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- W1978013994 abstract "Abstract The complex p-NPNN*Cu(hfac)2 (p-NPNN ˭ p-nitrophenyl nitronylnitroxide and hfac˭hexafluoroacetylacetonate) crstallizes into the triclinic P1 space group [a=12.515(3) Å, b=12.54(2) Å, c=11.610(3) Å, α = 106.18(2)°, β=119.15(2)°, γ=91.14(2)° V=1501.7(6) Å3, Z=2]. The structure consists of an alternating chain of p-NPNN and Cu(hfac)2 in which p-NPNN bridges two nonequivalent copper ions occupying the axial positions. The chains are connected by a π-π and head-to-tail overlap of the p-NPNN molecules, resulting in a two-dimensional network. The high-temperature magnetic susceptibilities can be interpreted in terms of a ferromagnetic intrachain interaction of J/k B=14.3 K and an antiferromagnetic interchain interaction of zJ′/k B =−2.6 K. The observed interchain interaction which would originate in the overlap of p-NPNN is much stronger than those in the related Cu(II) materials reported so far. The low-temperature magnetic susceptibilities indicate an antiferromagnetic order at T N=1.22 ±0.01 K, followed by an enhancement of the susceptibility below T c=0.6 ±0.1 K, probably due to a spin canting." @default.
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- W1978013994 date "1997-04-01" @default.
- W1978013994 modified "2023-10-11" @default.
- W1978013994 title "Ferromagnetic Linear Chain of p-NPNN*Cu(hfac)2 with Enhanced Interchain Interaction" @default.
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- W1978013994 doi "https://doi.org/10.1080/10587259708032327" @default.
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