Hydrothermal Synthesis,Crystal Structure and Luminescence of a Heterometallic Co Eu Coordination Polymer Based on 5-(Isonicotinamido)isophthalate

A 3d-4f coordination polymer {[CoEu2(INAIP)4(H2O)6]·2.5H2O}n(1) was obtained by hydrothermal assembly of Co(OAc)2·4H2O and Eu(NO3)3·6H2O with H2INAIP(5-(isonicotinamido)isophthalic acid).Complex 1 crystallizes in triclinic,space group P1 with a=1.008 89(13) nm,b=1.082 34(14) nm,c=2.979 5(4) nm,V=3.200(7) nm3,Z=1,C112H90Co2Eu4N16O57,Mr=3 297.70,Dc=1.711 g·cm-3,μ=2.285 mm-1,F(000)=1 636,Rint=0.025 8,R=0.049 2,wR=0.126 3.Single-crystal X-ray diffraction analysis revealed that each INAIP2-ligand uses its two carboxyl groups to connect two/three lanthanide centers,and the Co,only bonds to the pyridyl group and terminal water molecules,then forming the two-dimensional(2D) bilayer.On the other hand,the 2D layers are further connected by hydrogen bonds interactions to give a three-dimensional(3D) supramolecular structure.In addition,the luminescent property of complex 1 has been investigated at room temperature,indicating the red photoluminescence exists in it.