Manganese tetraphenylporphyrin bromide and iodide. Studies of structures and magnetic properties
Manganese tetraphenylporphyrin bromide and iodide. Studies of structures and magnetic properties
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四苯基卟啉溴化物和碘化物。
DOI:
10.1016/j.poly.2020.114488
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发表时间:
2020
期刊:
影响因子:
2.6
通讯作者:
Podlesnyak, Andrey A.
中科院分区:
文献类型:
--
作者:
Bone, Alexandria N.;Stavretis, Shelby E.;Krzystek, J.;Liu, Zhiming;Chen, Qiang;Gai, Zheng;Wang, Xiaoping;Steren, Carlos A.;Powers, Xian B.;Podlesnyak, Andrey A.
Manganese tetraphenylporphyrin bromide and iodide Mn(TPP)X (X = Br,2; I,3; TPP2−=meso-tetraphenylporphyrinate) are synthetic analogs of Mn(III) geoporphyrins. Crystal structures of2and3with chloroform in the lattices, Mn(TPP)Br·CHCl3(2·CHCl3), Mn(TPP)I·CHCl3(3·CHCl3), Mn(TPP)I·CDCl3(3·CDCl3in a different space group from3·CHCl3), Mn(TPP)I·1.5CHCl3(3·1.5CHCl3), and2with dichloromethane in the lattice, Mn(TPP)Br·CH2Cl2(2·CH2Cl2), have been determined by single-crystal X-ray diffraction at 100 K or 298 K. Hirshfeld surface analyses of the crystal structures of2·CHCl3,2·CH2Cl2,3·CHCl3,3·CDCl3and3·1.5CHCl3have been performed. Surprisingly the Mn(III)–Br and Mn(III)–I bonds in Mn(TPP)X (2–3) are about 0.2 Å (8%) longer than Fe(III)–Br and Fe(III)–I bonds inS= 5/2 Fe(TPP)X (X = Br,4; I,5), although both Mn(III) and Fe(III) ions have the same radii. Magnetic properties of2and3have been studied by direct current (DC) and alternating current (AC) susceptibility measurements, high-field electron paramagnetic resonance (HFEPR), and inelastic neutron scattering (INS). With four unpaired electrons in Mn(TPP)X (X = Br,2; I,3), the bromide complex2in2·CDCl3possesses easy-axis anisotropy, as does the chloride analog Mn(TPP)Cl (1), with the axial (D) and rhombic (E) zero-field splitting parameters ofD= –1.091(3) cm−1and |E|= 0.087(2) cm−1. The iodide complex3in3·CDCl3becomes easy-plane withD= +1.30(1) cm−1and |E|= 0.010(5) cm−1. Axial ZFS parametersDchange from −2.290(5) cm−1in1, reported earlier, to −1.091(3) cm−1in2and +1.30(1) cm−1in3.
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影响因子:
4.6
作者:
Krzystek, J;Telser, J;Brunel, LC
通讯作者:
Brunel, LC
DOI:
--
发表时间:
1980
期刊:
影响因子:
--
作者:
D. Behere;S. Mitra
通讯作者:
S. Mitra
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
P. Turner;M. Gunter;B. Skelton;Allan H. White
通讯作者:
Allan H. White
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
R. Armstrong;G. Foran;T. Hambley
通讯作者:
T. Hambley
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
J. Krzystek
通讯作者:
J. Krzystek