Two new compounds(1 and 2)based on indole were successfully synthesized and characterized.They display highly selective response to Fàin aqueous DMSO medium and pure DMSO with remarkable color and fluorescent changes.Therefore,both receptors may serve as colorimetric sensors for Fàby visual detection.
Xiu-Ming LiuQiang ZhaoYue LiWei-Chao SongYa-Ping LiZe ChangXian-He Bu
Three new Cu(Ⅱ)-Ln(Ⅲ) heterometallic coordination polymers based on two N-heterocyclic carboxylic ligands, {[LnCu(L1)2(L2)(H2O)2]·mH2O}n (Ln = La(1), Nd(2), Gd(3), m = 2 (for 1), 1 (for 2, 3), H2L1 = quinolinic acid, HL2 = nicotinic acid), have been synthesized and characterized. 1 has a two-dimensional (2D) layer structure with a Schlfli symbol of (44.62), while complexes 2 and 3 are isostructural and have three-dimensional (3D) structures with a Schlfli symbol of (3.4.5)2(32.42.52.614.74.83.9)(32.63.7) of 3-nodal net. Magnetic investigations suggest that antiferromagnetic coupling exists between NdIII and CuII in 2, while weak ferromagnetic coupling between GdIII and CuII in 3. The difference of magnetic properties between 2 and 3 has been discussed.
LIU SuiJun SONG WeiChao XUE Li HAN SongDe ZENG YongFei WANG LiFu BU XianHe
Two new Cu(Ⅱ) coordination polymers,[Cu(FDA)(BPY)(H2O)]n(1) and {[Cu(FDA)(BPY)(H2O)]·2H2O}n(2)(H2FDA = 2,5-furandicarboxylic acid,BPY = 2,2-bipyridine),have been synthesized and structurally characterized by single-crystal X-ray diffraction as well as elemental analysis and IR.Compound 1 crystallizes in monoclinic,space group P21/c,with a = 7.5915(15),b = 8.4050(17),c = 24.204(6) ,β = 99.05(3)°,V = 1525.1(6) 3,Dc = 1.706 g/cm3,C16H12CuN2O6,Mr = 391.82,F(000) = 796,μ(MoKα) = 1.470 mm–1,Z = 4,R = 0.0633 and wR = 0.1059 for 2389 observed reflections(I > 2σ(I)),R = 0.0738,and wR = 0.1098 for all data.Complex 2 belongs to triclinic space group P1 with a = 8.8660(18),b = 8.9112(18),c = 12.525(3) ,α = 88.41(3),β = 69.38(3),γ = 66.95(3)°,V = 845.2(3) 3,Dc = 1.681 g/cm3,C16H16CuN2O8,Mr = 427.85,F(000) = 438,μ(MoKα) = 1.342 mm–1,Z = 2,R = 0.0290 and wR = 0.0690 for 2767 observed reflections(I > 2σ(I)),R = 0.0329 and wR = 0.0706 for all data.Complexes 1 and 2 are both coordination polymers with one-dimensional chain structures bridged by the protonated FDA ligands,which are assembled into three-dimensional supramolecular structures through hydrogen bonding interactions and π-π packing interactions between the chains.
Three new cobalt complexes,{[Co5(tci)2(bimb)3(3-O)2(H2O)2]·3DMF·4H2O}n(1),{[Co3(tci)2(bib)]·2DMF·2H2O}n(2)and{[Co(Htci)(bpea)0.5]·H2O}n(3)(H3tci=tris(2-carboxyethyl)isocyanurate,bimb=4,4′-bis(imidazol-1-yl)biphenyl,bib=1,4-bis(imidazol-1-yl)benzene,bpea=1,2-bis(4-pyridyl)ethane,DMF=N,N′-dimethylformamide),have been successfully synthesized through the assembly of Co(II)ions,H3tci and different N-donor ligands,respectively.All complexes were structurally characterized by single crystal X-ray diffraction,elemental analyses,IR spectra,thermogravimetric(TG)analyses and X-ray powder diffraction(XRPD).Complex 1 exhibits a 3D three-fold parallel interpenetrated 3D→3D structure with(65·8)CdSO4topology.Complex 2 is built from[Co3(2-Ocarboxyl)2(CO2)4]clusters and linear bib ligands,displaying a two-fold parallel interpenetrated(3,8)-connected(43)2(46·618·84)topology,while complex 3 is a 3D pillar-layered structure involving an infinite–Co–(2-Ocarboxyl)(CO2)–Co–chain.The diverse structures of the three complexes indicate that the skeletons of different N-donor ligands play an important role in the assembly of such different frameworks.In addition,magnetic investigation indicates that besides spin-orbit coupling of Co(II)ions,there exist antiferromagnetic exchange interactions in Co5and Co3clusters of 1 and 2,respectively.
