TY - JOUR
T1 - Syntheses, structures, and magnetism of {V15M6O 42(OH)6(Cl)} (M = Si, Ge)
AU - Gao, Yuanzhe
AU - Xu, Yanqing
AU - Li, Shan
AU - Han, Zhangang
AU - Cao, Yu
AU - Cui, Fengyun
AU - Hu, Changwen
PY - 2010
Y1 - 2010
N2 - Two [V15M6(OH)6O42(Cl)] 7- (M = Si for 1, Ge for 2) cluster anions with protonated amines as counterions have been synthesized under hydrothermal conditions and characterized by FT-IR, energy dispersive spectroscopy, XPS, powder X-ray diffraction, thermogravimetric analysis (TGA), elemental analysis, and single-crystal X-ray analyses. Both compounds consist of {V15M 6O42(OH)6(Cl)} (M = Si for 1, Ge for 2), which are derived from {V18O42} by substitution of three {VO5} square pyramids with three {Si2O5(OH) 2/Ge2O5(OH)2} units. It represents the first example of cage-like polyoxovanadates (POVs) containing three (Si/Ge)2O5(OH)2 units. There are extensive hydrogen bonding interactions between POVs and organoamines in 1 and 2. Compound 1 presents a close-packed layer aggregate, while 2 exhibits the packing of six-membered rings with a 1-D channel. Magnetism measurements demonstrate the presence of strong antiferromagnetic interaction between VIV centers in 1.
AB - Two [V15M6(OH)6O42(Cl)] 7- (M = Si for 1, Ge for 2) cluster anions with protonated amines as counterions have been synthesized under hydrothermal conditions and characterized by FT-IR, energy dispersive spectroscopy, XPS, powder X-ray diffraction, thermogravimetric analysis (TGA), elemental analysis, and single-crystal X-ray analyses. Both compounds consist of {V15M 6O42(OH)6(Cl)} (M = Si for 1, Ge for 2), which are derived from {V18O42} by substitution of three {VO5} square pyramids with three {Si2O5(OH) 2/Ge2O5(OH)2} units. It represents the first example of cage-like polyoxovanadates (POVs) containing three (Si/Ge)2O5(OH)2 units. There are extensive hydrogen bonding interactions between POVs and organoamines in 1 and 2. Compound 1 presents a close-packed layer aggregate, while 2 exhibits the packing of six-membered rings with a 1-D channel. Magnetism measurements demonstrate the presence of strong antiferromagnetic interaction between VIV centers in 1.
KW - Antiferromagnetic interaction
KW - Polyoxovanadates
KW - Vanadogermanate
KW - Vanadosilicate
UR - https://www.scopus.com/pages/publications/77956987937
U2 - 10.1080/00958972.2010.511665
DO - 10.1080/00958972.2010.511665
M3 - Article
AN - SCOPUS:77956987937
SN - 0095-8972
VL - 63
SP - 3373
EP - 3383
JO - Journal of Coordination Chemistry
JF - Journal of Coordination Chemistry
IS - 19
ER -