Synthesis, Structure and Magnetic Properties of New Ionic Ni-Yb Nitrate Complexes with 2,2'-Bipyridine and 1,10-Phenanthroline

摘要

New heterometallic nitrate complexes, namely Ni(bipy)(3)Yb(NO3)(5)center dot 0.58MeOH (I), Ni(phen)(3)Yb(NO3)(5) (II) and Ni(phen)(3)Yb(NO3)(5)center dot MeOH (II center dot MeOH), have been prepared and studied. Anions Yb(NO3)(5)(2-) in these complexes are the first examples of homoleptic ten-coordinatied Yb complexes. The magnetic behavior of single-phase I and II has been studied in static and dynamic modes. A field-induced slowdown of magnetic relaxation, i.e., properties of single-ion magnets (SIMs), was revealed for I and II. Thus, I and II are rare examples of 3d-4f-coordination compounds possessing a discrete structure rather than a joint metal core and demonstrating a slowdown in the relaxation of magnetization. The interplay between the properties of SIM and structural features of I and II was established (CIF CCDC files no. 2103796 (I), 2103797 (II), 2103798 (II center dot MeOH)).