Bidentate Chelating Carboxylate Group Research Articles

Novel Coordination Polymer of Cadmium (II) with L-Tryptophan

A new cadmium (II) polymeric coordination compound with tryptophan (Trp) of general formula {[Cd(L-Trp)2(H2O)Cl]∙(Trp)∙(H2O)}n was synthesized. The monocrystals of the investigated complex were obtained using the method of slow evaporation. The crystal and molecular structure was determined. The compound was crystallized in the orthorhombic P212121 space group. The cadmium atom was seven coordinates by two oxygen atoms from one bidentate-chelating carboxylate group of bridging Trp, two oxygen atoms from one bidentate-chelating carboxylate group from a monodentate organic ligand, one oxygen atom of water molecule, one nitrogen atom of the amino group from bridging Trp and one chlorine atom, which means that every tridentate Trp substituent was bridging towards one cadmium atom and bidentate chelating towards one another. The monodentate Trp is a zwitterionic molecule. The coordination led to the formation of 1D supramolecular chains entrapping water and Trp molecules.

Synthesis, Crystal Structures and Photoluminescent Properties of One-Dimensional Europium(III)- and Terbium(III)-Glutarate Coordination Polymers, and Their Applications for the Sensing of Fe3+ and Nitroaromatics

Two lanthanide–glutarate coordination polymers, viz. : {[Eu(C5H6O4)(H2O)4]Cl}n, (1) and [Tb(C5H7O4)(C5H6O4)(H2O)2]n, (2) have been synthesized and characterized by IR spectroscopy, thermogravimetric analysis, and X-ray crystallography. In 1, the Eu(III) ions are coordinated by four O atoms from two bidentate chelating carboxylate groups, one O atom from a bridging carboxylate group and four O atoms from water molecules adopting an EuO9 distorted tri-capped trigonal prismatic coordination geometry. In 2, the Tb(III) ions are coordinated by six O atoms from three bidentate chelating carboxylates, one O atom from a bridging carboxylate and two O atoms from water molecules to generate distorted tri-capped trigonal prismatic TbO9 polyhedron. In both compounds, the metal polyhedra share edges, producing centrosymmetric Ln2O2 diamonds, and are linked into [001] chains by bridging glutarate di-anions. The crystal structures are consolidated by O–H···O and O–H···Cl hydrogen bonds in 1, and O–H···O hydrogen bonds in 2. Compound 1 exhibits a red emission attributed to the 5D0 → 7FJ (J = 1–4) transitions of the Eu(III) ion, whereas 2 displays green emission corresponding to the 5D4 → 7FJ (J = 0–6) transitions of the Tb(III) ion. Both the compounds exhibit high sensitivity and selectivity for Fe3+ ions due to luminescence quenching compared with other metal ions, which include; Na+, Mg2+, Al3+, Cr3+, Mn2+, Fe2+, Co2+, Ni2+, Zn2+ and Cd2+. Compounds 1 and 2 also show high luminescence quenching sensitivity for 4-nitrophenol over the other aromatic and nitroaromatic compounds, namely; bromobenzene, 1,3-dimethylbenzene, nitrobenzene, 4-nitrotolune, 4-nitrophenol, 2,6-dinitrophenol and 2,4,6-trinitrophenol.

New lanthanide biphenyl-4,4′-diacetates − hydrothermal synthesis, spectroscopic, magnetic and thermal investigations

The hydrothermal reaction of lanthanide chlorides and sodium salt of biphenyl-4,4′-diacetic acid (H2bpda) yielded a series of coordination polymers of the general formula Ln2(bpda)3·nH2O (Ln=lanthanide ions(III) except for Pm(III), n=3–7). Single-crystal and powder X-ray diffraction analyses revealed that complexes form three-dimensional coordination networks. Tetradentate biphenyl-4,4′-diacetate ligand coordinates Ln(III) through both bidentate-chelating carboxylate groups. Their thermal behaviours was investigated by the TG-DSC and TG-FTIR methods. The influence of atmosphere of heating on thermal stability of complexes was also examined. Magnetic studies of neodymium and praseodymium complexes showed weakly antiferromagnetic exchange interactions between lanthanide ions.

