| A series of coordination polymers(CPs)with intriguing structures and excellent luminescent properties constructed from three novel carboxylate-functionalized resorcin[4]arene ligands and metal ions have been synthesized under solvothermal conditions and characterized by the single crystal X-ray diffraction,infrared spectra(IR),powder X-ray diffraction spectra(PXRD),elemental analyses and thermogravimetric analysis(TGA).In addition,luminescent detection of small molecules,volatile aldehyde and amine vapors,and tunable luminescence properties of some compounds were also studied.1.Four novel coordination polymers,[(CH3)2NH2][Zn3(HL1)(H2O)2]·4H2O(1),[Co4(L1)(DMF)2(H2O)8]·6H2O(2),[Ni4(L1)(DMF)2(H2O)8]·6H2O(3)and [(CH3)2NH2][Mn3(HL1)(DMF)(H2O)6]·8H2O(4)(H8L1 = 2,8,14,20-tetra-methyl-4,6,10,12,16,18,22,24-octa-carboxymethoxy-resorcin[4]arene and DMF = N,N’-dimethylformamide)have been synthesized.Their tructures have been confirmed and further characterized by relative physical methods.Compound 1 reveals a two-dimensional(2D)double layer.Compounds 2 and 3 are isomorphous,and demonstrate identical three-dimensional(3D)(3,6)-connecting nets with(42·6)(44·62·88·10)topologies.Compound 4 features a 3D inodal 5-connected(46·64)(46·64)framework.The UV-vis spectra of Compounds 1-4 have been explored.The solid-state luminescence of compound 1 and its fluorescence property in various suspensions has been investigated at room temperature.Moreover,the luminescence sensing properties of compound 1 for nitroaromatic compounds have also been studied in detail.2.By utilizing a new chair-conformation octacarboxylate-functionalized resorcin[4]arene ligand,four functional metal-organic frameworks(MOFs),namely,[(CH3)2NH2]4[Cd2(L2)]·4H2O(5),[(CH3)2NH2]4[Zn2(L2)]·2DMF·6H2O(6),[(CH3)2NH2]4[Co2(L2)]·2DMF·4H2O(7)and [(CH3)2NH2]2[Co3(L2)(H2O)12](8)(H8L2 = 2,8,14,20-tetra-benzyl-4,6,10,12,16,18,22,24-octa-carboxymethoxy-resorcin[4]arene and DMF = N,N’-dimethylformamide)were solvothermally synthesized and structurally characterized.In compound 5,each L28-anion bridges eight Cd(II)ions to give a 3D(4,8)-connected(46)(412·610·86)framework.In isostructural compounds 6 and 7,each L28-anion links eight adjacent Zn(II)or Co(II)ions to yield a 3D(4,8)-connected(46)(411·612·85)net.In compound 8,each L28-anion only bridges four Co(II)ions by using its four carboxylates each in a monodentate coordination mode to generate an infinite one-dimensional(1D)chain.Remarkably,the highly selective luminescent sensing of amine and aldehyde vapors was studied for activated compounds 5 and 6 as fluorescent sensors.In addition,the magnetic properties of compounds 7 and 8 were also briefly investigated.3.A series of lanthanide–metal organic frameworks(Ln-MOFs),namely,[Ln2(H2L3)(DMF)2(H2O)2]·4H2O(Ln = Tb(9),Eu(10)and Gd(11),H8L3 = 2,8,14,20-tetra-phenyl-4,6,10,12,16,18,22,24-octa-carboxymethoxy-resorcin[4]arene)have been solvothermally synthesized.Codoped Eu/Tb-MOFs [Eu2xTb2(1-x)(H2L3)(DMF)2(H2O)2]·4H2O [x = 0.061(12),0.086(13),0.141(14),0.170(15),0.228(16),0.244(17),0.281(18),0.324(19)and 0.510(20)] were synthesized by varying the Eu3+:Tb3+ stoichiometry.Isostructural compounds 9-11 display 3D 6-connected network with a(412·63)topology.Compounds 9 and 10 produce intensive green and red emissions respectively thanks to the antenna effect of H2L36-anions.Remarkably,with careful adjustment of the relative concentration of the lanthanide ions,the luminescent color of codoped compounds 12-20 can be gradually modulated from green to red.In addition,the effects of different excitation wavelengths on the emission color of compounds 12 and 20 were also briefly investigated. |
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