Bipy Molecules Research Articles

Effect of Auxiliary Ligands on the Architectures of Manganese Complexes Constructed by N-Heterocyclic Ligands: Syntheses, Structures, and Properties

Two manganese complexes based on N-heterocyclic ligands, [Mn(bqdca)(2,2'-bipy)(H2O)2]n (1), Mn0.5(4,4'-bipy) (H2O)2?0.5bqdca?2H2O (2) (H2bqdca = 2, 2'-biquinoline-4, 4'-dicarboxylic acid, 2, 2'-bipy = 2, 2'-bipyridine, 4, 4'-bipy = 4, 4'-bipyridine), have been synthesized by hydrothermal methods based on Pearson?s acid-base theory and structurally characterized. In Complex 1, the Mn ions are bridged by bqdca2- anions to form one-dimensional chains, which are further linked by hydrogen bonds to generate a two-dimensional layered structure. In Complex 2, each Mn ion was coordinated by 4, 4'-bipy and water molecules to generate a mononuclear structure accompanied by bqdca2- anion balancing valences. The intermolecular hydrogen bonds can link them to construct a three-dimensional supramolecular structure. The different structures of Complexes 1 and 2 illustrate the great influence of the N-heterocyclic auxiliary ligands on the self-assembly of coordination architectures. 2,2'- bipy and 4,4'-bipy ligands all act as terminal ligands. In addition, Complexes 1 and 2 exhibit the photoluminescent emission at 455 nm and 463 nm, and 455 nm and 465 nm in the solid state, respectively, which may be attributed to intraligand transitions. The redshifts of Complexes 1 and 2 may be due to the ligand-to-metal charge transfer, comparing to the H2bqdca ligand.. KEYWORDS :Crystal structure, Manganese complex, N-Heterocyclic ligand, Photoluminesce.

Design and fabrication of Cu conical (Spiral+Helical) sculptured thin films and their application in SERS

Cu conical (spiral + helical (spiral (3 turns) + helical (2, 12 and 17 turns)) nanostructures were grown on stainless steel mesh (SSM) and glass microscope slide by glancing angle deposition (GLAD). The SSM substrates were used in surface enhanced Raman spectroscopy (SERS) for detection of 4,4′-Bipyridine (4,4′-Bipy) molecules. This design fulfilled the main electromagnetic mechanisms of enhancement of Raman signals, which are near field coupling and the lightning rod effect. The size of the sculptured nanostructures produced on the SSM substrates matched the wavelength of the laser beam of the Raman spectrometer and satisfied the requirements for the enhancement of the surface Raman spectroscopy of the 4,4′-Bipy molecules. A comparison is made on the morphology of the produced nanostructures on SSM, microscope slide and previously published works on other surfaces with the view to different surfaces with different surface roughness. Field emission scanning electron microscope (FESEM) analysis of the samples clearly revealed the morphology of the designed and fabricated nanostructure as conical (spiral + helical) features on both SSM and glass substrates. Crystal structures and optical spectra of the produced samples obtained using grazing angle incident x-ray diffraction (GIXRD) and Vis-NIR spectroscopy. The SERS results showed that although according to the GIXRD data the coated Cu films were oxidized, good enhancement is obtained. Hence, this can be considered as a favor to the applied fields of these samples. Vis-NIR results showed that as the number of turns of the helical part of the structure increased, the absorption of the spectra increased consistent with the discrete dipole approximation (DDA) results reported in the literature. Surface-enhanced Raman spectroscopy results of this work when compared with the available published data showed higher/comparable enhancement irrespective of the type of material used (e.g., Ag, Au and Mn), 4,4′-Bipy concentration, Bipy substrate shape, the method of fabrication and the excitation wavelength of the Raman spectrometer.

A new route for the syntheses of coordination polymers using magnetic influence: syntheses, crystal structures and fluorescence properties.

Five coordination polymers [TM1(absa)(H2O)4]n and [TM2(absa)(bipy)(H2O)]n [TM1 = Zn (1), Co (2); TM2 = Zn (3), Co (4), Cu (5); Na2absa = 5,5'-azobissalicylic acid disodium salt; bipy = 4,4'-bipyride] were synthesized by solvent evaporation under a magnetic field. It is evident that magnetic fields bring significant and noticeable changes to the absa2- ligand orientation and the component movement behaviors to construct coordination polymers. The absa2- ligands bind to the metal ions in bridging coordination mode through the carboxylate groups, in addition to the bipy molecules adopting bridging modes. Photoluminescence measurements indicate that the emissions of compounds 1-5 are at 626, 600, 632, 658 and 682 nm in the solid state, respectively.

