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Three novel N 4 -cavity Cu(II), Ni(II) and Zn(II) complexes were successfully synthesized via the reactions of a novel pyridine-containing N 4 -cavity bisoxime ligand L. All three complexes are monoclinic systems. Complexes 2 and 3 form centrosymmetric helical molecules. Complexes 1 – 3 have been characterized by elemental analysis, IR, UV–Vis spectroscopy and single crystal X-ray crystallography. In addition, supramolecular interactions, Hirshfeld surface analysis to analyze the crystal properties have been studied. [Display omitted] • A novel ligand L with N4 cavity was synthesized and characterized. • Three excess metal single crystals were synthesized via the ligand L. • Hirshfeld surface analysis was performed on single crystals. Three novel N 4 -cavity Cu(II), Ni(II) and Zn(II) mononuclear complexes, [Cu(L)(NO 3) 2 ][Cu(L)(NO 3)]NO 3 (1) [Ni(L)(NO 3) 2 ] (2) and [Zn(L)(NO 3) 2 ] (3) were successfully synthesized via the reactions of a pyridine-containing N 4 -cavity bisoxime ligand L (L = 2,2′-[Ethylenedioxobis(azetidinyl)]pyridine) with Cu(II), Ni(II) and Zn(II) nitrates, respectively. Complexes 1 – 3 were characterized via elemental analysis, IR, UV–Vis spectra and X-ray crystallography. All three complexes are monoclinic systems, containing one M(II) atom and one (L) ligand moiety. Complexes 2 and 3 form centrosymmetric molecules. In addition, supramolecular interactions, Hirshfeld surface analysis were used to analyze the crystal properties that have been studied. [ABSTRACT FROM AUTHOR]

[Zn4(L1)2(OAc)2(CH3CH2OH)2] and [CuL2(H2O)] with new asymmetric Salamo-type ligands have been synthesized and characterized. There are two coordination geometries (trigonal bipyramidal and square pyramidal) in the Zn(??) complex, and the Cu(II) complex has square-pyramidal geometry. A self-assembling continual zigzag chain is formed by intermolecular hydrogen bonds in the Cu(II) complex. The self-assembling array of the Zn(II) complex is linked by intermolecular C–H?O and C–H?? interactions. Blue emissions of the Zn(II) and Cu(II) complexes in DMF solution are exhibited by fluorescence. [ABSTRACT FROM AUTHOR]

A new mononuclear CdIIcomplex, [CdL(H2O)2], with halogen-substituted Salen-type bisoxime ligand (H2L = 4,4′-dibromo- 6,6′-dichloro-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol), was synthesized and structurally characterized. The CdIIcomplex crystallizes in the monoclinic system, space groupC2/c. The CdIIcenter exhibits a slightly distorted octahedral geometry with halogen-substituted Salen-type bisoxime ligand forming the basal N2O2coordination plane and two oxygen atoms from the coordinated water molecules in the axial position. An infinite 1D metal-water chain is formed by intermolecular hydrogen-bonding and π-π stacking interactions of neighboring benzene rings. Supplemental materials are available for this article. Go to the publisher's online edition ofSynthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistryto view the supplemental file. [ABSTRACT FROM AUTHOR]

A supramolecular CoIIcomplex, [CoL(H2O)2], bearing Salen-type bisoxime chelate ligand 4,4′,6,6′-tetrachloro-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol (H2L), has been synthesized and structurally characterized by elemental analyses, IR spectra, UV–vis spectra, and X-ray diffraction techniques. The crystal structure of [CoL(H2O)2] indicates that the CoIIcomplex consists of one CoIIatom, one L2–unit, and two coordinated water molecules. The CoIIcomplex exhibits slightly distorted octahedral geometry with the Salen-type bisoxime ligand forming the basal N2O2coordination plane and two oxygen atoms from the coordinated water molecules in the axial positions. An infinite 1D metal–water chain and 2D supramolecular network structure were formed by intermolecular O-H···O, O-H···Cl, and C-H···O hydrogen bonding and π-π stacking interactions. Supplemental materials are available for this article. Go to the publisher's online edition ofSynthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistryto view the supplemental file. [ABSTRACT FROM AUTHOR]

