| Abstract: A one dimensional chainlike copper coordination polymer [Cu2(bza)4(btx)]n(1) (btx=1,4-bis(1,2,4-triazol-1-ylmethyl)benzene, Hbza=benzoic acid) based on binuclear copper units and the flexible bis(triazole) ligands has been synthesized and characterized by element analysis, IR spectra, single-crystal X-ray diffraction, thermal analysis, luminescent property. The crystallographic data shows that complex 1 crystallizes in triclinic space group P1 with a=1.063 70(10) nm, b=1.251 38(12) nm, c=1.530 15(14) nm, α=93.662(2)°, β=92.369(2)°, γ=104.387(2)°, V=1.965 4(3) nm3, C40H32Cu2N6O8, Mr=851.80, Dc=1.439 g·cm-3, μ(Mo Kα)=1.141 mm-1, F(000)=872, GOF=0.919, Z=2, the final R1=0.052 7 and wR2=0.095 7 for I>2σ(I). In 1, all the carboxylate ligands adopt the bidentate bridging mode binding two Cu atoms, and four bza- ligands connect the neighboring two copper ions in a chelating coordinated mode to form a binuclear copper cluster (d(Cu-Cu)=0.26 nm). Then the neighboring binuclear copper clusters are further linked by the flexible bis(triazole) ligands generating the infinite one dimensional chains. The thermal analysis illustrate that compound 1 retains a comparatively good thermal stability and the luminescent spectrum shows that complex 1 shows strong fluorescent emission with a maximum at 530 nm at λex=398 nm. CCDC: 854824. |
