A 3-D Supramolecular Network with 1-D Cation Metal-organic Coordination Polymers and Diverse Motifs from Hydrogen-bonded [M(H_2O)_4]-Carboxylates

One-pot solvothermal reaction of Iransition metal Znn salt with 4,4-bipyddyl （bpy） and 1,4-benzenediacrylic add （H2L） in the presence of Et3N generates a three-dimensional （3-D） supramolecular network with 1-D cation metal-organic coordination polymer, [Zn（H20）a（bpy）]-L 1, and structurally characterized by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy, and photoluminescent property. The complex crystallizes in triclinic, space group P1 with a = 7.1291（2）, b = 7.3784（3）, c = 10.5042（3）A, α = 95.049（2）, β = 102.162（2）, 7 = 97.027（3）0, V= 532.38（3）A3, C22H24N2O8Zn, Mr = 509.82, De= 1.590 g/cm3, p（MoKa）= 1.207 ram-l, F（000） = 264, Z = 1,the finalR=O.0438and wR=O.lOll for 1589 observed reflections （I 〉 2σ（I））. In the crystal structure, the second building unit composed of [Zn（H2O）4].L constructs two distinct 2-D supramolecular sheets and a neutral 3-D architecture. The title compound 1 shows strong photoluminescence with emission maximum at 2 = 455 nm upon λex.max = 355 nm.

Two Metal-organic Coordination Polymers with Rigid Bis(triazole) Ligand： Assembly, Structures, and Fluorescence Properties

Two new coordination polymers containing rigid bis（triazole）, namely, [Ni（btb）_（0.5）（nph）（H_2O）]_n（1） and [Zn（btb）（SO_4）]_n（2）（btb = 4,4a-bis（1,2,4-triazolyl-1-yl）-biphenyl, H_2nph = 3-nitrophthalic acid） have been synthesized and characterized by elemental analysis, IR spectra, and single-crystal X-ray diffraction. Complex 1 shows a 3D trinodal（3,4,4）-connected sqc69 topology. Complex 2 presents a 2D uninodal 4-connected sql network, which is further packed into a 3D supramolecular framework by C-H···O hydrogen bonds. Thermal stabilities and fluorescence properties of two complexes have been discussed in detail.

Two Novel Cobalt(Ⅱ)/nickel(Ⅱ) Metal-organic Coordination Polymers Based on Flexible Polycarboxylic Acids and Rigid Bis(imidazole) Mix Ligands

Two novel metal-organic coordination compounds, [Co2(OH)(chdc)1.5(bibp)]n(1) and [Ni(chdc)(bib)]n·2nH2O(2, H2chdc=1,4-cyclohexanedicarboxylic acid, bibp=4,4’-bis(1-imidazolyl)biphenyl, bib=1,4-bis(1-imidazolyl)benzene), were synthesized and characterized. Compound 1 crystallizes in monoclinic system, space group PI with a=10.591(3), b=11.146(3), c=12.264(3) ?, α=89.009(6), β=88.397(4), γ=87.823(3)°, V=1446.0(6) ?3, Dc=1.554 g/cm3, C30H30Co2N4O7, Mr=676.44, F(000)=696, μ(MoKα)=1.202 mm-1, Z=2, R=0.0278 and wR=0.0718. In 1, it contains an interesting tetranuclear Co(Ⅱ) cluster. The neighboring {Co4} clusters are linked by chdc2-ligands to generate a 2D network. The bibp ligands connect adjacent layers to form an open 3 D metal-organic framework. Compound 2 crystallizes in monoclinic system, space group P21/n with a=8.8110(1), b=19.369(1), c=12.7379(4) ?, β=102.952(5)o, V=2118.5(2) ?3, Dc=1.490 g/cm3, C20H24N4NiO6, Mr=475.14, F(000)=992, μ(MoKα)=0.961 mm-1, Z=4, R=0.0306 and wR=0.0738. In 2, each deprotonated chdc 2-ligand links two Ni(Ⅱ) atoms to generate a 1 D chain along the a axis. The adjacent chains are further connected by bib ligands to build up an interesting two-dimensional network. Compound 1 shows antiferromagnetic property.

