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A Keggin‐Type Structure Expanded by an Eight‐Membered Ring of Alternating Edge‐Sharing VO 5 and VO 6 Polyhedra: Solvothermal Synthesis, Crystal Structure, and Magnetic Properties
Author(s) -
Rasmussen Maren,
Näther Christian,
van Leusen Jan,
Kögerler Paul,
Bensch Wolfgang
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201500286
Subject(s) - chemistry , antiferromagnetism , delocalized electron , crystallography , octahedron , ring (chemistry) , cluster (spacecraft) , crystal structure , solvothermal synthesis , polyhedron , spins , magnetic susceptibility , condensed matter physics , physics , geometry , mathematics , organic chemistry , computer science , programming language
The new tungstovanadate (trenH) 2 (trenH 2 ) 2 [W 4 V 13 O 44 ] · ca.11H 2 O was prepared under solvothermal conditions in a basic solution at pH ≈ 12. The cluster core contains V IV /V V centers with delocalized spins exhibiting strong antiferromagnetic exchange interactions as evidenced by temperature‐dependent magnetic susceptibility measurements pointing to an S = 1/2 magnetic ground state. The structure features an eight‐membered ring composed of four alternating edge‐sharing VO 5 pyramids and VO 6 octahedra encapsulating a central Keggin fragment.