Chiral and kryptoracemic Dy(III) complexes with field-induced single molecule magnet behavior

Zhang, Ying-Ying, Yu, Jing-Tao, Li, Bo, Li, De-Jing, Gu, Zhi-Gang, Sun, Xiao-Fan, Cai, Hong-Ling, Kostakis, George E and Peng, Guo (2018) Chiral and kryptoracemic Dy(III) complexes with field-induced single molecule magnet behavior. CrystEngComm, 20 (32). pp. 4582-4589. ISSN 1466-8033

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Two mononuclear Dy(III) compounds formulated as [Dy(PNO)6(H2O)2]Br3 (1) and [Dy(PNO)6(NO3)](ClO4)2 (2) have been synthesized and characterized. Single crystal X-ray diffraction studies show that chiral and kryptoracemic strcuctures are formed when different anions are introduced into the system. 1 crystallizes in the non-polar orthorhombic space group P212121, whereas 2 assembles as a kryptoracemate in the polar monoclinic space group P21. The optical activity of single crystals of these two compounds was confirmed by circular dichroism (CD) studies. Thermal gravimetric analyses (TGA) revealed that they are stable up to 376 K (1) and 428 K (2). Differential scanning calorimetry (DSC) measurements demonstrate the absence of structural phase transitions over the investigated temperature range. Magnetic studies show that both compounds are field-induced single molecule magnets (SMMs) with energy barriers of 36 (± 0.8) K for 1 and 32 (± 1.4) K for 2. Furthermore, the dielectric and ferroelectric properties of compound 2 were also investigated.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry > QD0146 Inorganic chemistry
Depositing User: Georgios Kostakis
Date Deposited: 10 Jul 2018 15:04
Last Modified: 24 Oct 2018 16:11

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