A two-dimensional cadmium(II) coordination polymer based on 5-(pyridin-4-yl)isophthalic acid: poly[[tetraaquabis[μ₃-5-(pyridin-4-yl)isophthalato]dicadmium(II)] pentahydrate

The title Cd(II) compound, {[Cd2(C13H7NO4)2(H2O)4]·5H2O}n, was synthesized by the hydrothermal reaction of Cd(NO3)2·4H2O and 5-(pyridin-4-yl)isophthalic acid (H2L). The asymmetric unit contains two crystallographically independent Cd(II) cations, two deprotonated L(2-) ligands, four coordinated water molecules and five isolated water molecules. One of the Cd(II) cations adopts a six-coordinate octahedral coordination geometry involving three O atoms from one bidentate chelating and one monodentate carboxylate group of two different L(2-) ligands, one N atom of another L(2-) ligand and two coordinated water molecules. The second Cd(II) cation adopts a seven-coordinate pentagonal-bipyramidal coordination geometry involving four O atoms from two bidentate chelating carboxylate groups of two different L(2-) ligands, one N atom of another L(2-) ligand and two coordinated water molecules. Each L(2-) ligand bridges three Cd(II) cations and, likewise, each Cd(II) cation connects to three L(2-) ligands, giving rise to a two-dimensional graphite-like 6(3) layer structure. These two-dimensional layers are further linked by O-H···O hydrogen-bonding interactions to form a three-dimensional supramolecular architecture. The photoluminescence properties of the title compound were also investigated.

Three Novel Cd(II) and Zn(II) Coordination Polymers with O-, N-donor Ligands: Syntheses, Structures, and Photoluminescence Properties

Three new multi-dimensional coordination polymers, namely, [Cd(SIP)(HBPP)(BPP)0.5(H2O)·H2O]n (1), [Zn(L)(BIB)0.5]n (2), and {[Cd2(L)2(BIB)2](H2O)7}n (3) (H3SIP = 5-sulfo-1,3-benzenedicarboxylate, BPP = 1,3-bis(4-pyridyl)propane, H2L = 4-oxyacetate-benzoic acid, and BIB = 1,4-bis(imidazol-1-yl)-butane), were hydrothermally synthesized by self-assembly of the flexible N-donor ligand and the polycarboxylate ligands. Single crystal X-ray analyses reveal that complexes 1–3 possess different structural features. The Cd(II) atom in complex 1 is seven-coordinated by two bidentate chelating carboxylate groups and two nitrogen atoms as well as one water molecule. The adjacent Cd(II) atoms are bridged by two carboxylate groups to form 1D chains running along different directions, which are connected by BPP ligands to generate 2D network. The resulting 2D networks are further linked by hydrogen-bond interactions, affording a 3D supramolecular architecture. In complex 2, the [Zn2(COO)4] units are bridged by L2− ligands to generate 1D double chain structure and then linked by BIB ligands to give 2D grid framework. In complex 3, the [Cd(L2)]n and [Cd(BIB)]n helixes are alternately arranged, leading to the formation of a 2D bilayer structure.

Synthesis, crystal structure, and luminescence properties of new binuclear europium and terbium complexes with tubular morphology

The two dinuclear rare earth complexes Eu2(PBa)6(Phen)2 and Tb2(PBa)6(Phen)2, (where PBa=4-pentylbenzoate group and Phen=1, 10-phenanthroline), were synthesized and characterized by elemental analysis, IR, and single crystal X-ray diffraction. Both of them crystallize in space group P-1 with similar cell parameters. Each Eu or Tb ion is nine-coordinated with one 1, 10-phenanthroline molecule, one bidentate chelating carboxylate group, two bidentate bridging carboxylate groups, and two tridentate bridging carboxylate groups. The fluorescent properties of the europium and terbium complexes were also investigated. Under the UV excitation, the two complexes exhibit extensive characteristic emissions of europium and terbium ions, respectively.

Sodium tris(acetato-κ2O,O′)dioxidoamericate(VI) and guanidinium tris(cyclopropanecarboxylato-κ2O,O′)dioxidoamericate(VI)

The title compounds, Na[{AmO(2)}(C(2)H(3)O(2))(3)], (I), and (CH(6)N(3))[{AmO(2)}(C(4)H(5)O(2))(3)], (II), contain complex anions in which AmO(2)(2+) cations are surrounded by three bidentate-chelating carboxylate groups. The atoms of the AmO(2) group and the Na atoms in (I) are situated on threefold axes. All the atoms in (II) occupy general positions. Both compounds are isomorphous with earlier studied analogous compounds of previous members of the actinide (An) series.