Synthesis of energetic coordination polymers based on 4-nitropyrazole by solid-melt crystallization in non-ionization condition

Based on the theory of crystallization,a solvent-free solid-liquid phase crystallization method called solid-melt crystallization was designed to prepare energetic coordination polymers.Two target compounds[Cu(NPyz)_(4)NO_(3)]·NO_(3)(ECPs-1)and Cu(NPyz)_(4)(ClO_(4))_(2)(ECCs-2)were prepared through programmed heating and cooling by using 4-nitropyrazole(NPyz),(Cu(NO_(3))_(2)·5H_(2)O and Cu(ClO_(4))_(2)·5H_(2)O) as raw materials.In addition,crystallization pre-experiments and annealing experiments also verified the feasibility of the method.Their structures were confirmed by IR,elemental analysis,single-crystal X-ray diffraction and powder X-ray diffraction.The physicochemical properties and sensitivity test results showed that ECCs-2 has better thermal stability(T_(d)=221℃),while ECPs-1 is less sensitive to mechanical stimuli(IS=12 J,FS=240 N).Calculations based on EXPLO5 and the Kamlet-Jacobs equation showed that ECCs-2 has more considerable detonation performance(P=25.2 GPa,D=7.5 km/s).In comparison,the more intuitive results from the HN test,flame test,thermal resistance test and lead plate explosion test revealed that ECCs-2 has an“acceptable”detonation performance.The laser detonation test also showed that ECCs-2 is a promising excellent laser detonation material(E=408 mJ,P=24 W,τ=17 ms).

Encapsulation of lipases on coordination polymers and their catalytic performance in glycerolysis and esterification

In this study,lipases of CALB(Candida antarctica lipase B),TLL(Thermomyces lanuginosa lipase),RML(Rhizomucor miehei lipase),CALA(Candida antarctica lipase A)and LU(Lecitase?Ultra)were encapsulated into the nucleotidehybrid metal coordination polymers(CPs)for diacylglyerols(DAG)preparation.Guanosine 5'-monophosphate(GMP)and adenosine 5'-monophosphate(AMP)were used as coordinating molecules,and metal ions of Fe^(3+),Ba^(2+),Mn^(2+),Ni^(2+)and Cr^(3+)were applied to prepare matrix.Results indicated that,besides Ba^(2+)with AMP,all other metal ions can coordinate with AMP and GMP to generate CPs.In addition,the AMP/Ni was amorphous when standing temperature was 4℃,while it was crystalline when standing temperature was from 30 to 180℃.DAG content from 47.55%to 64.99%was obtained from glycerolysis by CALB@GMP/Ba,RML@GMP/Ba,TLL@GMP/Ba,RML@GMP/Mn and TLL@GMP/Mn.Additionally,CALB@GMP/Fe showed selectivity towards DAG formation in the esterification and DAG content up to 61.88%was obtained.

Rare π_5~6…Pb Interactions in a Two-dimensional Metal-organic Coordination Polymer with Two Distinct Kinds of Axially Chiral Units

A new metal-organic coordination polymer [Pb（mfpdc）（CH3OH）]n （1, mfpdc = 2,6-dimethyl-4-（2-furanyl） pyridine-3,5-dicarboxylate） was synthesized and characterized by single-crystal X-ray analyses. The crystal is orthorhombic, space group Pbca, a = 15.6297（18）, b = 9.4803（11）, c = 18.598（2） A, V= 2755.8（6） A3, Z = 8, Mr= 498.44, Dc= 2.403 Mg/m3, F（000） = 1872, the final R = 0.0275 and wR = 0.0726 （1 〉 2σ（I））. There are interesting polynuclear zigzag （PbOs）n chains in the structure of 1, and there have interesting axially chiral S- and R-unit Pb4L units constructed from prochiral organic ligands through C-H...O bonding. The （R/S）-Pb4L units by sharing Pb centers generate a 2-D coordination network, in which there exist rare n65Pb （3.2610 A） interactions. The solid-state photoluminescent emission of compound 1 appears at 487 nm.

Combination of Nitrogen-Rich Skeleton and Coordination Group:Synthesis of a High-Energy Primary Explosive Based on 1H-Tetrazole-5-Carbohydrazide

The high energy coordination compounds Cu(TZCA)_(2)(ClO_(4))_(2)(ECCs-1) was prepared by 1H-tetrazole-5-carbohydrazide(TZCA) with a high energy skeleton and a strong coordination ability group.At the same time,the reaction activity of the ligand was explored,and the single crystal structure of it and intermediate were obtained.The structures of all substances were characterized by IR and EA.And the structure and composition of ECCs-1 are confirmed by ESP,AC,SEM and ICP-OES.Physical and chemical properties tests show that ECCs-1 has an acceptable thermal stability(T_(d)=177℃) and extremely sensitive mechanical stimulation(IS=1 J,FS=5 N).The comprehensive performance test results show that ECCs-1 has excellent initiation ability.In addition,the decomposition mechanism of ECCs-1 is explored from two aspects of experiment and theoretical calculation.

