Strong Fluorescent Emission Bands Research Articles

Facile preparation of thermosensitive and water-soluble fluorescent polymer containing curcumin and its cell imaging

ABSTRACTA novel thermosensitive and water-soluble fluorescent polymer PNIPAM-curcumin (P2) containing curcumin unit was synthesized through one-pot method. The chemical structure and optical properties of compounds and polymer were characterized and tested. As the results turned out that P2 displayed excellent water solubility, thermosensitivity and exhibited strong fluorescence emission band in water. Moreover, P2 was further investigated by MTT assay and live cell imaging with HeLa cells. P2 did not have cytotoxicity in concentration of 200 µg · mL−1 within 48 h and the intracellular fluorescence intensity enhanced with the concentration of P2 varying from 0 to 500 µg · mL−1. According to the experimental results, as a fluorescence probe, P2 synthesized does not only possess nice water solubility but also has the advantage of no cytotoxicity, and it can easily enter the cells, which indicates that it is a characteristic of high sensitivity and responsiveness. Therefore, P2 will have immense potential to be applied in biomedical fields.

Homo and Dinuclear Heteroleptic Zn, Cd & Pb Complexes Derived from FcCOOH and DTBbpy Ligands: Structural, Luminescence and Electrochemical Studies

Mononuclear [Zn(FcCOO)(DTBbpy)2]ClO4.(H2O)3 (1) and dinuclear [Cd2(FcCOO)2(DTBbpy)4]ClO4·(H2O) (2), [Pb2(FcCOO)2(DTBbpy)2(H2O)2]·ClO4 (3) (FcCOO = ferrocenecarboxylate, DTBbpy = 4,4′-di-tert-butyl-bipyridyl) metal complexes have been synthesized and characterized by single crystal X-ray diffraction. It reveals that the Zn(II), Cd(II) and Pb(II) metal complexes have different coordination geometries [Zn and Pb = distorted octahedral, Cd = distorted pentagonal bipyramidal]. The compound 3 shows the hemidirected mode of coordination in the geometrical system due to the inert pair effect of the lone pair of an electron on Pb(II) metal atom. The molecules are further forms 2D & 3D framework structure via intermolecular hydrogen bonding. All the three compounds exhibit strong fluorescence emission bands in the liquid state at ambient temperature, of which the emission maxima show red-shifted and the solution-state electrochemistry of compounds 1–3 in CH3CN has been investigated.

A novel water-soluble fluorescent polymer based on perylene bisimides dyes: one-pot preparation and its bio-imaging

Perylene bisimides dye-based water-soluble fluorescent polymer P3, N,N’-bis(3-amyl)-1-bromo-7-{4’-[3’’-(S-poly(N-acryloyl ethylene diamine hydrochloride)-2’’’-methyl propionic acid)propionyloxy hexyloxy]phenyl} perylene-3,4:9,10-tetracarboxylic bisimides, was synthesized with polyelectrolyte modification via one-pot reaction (the reduction reaction of trithioester and click reaction between the thiol group and carbon–carbon double bond were simultaneously conducted in one pot with high conversion). One-pot method can overcome the limitation that usual click reaction between thiol and other groups has low conversion because thiol group is subject to rapid oxidation during purification and storage. Chemical, structural, and optical properties of P3 and intermediate products were fully characterized by nuclear magnetic resonance spectroscopy, Fourier transform infrared, gel permeation chromatograph, UV–vis spectra, and fluorescence spectra, respectively. The results revealed that P3 displayed excellent water solubility and not only exhibited red strong fluorescence emission band in water but also had the similar photoluminescent spectra to those of intermediate products (M4 and P2) in chloroform. Allowing for the potential application in biological detection field, cell viability and live cell imaging with the presence of P3 were further investigated with Hela cells. The results showed that P3 had low cytotoxicity with strong intracellular fluorescence entry. Meanwhile, with the augment of concentration of P3 (0–0.500 mg mL−1), the cell uptake and accumulation of P3 increased and thereby result in enhancement of the intracellular fluorescence. These experiment results suggested that P3 had enormous potential as a fluorescence probe to be an important component in biological detection field.

