Issue 9, 2007
From the journal:

CrystEngComm

Magnetic properties tuned by oxamido bridging ligand derivatives in two new hybrid organic inorganic nitronyl nitroxide copper(ii) complexes†‡

Jian-Ying Zhang,ac   Cai-Ming Liu,*a   De-Qing Zhang,a   Song Gaob  and  Dao-Ben Zhu*a  

* Corresponding authors

a Beijing National Laboratory for Molecular Sciences, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
E-mail: cmliu@iccas.ac.cn, zhudb@iccas.ac.cn
Fax: +86 1062559373
Tel: +86 1082615007

b State Key Laboratory of Rare Earth Materials and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, P. R. China

c Graduate School, Chinese Academy of Sciences, Beijing, P. R. China

Abstract

The change of the alkyl chain length in N,N-bis(coordinating group)-substituted oxamides was observed to be able to tune the structures of two new radical complexes[Cu2(oxen)(4-NITPhPy)2](ClO4)2 (1) [oxen = N,N-bis(2-aminoethyl)oxamide] and [Cu2(oxpn)(4-NITPhPy)2](ClO4)2·H2O (2) [oxpn = N,N-bis(2-aminopropyl)oxamide], which constructed from trans-oxamido-bridged Cu(II)–Cu(II) dinuclear building blocks and a new nitronyl nitroxide, 2-[4-(4-pyridyl)phenyl]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (4-NITPhPy): 1 possesses a dinuclear structure while 2 shows a 1D chain structure. The magnetic data of 1 could be analyzed using a model derived from the Cu(II)–Cu(II) dinuclear building block with two nitroxide terminal ligands, giving J1 = −286 cm−1, J2 = −6 cm−1 and θ = −3.95 K. The magnetic interactions in 2 were simulated by an appropriate uniform chain model composed of the tetraspin [Cu2-(NIT)2] units. The best fitting gives J1 = −213.5 cm−1, J2 = 19.13 cm−1 and Jc = −2.11 cm−1.

Graphical abstract: Magnetic properties tuned by oxamido bridging ligand derivatives in two new hybrid organic inorganic nitronyl nitroxide copper(ii) complexes

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Article information

DOI
https://doi.org/10.1039/B704127F
Article type
Paper
Submitted
19 Mar 2007
Accepted
04 Jun 2007
First published
25 Jun 2007

CrystEngComm, 2007,9, 799-805

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Magnetic properties tuned by oxamido bridging ligand derivatives in two new hybrid organic inorganic nitronyl nitroxide copper(II) complexes

J. Zhang, C. Liu, D. Zhang, S. Gao and D. Zhu, CrystEngComm, 2007, 9, 799 DOI: 10.1039/B704127F

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