Two Isostructural 2-D Metal(Ⅱ)-organic Coordination Polymers from 4,4'-Bipyridyl and (E)-2,6-Dimethyl-4-styrylpyridine-3,5-dicarboxylic Acid

（E）-2,6-Dimethyl-4-styrylpyridine-3,5-dicarboxylic acid （H2mspda） is firstly employed in coordination chemistry.Two isostructural two-dimensional （2-D） 4-connected metal-organic coordination polymers with a general formula of {M2[（mspda）2（bpy）（H2O）2]}n （M=Zn（1） and Co（2）） are assembled from H2mspda,4,4＇-bipyridyl （bpy）,zinc and cobalt ions under hydrothermal conditions,and characterized by single-crystal X-ray diffraction analyses.Complex 1 crystallizes in monoclinic,space group P21/n with a=14.551（4）,b=10.941（3）,c=14.945（4）,β=98.817（4）o,V=2351.3（1）3,Dc=1.511 g/cm3,μ（MoKα）=1.090 mm-1,F（000）=1104,Z=4,the final R=0.0335 and wR=0.0485 for 3296 observed reflections （I 〉 2σ（I））.In compound 1,mspda2-spacers are only arrayed in a head-to-tail fashion which corresponds to a 2-D coordination polymer.Solid-state H2mspda and complex 1 have expected photoluminescence （λem=475～496 nm） at room temperature.

Recent Advances of Lanthanide-transition Heterometallic Coordination Polymers

With the improvement of high-tech and emergence of crossing and new fields, lanthanide-transition （Ln-M） heterometallic coordination polymers have attracted much attention of many researchers, which exhibit novel structures and unique properties with potential applications in the nonlinear optical materials, fluorescent materials, superconducting materials, magnetic materials, catalysis, bio-simulation, adsorption and separation, and so on. It is thus necessary to summarize Ln-M heterometallic coordination polymers. According to the transition metal ions, those coordination polymers are divided into six parts to explore the current applications and future developments.

Efficient catalytic conversion of carbohydrates into 5-ethoxymethylfurfural over MIL-101-based sulfated porous coordination polymers

In this work, a series of MIL-101-SO3H（x） polymeric materials were prepared and further used for the first time as efficient heterogeneous catalysts for the conversion of fructose-based carbohydrates into 5-ethoxymethylfurfural（EMF） in a renewable mixed solvent system consisting of ethanol and tetrahydrofuran（THF）. The influence of –SO3H content on the acidity as well as on the catalytic activity of the porous coordination polymers in EMF production was also studied. High EMF yields of 67.7% and 54.2% could be successively obtained from fructose and inulin in the presence of MIL-101-SO;H（100） at 130 °C for 15 h.The catalyst could be reused for five times without significant loss of its activity and the recovery process was facile and simple. This work provides a new platform by application of porous coordination polymers（PCPs） for the production of the potential liquid fuel molecule EMF from biomass in a sustainable solvent system.

Syntheses, Crystal Structures and Magnetic Properties of Ni(Ⅱ) and Mn(Ⅱ) Coordination Polymers Constructed from 5-(2'-Carboxylphenyl) Nicotate and 2,2'-Biimidazole

Two coordination polymers, namely {[Ni（cpna）（H2biim）（H2O）]·H2O}n （1） and {[Mn（cpna）（H2biim）]·H2O}n （2） （H2cpna = 5-（2＇-carboxylphenyl） nicotic acid, H2biim = 2,2＇- biimidazole）,have been hydrothermally synthesized and characterized by elemental analysis, IR, TG, magnetic properties, and single-crystal X-ray diffraction. Compound 1 exhibits a one- dimensional （1D） step-like chain structure, which further builds a three-dimensional （3D） supramolecular architecture via O–HAAAO and N–HAAAO hydrogen-bonding and π-π stacking interactions. Compound 2 possesses a one-dimensional （1D） double chain structure, which is further assembled into a 3D supramolecular framework by N–HAAAO hydrogen bonding and π-π stacking interactions. Magnetic susceptibility measurement indicates that compound 1 shows a weak antiferromagnetic coupling between the nearest Ni（II） centers, with g = 2.11 and J = –1.87 cm^-1.