The tri-nuclear cobalt(II) complex, [(CoL)2(μ-OAc)2Co]·2CHCl3(H2L = 5,5'-dimethoxy-2,2'-[(ethylene)dioxybis(nitrilome thylidyne)]diphenol), has been synthesised. Its X-ray structure shows it to contain two acetate ions coordinating to the three cobalt(II) atoms through Co-O-C-O-Co bridges, and four μ-phenoxo-oxygen atoms from two [CoL] chelates also coordinating to the central cobalt(II) atom. The complex possesses two penta- and one hexa-coordinated cobalt atoms. The crystal packing of the CoII complex shows that a 2D-layer supramolecular network parallel to the ab-plane is formed through intermolecular C-H···O and C-H···Cl hydrogen bonding interactions. [ABSTRACT FROM AUTHOR]

Two nickel(II) complexes, namely {[NiL(MeOH)(μ-OAc)]2Ni} ·2CH2Cl2 ·2MeOH ( 1) and {[NiL(EtOH)(μ-OAc)]2Ni} ·2EtOH ( 2) {H2L = 5, 5′-dimethoxy-2, 2′-[(ethylene)dioxybis(nitrilomethylidyne)]diphenol}, were synthesized and structurally characterized. Two trinuclear NiII complexes are both hexacoordinate around the central NiII atoms, showing octahedral coordination arrangements, and each complex comprises three divalent NiII atoms, two deprotonated L2- ligands, in which four μ-phenoxo oxygen atoms forming two [NiL( X)] ( X = MeOH or EtOH) units, and coordinated and non-coordinated solvent molecules. Complex 1 exhibits a 2D supramolecular network through intermolecular O-H ···O, C-H ···O and C-H ···π interactions, whereas complex 2 forms an infinite 1D chain by intermolecular C-H ···O hydrogen bonding interactions. [ABSTRACT FROM AUTHOR]

A new dinuclear CuII complex, [Cu2(3-MeOSalamo-2)(H2O)3]·2pic·CH3COCH3·H2O, has been synthesized by the reaction of copper(II) picrate tetrahydrate with H2(3-MeOSalamo-n) (n = 2). X-ray crystallographic analysis reveals that the complex is a dinuclear structure when the O-alkyl chain length is relatively short (two CH2 groups), while a tetranuclear structure is obtained when the O-alkyl chain length becomes longer (four CH2 groups). In the complex, the μ-phenoxo bridging, picratol, and intermolecular hydrogen bonds play important roles in assembling CuII ions and ligands. Interestingly, the complex not only has a helical chain, but has an infinite metal–water chain supramolecular structure. [ABSTRACT FROM AUTHOR]

Abstract: Mononuclear and trinuclear Cu(II) complexes with chemical formula [CuL]·CH3OH (1) and [{(Cu(μ-L))2(OAc)2}Cu] (2), where H2L=2,2′-[1,1′-(ethylenedioxydinitrilo)diethylidyne]diphenol, have been synthesized and characterized by elemental analyses, 1H NMR, IR and UV–vis spectra et al. Crystallographic data of complex 1 reveal the formation of an asymmetric mononuclear structure and a slight distortion toward tetrahedral geometry from the square planar structure, in which the introduction of the non-coordinated methanol molecule lead to the assembly of the 1D chains by hydrogen bonding, Cu⋯π and π⋯π interactions. Complex 2 have the elongated square pyramidal geometries for the two terminal Cu(II) ions and an octahedral coordinated geometry for the central Cu(II) ion. In complex 2, two acetate ions coordinate to three Cu(II) ions adopting a familiar syn–syn (μM-O-C-O-M) coordinated fashion. The central Cu(II) ion sits in a crystallographic inversion centre. Therefore, the whole molecule of complex 2 is rigorously centrosymmetric, and forms a 3D supramolecular networks through intermolecular C–H⋯O and C–H⋯π interactions. [Copyright &y& Elsevier]

Abstract: Four supramolecular complexes [MnL1(H2O)2] (1), {[CoL2(OAc)(H2O)]2Co}·5CH3CH2OH (2), {[NiL3(OAc)(CH3OH)]2Ni}·2CH3COCH3·2CH3OH (3) and {[ZnL2(OAc)]2Zn}·CHCl3 (4), have been synthesized and characterized by elemental analyses, IR, UV–Vis spectra and X-ray diffraction techniques. All the complexes have the trinuclear configuration except for MnII complex being mononuclear configuration. Every trinuclear complex contains two acetate ions coordinate to the three metal ions via a familiar M–O–C–O–M (M=Co, Ni, Zn) coordinated mode. Although complexes 1 and 3 display 1D supramolecular chains, the different coordination environments (mononuclear in 1, trinuclear in 3) provoke divergence in the structures and aggregations of the chain subunits. Complex 2 forms a 3D hydrogen-bonding supramolecular networks possessing a channel composing of six O–H···O hydrogen bonds, while complex 4 exhibits a 2D hydrogen-bonding supramolecular networks with the formation of “grottos” occupied by chloroform molecules through intermolecular hydrogen-bond interactions. The spectral properties of the title complexes have been further discussed in detail. [Copyright &y& Elsevier]

