Polynuclear Complex Family of Cobalt(II)/Sulfonylcalixarene: One-Pot Synthesis of Cluster Salt [Co 14 II ] + [Co 4 II ] − and Field-Induced Slow Magnetic Relaxation in a Six-Coordinate Dinuclear Cobalt(II)/Sulfonylcalixarene Complex

摘要: In this paper, we report the synthesis and description of a new family polynuclear cobalt(II) complexes. Starting from same initial compounds but varying reaction time results in formation several clusters, an original structure based on [Co14][Co4] clusters was obtained, representing first one-pot cobalt aggregate salt reported literature. The magnetic properties these are discussed. Three them display binuclear molecular (1–3) with two encapsulated CoII ions show slow relaxation magnetization at small applied field (Ueff = 10.7 K for 2 Ueff 20.3 3), characteristic single-molecule-magnet materials.