Two Preparation Methods-dominated Cd^(Ⅱ)-Based Coordination Polymers with Mixed Adenine Nucleobase and 5-Nitroisophathalate Ligands: Synthesis, Structure and Fluorescence

Two new CdⅡ-based coordination polymers(CPs) with mixed adenine(Hade) nucleobase and 5-nitroisophathalate(nip) ligands, {[Cd(Hade)_(0.5)(H_2O)_2(nip)]·H_2O}n 1 and {[Cd(Hade)(H_2O)_(1.25)(CH_3OH)0.75(nip)]·0.75 CH_3OH·0.5H_2 O}_n 2, were successfully obtained by varying the preparation methods and structurally characterized. Crystal data for 1: monoclinic, C2/c space group with a = 10.5546(6), b = 17.3496(6), c = 16.1198(9) ?, β = 104.2800(10)o, V = 2860.6(2) ?3, Dc = 2.058 g/cm^3, Mr = 443.13, Z = 8, F(000) = 1752, μ = 1.585 mm^(–1), the final R = 0.0394 and wR = 0.1109 for 2285 observed reflections with I > 2σ(I). For 2: triclinic, P1 space group with a = 10.2032(7), b = 10.5098(8), c = 11.0223(8) ?, a = 65.7050(10)o, β = 74.5750(10)o, g = 61.5280(10)o, V = 943.38(12) ?~3, Dc = 1.888 g/cm3, Mr = 536.24, Z = 2, F(000) = 537, μ = 1.225 mm^(–1), the final R = 0.0225 and wR = 0.0702 for 3143 observed reflections with I > 2σ(I). 1 presents a crisscrossed layer with mutually orthogonal {Cd(nip)} chains aggregated by neutral m-N(7),N(9)-Hade connector. By contrast, 2 displays a linear chain with CdⅡ ions extended by bis-bidentate chelating-nip2–connectors, which are further assembled into a broad ribbon by N-H···N hydrogen-bonding interactions. Additionally, the two solid-state samples with comparable thermal stability exhibit favorable luminescent emissions at room temperature, suggesting their potential applications as fluorescence materials.

Temperature-controlled Hydrothermal Synthesis of Copper(Ⅰ or Ⅱ) Coordination Polymers via a Variety of Copper Coordination Modes

Two 1D coordination polymers Cu2I（C6N3H4）2（1） and CuⅡ（C6N3H4）2·H2O（2） based on benzotriazole（Bta） were hydrothermally synthesized by controlling the crystallization temperature.Single-crystal X-ray diffraction（XRD） analyses reveal that compound 1 is a 1D tubular structure constructed from two types of 1D chains {―Cu―N=N―N―} n,where the Cu（I） ions adopt linear,triangular,and tetrahedral coordination modes to connect two types of Bta ligands via π-π interaction inside the tubular-like chain.For compound 2,the Cu（Ⅱ） ions assume a quadrilateral coordination mode linking to the Bta ligands to give 1D straight chains,which stacks through π-π interactions to construct a 2D layer structure.Further characterizations including elemental analyses,infrared IR spectra,thermogravimetric（TG） analyses and luminescence properties have been done.

Metal-directed Assembly of Two Distinct Coordination Polymers with 2,5-Furandicarboxylic Acid and 4,4'-Bipyridine

