Synthesis and Fluorescence Properties of Asymmetrical Salamo-Type Tetranuclear Zinc(II) Complex

Peng, Yun-Dong; Li, Xiaoyan; Kang, Quan‐Peng; An, Gao-Xian; Zhang, Yang; Dong, Wen‐Kui

doi:10.3390/cryst8020107

Cited by 40 publications

(11 citation statements)

References 61 publications

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“…The four donor atoms (N1, N2, O1, and O4) formed a base plane, and the dihedral angle of the N1-Cu1-O1 and O4-Cu1-N2 planes was at 2.09(3)°. The axial position was occupied by the oxime oxygen atom (O6); thus, the Cu1 ion possessed a slightly twisted square pyramidal geometry with the τ value τ = 0.004 (τ < 0.5) [15,61]. The distance of Cu1-O6 (2.508 (2)) was considerably longer than the Cu-O and Cu-N bonds (Cu1-O1, 1.914(2); Cu1-O4, 1.921(2); Cu1-N1, 2.014(3) and Cu1-N2, 1.964 (3) The Cu II complex crystallized in the triclinic system, space group P-1, which clearly indicated that the structure of the resulting complex was an unexpected dinuclear Cu II complex of salamo-like ligand H 2 L 2 , not an expected Cu II complex of half-salamo-like ligand HL 1 .…”

Section: Crystal Structure Descriptionmentioning

confidence: 99%

“…The four donor atoms (N1, N2, O1, and O4) formed a base plane, and the dihedral angle of the N1-Cu1-O1 and O4-Cu1-N2 planes was at 2.09(3) • . The axial position was occupied by the oxime oxygen atom (O6); thus, the Cu1 ion possessed a slightly twisted square pyramidal geometry with the τ value τ = 0.004 (τ < 0.5) [15,61].…”

Section: Crystal Structure Descriptionmentioning

confidence: 99%

“…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]. The salamo-like ligands and their metal complexes have special properties and potential applications.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Crystal Structure Descriptionmentioning

confidence: 99%

Section: Crystal Structure Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…In the crystal structure of complex 3, there are a pair of intramolecular hydrogen bonds C19a-H19Ba···O4 (a = 1 − x, 1 − y, 1 − z) to stabilize the whole architecture ( Figure 11, Table 3). Meanwhile, the complex 3 interlinks into one 1D infinite chain along the b axis by a weak intermolecular C11c-H11c···O3 (c = 1 − x, 2 − y, 1 − z) hydrogen bond interaction [90][91][92][93] (Figure 12). In the crystal structure of complex 3, there are a pair of intramolecular hydrogen bonds C19a-H19Ba···O4 (a = 1 − x, 1 − y, 1 − z) to stabilize the whole architecture ( Figure 11, Table 3).…”

Section: Crystal Structure Of Mn III Complexes 1 2 Andmentioning

confidence: 99%

Three Polyhydroxyl-Bridged Defective Dicubane Tetranuclear MnIII Complexes: Synthesis, Crystal Structures, and Spectroscopic Properties