Stable tetranuclear copper cage as efficient heterogeneous catalyst for C−C and C−N bond forming reactions

Two tetranuclear copper cages with tubular type, [Cu4(BMBA)4((CH3)2N)2(H2O)2] (1) and [Cu4(BMBA)4(Bipy)(H2O)2] (2), were successfully constructed by the reaction of Cu(NO3)2 with dicarboxylic acid 4,4′-[(ethylazanediyl)bis(methylene)]-bis[(1,1′-biphenyl)-2-carboxylic acid] (H2BMBA) under solvothermal conditions. The complexes 1 and 2 exhibit a similar cage structure, formed by four ligands connecting two binuclear copper paddle-wheel secondary building units (SBUs). Interestingly, the complex 2 was obtained by appropriately binding of 4, 4′-bipyridine (Bipy) molecule on the axial positions of two Cu paddle-wheels inside the cage. For this reason, the complex 2 exhibits excellent stability in some common organic solvents at room temperature and aqueous solutions with a pH of 2 to 12. Upon thermal activation of complex 2, the coordinated water molecules can be removed, and its exposed metal active-sites show Lewis acid character, which can be used an efficient heterogeneous catalysis of Knoevenagel condensation (CC) and Clauson-Kaas (CN) reactions.

Synthesis and Structures of Lead(II) Complexes with Hydroxy-Substituted Closo-Decaborate Anions

Mixed-ligand lead(II) complexes with 2,2′-bipyridyl and [B10H9OH]2− or monosubstituted hydroxy-substituted closo-decaborate anions with a pendant hydroxy group, separated from the boron cage by an alkoxylic spacer of different lengths [B10H9O(CH2)xO(CH2)2OH]]2− (x = 2 or 5) have been synthesized. Compounds have been characterized by IR and multinuclear NMR spectroscopies. The structures of binuclear complex [Pb(bipy)2[B10H9OH]]2·CH3CN (1·CH3CN), mononuclear complex [Pb(bipy)2[B10H9O(CH2)2O(CH2)2OH]]·0.5bipy·CH3CN (2·0.5bipy·CH3CN), and polymeric complex [Pb(bipy)[B10H9O(CH2)5O(CH2)2OH]]n (3) have been determined by single-crystal X-ray diffraction. In all three compounds, the co-ordination polyhedra of lead(II) are formed by N atoms from two bipy molecules, O atoms of the substituent attached to the boron cage, and BH groups of the boron cage.

Highly sensitive fluorescent sensing and photocatalytic degradation performance of two-dimensional Tb-organic network

A novel tetra-nuclear Tb-organic network, named as [Tb4(2-pyia)6(HAc)0.5(2,2′-bipy) (H2O)4.5]·2,2′-bipy·H2O (1), was synthesized hydrothermally based on 5-(pyridin-2-ylmethoxy) isophthalic acid (H2pyia) and 2,2′-bipyridine (2,2′-bipy) ligands, and characterized by single crystal X-ray diffraction, thermogravimetric (TG) analyses, powder X-ray diffraction (PXRD) and infrared (IR) technology. 1 possesses a two-dimensional network based on the tetra-nuclear inorganic building units, and the π-π stacking interactions between the pyia2− ligands and the guest 2,2′-bipy molecules play an important role in the forming of 3D supramolecular structure. 1 exhibits excellent fluorescent sensing performance for Fe3+ (1.26 × 10−8 mol/L), Cr2O72− (8.1 × 10−7 mol/L), 2,4,6-trinitrophenol (TNP) (2.71 × 10−8 mol/L) and tetracycline (TCT) (2.76 × 10−7 mol/L) in aqueous solution with lower detection concentrations. The sensing mechanisms of 1 were investigated by density functional theory (DFT) calculations, ultraviolet–visible (UV-Vis) diffuse reflectance spectroscopy, PXRD and fluorescent lifetime analyses. The activated product of 1 was prepared by heating at 255 °C under constant pressure and used to photo-catalytically degrade TCT. Both 1 and the activated one have good photocatalytic degradation performance for TCT with degradation rates of 84.29% and 96.07%, respectively. The photocatalytic mechanisms were discovered by UV–Vis diffuse reflectance spectroscopy and radical trap experiments. The Tb-organic framework might be an excellent multifunctional fluorescent sensor and a good photocatalytic agent for TCT degradation in the future.