Crystal structure and luminescence of a terbium complex with p-methyl benzoate and 1,10-phenanthroline

A terbium p-methyl benzoate complex with 1,10-phenanthroline, [Tb(p-MBA)3(Phen)]2 (p-MBA = p-methyl benzoate and Phen = 1,10-phenanthroline), has been prepared and structurally characterized by X-ray diffraction. It crystallizes in triclinic system, space group P\( \bar 1 \) with a = 12.8064(12), b = 13.3589(12), c = 19.8277(19) A, α = 91.668(2)°, β = 97.775(2)°, γ = 106.312(2)°, C72H58N4O12Tb2, Mr = 1489.06, V = 3217.6(5) A3, Z = 2, ρc = 1.537 g/cm3, μ(MoKα) = 2.246 mm−1, F(000) = 1488, the final R = 0.0622 and wR = 0.0962 for 14128 independent reflections with Rint = 0.0843. It consists of two types of crystallographically independent dimeric molecules [Tb(p-MBA)3(Phen)]2 noted as [Tb-1] and [Tb-2]. In the dimeric molecule [Tb-1], each Tb(III) is eight-coordinated with one Phen molecule, two bridging carboxylate groups, and two bidentate chelating carboxylate groups, while in [Tb-2] each Tb(III) is eight-coordinated with one Phen molecule, four bridging carboxylate groups, and one bidentate chelating carboxylate group. The title complex shows intense green luminescence under UV light at room temperature.

Silver(I) complexes with a bulky acridine-based carboxylic ligand: Syntheses, crystal structures, and luminescent properties

Two new Silver(I) complexes, {[Ag L]·(H 2O) 2} n ( 1, H L = acridine-9-carboxylic acid) and {[Ag( L)(4,4′-bipy)]·(H 2O) 5} n ( 2), has been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction analysis. Ag(I) ion in complex 1 is coordinated by L as a bridging ligand with its acridine N donor and bidentate chelating carboxylate group forming a 1D chain. Different from 1, complex 2 adopts a 1D chain structure with 4,4′-bipy as a bridging ligand. In 2, L coordinates to Ag(I) ion as a terminal ligand by its carboxylate group in a bidentate chelating mode similar to that in 1, leaving N donor as a H-bond acceptor. It is worth noting that in 1 C–H⋯Ag weak interactions are observed, and these weak interactions are also elucidated by theoretical investigation of TD-DFT (B3LYP) methods and NBO analysis. Furthermore, the photoluminescence properties of 1 and 2 are also investigated in the solid state at room temperature, and the theoretical calculations of the absorption and emission spectra of 1 were carried out with B3LYP method on the basis of the experimental structure.

Synthesis, structures and properties of ternary rare earth complexes with m-methoxybenzoic acid and 1,10-phenanthroline

Two dimeric rare earth complexes [Eu( m-MOBA) 3(phen)] 2 ( I) and [Tb( m-MOBA) 3(phen)] 2·2C 2H 5OH ( II) (where m-MOBA = m-methoxybenzoate, phen = 1,10-phenanthroline) were synthesized and structurally characterized. Both complexes consist of neutral dimeric molecules. Complex I crystallizes in triclinic system, space group P 1 ¯ . Each Eu(III) ion is nine-coordinated with one 1,10-phenanthroline molecule, one bidentate chelating carboxylate group, two bridging bidentate carboxylate groups and two bridging tridentate chelating carboxylate groups. Complex II crystallizes in triclinic system, space group P 1 ¯ . Each Tb(III) is eight-coordinated with one 1,10-phenanthroline molecule, one bidentate chelating carboxylate group and four bridging bidentate carboxylate groups. Complex I shows bright red luminescence, II shows green luminescence under UV light at room temperature, respectively. The thermal analysis indicates that they are all quite stable to heat.

3-D supramolecular frameworks assembled by lanthanide binuclear molecules based on 1,2-phenylenedioxydiacetic acid and 1,10-phenanthroline

The complexes [Ln2(PDOA)3(phen)2(H2O)2]·2H2O (Ln=Eu (1), Tb (2), and Dy (3); H2PDOA=1,2-phenylenedioxydiacetic acid; phen=1,10-phenanthroline) have been synthesized and structurally characterized by single crystal X-ray diffraction methods. The three complexes are all binuclear molecules. The two Ln(III) centers are linked by only one PDOA ligand through its two bidentate-chelating carboxylate groups. PDOA also acts as a terminal ligand using one carboxylate oxygen and ether oxygen atoms to chelate the Ln(III) ion. 3-D supramolecular frameworks are built up by the hydrogen bonds and π–π stacking interactions. The fluorescent spectra of the three complexes show the characteristic emission of the Eu(III) for 1, Tb(III) for 2, and Dy(III) for 3, respectively.

