Syntheses,Crystal Structures and Properties of Cu(I)-Eu and Ni(II)-Eu Coordination Polymers Constructed from 5-(Isonicotinamido)isophthalic Acid

Two 3d-4f heteronuclear coordination polymers {[CuEu2(INAIP)3(HCOO)(H2O)3]·3H2O}n(1) {[NiEu2(INAIP)4(H2O)4]·4H2O}n(2) were obtained by solvothermal assembly of CuCl/NiSO4·7H2O and Eu(NO3)3·6H2O with the H2INAIP(5-(isonicotinamido)isophthalic acid) ligand.Both complex 1 and 2 crystallize in triclinic,space group P1.For 1:a=1.088 7(3) nm,b=1.515 8(4) nm,c=1.564 4(2) nm,V=2.333 2(10) nm3,Z=2,Dc=1.955 g·cm-3,μ=3.203 mm-1,F(000)=1 352,Rint=0.027,R1=0.050 5,wR2=0.130 9.a=1.013 4(3) nm,b=1.083 6(6) nm,c=1.374 1(2)nm,V=1.453 0(9) nm3,Z=1,Dc=1.878 g·cm-3,μ=2.554 mm-1,F(000)=818,Rint=0.045 8,R1=0.034 1,wR2=0.086 9for 2.Single-crystal X-ray diffraction analysis revealed that each INAIP2-ligand uses its two carboxyl groups to connect two or three Eu(Ⅲ) ions into 2D lanthanide bi-layer structure.Then the 2D layers are further connected by pyridyl groups to give a three-dimensional two-fold interpenetrated pillared-layer structure in 1 with sqc27 topology.While in complex 2,the Ni(Ⅱ) bonds to the pyridyl group(N) and carboxylate group(O) linking the 2D lanthanide layer into a 3D framework.In addition,the luminescent properties of complexes 1 and 2 have been investigated,which showed the obviously red photoluminescence in them.CCDC:943863,1;966618,2.