Unusual constructions of two Salamo-based copper(II) complexes

Wang, Fei; Liu, Ling-Zhi; Gao, Lei; Dong, Wen‐Kui

doi:10.1016/j.saa.2018.05.088

Cited by 53 publications

(13 citation statements)

References 67 publications

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“…Salamo was developed on the basis of changing the type of amine of the salen-type compound, and after introducing an O atom to the N atom of the salen-type compound possessing a -RC=N-group, the salamo-type compound is more flexible and stable than the salen-type compound [5]. The salamo-type ligands and their metal complexes, due to their unique physical and chemical properties and potential application values, have attracted more and more attention from chemical researchers [6][7][8][9][10][11][12]. Therefore, the results of research into these complexes in the fields of catalysts [13][14][15], biology [16][17][18][19][20], electrochemical processes [21][22][23][24][25][26][27], supramolecular structures [28][29][30][31][32][33], ion recognitions [34][35][36][37][38][39][40], magnetic materials [41][42][43][44][45][46][47], and luminescence [48]…”

Section: Introductionmentioning

confidence: 99%

A New Half-Salamo-Based Homo-Trinuclear Nickel(II) Complex: Crystal Structure, Hirshfeld Surface Analysis, and Fluorescence Properties

Xiao

Zhao

et al. 2019

Crystals

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A new homo-trinuclear Ni(II) half-salamo-based complex [Ni3(L)2(μ-OAc)2(OAc)2(CH3OH)2]·2CH3OH was synthesized via the reaction of a tridentate ligand HL (2-[O-(1-ethyloxyamide)]oxime-4-bromophenol) and Ni(OAc)2·4H2O, and characterized using elemental analyses, IR spectra, UV-Vis absorption spectra, X-ray crystallography, and Hirshfeld analysis. Interestingly, single-crystal X-ray analysis showed that the two acetate molecules were bonded simultaneously with the Ni(II) atoms by mono-dentate chelating and bidentate bridging coordination modes, respectively, and the resulting hexa-coordinate geometries were ultimately formed. Furthermore, the Hirshfeld analysis of the complex was studied. Compared with HL, the complex fluorescence intensity was significantly lowered, indicating that the Ni(II) ions have fluorescence quenching characteristics.

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Section: Introductionmentioning

confidence: 99%

A New Half-Salamo-Based Homo-Trinuclear Nickel(II) Complex: Crystal Structure, Hirshfeld Surface Analysis, and Fluorescence Properties

Xiao

Zhao

et al. 2019

Crystals

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“…Here, the half-salamo-like ligand HL 1 was converted to a salamo-like ligand H 2 L 2 . This phenomenon of oxime oxygen atom participating in coordination has not been previously reported in the literature [6,9,[11][12][13] and may be due to the catalysis of the Cu II ion upon coordination [16]. Compared with the previously reported M/L as 1:2 [68], 3:2 [69], and 2:2 [70] complexes, it consisted of two Cu II ions and two wholly deprotonated (L 2 ) 2− units.…”

Section: Crystal Structure Descriptionmentioning

confidence: 44%

“…It has been found that these salen-like complexes have various special structures and interesting properties [6][7][8]. In recent years, based on the research of salen and its derivatives, a new salamo-like ligand and its derivatives (R-CH=N-O-(CH 2 ) n -O-N=CH-R) have been developed, as the cavity formed by N 2 O 2 is easier to bind with metal ions [9][10][11][12][13]. When different metal ions are added, mononuclear and multinuclear metal complexes with different structures are expected, which show superior stability and flexibility compared with salen-like compounds [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Unprecedented Dinuclear CuII N,O-Donor Complex: Synthesis, Structural Characterization, Fluorescence Property, and Hirshfeld Analysis

