作者:Sonali J. Shah、Christopher M. Ramsey、Katie J. Heroux、James R. O’Brien、Antonio G. DiPasquale、Arnold L. Rheingold、Enrique del Barco、David N. Hendrickson
DOI:10.1021/ic800277j
日期:2008.7.1
frequency-dependent out-of-phase signals in the AC susceptibility measurements, collected in a temperature range of 1.8-5 K and in the frequency range of 50-10,000 Hz. Extrapolation of the in-phase component of the AC susceptibility data to 0 K indicates an S = 12 groundstate for 1 and an S = 11 ground-state for 2. Complex 1 has the highest-spin groundstate reported to date for a single-stranded manganese
两个新的单链六十二核锰车轮[Mn16(CH3COO)8(CH3CH2CH2COO)8(teaH)12] x 10 MeCN(1 x 10 MeCN)和[Mn16((CH3)2CHCOO)的合成,结构和磁性[16(teaH)12] x 4 CHCl3(2 x 4 CHCl3),其中teaH(2-)是三乙醇胺的二价阴离子。1在四边形I4(1)/ a空间组中结晶[a = b = 33.519(4)A和c = 16.659(2)A]。2在单斜C2 / c空间群中结晶[a = 21.473(5),b = 26.819(6),c = 35.186(7),β= 93.447(5)度]。两种络合物均由8个Mn(II)和8个Mn(III)离子在轮状拓扑中与12个单质子化的三乙醇胺配体交替组成。在1 T,0.1和0.01 T场中以及在1和2的1.8-300 K温度范围内收集了可变温度直流(DC)磁化率数据。在1