Abstract: Three new supramolecular complexes, [Cu(L1)H2O] n (1), [Zn(L2)(H2O)2] n (2), and [Cd(L2)(H2O)2] n (3), have been synthesized and characterized by FT-IR spectra, fluorescence spectra, and thermal analyses. And the structures of complexes 1–3 have been elucidated by X-ray analyses. Complex 1 is square pyramidal geometry with an unusually long bond (2.262Å) from penta-coodinated CuII center to the oxygen atom of the apical coordinated water molecule. Molecules are linked by hydrogen bonding between the coordinated water and the phenolic oxygen atoms of adjacent molecules, thus formed a self-assembling continual zigzag chain supramolecular structure. The crystal structure of complex 2 (or 3) has indicated that the complex consists of one ZnII (or CdII) atom, one L2− unit and two coordinated water molecules, the coordination number of the ZnII (or CdII) atom is six, and formed an infinite metal–water chain supramolecular structure by intermolecular hydrogen bonds and π–π stacking of neighboring benzene rings. Meanwhile, the thermal and photophysical properties of the resulted complexes have also been discussed. [Copyright &y& Elsevier]

A new Cu(II) complex with asymmetric Salamo-type ligand (H2L, 4-bromo-6′-ethoxy-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol) has been synthesized and characterized structurally. The X-ray crystal structure of the Cu(II) complex shows it to be a binuclear complex, in which each Cu(II) atom is in a distorted square-pyramidal geometry. The Cu(II) complex crystallizes in the monoclinic system, space groupP21/c, with unit cell parametersa= 14.7109(1),b= 8.6254(7),c= 30.124(3) Å, β = 100.7400(1), andZ= 4. The Cu(II) complex consists of two Cu(II) atoms, and two L2–units, and each Cu(II) complex molecule links four other molecules into an infinite 2D-layer supramolecular structure. Meanwhile, the Cu(II) complex exhibits emission with the maximum emission wavelength λmax= 443 nm when excited at λex= 340 nm. [ABSTRACT FROM PUBLISHER]

Highlights: [•] A halogen-substituted Salen-type bisoxime has been synthesized firstly. [•] A new complex [ZnL(H2O)2] n has been synthesized and characterized structurally. [•] The complex forms a self-assembling infinite dual metal–water chain-like structure. [•] Some new results are very important to coordination and supramolecular chemistry. [ABSTRACT FROM AUTHOR]

A supramolecular CuII complex, [Cu(L)(H2O)] (H2L: 4,4′,6,6′-tetrachloro-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol), has been synthesized and structurally characterized. X-ray crystallographic analysis shows that the complex is a centrosymmetric mononuclear CuII complex, and the CuII atom is penta-coordinated by two phenolic O atoms and two oxime N atoms from the deprotonated Salen-type ligand, and one oxygen atom from the coordinated water molecule. A self-assembling continual supramolecular structure is formed by intermolecular O3-H3···O2 and O3-H3···Cl1 hydrogen bonds. [ABSTRACT FROM AUTHOR]

A new Salen-type bisoxime chelating ligand, 3,3′-dimethoxy-2,2′-[(1,3-propylene)dioxybis(nitrilomethylidyne)]diphenol (H2L), and its Ni(II) cluster, [{NiL(CH3CH2OH)}2(OAc)2Ni]·2CH3CH2 OH·CH3COCH3, have been synthesized and characterized by elemental analyses, FT-IR spectra, UV-vis spectra, 1H-NMR, molar conductance measurements, and thermal properties. X-ray crystallographic analyses reveal that the structure of the Ni(II) cluster is as follows: two acetate groups coordinating to three metal(II) ions through Ni–O–C–O–Ni bridges and four μ-phenoxo oxygen atoms from two [NiL(CH3CH2OH)] units also coordinating to metal(II) ions. In the cluster, two ethanol molecules coordinate to the two terminal nickel(II) ions and form a trinuclear structure. Meanwhile, the Ni–O–C–O–Ni and μ-phenoxo bridges play important roles in assembling metal ions and ligands. [ABSTRACT FROM AUTHOR]

