Hexadecacobalt(II)‐Containing Polyoxometalate‐Based Single‐Molecule Magnet

Abstract

POMs, magnets, and Co: The tetrameric 36‐tungsto‐8‐phosphate [{Co4(OH)3PO4}4(PW9O34)4]28− containing 16 cobalt(II) centers was prepared by a simple, one‐pot synthetic procedure. The {Co16(OH)12(PO4)4}8+ core (see picture) exhibits single‐molecule magnetic behavior.

Self‐Assembly of a Giant Tetrahedral 3 d–4 f Single‐Molecule Magnet within a Polyoxometalate System

“…[17,24] In another approach, 3d-substituted Weakley-type dimers were reacted in the presence of 4f ions to substitute the labile outer M(H 2 O) groups in sandwich-type POMs,( [M 4 (H 2 O) 2 -(GeW 9 O 34 ) 2 ] nÀ ;M= Mn II ,C u II ). Thef ield of POM-based SMMs is relatively new,w ith only af ew SMMs having been reported to date, [22,[33][34][35][36][37][38][39][40][41][42][43] and the [ErW 10 O 36 ] 9À polyanion is the first example (2008) of aP OM exhibiting SMM behavior. SMMs are molecules showing slow relaxation of their magnetization below ablocking temperature (T B ).…”

Synthesis and Characterization of 8-Yttrium(III)-Containing 81-Tungsto-8-Arsenate(III), [Y8(CH3COO)(H2O)18(As2W19O68)4(W2O6)2(WO4)]43−

“…Most of the OPEN ACCESS work in this area has been focused on 3d transition metal-containing derivatives [11][12][13][14][15][16][17]. However, also the area of rare earths-containing POMs has undergone a significant expansion in recent years [18][19][20][21][22][23].…”

Hydrothermal synthesis, structure and properties of two new phosphomolybdates based on Strandberg-type {P 2 Mo 5 O 23 } 6− building units

“…Keywords: Polyoxometalate; Crystal structure; Magnetic property; Electrochemistry __________________________________________________________________________________ Polyoxometalates (POMs), as early transition metal-oxygen clusters, have been attracting an increasing attention, owing to structural and compositional diversity, and manifold potential applications in material [1], magnetism [2], catalysis [3], and photochemistry [4]. Recently, the construction of inorganic-organic hybrid compounds based on POMs building blocks and metal-organic complexes (MOCs) has been an intriguing area in this field [5].…”