An open chain carboxyethyltin functionalized sandwich-type tungstophosphate based on a trivacant Dawson subunit: synthesis, characterization and properties.
A Dawson sandwich-type polyoxometalate {C(NH2)3}12H4[αββα-{(Sn(C3H4O2))2Mn2(P2W15O56)2}]·22H2O (abbreviated as SnR-Mn-P2W15), functionalized by open chain carboxyethyltin groups, was first prepared in aqueous solution under conventional reaction conditions, and then structurally characterized by physicochemical and spectroscopic methods. Single crystal X-ray diffraction analysis revealed that two Mn(2+) cations and two [Sn(CH2CH2COO)](2+) groups are located in the internal and external positions in the so-called equatorial region of SnR-Mn-P2W15, respectively. Intriguingly, two exposed carboxyl groups act as stretching-arm brackets, which provide a favorable structure for potential further functionalization. The electrocatalytic activity of SnR-Mn-P2W15 towards the reduction of hydrogen peroxide and nitrite was studied. Additionally, its acid catalysis and oxidation catalysis activities in organic synthesis were investigated.
School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China. zhanglancui@lnnu.edu.cn wsyou@lnnu.edu.cn chemzhu@sina.com.
Jian-Ping
JP
Bai
Fang
F
Su
Hao-Tian
HT
Zhu
Hang
H
Sun
Lan-Cui
LC
Zhang
Mei-Ying
MY
Liu
Wan-Sheng
WS
You
Zai-Ming
ZM
Zhu
D002384:Catalysis; D060326:Chemistry Techniques, Synthetic; D003511:Cyclohexanols / Q000737:chemistry; D003512:Cyclohexanones / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D009573:Nitrites / Q000737:chemistry; D010084:Oxidation-Reduction; D017973:Tungsten Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D000099294:Polyoxometalates
D003511:Cyclohexanols; D003512:Cyclohexanones; D006861:Hydrogen Peroxide; D009573:Nitrites; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates; C036468:cyclohexanone