A series of novel Zn(II) and Mn(II) metal-organic frameworks constructed by 2,4-bis-oxyacetate-benzoic acid: syntheses, structures and photoluminescence

A new carboxylic acid ligand, 2,4-bis-oxyacetate-benzoic acid (H3BOABA), was designed and introduced to construct novel metal-organic framework materials. [ZnNa(BOABA)(phen)(H2O)]·H2O ( 1 ), ZnNa(BOABA) ( 2 ), Mn3(BOABA)2(phen)2 ( 3 ), [Mn2(BOABA)(OH)]·(H2O)2 ( 4 ) (CCDC: 885138, 885137, 894225, 883094) were hydrothermally synthesized and characterized by elemental analysis, IR spectra and thermal gravimetric analyses. Crystal structures of the complexes were determined by single crystal X-ray diffraction method. Complex 1 is a one dimensional double edges non-interpenetrated framework decorated by the phen ligands on the surface. Complex 2 is an unique three dimensional open framework, consisting of Zn(II) and Na(I). Complex 3 is an unique double edges one dimensional MOF containing a [Mn3(BOABA)2(phen)2] n non-interpenetrated structure. Complex 4 is a two dimensional plane structure containing two Mn atoms in the same coordination environment. The interaction between four complexes and DNA were studied by EtBr fluorescence probe. Meanwhile, photoluminescence studies revealed that these four complexes display strong fluorescent emission bands in the solid state at room temperature.

Isolation and characterization of conformational isomers ofN,N′-bis(3,5-dichlorosalicylidene)-2,2′-ethylenedianiline: crystal structure, photoluminescence, and density functional theory calculation

We have isolated two isomeric solids 1 and 2 of N,N′-bis(3,5-dichlorosalicylidene)-2,2′-ethylenedianiline and characterized by IR, UV/Vis, X-ray powder diffraction, thermogravimetric analysis/differential thermal analysis, and X-ray crystallography. Although the solids are same formulas, each shows different colors and crystal structures. Orange solid (1) shows endo conformation while yellow solid (2) exhibits exo form depending on packing modes. UV/Vis spectra of 1 and 2 appear very similar patterns in the solid state; however, the bands of 1 are slightly red-shifted compared with those of 2. 1 displays a strong fluorescent emission band at ~582 nm while 2 shows an intense fluorescent signal at ~563 nm. The charge density populations of 1 and 2 have been studied by computational simulations using density functional theory at pbe1pbe/6-311G** level. The calculated highest occupied molecular orbital and lowest unoccupied molecular orbital energies of 1 and 2 confirm that charge transfer occurs within the organic molecules. The energy difference of HOMO-LUMO in 1 is smaller slightly than that of 2 about 0.05 eV (~17 nm). Copyright © 2014 John Wiley & Sons, Ltd.

Multinuclear coordination polymers based on Ag⋯Ag interaction: syntheses, structures, and luminescence properties

A series of coordination polymers based on Ag⋯Ag interactions, namely, [Ag2(hpyb)0.5(L1)0.5(NO3)]·H2O (1), [Ag4(hpyb)(HL2)(NO3)2]·2H2O (2), [Ag3(hpyb)0.5(L3)(NO3)] (3), [Ag6(hpyb)(L4)2(NO3)]·NO3·2H2O (4), [Ag5(hpyb)0.5(L5)2(NO3)]·H2O (5), {Ag4(hpyb)[L6(CH3)2]2} (6), {Ag6(hpyb)(HL7)2[L7(CH3)]} (7) and [Ag3(hpyb)0.5(HL8)]·H2O (8) (H2L1 = p-phthalic acid, H3L2 = 1,2,3-benzenetricarboxylic acid, H2L3 = cis-2-butenedioic acid, H2L4 = 2,3-pyridinedicarboxylic acid, H2L5 = m-phthalic acid, H4L6 = 1,2,4,5-benzenetetracarboxylic acid, H3L7 = 1,2,4-benzenetricarboxylic acid and H4L8 = 4,4′-oxydiphthalic acid) has been synthesized. For compounds 1–4, the polycarboxylate anions bridge multinuclear Ag(I) units to form 1D chains, respectively. The chains are extended by π–π interactions into a 2D supramolecular layer for compound 3 and 3D supramolecular architectures for compounds 1, 2 and 4. Compound 5 displays a 3D (4,8)-connected (34·42)(34·412·58·64)2 framework. Compounds 6–8 exhibit 2D layers, where the layers of 6 and 8 are further linked by π–π interactions to yield 3D supramolecular architectures. In the solid state, compounds 1–8 exhibit strong fluorescence emission bands at room temperature.