An unexpected dinuclear Cu(II) complex, [Cu2(L2)2] (H2L2 = 3-methoxysalicylaldehyde O-(2-hydroxyethyl)oxime), has been synthesized via complexation of Cu(II) acetate monohydrate with H4L1. Catalysis by Cu(II) results in unexpected cleavage of two N–O bonds in H4L1, giving a dialkoxo-bridged dinuclear Cu(II) complex possessing a Cu–O–Cu–O four-membered ring core instead of the usual bis(salen)-type tetraoxime Cu3–N4O4 complex. Every complex links six other molecules into an infinite-layered supramolecular structure via 12 intermolecular C–H ··· O hydrogen bonds. Furthermore, Cu(II) complex exhibits purple emission with maximum emission wavelength λmax = 417 nm when excited with 312 nm. [ABSTRACT FROM AUTHOR]

A tetranuclear Zn(ΙΙ) complex, [Zn4L2(OAc)2(CH3OH)2] with an unsymmetric Salen-type bisoxime (H3L = 6-hydroxy-4′,6′-dibromo-2,2′-[ethylenediyldioxybis(nitrilomethylidyne)]diphenol), has been synthesized and structurally characterized. There are two kinds of coordination geometry (trigonal bipyramidal and square pyramidal) in the Zn(ΙΙ) complex. The molecule has serious distortion probably from the asymmetry. The complex exhibits blue emission with the maximum emission wavelength λ max = 423 nm when excited with 340 nm. [ABSTRACT FROM AUTHOR]

An unprecedented dinuclear copper(II) complex, [Cu2(L2)2] (H2L2 = 3-Methoxysalicylaldehyde O-(2-hydroxyethyl)oxime), has been synthesized via the complexation of copper(II) acetate monohydrate with unsymmetrical Salen-type ligand H2L1 (H2L1 = 3-Methoxy-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol). The crystal structure of the copper(II) complex has been determined by single-crystal X-ray diffraction method. The catalysis of copper(II) ions results in the unexpected cleavage of one of the N˭O bonds in the ligand H2L1, giving a novel dialkoxo-bridged dinuclear copper(II) complex possessing a Cu˭O˭Cu˭O four-membered ring core instead of the usually desired Salen-type bisoxime Cu˭N2O2 mononuclear complex. [ABSTRACT FROM AUTHOR]

Two solvent-induced complexes, [CoL2(CH3OH)2] (1) and [CoL2(CH3CH2OH)2] (2), have been synthesized by the reaction of an oxime-type ligand (HL, 4-[(Ethoxyimino)(phenyl)methyl]-5-methyl-2-phenyl-1H-pyrazol-3(2H)-one) with cobalt(II) acetate tetrahydrate in different solvents. X-ray crystallographic analyses have indicated that complexes 1 and 2 have a similar structure, consisting of one CoII atom, two L− units, and two coordinated methanol or ethanol molecules. Interestingly, two CoII atoms in the structures of complexes 1 and 2 are all six-coordinated, approaching a staved octahedral geometry, but complexes 1 and 2 are grown up in methanol/chloroform and ethanol, respectively. Right because of this, solvent effect cause to the difference of the crystal structures: complex 1 forms an infinite supramolecular chain by intermolecular hydrogen bonds, while complex 2 exhibits three-dimensional supramolecular networks through intermolecular hydrogen bonds and C-H···π interactions. [ABSTRACT FROM AUTHOR]

A new Co(II) cluster, {[CoL(DMF)]2(OAc)2Co}·2DMF (H2L = 4,4'-dichloro-2,2'-[(1,3-propylene)dioxybis (nitrilomethylidyne)]diphenol), has been synthesized and characterized by elemental analysis, IR spectrum, UV-Vis spectrum, and X-ray diffraction method. The results indicate that the Co(II) cluster consists of three Co(II) ions, two tetradentate (μ-L)2- units, two coordinated μ-acetate ions, two coordinated DMF, and two crystallizing DMF molecules. All the hexa-coordinated Co(II) ions of the Co(II) cluster have a slightly distorted octahedral geometry. The crystal packing of the Co(II) cluster shows that a notable feature of this structure resides in the formation of a novel 2D supramolecular structure through intermolecular C-H···O interaction and weak intramolecular C-H···(Ph) interaction along the b-axes. [ABSTRACT FROM AUTHOR]