Hydrophobicity‐induced DNA, BSA binding, and biomaterial applications of a heteroleptic Cu(II) complex

Herein, we report a new Cu(II) complex [Cu(L)(2,2′‐bipy)](ClO4) obtained from a N,N,O donor Schiff base ligand, 2‐methoxy‐6‐((piperidin‐2‐ylmethylimino)methyl)phenol (HL), and 2,2′‐bipyridine. The title complex has been characterized using FTIR, electronic (UV–Vis), electrospray ionization mass spectrometry (ESI‐MS), and single‐crystal X‐ray studies. The crystallographic studies support the chemical formula, [Cu(L)(2,2′‐bipy)](ClO4), where the metal is coordinated by the deprotonated ligand L through N,N,O atoms and by a 2,2′‐bipy molecule chelating through the N donors. Thus, the studied complex attains penta‐coordinated distorted square pyramidal geometry with ON4 atomic environment. The existence of various non‐covalent interactions such as van der Waals, hydrogen bonding, and hydrophobic interactions that are very common in protein–small molecule interaction has been identified in the present complex from Hirshfeld surface analysis. This has provoked us to examine the nature of interactions of the studied complex with DNA and BSA protein by combined theoretical and experimental approaches. The experimental results reveal the strong binding ability of the complex to CT‐DNA by the mode of partial intercalation and to BSA by the hydrophobic manner. Apart from this, the molecular docking methodology that is used as theoretical tool in the present study also supports the binding ability and binding site of the complex inside the DNA and BSA protein. Moreover, cytotoxicity of the complex has been checked against SiHa cancer cell representing the biocompatibility of the complex and signifying its use as biomaterial transplant.

Synthesis and crystal structure of poly[[bis-(aqua-κO)tetra-kis-(μ-4,4'-bi-pyridine-κ2 N:N')hexa-kis-(3-chloro-benzoato)-κ5 O;κ2 O:O'-tricobalt(II)] methanol disolvate

A novel ladder-chain cobalt(II) coordination polymer, {[Co3(C7H4ClO2)6(C10H8N2)4(H2O)2]·2CH3OH} n , was synthesized and characterized. The structure contains two CoII centres with different octa-hedral environments, [Co(1)N3O3] and [Co(2)N2O4]. The O-donating 3-chloro-benzoate anions (3-Clbenz) act as the terminal ligands, while the N-donating 4,4'-bipy mol-ecules play the role of linkers. The Co(1) ions are linked by 4,4'-bipy mol-ecules into linear chains. Two such chains are joined by [Co(2)(3-Clbenz)2(H2O)2] units via two 4,4'-bipy bridging ligands, thus forming the ladder-chain structure. The crystal packing of the title compound is stabilized by supra-molecular inter-actions, such as hydrogen bonding, π-π and halogen⋯π contacts, giving a three-dimensional framework. The spectroscopic and thermal properties of the title compound have also been investigated.

Preparation, characterization, and photoluminescent and semiconductive properties of an iron compound

One iron compound {[Fe(bipy)3]2(SO3)(OH)4}·14H2O (1) (bipy = 2,2'-bipyridine) has been obtained from a hydrothermal reaction and structurally characterized by single-crystal X-ray diffraction. Compound 1 is characterized by an isolated (0D) structure and the iron center is coordinated by six nitrogen atoms of three bipy molecules to yield an octahedron. Photoluminescence investigation shows that compound 1 displays an emission in the green region. Time-dependent density functional theory (TDDFT) calculation reveals that the photoluminescent emission can be assigned to the ligand-to-metal charge transfer (LMCT) (from the HOMO of the bipy to the LUMO of the iron). Solid-state diffuse reflectance spectra discover that compound 1 features a narrow optical band gap of 1.82 eV, indicating that it is a potential narrow band gap semiconductor.