Crystal structure and characterization of two cadmium(II) coordination polymers with a multidentate N-donor tecton 3-(pyridin-4-yl)-5-(pyrazin-2-yl)-1H-1,2,4-triazole

Two new cadmium(II) complexes [Cd1.5(L)Cl2(H2O)]2 n (1) and [CdL2] n (2) with a multidentate N-donor building block 3-(pyridin-4-yl)-5-(pyrazin-2-yl)-1H-1,2,4-triazole (HL) have been prepared and characterized by elemental analysis, infra-red spectra, powder X-ray diffraction (XRD), and single-crystal XRD. 1 is a 2-D layered coordination polymer constructed from linkage of [Cd3(μ-Cl)4] trinuclear units with HL spacers, while 2 shows a 2-D layer structure. 3-D supramolecular architectures are further assembled in 1 and 2 via hydrogen-bonding contacts. Both 1 and 2 are thermally stable to 450 °C, and 2 showed strong fluorescent emission bands.

Synthesis, crystal structures, molecular simulations for hydrogen gas adsorption, fluorescent and antimicrobial properties of pyrazine-2,3-dicarboxylate complexes

Eight new pyrazine-2,3-dicarboxylate complexes have been synthesized and structurally characterized. The pzdc ligand bridges two neighboring metal atoms to form a 1D chain in complexes 1, 3–8. The structure of the complex 2 is mononuclear. It is noted that when dimethylformamide was replaced by methanol, a 1-D double-chain structure of 3 was formed instead of the mononuclear structure of 2. The most interesting feature of 3 is the presence of C–H⋯Cu close hydrogen bonding interactions. In complexes, the pzdc ligand exhibits four kinds of coordination modes. The adjacent chains are held together by hydrogen bonds, C–H⋯π and π⋯π interactions, forming three-dimensional network. Complexes 4–8 exhibit strong fluorescent emission bands in the solid state at room temperature. Atomically detailed simulations were used to assess the potential of complexes in gas storage applications. Complexes 2 and 7 have showed antimicrobial activity on studied microorganisms.

Hydrothermal syntheses and characterization of a series of luminescent Cd(ii) frameworks with pyridine-based and benzene-based bis-triazole ligands

Using the pyridine-based and benzene-based bis-triazole ligands 2,6-di-(1,2,4-triazole-4-yl)pyridine (L1) and 1,4-di-(1,2,4-triazole-4-yl) benzene (L2), a series of luminescent Cd(II) coordination polymers, namely, [Cd(μ2-L1)2I2]n (1), {[Cd3(μ3-L1)6](BF4)5(PF6)·18H2O}n (2), [Cd(μ2-L2)I2]n (3), [Cd(μ2-L2)(μ1,3-NCS)2]n (4), {[Cd(μ2-L2)(L2)(H2O)3]SiF6·3H2O}n (5), {[Cd(μ2-L2)(L2)(H2O)3]SiF6·CH3OH·2.5H2O}n (6), {[Cd(μ2-L2)3](BF4)2}n (7) and {[Cd(μ2-L2)3](ClO4)2}n (8), have been isolated. 1 represents a novel 2D framework containing 1D infinite right- and left-handed helical chains. 2 is a 3D coordination framework based on trinuclear Cd(II) clusters containing triangular channels, in which eighteen free water molecules, five free BF4− and one free PF6− anions are located. For 3, the L2 ligands can bridge CdII centers forming a 1D chain, while for 4 the L2 and μ1,3-NCS− co-ligands can further bridge CdII centers forming a 2D corrugated layer. 5 and 6 represent a novel coordination framework containing 1D rhombic nano-porous channels, in which free SiF62− anions and free solvent molecules are located. 7 and 8 also represent a novel coordination framework containing another kind of trianglular nano-porous channel, in which free BF4− or ClO4− anions are located. Solid-state fluorescent spectra of 1–8 have been determined indicating strong fluorescent emission bands. The result also reveals that L1 and L2 can adopt versatile coordination modes and have great potential in the construction of these highly-dimensional luminescent coordination frameworks.

