Synthesis , structure and properties of two novel dawson -type supramolecular compounds constructed by flexible ligands
LIU Yu-jing
YANG Meng-le
TIAN Ai-xiang
YING Jun
Abstract：Two novel flexible ligands were used to obtain two new Dawson polyoxometalates based supramo -lecular compounds, [H6(L1)3(P2W18O62)]2· 5H2O (1) and [H6(L2)3(P2W18O62)]· 3H2O (2), L1 =1,4-bis (5-(4-pyridyl) tetrazolyl)-butane, L2 =1,1-bis (3,5-dimethyl -1H-pyrazolyl) methane.The structures of compounds 1 and 2 were characterized by FTIR , elemental analysis and single -crystal X -ray diffraction.Structural analyses show that compound 1:a=42.862 ?,b=15.655 ?,c=29.881 (5) ?,α=90°,β=93.72°,γ=90 °,V=20008.3 ?3 ,Z=4,R1 =0.0565,ωR2 =0.1442.compound 2 a=15.020 ?,b=26.347 ?, c=23.177 ?,α=90°,β=106.69°,γ=90°,V=9892(4) ?3 ,Z=4,R1 =0.0486,ωR2 =0.1279.Compound 1 contained two Dawson polyoxometalates anions , the ligands surround the POMs around by the hydrogen bond . In compound 2, the ligand L2 and Dawson polyanions can lead a one -dimensional supramolecular chain struc-ture by the hydeogen -bonding interactions , and the adjacent one -dimensional supramolecular chains form a two-dimensional supramolecular layer through hydrogen bonding .We also studied the electrochemical and pho-tocatalytic properties of the two compounds .
Keywords：Dawson POMshydrothermal synthesissupramolecular structureelectrochemistryphotocata-lytic properties
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 295-302 )