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

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posted on 2023-06-09, 14:07 authored by Ying-Ying Zhang, Jing-Tao Yu, Bo Li, De-Jing Li, Zhi-Gang Gu, Xiao-Fan Sun, Hong-Ling Cai, George KostakisGeorge Kostakis, Guo Peng
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.

History

Publication status

  • Published

File Version

  • Accepted version

Journal

CrystEngComm

ISSN

1466-8033

Publisher

Royal Society of Chemistry

Issue

32

Volume

20

Page range

4582-4589

Department affiliated with

  • Chemistry Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2018-07-10

First Open Access (FOA) Date

2019-07-11

First Compliant Deposit (FCD) Date

2018-10-24

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