期刊
JOURNAL OF COORDINATION CHEMISTRY
卷 68, 期 8, 页码 1361-1373出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958972.2015.1014350
关键词
Schiff base; Copper(II); Dinuclear; Antiferromagnetic; Field-dependent magnetization study
资金
- DST, India under FAST Track Scheme [SR/FT/CS-118/2010]
- DST, India [SR/NM/NS-1089/2011]
- CSIR, New Delhi
A double end-on azide-bridged centrosymmetric dinuclear copper(II) complex, [Cu-2(L)(2)(N-3)(2)], has been synthesized and characterized. X-ray crystal structure analysis has confirmed the structure; variable temperature (2-300 K) magnetic susceptibility measurement indicates antiferromagnetic exchange interactions with 2J = -0.45 cm(-1). A copper(II) complex, [Cu-2(L)(2)(N-3)(2)] [where HL = 2-((3-(methylamino)propylimino)methyl)-6-methoxyphenol] has been synthesized and characterized by elemental analysis, IR, UV-vis and fluorescence spectroscopy, and single-crystal X-ray diffraction studies. The complex crystallizes in the trigonal space group R (3) over bar. The deprotonated tridentate Schiff base occupies three coordination sites of copper(II). The fourth coordination site is occupied by an azide. A symmetry-related azide from a different molecule coordinates with the fifth site of copper(II), thereby forming a double end-on azide-bridged centrosymmetric dimer. Variable temperature solid-state magnetic studies between 2 and 300 K were carried out and the data indicate predominant antiferromagnetic exchange interactions with 2J = -0.45 cm(-1). The magnetic field-dependent magnetization study (M - H) reveals existence of antiferromagnetic ordering at a lower temperature (2 K) with a very small coercive field (similar to 20 Oe) suggesting soft magnet behavior of the complex.
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