A magnesium-based multifunctional metal–organic framework: synthesis, thermally induced structural variation, selective gas adsorption, photoluminescence and heterogeneous catalytic study

Three magnesium based carboxylate framework systems were prepared through a temperature-dependent synthesis. The compounds were synthesized by a hydrothermal method and characterized by single crystal X-ray diffraction analysis. A stepwise increase in the temperature of the medium resulted a stepwise increase in the dimensionality of the network, ultimately leading to the formation of a new 2D layered alkaline earth metal-organic framework (MOF) compound, {[Mg2(HL)2(H2O)4]·H2O}n (1) (H3L = pyrazole-3,5-dicarboxylate). Compound 1 selectively adsorbs hydrogen (H2) (ca. 0.56 wt% at 77 K) over nitrogen at 1 atm and demonstrates a strong blue fluorescent emission band at 480 nm (λ(max)) upon excitation at 270 nm. Notably, the 2D framework compound efficiently catalyzes the aldol condensation reactions of various aromatic aldehydes with ketones in a heterogeneous medium under environmentally friendly conditions. The catalyst can be recycled and reused several times without any significant loss of activity.

A three-dimensional silver(I) framework assembled from 3,3′-thiodipropionate: Synthesis, structure and molecular simulations for hydrogen gas adsorption

A novel three dimensional Ag(I)-3,3′-thiodipropionate metal–organic framework, [Ag2(μ8-tdp)]n (1) (tdpH2=3,3′-thiodipropionic acid), was synthesized and structurally characterized by FT-IR and photoluminescence spectroscopy, single crystal X-ray diffraction techniques and thermal analysis (TG, DTG and DTA). The compound crystallized in the monoclinic crystal system with the space group C2/c. The X-ray crystallographic study of 1 shows a short Ag⋯Ag contact with a distance of 3.022Å. The most striking feature of 1 is that it exhibits a 3D porous framework with 1D infinite channels, and complex 1 exhibits strong fluorescent emission bands in the solid state at room temperature. Moreover, atomically detailed simulations were used to assess the potential of the complex for H2 storage applications.

Syntheses, crystal structures and luminescent properties of anion-tuned triazolate–silver(I) complexes

The self-assembly of silver(I) salts (AgAsF6, AgCF3CO2) with the bitopic triazole ligand 4-(2-pyridinyl)-1,2,4-triazole (L1) produced two dinuclear complexes [Ag(L1)2]2(AsF6)2·3H2O (1) and [Ag(L1)(CF3CO2)(H2O)]2 (2). While the reaction of the tritopic ligand 4-(3-pyridinyl)-1,2,4-triazole (L2) with AgCF3SO3 and AgCH3CO2 afforded the two-dimensional meso {[Ag2(L2)2(CF3SO3)2]·0.5H2O}n (3) and, containing alternative left- and right-handed helical chains and an infinite two-dimensional architecture, {[Ag(L2)](CH3CO2)·0.75H2O}n (4) with 4.82 topology. Structural analyses indicate that the increase of coordination number (from 2 to 3) of the ligand is an effective route to obtain high-dimensional structures (from zero- to two-dimensional). Moreover, the anions not only play an important role in the outcome of the resulting supramolecular array, but also greatly influence the configurations of the ligands to tune the coordination network topology. Both in the solid state and in aqueous solution, all four complexes exhibit strong fluorescent emission bands, which may be assigned to intra-ligand fluorescent emissions.

Synthesis and Photoelectronic Properties of Thermally Stable Poly[oxy(2,7-fluoren-9-onenylene)oxy(diorganosilylene)

Melt copolymerization reactions of several bis(diethylamino)silane derivatives, bis(diethylamino)methylphenylsilane, bis(diethylamino)methyloctylsilane, 1,2-bis(diethylamino)tetramethyldisilane, and 1,3-bis(diethylamino) tetramethyldisiloxane, with 2,7-dihydroxyfluoren-9-one were carried out to yield poly[oxy(2,7-fluoren- 9-onenylene)oxy(diorganosilylene)]s bearing the fluoren-9-one fluorescent aromatic group in the polymer main chain: poly[oxy(2,7-fluoren-9-onenylene)oxy(methylphenylsilylene)], poly[oxy(2,7-fluoren-9-onenylene) oxy(methyloctylsilylene)], poly[oxy(2,7-fluoren-9-onenylene)oxy(tetramethyldisilylene)], and poly[oxy- (2,7-fluoren-9-onenylene)oxy(tetramethyldisiloxanylene)]. These polymeric materials are soluble in common organic solvents such as and THF. FTIR spectra of all the materials reveal characteristic Si-O-C stretching frequencies at 1012-1018 . In the THF solution, the prepared materials show strong maximum absorption peaks at 258-270 nm, strong maximum excitation peaks at 260-280 nm, and strong maximum fluorescence emission bands at 310-420 nm. TGA thermograms suggest that most of the polymers are essentially stable to without any weight loss and up to with only a weight loss of less than 5% in nitrogen.

