinca, A.S., Mindru, A., Dragancea, D., Tiseanu, C., Shova, S., Cornia, S.,... Andruh, M. (2019). Aggregation of [Ln III 12] clusters by the dianion of 3-formylsalicylic acid. Synthesis, crystal structures, magnetic and luminescence properties. Dalton Transactions, 48(5), 1700-1708. https://doi.org/10.1039/c8dt04602f

MLA:

Dinca, Alina S., et al. "Aggregation of [Ln III 12] clusters by the dianion of 3-formylsalicylic acid. Synthesis, crystal structures, magnetic and luminescence properties." Dalton Transactions 48.5 (2019): 1700-1708.

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