Synthesis, crystal structure and properties of two ternary rare earth complexes with aromatic acid and 1,10-phenanthroline

Abstract Two dimeric rare-earth complexes [Eu(o-MOBA)3phen]2·2H2O (1), [Tb(o-MOBA)3phen]2·2H2O (2), (where o-MOBA = o-methoxybenzoate, phen = 1,10-phenanthroline) were synthesized and structurally characterized. Both of them consist of neutral dimeric molecules, crystallize in triclinic system, space group P 1 ¯ . Each RE(III) ion is nine-coordinated with one 1,10-phenanthroline molecule, one bidentate chelating carboxylate group, two bidentate bridging carboxylate groups and two tridentate bridging carboxylate groups. Complex 1 shows bright red luminescence, 2 shows green luminescence under UV light at room temperature, respectively. The thermal analysis indicates that they are all quite stable to heat.

Preparation, crystal structure and mechanism of thermal decomposition of complex [Dy(p-MOBA)3Phen

1,10-Phenanthrolinetris(4-methoxybenzoate)dysprosium, Dy(p-MOBA)3Phen (where p-MOBA = p-methoxybenzoate and Phen = 1,10-phenanthroline), (I) has been synthesized. The complex was characterized by various techniques including elemental analysis, UV, IR, XRD, molar conductance, and TG-DTG. The crystals consist of binuclear molecules and monoclinic, space group P2 1/n: a = 14.143(6) A, b = 17.550(7) A, c = 14.493(6) A, β = 117.357(4)°, Z = 2, ρ c = 1.655 g cm−3, F(000) = 1588; R 1 = 0.0176, wR 2 = 0.0455. In the complex, each Dy3+ ion is nine-coordinate to one 1,10-phenanthroline molecule, one bidentate chelating carboxylate group, and four bridging carboxylate groups in which the carboxylate groups are bonded to the Dy3+ ions in three modes: bridging bidentate, bridging tridentate, and chelating bidentate. The thermal decomposition mechanism of I has been determined on the basis of thermal analysis. In addition, the lifetime equation at a weight-loss of 10% was deduced as lnτ = −28.8361 + 19478.37/T by isothermal thermogravimetric analysis.

Synthesis, Crystal Structure and Thermal Decomposition Mechanism of a Dysprosium(III) p-Fluorobenzoate 1,10-Phenanthroline Complex

A dinuclear dysprosium(III) p-fluorobenzoate 1,10-phenanthroline complex, [Dy(p-FBA)3phen]2 was synthesized and characterized by elemental analysis, UV and IR spectroscopy, single crystal X-ray diffraction, molar conductance, and TG-DTG techniques. It crystallizes in the triclinic space group P1̄ with a = 9.895(5), b = 11.754(6), c = 14.756(10)Å ; α = 106.660(9)°, β = 107.956(9)°, γ =101.472(7)°; Z =1. The Dy(III) ions are eight coordinate including one terminal bidentate chelating carboxylate group, four bridging carboxylate groups and one 1,10-phenanthroline molecule. The thermal decomposition of [Dy(p-FBA)3phen]2 has been followed by thermal analysis. The lifetime equation at weight-loss of 10% was deduced as lnτ = −27.0798 +19010.2434/T by isothermal thermogravimetric analysis.

Synthesis, crystal structure and thermal decomposition mechanism of a samarium o-chlorobenzoate complex with 1,10-phenanthroline