Five new Zn(II) and Cd(II) coordination polymers constructed by 3,5-bis-oxyacetate-benzoic acid: Syntheses, crystal structures, network topologies and luminescent properties

Five Zn(II) and Cd(II) coordination polymers, [Zn2(BOABA)(bpp)(OH)]·0.5H2O (1), [Cd3(BOABA)2(bpp)2(H2O)6]·2H2O (2), [Cd3(BOABA)2(2,2′-bipy)3(H2O)4]·5.5H2O (3), [CdNa(BOABA)(H2O)]2·H2O (4) and [Cd2(BOABA)(bimb)Cl(H2O)2]·H2O (5) (H3BOABA=3,5-bis-oxyacetate-benzoic acid, bpp=1,3-bi(4-pyridyl)propane, 2,2′-bipy=2,2′-bipyridine, bimb=1,4-bis(imidazol-1′-yl)butane), have been solvothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analyses, IR spectra and TG analyses. 1 is an uninodal 4-connected 2D square grid network based on binuclear zinc clusters. 2 is 2D wavelike layer structure and further linked by hydrogen bonds into the final 3D (5,6,6)-connected topology network. 3 is 3-connected 2D topology network and the 2,2′-bipy ligands decorate in two different types. 4 is a (4,8)-connected 2D topology network with heterocaryotic {Cd2Na2} clusters and BOABA3– ligands. 5 can be rationalized as a (3,10)-connected 3D topology network with tetranuclear {Cd4Cl2} clusters and BOABA3– ligands. Meanwhile, photoluminescence studies revealed that these five coordination polymers display strong fluorescent emission bands in the solid state at room temperature.

Various structures from 1D to trinuclear by anion-induced conversion

Reaction of ZnCl2 or ZnBr2 with 4-(3-pyridinyl)-1,2,4-triazole (pytrz) yields two novel 1D coordination polymers, [Zn(pytrz)Cl2]n (1) and [Zn(pytrz)Br2]n (2). Their crystal structures have been determined using X-ray single crystal diffraction analysis. Their subsequent reactions with additional NaClO4 resulted in a re-assembled molecular structure, [Zn3(pytrz)6(H2O)6](ClO4)3 (3), featuring a linear trinuclear complex. In this work, conversion from 1D to 0D triggered by anion-induce have been achieved based on pytrz. ClO4− anions may act as the templates during the re-assembly and all of the three complexes exhibit strong blue fluorescence emission bands in the H2O solution at ambient temperature.

Melt Copolymerization Reactions between 1,3-Bis(diethylamino)tetramethyldisiloxane and Aryldiol Derivatives

Melt copolymerization reactions of bis(diethylamino)tetramethyldisiloxane with several aryldiols were carried out to afford poly(carbotetramethyldisiloxane)s containing fluorescent aromatic chromophore groups in the polymer main chain: poly{oxy(4,4'-biphenylene)oxytetramethyldisiloxane}, poly{oxy(1,4-phenylene)oxytetramethyldisiloxane}, poly[oxy{(4,4'-isopropylidene)diphenylene}oxytetramethyldisiloxane], poly[oxy{(4,4'-hexafluoroisopropylidene)diphenylene}oxytetramethyldisiloxane], poly{oxy(2,6-naphthalene)oxytetramethyldisiloxane}, poly[oxy{4,4'-(9-fluorenylidene)diphenylene}oxytetramethyldisiloxane], poly{oxy(fluorene-9,9-dimethylene)oxytetramethyldisiloxane}, and poly[oxy{4,4'-(9-fluorenylidene)bis(2-phenoxyethylene)}oxytetramethyldisiloxane]. These materials are soluble in common organic solvents such as <TEX>$CHCl_3$</TEX> and THF. The FTIR spectra of all the polymers exhibit the characteristic Si-O-C stretching frequencies at 1021-1082 <TEX>$cm^{-1}$</TEX>. In the THF solution, the polymeric materials show strong maximum absorption peaks at 215-311 nm, with strong maximum excitation peaks at 250-310 nm, and strong maximum fluorescence emission bands at 310-360 nm. TGA thermograms indicate that most of the polymers are stable up to <TEX>$200^{\circ}C$</TEX> with a weight loss of less than 10% in nitrogen.