et al. 2018

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Three polyhydroxyl-bridged tetranuclear Mn III complexes [Mn 4 (L 1a ) 2 (µ 3 -OMe) 2 (µ 2 -OMe) 2 (MeOH) 2 ] (1), [Mn 4 (L 2a ) 2 (µ 3 -OMe) 2 (µ 2 -OMe) 2 (H 2 O) 2 ] (2), and [Mn 4 (L 3a ) 2 (µ 3 -OMe) 2 (µ 2 -OMe) 2 (H 2 O) 2 ] (3) derived from Mn n+ -promoted reactivity of Schiff base ligands (HL 1 = 1-(4-{[(E)-3,5-dichlorine-2-hydroxybenzylidene]amino}phenyl)ethanone O-benzyloxime,have been synthesized and characterized. In the Mn III complexes 1, 2, and 3, the newly formed ligands (L 1a ) 4− , (L 2a ) 4− , and (L 3a ) 4− are derived from the chemoselective cleavage of the C=N bond in the original Schiff base ligands HL 1 , HL 2 , and HL 3 to form corresponding halogenated salicylaldehyde, 3,5-dichlorosalicylaldehyde, 3-bromine-5-chlorosalicylaldehyde, and 3,5-dibrominesalicylaldehyde, respectively. Then, the further addition of acetone to two halogenated salicylaldehyde molecules in situ α,α double aldol reaction promoted by Mn n+ ions in the presence of base to give the new ligands ((L na ) 4− . X-ray crystallographic analyses of the Mn III complexes 1, 2, and 3 show that the three complexes are all tetranuclear structure and crystallizes in the triclinic system, space group P-1. The four Mn III ions and bridging alkoxido groups are arranged in a face-shared dicubane-like core with two missing vertices. In the three Mn III complexes, the asymmetric unit contains two kinds of different Mn III ions (Mn1 and Mn2), where the Mn III ions are all hexacoordinated with slightly distorted octahedral geometries. Simultaneously in the synthesis of multinuclear Mn n+ complexes above, we explored the crystal structure, spatial configuration, and spectroscopic properties of the multinuclear Mn III complexes with different halogen substituents. favorable reaction will allow to obtaining ligands that are extremely difficult to separate by classical anionic organic chemistry under conventional conditions. This, in turn, will allow the synthesis of novel-innovative metal complexes that are pre-restricted by ligand design [8][9][10][11][12][13][14][15][16][17]. Based on this, the transition metal Mn ion has become our target of choice due to its various oxidation states and Lewis acidity [18], which acts as a potential promoter to study the extent of the in situ aldol reaction of acetone and salicylaldehyde derivatives. Up to now, the use of Mn ions for the synthesis of aldol products has been relatively little explored, as reported, a unique one-pot α,α-double aldol addition of acetone to two o-vanillin molecules promoted by Mn n+ ions in situ, leading to a novel multidentate ligand, further obtained a rare defect-dicubane {Mn 4 } complex [19]. Therefore, we hope that we can synthesize a variety of multinuclear Mn complexes, explore the spatial structure and crystal parameters, and perhaps determine the laws.Moreover Schiff base ligands and their complexes have been application in many fields [20][21][22][23], such as biological activity reagents [24][25][26][27][28][29][30][31][32][33][34], magnetic materials [35][36][37]...

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“…The structural motifs of these coordination compound molecules may be affected by several factors, such as the performance of the ligands, the property of the central atoms, anion effects, solvent effects, and so on [50][51][52][53][54][55][56][57][58][59]. Transition metal Salamo-type coordination compounds have aroused widespread concerns for their photophysical properties [60][61][62][63][64][65][66]. Previous studies have been carried out on the mononuclear coordination compounds [67,68].…”

Section: Introductionmentioning

confidence: 99%

Unprecedented Hexanuclear Cobalt(II) Nonsymmetrical Salamo-Based Coordination Compound: Synthesis, Crystal Structure, and Photophysical Properties

et al. 2018

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Abstract:A novel hexanuclear Co(II) coordination compound with a nonsymmetrical Salamo-type bisoxime ligandH 4 L, namely [{Co 3 (HL)(MeO)(MeOH) 2 (OAc) 2 } 2 ]·2MeOH, was prepared and characterized by elemental analyses, UV-vis, IR and fluorescence spectra, and X-ray single-crystal diffraction analysis. Each Co(II) is hexacoordinated, and possesses a distorted CoO 6 or CoO 4 N 2 octahedrons. The Co(II) coordination compound possesses a self-assembled infinite 2D supramolecular structure with the help of the intermolecular C-H···O interactions. Meanwhile, the photophysical properties of the Co(II) coordination compound were studied.

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Synthesis and Fluorescence Properties of Asymmetrical Salamo-Type Tetranuclear Zinc(II) Complex

Cited by 40 publications

References 61 publications

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

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

Three Polyhydroxyl-Bridged Defective Dicubane Tetranuclear MnIII Complexes: Synthesis, Crystal Structures, and Spectroscopic Properties

Unprecedented Hexanuclear Cobalt(II) Nonsymmetrical Salamo-Based Coordination Compound: Synthesis, Crystal Structure, and Photophysical Properties

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