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- W2068752110 abstract "Magnetic properties of Fe(II) meso-tetra(4-pyridyl)porphyrin [Fe(TpyP)], a recently discovered metalloporphyrin network, were investigated using magnetic susceptibility M(T)∕H, isothermal magnetization M(H), and heat capacity C(T) measurements. The crystal structure of Fe(TpyP) at room temperature is orthorhombic with a space group Cmca (No. 64). This network gives rise to an unprecedented two-dimensional paddle-wheel-like pattern (a 44 topology). The results of M(T)∕H on powder samples of Fe(TpyP) show that the effective moment μeff of Fe2+ is 5.52μB at 340K, close to the expected value for a high spin Fe2+ (S=2) ion. μeff increases to 5.90μB as T decreases to the range of 170K<T<220K, and then decreases monotonically as T decreases further. The behavior of μeff in the high temperature region may be attributed to a positive Fe2+–Fe2+ coupling. The low field (H⩽4kG) M(T)∕H data reveal an anomalous behavior of this compound in the low temperature region which seems spin-glass-like. A small hysteresis was observed in M(H) measured at 2K. No anomaly was seen in the C(T) data from 1.6to25K." @default.
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- W2068752110 date "2007-04-03" @default.
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- W2068752110 title "Magnetic properties of an Fe(II) <i>meso</i>-tetra(4-pyridyl)porphyrin network" @default.
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- W2068752110 doi "https://doi.org/10.1063/1.2710458" @default.
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