Three mononuclear Schiff base copper(II) complexes, [Cu(L1)2] (1), [Cu(L2)2] (2) and [Cu(L3)2] (3) (HL1= 2,4-dichloro-6-[(2-chloro-3-pyridyl)iminomethyl]phenol, HL2 = 2,4-dibromo-6-[(2-chloro-3-pyridyl)-iminomethyl]phenol, HL3 = 2-bromo-4-chloro-6-[(2-chloro-3-pyridyl)iminomethyl]phenol), have been synthesized and characterized by elemental analyses, IR, UV-Vis spectra, and X-ray single crystal diffraction. X-ray structures reveal each crystal unit contains two molecules and the coordination environment around the copper(II) atom is tetracoordinated by two Schiff base ligands, showing a tetrahedron geometry with some distortion. Pairs of intermolecular C-H···X (X = Cl or Br), C-H···N and C-H···O hydrogen bonds form many hydrogen bonding rings and play a crucial role in stabilizing the crystal structures. [ABSTRACT FROM AUTHOR]

Two new complexes, [Cu(L1)2] (1) and [Cu(L2)2(H2O)]·CH3OH (2), have been synthesized via the complexation of copper(II) acetate monohydrate with two mono-oxime chelating ligands (HL1: 4-[(Methoxyimino)(phenyl)methyl]-5-methyl-2-phenyl-1H- pyrazol-3(2H)-one and HL2: 4-[(Ethoxyimino)(phenyl)methyl]-5-methyl-2-phenyl-1H-pyrazol-3(2H)-one), respectively. X-ray crystal structure determination of the two complexes show that complex 1 consists of one copper(II) ion, two bidentate (L1)- units, and the copper atom of complex 1 has a square planar geometry distorted tetrahedrally with four-coordination, while complex 2 consists of one copper(II) ion, two bidentate (L2)- units, one coordinated H2O, and one crystallizing methanol molecule, as expected from the analytical data. And the copper atom of complex 2 has a slightly distorted tetragonal pyramid geometry with five-coordination. Complex 2 is a self-assembling infinite chain supramolecular structure formed by intermolecular hydrogen bonds. Meanwhile, the photophysical properties of the resulted complexes have also been discussed. [ABSTRACT FROM AUTHOR]

Abstract: Two solvent-induced trinuclear nickel(II) clusters, [{NiL(CH3OH)}2(OAc)2Ni]·2CH3OH (I) and [{NiL(C2H5OH)}2(OAc)2Ni]·2C2H5OH (II), have been synthesized by the reaction of a new Salen-type bisoxime chelating ligand of 5,5′-di(N,N′-diethylamino)-2,2′-[(1,3-propylene)dioxybis(nitrilomethylidyne)]diphenol (H2L) with nickel(II) acetate tetrahydrate in different solvents. Clusters I and II were characterized by elemental analyses, IR spectra, UV–vis absorption spectra, TG–DTA and X-ray diffraction methods. In clusters I (or II), there are two ligand moieties (which provide N2O2 donors), two acetate ions, two coordinated methanol (or ethanol) molecules and two crystallizing methanol (or ethanol) molecules, which result in the formation of three slightly distorted octahedral geometries around Ni(II) ions. Interestingly, nickel(II) ions in the structures of clusters I and II are all six-coordinated geometry, but clusters I and II are grown up in different solvent. Right because of this, solvent effect cause to their different crystal structures. [Copyright &y& Elsevier]

Abstract: An unprecedented linear supramolecular manganese(III)-lithium(I) coordination polymer, [MnIIIL(OH)2LiI] n , has been prepared and structurally characterized. The polymer is a one-dimensional infinite Mn(III)–O–Li(I) chain supramolecular structure formed by intermolecular O–H···O and O–H···Cl hydrogen bonds and π–π stacking of neighboring benzene rings. [Copyright &y& Elsevier]

