A rare 3D porous chiral polyoxoniobate framework,[Cu(en)_(2)(H_(2)O)]_(2){[Cu(en)]_(4)[Cu(en)_(2)]_(5){[Cu(en)_(2)KNb_(24)O_(72)H_(10)]_(2)}·6en·70H_(2O)(1)(en=ethylenediamine)based on two types of isomeric{...A rare 3D porous chiral polyoxoniobate framework,[Cu(en)_(2)(H_(2)O)]_(2){[Cu(en)]_(4)[Cu(en)_(2)]_(5){[Cu(en)_(2)KNb_(24)O_(72)H_(10)]_(2)}·6en·70H_(2O)(1)(en=ethylenediamine)based on two types of isomeric{Cu(en)_(2)KNb_(24)O_(72)H10}clusters(α-CuKNb_(24)andβ-CuKNb_(24))has been synthesized by a hydrothermal reaction.Interestingly,theα-CuKNb_(24)andβ-CuKNb_(24)clusters are connected by cupric complexes to form chiral helical pillars with left-handedness(L-α-CuKNb_(24))and right-handedness(R-β-CuKNb_(24)).To our knowl edge,compound 1 is thefirst polyoxometalate-based MOF with a 4-connected neb-type topology struc ture within polyoxometalate chemistry.This compound also exhibits proton conduction and strong water vapor adsorption properties.展开更多
基金support from the National Natural Science Foundation of China(No.21971039,21971040 and 21773029)the Natural Science Fund of Fujian Province(No.2017J01579).
文摘A rare 3D porous chiral polyoxoniobate framework,[Cu(en)_(2)(H_(2)O)]_(2){[Cu(en)]_(4)[Cu(en)_(2)]_(5){[Cu(en)_(2)KNb_(24)O_(72)H_(10)]_(2)}·6en·70H_(2O)(1)(en=ethylenediamine)based on two types of isomeric{Cu(en)_(2)KNb_(24)O_(72)H10}clusters(α-CuKNb_(24)andβ-CuKNb_(24))has been synthesized by a hydrothermal reaction.Interestingly,theα-CuKNb_(24)andβ-CuKNb_(24)clusters are connected by cupric complexes to form chiral helical pillars with left-handedness(L-α-CuKNb_(24))and right-handedness(R-β-CuKNb_(24)).To our knowl edge,compound 1 is thefirst polyoxometalate-based MOF with a 4-connected neb-type topology struc ture within polyoxometalate chemistry.This compound also exhibits proton conduction and strong water vapor adsorption properties.
