A novel three-dimensional manganese zinc phosphatophosphite [H2CHBMA][Zn1.5Mn(HPO3)2\5(PO4)]\5H2O(TJPU-3Mn) with extra-large twenty-membered ring channels was isolated by 1,3-cyclohexanebis(methylamine) as the template under hydrothermal conditions.Single crystal structure refinement reveals that TJPU-3Mn crystallizes in the monoclinic space group C2/c,with cell parameters,a=3.3929(7) nm,b=1.3045(3) nm,c=0.89713(18) nm,β=104.37(3)°,V=3.8465(13) nm3,Z=2.The connectivities of the ZnO4,MnO4,PO4 and HPO3 groups create a three-dimensional porous architecture with extra-large twenty-membered ring channels intersected by eight-membered rings.It is the first structure analogue to the famous aluminophsphate JDF-20.More interestingly,the diprotonated CHBMA cations in the channel are all in cis configuration,indicating the potential for separation and recognition of CHBMA isomers.Powder X-ray patterns reveal the structure of TJPU-3Mn sustains after the emission of water molecules obtained by calcining at 150 ℃ for 2 h.
