TY - JOUR
T1 - A helical salicyladoxime-based manganese triangle chain with single-molecule magnet behavior
AU - Feng, Po Yeng
AU - Yang, Chen I.
AU - Huang, Po Jung
AU - Lee, Gene Hsiang
AU - Tsai, Hui Lien
N1 - Funding Information:
The dc magnetic measurements were obtained from SQUID (MPMS XL-7) at the National Sun Yat-Sen University. The authors acknowledge the Instrument Center of National Cheng Kung University for the XPS measurements (PHI 5000 VersaProbe) and the elemental analysis, and the Ministry of Science and Technology of Taiwan for financial support under Grant NSC99-2113-M-006-003-MY3 .
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/5
Y1 - 2015/5
N2 - The reaction of 2-hydroxyphenylpropanone oxime (Et-H2salox) with Mn(NO3)2·4H2O, NEt3 and 1,3-bis(4-pyridyl)propane-N,N′-dioxide (bppo) in EtOH/H2O mixture afforded a one-dimensional coordination polymer with the formula [Mn3O(Et-salox)3(bppo)(MeOH)(H2O)3](NO3)0.5(Et-Hsalox)0.5·MeOH·H2O (1·MeOH·H2O). 1·MeOH·H2O had a manganese triangle structure, [MnIII3O]7 +, which was used as a building unit for a subsequent assembly of an oximate and central oxide. The flexible bppo ligand linked the units, resulting in the formation of a 1D helical structure. Variable temperature direct current magnetic susceptibility measurements of complex 1·MeOH·H2O were carried out. Exchange interactions of the metal centers of complex 1·MeOH·H2O were examined, and the results indicate that both ferro- and antiferromagnetic interactions simultaneously coexist in 1·MeOH·H2O, resulting in an S = 2 ground state. Moreover, complex 1·MeOH·H2O shows the frequency dependence of the out-of-phase component in alternating current magnetic susceptibility measurements, indicating single-molecule magnet behavior with Ueff = 28 K and τ0 = 1.8 × 10- 9 s.
AB - The reaction of 2-hydroxyphenylpropanone oxime (Et-H2salox) with Mn(NO3)2·4H2O, NEt3 and 1,3-bis(4-pyridyl)propane-N,N′-dioxide (bppo) in EtOH/H2O mixture afforded a one-dimensional coordination polymer with the formula [Mn3O(Et-salox)3(bppo)(MeOH)(H2O)3](NO3)0.5(Et-Hsalox)0.5·MeOH·H2O (1·MeOH·H2O). 1·MeOH·H2O had a manganese triangle structure, [MnIII3O]7 +, which was used as a building unit for a subsequent assembly of an oximate and central oxide. The flexible bppo ligand linked the units, resulting in the formation of a 1D helical structure. Variable temperature direct current magnetic susceptibility measurements of complex 1·MeOH·H2O were carried out. Exchange interactions of the metal centers of complex 1·MeOH·H2O were examined, and the results indicate that both ferro- and antiferromagnetic interactions simultaneously coexist in 1·MeOH·H2O, resulting in an S = 2 ground state. Moreover, complex 1·MeOH·H2O shows the frequency dependence of the out-of-phase component in alternating current magnetic susceptibility measurements, indicating single-molecule magnet behavior with Ueff = 28 K and τ0 = 1.8 × 10- 9 s.
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U2 - 10.1016/j.inoche.2015.03.034
DO - 10.1016/j.inoche.2015.03.034
M3 - Article
AN - SCOPUS:84925260711
SN - 1387-7003
VL - 55
SP - 112
EP - 115
JO - Inorganic Chemistry Communications
JF - Inorganic Chemistry Communications
ER -