Family of heterometallic semicircular Mn(III)2Ln(III)3 strands.
A series of heterometallic complexes of formula [Mn(III)(2)Ln(III)(3)(bdeaH)(3)(bdea)(2)(piv)(8)] x MeCN, where bdeaH(2) = N-butyldiethanolamine, piv = pivalate, and Ln = Y (1), Tb (2), Dy (3), Ho (4), and Er (5), has been prepared. 1-5 are isostructural, with the metal centers forming a novel semicircular Ln(III)-Mn(III)-Ln(III)-Mn(III)-Ln(III) strand. Only 2 and 3 exhibit slow relaxation of the magnetization, suggesting that the highly anisotropic Ln(III) ions (Tb(III) and Dy(III)) are essential for an energy barrier to spin reversal.
Akhtar
Muhammad Nadeem
MN
Institut für Anorganische Chemie der Universität Karlsruhe (TH), Karlsruhe Institute of Technology, Engesserstrasse 15, 76131 Karlsruhe, Germany.
Zheng
Yan-Zhen
YZ
Lan
Yanhua
Y
Mereacre
Valeriu
V
Anson
Christopher E
CE
Powell
Annie K
AK