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shimeng100

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In order to estimate the zero-field splitting parameter D and
g value, and confirm the spin ground state for 1, magnetization
data were collected in the ranges 0.5¨C5 Tesla and 2¨C7 K (Fig.
S1†.  The  data  were  fitted  using  the  program  MAGMOFIT.
The  best  fit  gave  a  spin  ground  state  of  S  = 4  with  g  = 2.11
and  D  = -0.41  cm -1 .  The  D  value  for  1 is  lower  than  found
in the [Ni 4 (hmp) 4 Cl 4 (ROH) 4 ] (Hhmp = 2-hydroxymethylpyridine)
cubane series (S = 4, D ª -0.6 cm -1 ).  However, differences in the D
parameter between 1 and this series will occur due to the different
Ni(II) local environment. 9 It is interesting to note that the Ni(II)
SMM with the highest recorded energy barrier (DE/k B = 14 K) is
decanuclear, with an S = 10 ground state, but a lower anisotropy
D ª -0.14 cm -1 .

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xiaoqihu

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shimeng100(½ð±Ò+25, ·­ÒëEPI+1): Ï൱²»´í 2011-10-24 13:05:43
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Á¢·½ÍéϵÁнṹ (S = 4, D ª -0.6 cm -1 ).µ«D²ÎÊýÔÚ1ºÍÕâ¸öÌåϵ½á¹¹ÖлáÓв»Í¬£¬ÕâÊÇÒòΪNi(II)Ëù´¦µÄ»·¾³»á²»Í¬¡£ÓÐȤµÄÊÇÎÒÃÇ·¢ÏÖ£¬Ni(II)
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