Lanthanide complexes with disulfide ligand generated in situ: Syntheses, crystal structures and fluorescent properties

Five new lanthanide complexes [Ln 2(DTDN) 4(phen) 4]·7H 2O·2H 3O + (Ln = Nd ( 1), Sm ( 2), Eu ( 3), Tb ( 4), Dy ( 5), H 2DTDN = 2,2′-dithiodinicotinic acid, phen = 1,10-phenanthroline) have been solvothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analyses, IR spectra, and TG analyses. By in situ oxidation of 2-mercaptonanicotinic acid (2-H 2MN), the expected ligand H 2DTDN was generated. All crystals are isostructural and crystallize in monoclinic system with space group C2/ c. The metal center is eight-coordinated completely by four carboxylic oxygen atoms from four different DTDN 2− ligands, and four nitrogen atoms from two phen molecules with a distorted square-antiprismatic geometry. The structures can be considered as two-dimensional (2D) structures and further linked by hydrogen bonds into the final trinodal 4-connected network. Photoluminescence studies revealed that complexes 2– 5 exhibit strong fluorescent emission bands in the solid state at room temperature.

Syntheses of triazole-bridged cadmium coordination polymer with luminescence properties

A novel triazole-bridged cadmium 1D coordination polymer, [Cd(Admtrz)Cl2]n (I) (Admtrz = 3,5-dimethyl-4-amino-1,2,4-triazole), has been synthesized under hydrothermal conditions and structurally characterized by elemental analysis, IR spectra, and single-crystal X-ray diffraction. Complex I was constructed from μ2-Cl, μ3-Cl, and triazole bridging modes. It exhibits a strong blue fluorescence emission band in the solid state at ambient temperature.

Novel lead(II) coordination polymers based on p-sulfophenylarsonic acid

Hydrothermal reactions of lead(II) salts with p-sulfophenylarsonic acid ( p-HO 3S-C 6H 4-AsO 3H 2, H 3L) afforded two novel lead(II) p-sulfonate-arsonates, namely, Pb 3(L) 2(H 2O)·H 2O ( 1) and Pb 3(L) 2·6.5H 2O ( 2). Their structures feature two different types of three-dimensional structures. In compound 1, the interconnection of Pb(II) ions by bridging arsonate and sulfonate groups results into a 2D layer parallel to the bc plane. These layers are further cross-linked by phenyl groups into a pillared-layered architecture with small voids occupied by the lattice water. Compound 2 features a 3D open framework based on 1D lead sulfonate-arsonate chains of Pb 3O 4 clusters along c-axis that are further cross-linked by phenyl groups, forming large tunnels along c-axis which are occupied by a number of lattice water molecules. Introduction of 2,2′-bipyridine (bipy) or 1,10-phenanthroline (phen) as the auxiliary chelating ligand into the above system led to two new mixed-ligand lead(II) sulfonate-arsonates, namely, Pb(HL)(bipy)·2H 2O ( 3) and Pb(HL)(phen)·2H 2O ( 4). Compounds 3 and 4 display a similar one-dimensional chain in which neighboring Pb 2O 2 units are bridged by a pair of HL 2− anions. There also exists a 1D water chain in compound 3. All four compounds display strong fluorescent emission bands in the green or red light region.

Two novel coordination polymers [Sm2(Pzdc)3(H2O)] x · 2xH2O and [Nd2(Pzdc)3(H2O)]x · 2xH2O: Synthesis, structure, and photoluminescent properties

Coordination polymers, [Sm2(Pzdc)3(H2O)] x · 2xH2O (I) and [Nd2(Pzdc)3(H2O)] x · 2xH2O (II), were obtained by hydrothermal reactions with 2,3-pyrazinedicarboxylic acid (H2Pzdc) and the salts nitrates, and characterized by single crystal X-ray structure, thermogravimetric analysis, element analysis and infrared spectroscopy. The X-ray crystal diffraction data indicates that two complexes crystal in a monoclinic system with the space group P21/c, of the three dimensional framework. The Pzdc ligand in the complexes I and II adopts tetradentate, hexadentate, and heptadentate bridging modes. The influences of coordination modes of the Pzdc ligand on the superstructural diversity is discussed. The photoluminescent data suggest that the ligands act as efficient “antennas” sensitizing the luminescence of the Sm3+ ion. Complex I exhibits strong fluorescent emission bands in the solid state at room temperature.