By using solvothermal method, two new metal coordination polymers based on 2,5-furandicarboxylic acid（H2FDA） ligand and 4,4＇-bipyridine（bipy）, [Cu（FDA）（4,4＇-bipy）（DMF）]n·solvent（1） and {[Zn（4,4＇-bipy）（FDA）（DMF）]·DMF}n（2）, were produced and characterized by single-crystal X-ray diffraction analyses, elemental analyses, IR and powder X-ray diffraction. Compound 1 crystallizes in monoclinic space group P21/c with a = 11.104（2）, b = 10.396（2）, c = 18.772（4） , β = 96.20（3）o, V = 2154.2（7） 3, Dc = 1.378 g/cm^3, C19H17 Cu N3O6, Mr = 446.90, F（000） = 916, μ（Mo Kα） = 1.05 mm^-1, Z = 4, R = 0.0691 and wR = 0.1341 for 3537 observed reflections（I 2σ（I））, and R = 0.1062 and w R = 0.1482 for all data. Compound 2 crystallizes in monoclinic space group C2/c with a = 29.779（6）, b = 9.6417（19）, c = 17.292（3）, β = 105.69（3）°, V = 4779.9（16） 3, Dc = 1.445 g/cm^3, C22H22N4O7 Zn, Mr = 519.81, F（000） = 2144, μ（Mo Kα）= 1.08 mm^-1, Z = 8, R = 0.0641 and w R = 0.1007 for 2985 observed reflections（I 2σ（I））, and R = 0.1028 and w R = 0.1112 for all data. Different coordination geometry of metal ions, square pyramid of Cu2＋ and trigonal bipyramid of Zn2＋, bring about different orientations of FDA2- ligands as well as 4,4＇-bipyridine ligands, and furthermore distinct assembly structures for 1 and 2. The thermal stabilities of 1 and 2 are also investigated.

Syntheses, Structures and Photoluminescence of Two New Europium（III） Coordination Polymers

Two new europium （Ⅲ） coordination polymers formulated as Eu2（H20）a（ox）4]· （CsH6N）2-2H20 （1） and Eu2（ad）3（H20）4]＇0.25H20 （2） （H20x = oxalic acid, H2ad = adipic acid） have been synthesized from the self-assembly of lanthanide ions Eu^3＋ with flexible oxalic and adipic acid ligands, respectively. Structural analyses revealed that complex 1 exhibits three-dimensional metalorganic frameworks, and 2 has intricate two-dimensional interpenetrated metal-organic networks. In addition, the photoluminescent properties of complexes 1 and 2 were discussed in detail, which shows strong red emission, corresponding to ^5Do →^7F？ transition of Eu^3＋ ions.

1D Lanthanide Coordination Polymers Based on 3-(Pyridin-4-yl)benzoic Acid: Syntheses, Structures and Luminescent Properties

ABSTRACT Four novel 1D lanthanide coordination polymers with formula [Ln（3,4-pybz）3（HzO）2. H2O]n （Ln = 1 Sm; 2 Eu; 3 Tb; 4 Dy, 3,4-Hpybz = 3-（pyridin-4-yl）benzoic acid） have been synthesized by hydrothermal reactions of lanthanide oxide and 3-（pyridine-4-yl） benzoic acid. Single-crystal X-ray diffraction shows that the four compounds are isostructural. They all crystallize in a monoelinic system, space group P1^-. They have a doubly carboxylate-bridged infinite-chain structure with alternating Ln-（carboxylate）2-Ln linkages and one chelating carboxylate group on each metal center. The Ln ion also combines to two water molecules to form an eight-coordinate square antiprismatic geometry. The pyridine nitrogen atoms of the ligand do not coordinate to the metal centers but direct the formation of a 3D network through hydrogen bonding with coordinated water molecules. The photoluminescent properties of 2 and 3 have been also studied.

Synthesis, Structure and Luminescent Properties of Cd(Ⅱ) Coordination Polymers Based on 4-Nitrobenzoic Acid and Bis(imidazol) Ligand

A new Cd（II） coordination polymer, [Cd05（nba）（bib）0.5]2n （1, Hnba = 4-nitrobenzoicacid, bib = 1,4-bis（imidazol-l-yl）-butane）, was synthesized at room temperature condition andcharacterized by IR spectra, elemental analyses, single-crystal and powder X-ray diffractions.Complex 1 belongs to the monoclinic system, C2/c space group, with a = 26.0600（14）, b = 6.7889（4）,c = 16.5825（9）A, β= 118.8120（10）°, V= 2570.6（2） A3, Z= 4. It shows one-dimensional chains andis further linked by π-π stacking interactions to yield a three-dimensional supramolecular structure.Thermal stability and luminescence of 1 were investigated.