The title complex [Sm(oClBA)3phen]2 (oClBA= o-chlorobenzoate; phen= 1,10-phenanthroline) was prepared by the reaction of SmCl3·6H2O, o-chlorobenzoic acid and 1,10-phenanthroline. The complex was characterized by single crystal X-ray diffraction, elemental analysis, IR spectra and TG-DTG techniques. The results show that the crystal is triclinic, space group P I with a = 13.157(3) A, b = 14.139(4) A, c = 17.397(4) A, a = 83.755(3)o, b = 84.064(3)o, g =73.434(3)o, Z=2, Dc=1.722 Mg/m3, F(000)=1572. The crystal contains two crystallographically distinct Sm(o-ClC6H4COO)3(C12H 8N2) units, forming two types of binuclear molecule. Each Sm3+ is coordinated to two O atoms of one bidentate chelating carboxylate group, five O atoms of two bidentate bridging and two tridentate chelating-bridging carboxylate groups, and two N atoms of one 1,10-phenanthroline molecule to complete a distorted mono-capped square antiprism geometry. Its thermal decomposition mechanism was determined by TG-DTG techniques, and kinetic parameters have been studied on the first-step decomposition of [Sm(oClBA)3phen]2 by means of Kissinger's method and Ozawa-Doyle's method. The lifetime equation at weight-loss of 10% was deduced as lnt= 26.8166+20319.94/T by isothermal thermogravimetric analysis.

Synthesis, Crystal Structure and Thermal Decomposition Process of Complex [Sm(BA)3phen]2

A binuclear samarium(III) complex with benzoic acid and 1,10-phenanthroline, [Sm(BA)3phen]2 was synthesized and characterized by elemental analysis, UV, IR and TG-DTG techniques. The structure of the title complex was established by single crystal X-ray diffraction. The crystal is triclinic, space group P1 with a = 10.8216(11) Å, b = 11.9129(13) Å, c = 12.425(2) Å, α = 105.007(2)°, β = 93.652(2)°, γ = 113.2630(10)°, Z = 1, Dc = 1.650 mg·m−3, F(000) = 690. The carboxylate groups are bonded to the samarium ion in three modes: bidentate chelating, bidentate bridging, and tridentate chelating-bridging. Each Sm3+ ion is coordinated to one bidentate chelating carboxylate group, two bidentate bridging and two tridentate chelating-bridging carboxylate groups, as well as one 1,10-phenanthroline molecule, forming a nine-coordinate metal ion. Based on thermal analysis, the thermal decomposition process of [Sm(BA)3phen]2 has been derived.

Synthesis, crystal structure and thermal decomposition mechanism of complex [Sm( o-MBA) 3phen] 2

The title complex [Sm( o-MBA) 3phen] 2 ( o-MBA, o-methylbenzoate; phen, 1,10-phenanthroline) was prepared and characterized by single crystal X-ray diffraction, elemental analysis, IR spectra and TG-DTG techniques. The results show that the crystal is triclinic, space group P ī with a = 13.1364(10) Å, b = 14.3739(11) Å, c = 17.4356(13) Å; α = 83.1100(10)°, β = 83.7760(10)°, γ = 73.0520(10)°, Z = 2, D c = 1.568 Mg/m 3, F (000) = 1476. The crystal is consisted of two similar types of binuclear molecule. Each Sm 3+ is nine-coordinated by one bidentate chelating carboxylate group, two bidentate bridging and two tridentate chelating-bridging carboxylate groups, as well as one 1,10-phenanthroline molecule. The thermal decomposition mechanism of [Sm( o-MBA) 3phen] 2 has been determined on the basis of thermal analysis. The dependences of E − α for the first-stage decomposition process were determined by using Ozawa-iterative procedure, which show the E values varied with the extent of conversion. In addition, the lifetime equation at weight-loss of 10% was deduced as ln τ = −25.5547 + 18511.68/ T by isothermal thermogravimetric analysis.

Synthesis, structure and luminescent property of a binuclear terbium complex [Tb 2(Hsal) 8(H 2O) 2][(Hphen) 2]·2H 2O

A binuclear terbium complex [Tb 2(Hsal) 8(H 2O) 2][(Hphen) 2]·2H 2O 1 (Hsal= o-HOC 6H 4CO 2 −, phen=1,10-phenanthroline) was synthesized and characterized by elemental analysis, molar conductance, IR, UV–VIS, X-ray powder diffraction, Thermogravimetric analysis and fluorescence. Its structure was determined by X-ray single crystal diffraction. In the dimeric anion [Tb 2(Hsal) 8(H 2O) 2] 2−, two terbium atoms are connected by four bidentate bridging carboxylate groups. Each Tb atom is eight-coordinated to four bidentate bridging carboxylate groups, one bidentate chelating carboxylate groups, one monodentate carboxylate group as well as one water molecule. The mono-protonated phen does not coordinate to the Tb atom directly. Hydrogen bonds, π–π stacking interactions and electrostatic attractions result in the formation of a two-dimensional supramolecular structure. The solid-state luminescence behavior of 1 was studied. Compared with binary terbium salicylate Tb(Hsal) 3(H 2O) 2·2H 2O, it emits a relatively weak green light under the excitation of UV light, which may be attributed to the formation of extensive π-electron conjugation systems in the structure.

