New insights into the thermal stability of Mn12 clusters: The case of complex [Mn12O12(O2CCCH) 16(H2O)4]·3H2O and its thermolysis derived [Mn3(O2CCCH)6(H 2O)4]·2H2O complex

被引：3

作者：

Institut de Ciència de Materials de Barcelona , Campus Universitari de la UAB, 08193, Bellaterra, Catalonia, Spain ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

不详 ^{[4
]}

不详 ^{[5
]}

机构：

[1] Institut de Ciència de Materials de Barcelona (CSIC), Campus Universitari de la UAB, 08193, Bellaterra, Catalonia

[2] Instituto de Ciencia de Materiales de Aragón (CSIC), Universidad de Zaragoza, 50009, Zaragoza

[3] Institut Català de Nanotecnologia (ICN), Facultat de Ciències Edifici C, Campus de Bellaterra, 08193, Bellaterra

[4] Allgemeine, Anorganische und Theoretische Chemie, Universität Innsbruck, A-6020, Innsbruck

[5] Laboratoire de Chimie Moléculaire et Organisation du Solide, Université Montpellier II, 34095, Montpellier, C.C. 007, Place Eugene Bataillon

来源：

Dalton Trans. | 2007年 / 23卷 / 2450-2456期

关键词：

D O I：

10.1039/b700298j

中图分类号：

学科分类号：

摘要：

Two novel Mn12 derivatives [Mn12O12(O 2CCCH)16(H2O)4]·3H 2O (1) and [Mn12O12(O2CCCC 6H5)16(H2O)4] ·3H2O (2) have been prepared and characterized. Magnetic measurements confirm that both function as single-molecule magnets (SMM), showing frequency-dependent out-of-phase AC susceptibility signals and magnetization hysteresis curves. Thermal stability studies of both complexes were first conducted in the solid state. While complex 1 undergoes a sudden exothermal decomposition at Tonset = 118 °C, complex 2 exhibits a higher stability. Thermolysis reaction of 1 was hence assessed in solution to yield dark red crystals of a two-dimensional MnII-based co-ordination polymer [Mn3(O2CCCH)6(H2O) 4]·2H2O (3), which corresponds to an extended sheet-like structure that crystallizes in the monoclinic space group P2 1/n; a = 9.2800(2) Å, b = 9.4132(2) Å, c = 14.9675(3) Å, β = 99.630(1)°, and Z = 2. Finally, the magnetic properties of complex 3 have been studied on an oriented single crystal over two different orientations of the reciprocal vector versus the external field. © The Royal Society of Chemistry.

引用

页码：2450 / 2456

页数：6

共 44 条

[1] Christou G., Gatteschi D., Hendrickson D.N., Sessoli R., MRS Bull., 25, (2000)
[2] Gatteschi D., Sessoli R., Angew. Chem., Int. Ed., 42, (2003)
[3] Gatteschi D., Sessoli R., Villain J., Molecular Nanomagnets, (2006)
[4] Sessoli R., Gatteschi D., Caneschi A., Novak A., Nature, 365, (1993)
[5] Gatteschi D., Caneschi A., Pardi L., Sessoli R., Science, 265, (1994)
[6] Friedman J.R., Sarachik M.P., Tejada J., Ziolo R., Phys. Rev. Lett., 76, (1996)
[7] Hernandez J.M., Zhang X.X., Luis F., Bartolome J., Tejada J., Ziolo R., Europhys. Lett., 35, (1996)
[8] Thomas L., Lionti F., Ballou R., Gatteschi D., Sessoli R., Barbara B., Nature, 383, (1996)
[9] Krusin-Elbaum L., Shibauchi T., Argyle B., Gignac L., Weller D., Nature, 410, pp. 444-446, (2001)
[10] Chudnovsky E.M., Tejada J., Macroscopic Quantum Tunneling of the Magnetic Moment, (1998)

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