Cluster-based Magnetic Porous Coordination Polymers

The creation of a porous magnet is a long-sought academic goal since magnetism and porosity are hostile to one another. While long-range magnetic ordering needs spin carriers of short separation through short bridges, porosity relies on the use of extended connecting ligands. Here, we will give a survey of the cluster-based magnetic porous coordination polymers, i.e., 0-D MPCPs, according to their functional subunits： （1） nanoporous spin crossover materials with single metal nodes; （2） metal-radical approach with rigid organic radical ligands and single metal nodes; （C） PCPs with rigid organic ligands and metal oligomer nodes; （D） PCPs with metal complex linkers and polymetal cluster nodes; （E） PCPs with organo-polymetal cluster linkers and single metal nodes. The assembly from clusters can provide a reasonable route to resolve the hostility between magnetism and porosity. This assembly’s merits are obvious： the pore benefits from the big cluster according to ＂Scale Chemistry＂, and the functional framework inherits interesting physical properties from the clusters with a large ground spin S.

Two Coordination Polymers Containing Linear Co(Ⅱ)-Trinuclear and Cu(Ⅱ)-Chain Assembled from 4-Fluorocinnamic Acid and N-Donor Ligand

Two new coordination polymers,named {[Co3（pfca）6（phen）2]·2H2O}n（1） and[Cu（pfca）2（4,4＇-bpy）（H2O）]n（2）（Hpfca = 4-fluorocinnamic acid and 4,4-bpy = 4,4-bipyridine）,were hydrothermally synthesized and characterized by elemental analysis,IR spectroscopy,thermogravimetric analysis（TGA）,and single-crystal X-ray diffraction.Complex 1 crystallizes in the triclinic crystal system,space group P1 with a = 10.939（3）,b = 12.430（4）,c = 13.815（4） A,α=78.436（3）,β= 70.261（3）,γ= 80.268（3）°,V= 1721.8（9） A^3,Dc = 1.508 g/cm^3,Mr= 1564.06,Z = 1,F（000） = 799,μ= 0.802 mm^（-1）,the final R = 0.0432 and wR = 0.1015 for 13250 observed reflections with I 2σ（I）.Complex 2 is of monoclinic system,space group P2／lc with a =15.4985（14）,b = 15.8424（14）,c = 10.9528（10） A,β= 107.1600（10）°,V= 2569.6（4） A^3,Dc = 1.468g/cm^3,Mr = 568.02,Z = 4,F（000） = 1164,μ= 0.906 mm^（-1）,the final R = 0.0371 and wR = 0.0842 for 18183 observed reflections with I〉 2σ（I）.Complex 1 features linear Co（Ⅱ）-trinuclear units,which are assembled into a final 3D supramolecular structure through π…π stacking interactions and F-H weak interactions.Complex 2 consists of 1D polymeric Cu（Ⅱ）-chains that are further cohered together by extensive H-bonds.

Three Lanthanide Coordination Polymers Based on Novel Rigid Tetracarboxylate Ligand:Syntheses,Crystal Structures,and Luminescence Properties

Three lanthanide coordination polymers [Ln（bcpb）0.5（NO3）（DEF）2] （Ln = Y （1）, Tb （2）, Eu （3）, H4bcpb = 2,5-bis（2,4-dicarboxyphenyl） pyridine and DEF = N,N-diethylformamide）） have been solvothermally synthesized under hydrothermal conditions with a novel Hnbcpb ligand and trivalent lanthanide nitrates. Single-crystal X-ray diffraction analysis reveals that compounds 1-3 are isostructural and crystallize in the monoclinic system, space group P21/n. Crystal data for 1： C20H26N409Y, Mr = 555.36, a = 13.022（9）, b = 17.778（12）, c = 10.861（8） A, β= 100.208（3）°, V = 2475（3） A3, Z = 4; Crystal data for 2： C20H26N4OgTb, Mr = 625.37, a = 13.0476（4）, b = 17.8037（7）, c = 10.9398（3） A, β = 100.008（4）°, V = 2496.4（12） A3, Z = 4; Crystal data for 3： C20H26N409Eu, Mr = 618.41, a = 13.055（4）, b = 17.833（5）, c = 10.893（3）A, β = 100.133（4）°, V= 2496.4（12） A3, Z = 4. The compounds were characterized by thermogravimetric analysis （TGA）, IR spectroscopy, and X-ray single-crystal diffraction. Compounds 1-3 all feature 2D networks with -ABAB- fashions. The luminescent properties of compounds 1-3 and free H4bcpb ligand were investigated at room temperature. The results show that the H4bcpb ligand can efficiently transfer energy to the Tb（III） ions, while the energy is not fully transferred from the H4bcpb ligand to the Eu（III） ions.