Investigation of intermolecular interactions between [Ho(H2O)8]4+ based 3D metal-organic supramolecular host and bipyridyl guest through crystal structure and Hirshfeld surface analysis

A new supramolecular metal-organic complex 1, [{Ho(H2O)8}4+(TBTA)(bipy)] (where H2TBTA = tetrabromoterephthalic acid and bipy = 4,4'-bipyridyl), has been synthesized hydrothermally at 100 °C by mixing the reactants in stoichiometric ratio. The complex was characterized by single crystal X-ray diffraction (SC-XRD) along with powder X-ray diffraction (PXRD) and other spectroscopic analyses. Structural analysis reveals that 1 crystallized in the tetragonal space group I4cm and is a mononuclear complex. Ho4+ presents octa-coordinated square antiprism geometry having eight coordinated water molecules. Hydrogen bonding interactions between the coordinated water molecules and carboxylate oxygen atoms of TBTA (doubly deprotonated form of H2TBTA) anions form 3D supramolecular metal-organic host (MOSH) having 2D square grid-like supramolecular channels. Guest bipy molecules get stability within the channels through supramolecular π···π interactions between the bipy and TBTA anions. Hirshfeld surface analysis and corresponding 2D fingerprint plots correlate with the experimental findings. C···C short contact, corresponding to π···π interactions, contributes around 10.7% to the total surface.

Cu(II) coordination polymers with 4,4′-bipyridine. Synthesis and crystal structures

Extensively research has been devoted to the isolation and characterization of Cu(II) coordination polymers. Since many aspects can influence the final crystal structure, the effect of the solvent molecules through intermolecular interactions has been proven to be a determining factor. Herein, we elucidated the structure of two Cu(II) concomitant 1D polymers containing piperonylic acid (HPip) and 4,4′-bipyridine (4,4′-bipy), which were simultaneously crystallized and subsequently isolated changing the synthetic conditions. Complex {[Cu(Pip)2(4,4′-bipy)]}n (1) exhibits zig-zag polymeric chains while {[Cu(Pip)2(4,4′-bipy)(H2O)]•1/2(4,4′-bipy)•(DMF)}n (2) displays linear polymeric chains stacked by water•••carboxylate intermolecular interactions, forming voids occupied by alternated guest 4,4′-bipy and DMF molecules.

The Structure and Properties of Fe(II) 1,10-Phenanthroline-Thiobarbiturate

The structure of the mononuclear complex [Fe(Bipy)(H2O)2(Htba)2]∙6H2O (I), where Bipy – 2,2’-dipyridine, H2tba – 2-thiobarbituric acid (C4H4N2O2S), was determined by single crystal X-ray diffraction technique (cif-file CCDC No. 1831367). Crystals I are rhombic: a = 17.4697 (7), b = 11.7738 (4), c = 13.4314 (5) Å, V = 2762.6(2) Å3, space group Pnma, Z = 4. Two nitrogen atoms of the Bipy molecule and two water molecules are located in the equatorial plane of the octahedral complex, and two S-coordinated Htba− ions the axial positions are occupied. The structure is stabilized by N−H∙∙∙O, O−H∙∙∙O, С−H∙∙∙O, C−H∙∙∙S intermolecular hydrogen bonds and π–π interaction between Bipy and Htba−. The compound is characterized by the methods of powder X-ray diffraction, thermal analysis, and IR spectroscopy

Syntheses, structures and properties of two one-dimensional coordination polymers constructed by phenol-sulfonate ligands and rare earth metal ions

Two new isomorphic and heterogeneous coordination polymers (CPs), namely {[RE (L) (H2O) 2] · (Hbipy) · H2O} n (RE = Yb(1), Y(2), Na2H2L = 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt, bipy = 2,2′-bipyridine) have been synthesized by hydrothermal methods and structurally characterized by elemental analyses, power X-ray diffraction (PXRD) and single crystal X-ray diffraction. Compounds 1 and 2 feature one-dimensional (1D) wavy ladder-like chain structures, which are further connected by hydrogen bonds from water molecules to result in two-dimensional (2D) layered structures. The 1H-protonated bipy molecules act as uncoordinated cations, leading to valences of zero in compounds 1 and 2. Compounds 1 and 2 emit luminescence at 382 nm and 372 nm in the ultraviolet regions, respectively. The luminescent emissions originate from the typical ligand-centered (n–π* and π–π*) transitions. In addition, compound 1 has characteristic near-infrared emission of ytterbium ion at 964 nm.

