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Issue 18, 2018
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A functional nitroxide ligand builds up two 2p–3d complexes with different spin ground states and a 2p–3d–4f chain of rings

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Abstract

Three new metal complexes derived from a functional nitronyl nitroxide ligand, 2-(4-(3-pyridinylmethoxy)phenyl)-4,4,5,5-tetramethyl-imidazolyl-1-oxyl-3-oxide (NIT-3PyPh) and M(hfac)2 or/and Y(hfac)3 (M2+ = Cu2+, Mn2+; hfac = hexafluoroacetylacetonate), [(Mn(hfac)2)2(NIT-3PyPh)2] (1), [(Cu(hfac)2)4 (NIT-3PyPh)2] (2) and [Y(hfac)3{Cu(hfac)2(NIT-3PyPh)}2] (3) have been synthesized and characterized. 1 is a four-spin complex with a dimeric structure, whereas 2 consists of a six-spin ground state, which includes a cyclic molecular structure with two Cu(hfac)2 units linked by free NO groups. Complex 3 consists of a one-dimensional chain in which the Y(hfac)3 molecules bridge the dimeric [Cu(hfac)2(NIT-3PyPh)]2 units. Magnetic studies show that complex 1 exhibits a strong antiferromagnetic (AFM) coupling between the MnII ion and directly bonded nitroxide and weak ferromagnetic (FM) interaction between the two Mn–NIT pairs. For complex 2, the FM and/or AFM interaction depends on the axial or equatorial type of coordination of the NO group. The AFM interactions are dominant in complex 3, due to the strong radical–radical AFM exchange interactions through the YIII ion.

Graphical abstract: A functional nitroxide ligand builds up two 2p–3d complexes with different spin ground states and a 2p–3d–4f chain of rings

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Publication details

The article was received on 03 Feb 2018, accepted on 05 Apr 2018 and first published on 05 Apr 2018


Article type: Paper
DOI: 10.1039/C8CE00178B
Citation: CrystEngComm, 2018,20, 2583-2592
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    A functional nitroxide ligand builds up two 2p–3d complexes with different spin ground states and a 2p–3d–4f chain of rings

    M. Zhu, D. Lou, X. Deng, L. Zhang, W. Zhang and Y. Lü, CrystEngComm, 2018, 20, 2583
    DOI: 10.1039/C8CE00178B

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