Graphical abstract The self-assembling of di-, tri- and tetra-nuclear metal(II) complexes shows propeller, butterfly and windmill type motifs, respectively. In complexes 1 and 2 , the ideal size, shape as well as strong coordination ability of OAc− as an anion significantly stabilize the aesthetic structure, while in complex 3 , the hydroxyl radical of an unexpected ligand H 2 L′, which derived from the cleavage of HL are coordinated with three Co(II) atoms at the same time. Meanwhile, complexes 1 , 2 and 3 possess a self-assembling 2D, 3D and 0D supramolecular structures by abundant noncovalent interactions. Besides, magnetic properties and Hirshfeld surface analyses were discussed. Abstract Two newly di- and tri-nuclear Cu(II) and Ni(II) complexes constructed from a half-salamo chelating ligand (HL: 2-[ O -(1-ethyloxyamide)]oxime-6-methoxyphenol), [Cu 2 (L) 2 (μ-OAc) 2 ] (1) and [{Ni 3 (μ-OAc) 2 (L) 2 (OAc) 2 ]·CHCl 3 (2), and one tetranuclear Co(II) complex [Co 4 (L′) 4 (MeOH) 4 ] (3) based on an unexpected ligand H 2 L′ derived from the cleavage of HL have been synthesized and characterized by elemental analyses, IR, UV–vis spectra, and single crystal X-ray diffraction analyses. The single crystals of complexes 1 , 2 and 3 in the process of synthesis are obtained through different routes. The complex 1 includes two Cu(II) atoms, two completely deprotonated (L)− units and two μ-acetate ions, which displays a propeller-type motif. The complex 2 contains three Ni(II) atoms, two completely deprotonated (L)− units, two μ-acetate ions, two chelating acetate ions and one crystallizing chloroform molecule, the crystal structure of complex 2 reveals a butterfly-type motif. The complex 3 is made up of four Co(II) atoms, four completely deprotonated (L′)2− units (HL′: 2-[ O -(1-hydroxyethyl)]oxime-6-methoxyphenol) and four coordinated methanol molecules, which shows a windmill-type motif. Besides, magnetic properties and Hirshfeld surface analyses were discussed. [ABSTRACT FROM AUTHOR]

Heterotrinuclear 3d–4f complexes with a naphthalenediol-based acyclic bis(salamo)-type ligand have been synthesized and structurally characterized. Spectral titrations clearly show that the heterotrinuclear complexes [Zn 2 (L)La(OAc) 3 ] ( 1 ), [Zn 2 (L)Ce(OAc) 3 ] ( 2 ) and [Zn 2 (L)Dy(OAc) 3 (CH 3 OH)]·CH 2 Cl 2 ( 3 ) are acquired by the substitution reaction of the obtained homotrinuclear Zn(II) complex with 1 equiv. of Ln(NO 3 ) 3 (Ln 3 + = La 3 + , Ce 3 + and Dy 3 + ). Two Zn(II) ions are penta- and hexa-coordinated with geometries of distorted tetragonal pyramid and octahedron. La(III) ion is deca-coordinated, adopting a distorted bicapped square antiprism geometry. Ce(III) ion is nona-coordinated with geometry of distorted capped square antiprism as well as Dy(III) ion. The different coordination modes of acetate ions in complexes 1 , 2 and 3 lead to different coordination numbers of the lanthanide(III) ions. Furthermore, the structures and fluorescence properties have been discussed. [ABSTRACT FROM AUTHOR]

Two novel mono- and heptanuclear Ni(II) complexes, [Ni(HL 1 ) 2 (EtOH) 2 ]·2EtOH ( 1 ) and [Ni 7 (L 2 ) 3 ( μ 3 -OMe) 2 ( μ 3 -OH) 6 (MeOH) 6 ] ( 2 ), have been synthesized by the reaction of Ni(II) acetate with H 2 L 1 and H 2 L 2 , respectively. In the Ni(II) complex 1 , the ligand H 2 L 1 was partially deprotonated, only NO donor atoms of one salicylidene moiety of the (HL 1 ) − unit coordinate to Ni(II) atom. While all the three H 2 L 2 ligands in the Ni(II) complex 2 were completely deprotonated. The seven Ni(II) atoms are all hexa-coordinated, and have two coordination environments. The fluorescence properties of the ligands, the Ni(II) complexes 1 and 2 have been discussed. [ABSTRACT FROM AUTHOR]

A new mononuclear Zn(II) complex, [ZnL(HOAc)] (1) (H2L = 6,6′-diethoxy-2,2′-[1,2-ethylenedioxybis(nitrilomethylidyne)]diphenol), was synthesized by reaction of H2L and Zn(II) acetate under solvothermal conditions. Complex1acts as a metallohost possessing a pentadentate O5donor. Complex1molecules bonded to one Sr(II) or Ba(II) form two new hetero-trinuclear complexes, [(ZnL)2M(OAc)2] (M = Sr (2), Ba (3)). In2and3, Zn(II) ions are 5-coordinate, but the Sr(II) or Ba(II) ion is 10-coordinate by fourμ-phenolic oxygens from two L2−units, four oxygens from four ethoxy groups and two oxygens from twoμ-acetato ligands. Furthermore,1–3exhibit blue emissions with the maximum emission wavelengthsλmax = 477, 500, and 471 nm when excited at 360 nm. [ABSTRACT FROM PUBLISHER]