The first 3, 5, 6-trichloropyridine-2-oxyacetate bridged manganese coordination polymer with features of π⋯π stacking and halogen⋯halogen interactions: Synthesis, crystal analysis and magnetic properties

A new coordination polymer [Mn(3, 5, 6-tcpa)2(2, 2′-bipy)]n (1) has been synthesized by the hydrothermal reaction of manganese sulfate hydrate with 3, 5, 6-trichloropyridine-2-oxyacetic acid (3, 5, 6-Htcpa) and 2, 2′-bipyridine (2, 2′-bipy) coligands. The X-ray single-crystal diffraction analysis shows that the MnII center is in deformed octahedral geometry bonded by two pyridyl nitrogen atoms of 2, 2′-bipy molecule and four carboxy oxygen atoms of four different 3, 5, 6-tcpa− ligands. The 3, 5, 6-tcpa− anions play as bidentate bridging-μ2 linkers and connect neighbouring MnII ions together to form the 1D double-stranded chain structure of 1, which displays interesting chair form [Mn2(COO)2] eight-membered rings. 1 is further assembled into 3D network by the co-effects of π⋯π stacking and Cl⋯Cl halogen bonds interactions. In addition, the magnetic characterizations indicated weak antiferromagnetic coupling between MnII centers for 1.

Hydrothermal syntheses, crystal structures, and optical properties of transition metal selenidostannates

New organic–inorganic hybrid selenidostannates [{Mn(2,2′-bipy)2}2(µ2-Sn2Se6)] (1) and [TM(2,2′-bipy)3]2[Sn3Se7]2·(2,2′-bipy)·H2O (TM = Co (2), Ni (3); 2,2′-bipy = 2,2′-bipyridine) were prepared under hydrothermal conditions. In 1, two edge-sharing [SnSe4] tetrahedra condense to form a dimeric [Sn2Se6]4– unit. The [Sn2Se6]4– unit is a tetradentate chelating ligand via four terminal Se atoms to join two unsaturated [Mn(2,2′-bipy)2]2+ complexes, forming a neutral complex [{Mn(2,2′-bipy)2}2(µ2-Sn2Se6)]. Compounds 2 and 3 consist of extended [Sn3Se7]2– selenidostannate anions, octahedral [TM(2,2′-bipy)3]2+ complex cations, and 2,2′-bipy and H2O molecules. The structural features of 2 and 3 are coexistence of both 1-D and 2-D polymeric anions. The 1-D chain is constructed by interconnection of the secondary building units (SBUs) Sn3Se9 via sharing two Se atoms, while the 2-D layer is constructed by Sn3Se10 SBUs via sharing three Se atoms. Compounds 1–3 exhibit narrow semiconducting band gaps varying in the range of 1.95–2.14 eV. Compound 2 displays higher photocatalytic activity than 1 on the degradation of crystal violet in water under visible irradiation.

Fluorescent Properties of Three Carboxyarylphosphonate Polymers with Unusual Polynuclear Zinc(II) Units

Three novel carboxyarylphosphonate polymers {[Zn2(PCP)(H2PCP)(phen)2]·H2O}n (1), [Zn(HPCP)(4,4′‐bipy)]n (2), and [Zn3(MCP)2(2,2′‐bipy)]n (3) [PCP3– = p‐O2C(C6H4)CH2PO33–, MCP3– = m‐O2C(C6H4)CH2PO33– and phen = phenanthroline] were synthesized and characterized by single‐crystal X‐ray diffraction. Compound 1 features a butterfly‐shaped dimer consisting of [Zn4P4O10] tetranuclear units, which are further linked by hydrogen bonds and π–π stacking interactions into a 3D supramolecular framework. In 2, there is an infinite P–O–Zn inorganic 2D (4,4) layer with the phosphonate moieties of HPCP2– and unidentate 4,4′‐bipy ligands vertically sticking out. As for 3, the novel [Zn6P4O12] hexanuclear units with “chair“ conformation are tetrahedrally bridged by eight MCP3– to generate a 2D double‐layer, in which the windows are occupied by 2,2′‐bipy molecules. Additionally, 2D correlation analysis of FTIR with thermal perturbation of 3 were discussed. Compounds 1–3 exhibit intense solid state fluorescent emissions. Thermogravimetric analyses suggested the very high stability.

