Abstract / Description of output
The synthesis and structural characterization of the two new Mn complexes [Mn18O14(O2CMe)(18)(heP)(4)(hepH)(2)(H2O)(2)](ClO4)(2) (1) and [Mn21O16(O2CMe)(16)(hmp)(6)(hmpH)(2)(pic)(2)(py)(H2O)](ClO4)(4) (3) are presented, together with a detailed study of their magnetic properties. Complex 1 possesses a ground-state spin of S = 13, and the ground-state spin for 3 is estimated to be S = 17/2 or 19/2. Both complexes 1 and 3 are new examples of single-molecule magnets (SMMs), displaying frequency-dependent out-of-phase AC signals, as well as magnetization vs. DC field hysteresis at temperatures below 1 K. Complex 1 straddles the classical/quantum interface by also displaying quantum tunneling of the magnetization (QTM). (C) 2003 Elsevier Science Ltd. All rights reserved.
Keywords / Materials (for Non-textual outputs)
- Mn clusters
- quantum tunneling
- single-molecule magnets
- HIGH-SPIN MOLECULES