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Chiral and kryptoracemic Dy(III) complexes with field-induced single molecule magnet behavior
- Publication Year :
- 2018
- Publisher :
- Royal Society of Chemistry, 2018.
-
Abstract
- 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.
- Subjects :
- Circular dichroism
Materials science
010405 organic chemistry
General Chemistry
Dielectric
010402 general chemistry
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Crystallography
Differential scanning calorimetry
Molecule
General Materials Science
Orthorhombic crystal system
Single-molecule magnet
QD0146
Single crystal
Monoclinic crystal system
Subjects
Details
- Language :
- English
- ISSN :
- 14668033
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....f7ac781170be489e9738f5a72884aa7d