A Binuclear Cadmium(II) Cluster Based on π···π Stacking and Halogen···Halogen Interactions: Synthesis, Crystal Analysis and Fluorescent Properties

An interseting binuclear complex [Cd2(tcpa)4(bipy)2] (1) has been hydrothermally synthesized with 3, 5, 6-trichloropyridine phenoxy acetatic acid (Htcpa) and 2, 2′-bipyridine (bipy) coligands. The X-ray single-crystal diffraction analysis shows that the CdII center is situated on unusual triangular prismatic geometry formed by two pyridyl nitrogen atoms of a bipy molecule and four carboxyl oxygen atoms of four different tcpa− ligands. The four tcpa− anions play as bis-monodentate linkers and connect two CdII ions together to form the dimer structure of 1. 1 is further assembled into a 2D layer by the co-effects of π···π stacking and Cl···Cl halogen bonds interactions. Moreover, 1 exhibits intense solid-state luminescence emissions centered at 442 nm at room temperature, which mainly originates from the intraligand π → π* transitions of tcpa−. The CCDC number of 1 is 1,935,091.

Structure of Barbituratobis(2,2'-Dipyridyl)copper(II) Heptahydrate

The structure of the complex [Cu(Bipy)2(BA)] ∙ 7H2O (I), where Bipy is 2,2'-dipyridyl, and BA2– is the barbituric acid anion (H2BA), is determined (CIF file CCDC no. 1887338). The thermal decomposition and IR spectrum of complex I are studied. The crystals are orthorhombic: a = 26.118(3), b = 27.685(3), c = 15.683(2) A, V = 11 370(2) A3, space group Fdd2, Z = 16. The discrete structure of the polar crystal consists of neutral [Cu(Bipy)2(BA)] particles and molecules of crystallisation water . The Cu2+ ion is bound to the N atoms of two bidentate Bipy molecules and the N atom of the BA2− ion at the vertices of the trigonal bipyramid CuN5. Compound I is the first example of the metal complex only with the N-coordinated anions of barbituric acid (BA2−, НBA−). The structure is stabilized by hydrogen bonds O−H∙∙∙O and N−H∙∙∙O to form a three-dimensional network with the π–π interaction between the Bipy molecules. The compound begins to lose water at ~50°С and is completely dehydrated above 200°С.

A series of new oxo-vanadium(IV) complexes with octahedral coordinated vanadium centers

A series of new oxo-vanadium(IV) complexes, [VOCl0.69(OH)0.31 (2,2′-bipy)2]Cl·2H2O (1, 2,2′-bipy = 2,2′-bipyridine) [(VO)2Cl4(4,4'-bipy)3 (H2O)2] (2, 4,4'-bipy = 4,4'-bipyridine), [VO(ida)(H2O)]n (3, H2ida = iminodiacetic acid), and [(VO)2(oa)4]n·4n(H3O)·n(H2O) (4, H2oa = oxalic acid), have been synthesized and structurally characterized. 1 contains a [VOCl0.69(OH)0.31(2,2′-bipy)2]+ cation, Cl – anion and two free H2O molecules. 2 exhibits a binuclear centrosymmetric moiety built up from two [VOCl2(4,4'-bipy)(H2O)] units and one bridging 4,4'-bipy ligand, which provides a rare example of a 4,4'-bipy molecule acting as monodentate ligand. 3 displays a neutral chain [VO(ida)(H2O)]n constructed by the linkages of [VO(H2O)]2+ units and ida2− bridging ligands, while 4 offers the only example of three kinds of oa2- ligands coexisting within the same anionic chain [(VO)2(oa)44-]n. Their spectroscopic properties were investigated, and the magnetic susceptibility of 4 shows antiferromagnetic behavior.

Structure of bis(2-Thiobarbiturate)Tris (2,2-Bipyridyl)Nickel(II) Hexahydrate

The [Ni(Bipy)3](Htba)2·6H2O (I) complex (Bipy is 2,2′-bipyridyl, H2tba is 2-thiobarbituric acid) is synthesized and its structure is determined by single crystal XRD (cif-file CCDC No. 1836529). The crystals of I are monoclinic: a = 13.6618(6) A, b = 23.9441(9) A, c = 25.4335(8) A, β = 93.091(1)°, V = 8307.7(5), space group P21/c, Z = 8. Via multiple intermolecular N–H⋯O, O–H⋯O, and C–H⋯S hydrogen bonds (HBs), the Htba− ions and water molecules form channels within which [Ni(Bipy)3]2+ cations are located. The Bipy molecules and the Htba− ions are involved in C–H⋯O HBs and the π−π interaction. The results of the thermal analysis and IR spectroscopy agree with the single crystal XRD data.