Sun

Pan

et al. 2019

Crystals

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An unprecedented dinuclear Cu II complex, [Cu 2 (L 2 ) 2 ], derived from a salamo-like chelating ligand H 2 L 2 , was produced by the cleavage of a newly synthesized, half-salamo-like ligand HL 1 (2-[O-(1-ethyloxyamide)]oxime-3,5-dichloro-phenol). This was synthesized and characterized by elemental analyses, IR, UV-Vis and fluorescent spectra, single crystal X-ray diffraction analysis, and Hirshfeld surface analysis. X-ray crystallographic analysis indicated that the two Cu II (Cu1 and Cu2) ions bore different (N 2 O 3 and N 2 O 2 ) coordination environments, the penta-coordinated Cu1 ion possessed a slightly twisted tetragonal pyramid geometry with the τ value τ = 0.004, and the tetra-coordinated Cu2 ion showed a slightly twisted square planar geometry. Interestingly, one oxime oxygen atom participated in the coordination reported previously. Moreover, an infinite two-dimensional layered supramolecular network was formed. Compared with HL 1 , the Cu II complex possessed the characteristic of fluorescence quenching.Crystals 2019, 9, 607 2 of 15 complexes, the participation of oxime oxygen atoms of salamo-like ligands in coordination should be constantly emerging.In order to study the structures and properties of metal salamo-like complexes, we have designed and synthesized a new half-salamo-like ligand, HL 1 , and a Cu II complex [Cu 2 (L 2 ) 2 ]. The Cu II complex [Cu 2 (L 2 ) 2 ] was obtained by the reaction of the ligand HL 1 with Cu(OAc) 2 ·H 2 O and contained no acetate ion. This contrasts with the salamo-like complexes previously reported [52,53], in which an acetate ion often accompanied and coordinated with metal ions. The fluorescence property and Hirshfeld surface analysis of the Cu II complex were studied [54]. Experimental Materials and Instrumentation2-Hydroxy-3,5-dichlorobenzaldehyde of 99% purity was obtained from the Alfa Aesar. The other reagents and solvents used in the experiment were purchased from the Tianjin Chemical Reagent Factory at the analytical reagent level and used without further purification [55]. Elemental analyses of metal element (Cu) and non-metallic elements (C, H, and N) were measured by an atomic emission spectrometer (IRIS ER/S·WP-1 ICP) and automatic elemental detection analyzer (GmbH VariuoEL V3.00) from Berlin, Germany, respectively, melting points were measured by the use of a microscopic melting point apparatus made by the Beijing Taike Instrument Limited Company (Beijing, China) and was uncorrected, 1H NMR (nuclear magnetic resonance) spectra were measured by German Bruker AVANCE DRX-400/600 spectroscopy (Bruker AVANCE, Billerica, MA, USA), single crystal X-ray structure data was collected by a CCD surface detecting diffractometer (Bruker, Germany), and Mo-Kα (λ = 0.71073 Å) ray radiation was monochromated with graphite, IR spectra were recorded on a VERTEX 70 spectrophotometer with samples prepared as KBr (500-4000 cm −1 ) from Bruker, Germany, UV-Vis spectra were measured on a UV-3900 spectrophotometer from Hitachi, Tokyo, Japan, fluorescence spectra were recorded ...

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“…Some complexes can be applied to molecular recognitions, catalysts, supramolecular architectures, magnetic materials and fluorescence materials . Two kinds of cavities, N 2 O 2 and O 2 O 2 , are formed in salen‐like or salamo‐like organic ligands, and most transitional and rare earth metal ions can coordinate with the cavity to form mononuclear, multinuclear and heteropolynuclear salen‐like complexes. Compared to salamo‐like ligands, single‐armed salamo‐like ligands can produce more conformational changes and coordination polymers, as well as uncover new features.…”

Section: Introductionmentioning

confidence: 99%

Single‐armed salamo‐like dioxime and its multinuclear Cu (II), Zn (II) and Cd (II) complexes: Syntheses, structural characterizations, Hirshfeld analyses and fluorescence properties

Zhang

Pan

et al. 2019

Applied Organom Chemis

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with a single-armed salamo-like dioxime ligand H 3 L have been synthesized, and characterized by FT-IR, UV-vis, Xray crystallography and Hirshfeld surfaces analyses. The ligand H 3 L has a linear structure and C-H···π interactions between the two molecules. The complex 1 is a dinuclear Cu (II) complex, Cu1 and Cu2 are all five-coordinate possessing distorted square pyramidal geometries. The complex 2 also forms a dinuclear Zn (II) structure, and Zn1 and Zn2 are all five-coordinate bearing distorted trigonal bipyramidal geometries. The complex 3 is a symmetrical tetranuclear Cd (II) complex, and Cd1 is a hexa-coordinate having octahedral configuration and Cd2 is hepta-coordinate with a pentagonal bipyramidal geometry, and it has π···π interactions inside the molecule. In addition, fluorescence properties of the ligand and its complexes 1-3 have also been discussed.

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Unusual constructions of two Salamo-based copper(II) complexes

Cited by 53 publications

References 67 publications

A New Half-Salamo-Based Homo-Trinuclear Nickel(II) Complex: Crystal Structure, Hirshfeld Surface Analysis, and Fluorescence Properties

A New Half-Salamo-Based Homo-Trinuclear Nickel(II) Complex: Crystal Structure, Hirshfeld Surface Analysis, and Fluorescence Properties

Unprecedented Dinuclear CuII N,O-Donor Complex: Synthesis, Structural Characterization, Fluorescence Property, and Hirshfeld Analysis

Single‐armed salamo‐like dioxime and its multinuclear Cu (II), Zn (II) and Cd (II) complexes: Syntheses, structural characterizations, Hirshfeld analyses and fluorescence properties

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