Synthesis, characterization, and crystal structures of three new divalent metal carboxylate-sulfonates with a layered and one-dimensional structure.

Hydrothermal reactions of 5-sulfoisophthalic acid (HO(3)SC(6)H(3)-1,3-(CO(2)H)(2), H(3)L) with M(II) carbonate (or oxide) and 4,4'-bipyridine (4,4'-bipy) (or 2,2'-bipyridine, 2,2'-bipy) resulted in three new metal carboxylate-sulfonate hybrids, namely, [CdL(H-4,4'-bipy)] (1) and [Cd(3)L(2)(2,2-bipy)(4)(H(2)O)(2)].2H(2)O (2) with layered structures and [ZnL(H-4,4'-bipy)(H(2)O)].2H(2)O (3), whose structure features a one-dimensional double chain. The cadmium(II) ion in complex 1 is seven-coordinated by five carboxylate oxygen atoms and one sulfonate oxygen atom from four ligands and a unidentate 4,4'-bipyridine. The interconnection of the cadmium(II) ions through bridging carboxylate-sulfonate ligands resulted in the formation of a <002> double layer with the bipyridyl rings orientated toward the interlayer space. Complex 2 has a different layered structure. Cd(1) is seven-coordinated by two bidentate chelating carboxylate groups from two ligands, a bidentate chelating 2,2'-bipy and an aqua ligand, and Cd(2) is octahedrally coordinated by two bidentate chelating 2,2'-bipy's, a sulfonate oxygen, and an aqua ligand. The coordination geometry around Cd(3) is similar to that of Cd(1) with the aqua ligand being replaced by an oxygen atom from the sulfonate group. The carboxylate-sulfonate ligand acts as pentadentate ligand, bridging with three cadmium(II) ions. The bridging of cadmium(II) ions through the carboxylate-sulfonate ligands resulted in the formation of <006> and <003> layers; the 2,2'-bipy molecules and [Cd(2)(2,2'-bipy)(2)(H(2)O)] cations are orientated to the interlayer space. Complex 3 features a 1D metal carboxylate-sulfonate double chain along the diagonal of the a- and b-axes. The zinc(II) ion is octahedrally coordinated by four carboxylate O atoms from three ligands, a unidentate 4,4'-bipy, and an aqua ligand. Each pair of zinc(II) ions is bridged by two carboxylate groups from two ligands to form a dimer, and such dimeric units are interconnected by bridging ligands to form a double chain. The sulfonate group of the carboxylate sulfonate ligand remains noncoordinated and forms a number of hydrogen bonds with aqua ligands as well as lattice water molecules.

Syntheses, characterizations and crystal structures of two new lead(II) amino and carboxylate–sulfonates with a layered and a pillared layered structure

Reactions of lead(II) acetate with m-aminobenzenesulfonic acid (H L 1) and 5-sulfoisophthalic acid (H 3 L 2) afforded two new lead(II) sulfonates, Pb( L 1) 2 1 and Pb 2( L 2)( μ 3-OH)(H 2O) 2. In compound 1, the lead(II) ion is eight-coordinated by two sulfonate groups bidentately, two sulfonate groups unidentately and two amino groups from six ligands. Each L 1 ligand is tetradentate and bridges with three Pb(II) ions. The interconnection of the Pb(II) ions via bridging sulfonate ligands resulted in 〈100〉 and 〈200〉 layers. In compound 2, one Pb(II) ion is six-coordinated by a carboxylate group bidentately, by two carboxylate groups unidentately, by a sulfonate oxygen atom and by an OH anion, whereas the other one is six-coordinated by a bidentate chelating carboxylate group, two μ 3-OH anions, a sulfonate oxygen atom and an aqua ligand. The interconnection of irregular PbO 6 polyhedra via carboxylate–sulfonate ligands resulted in the formation of a pillared layered structure with the 2D layer being formed; the lead(II) ions, hydroxyl groups, carboxylate and sulfonate groups and the benzene ring as the pillar agent.