844644-77-5Relevant articles and documents
A new asymmetric salamo-based chemical sensor for dual channel detection of Cu2+ and B4O72?
Bian, Ruo-Nan,Ding, Yu-Jie,Dong, Wen-Kui,Guo, Shuang-Zhu,Xu, Xin
, (2020)
A new type of asymmetric salamo-based colorimetric and fluorescent chemical sensor H2L was synthesized and characterized. The chemical sensor H2L has an efficient dual channel for Cu2+ and B4O72? under the solvent conditions of DMF : H2O = 9 : 1 identify the effect. The oxime nitrogen and phenolic oxygen atoms in the chemical sensor H2L can be used as the binding sites for Cu2+. Further DFT theoretical calculations confirmed that the chemical sensor H2L can combine with Cu2+ to form a 1 : 1 complex, which in turn leads to quenching of fluorescence. Meanwhile, through ESP analysis, the N and O atoms in the chemical sensor H2L have an electron donor capability, due to the introduction of B4O72?, the density of the electron cloud around the N and O atoms was changed, prompting the fluorophore of the chemical sensor H2L to produce stronger fluorescence. The minimum detection limit of chemical sensor H2L for Cu2+ is 1.99 × 10?7 M, and the minimum detection limit for B4O72? is 7.57 × 10?7 M. In addition, the chemical sensor H2L was also used to detect the Cu2+ content in different water samples in life.
Syntheses, structures, Hirshfeld surface analyses and magnetic properties of a series of homopolynuclear half-salamo-based complexes
Li, Xiao-Yan,Liu, Chang,Gao, Lei,Sun, Yin-Xia,Zhang, Yang,Dong, Wen-Kui
, p. 320 - 331 (2018)
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), [Cu2(L)2(μ-OAc)2] (1) and [{Ni3(μ-OAc)2(L)2(OAc)2]·CHCl3 (2), and one tetranuclear Co(II) complex [Co4(L′)4(MeOH)4] (3) based on an unexpected ligand H2L′ 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.
Synthesis, structure, Hirshfeld analysis and fluorescence properties of a new asymmetric salamo-based ligand and its Cu(II) complex involving oxime oxygen coordination
Xu, Xin,Wang, Ji-Fa,Bian, Ruo-Nan,Zhao, Li
, p. 2209 - 2223 (2020)
A new asymmetric salamo-based ligand (H2L) was synthesized and upon reaction with Cu(ClO4)2 an extremely rare dinuclear Cu(II) complex [Cu2(L)2] was formed and characterized by elemental analyses, infrared spectroscopy, UV–vis absorption spectroscopy, X-ray single crystal diffraction and Hirshfeld surface analyses. The Cu(II) complex consists of two Cu(II) ions and two fully deprotonated ligand (L)2– units. The Cu(II) is coordinated with the N2O2 cavity (N1, N2, O1 and O4) of L2– and the oxime oxygen (O3) of another L2– unit to form a uncommon dinuclear structure. The Cu(II) is five-coordinated, τ = 0.02, and has a configuration of slightly twisted tetragonal pyramidal geometry. The comparison between H2L and its Cu(II) complex through Hirshfeld surface analyses shows that the interaction of O-H/H-O is reduced, indicating that deprotonation of phenolic hydroxyl group and the coordination of Cu(II) forms a stable complex. In addition, fluorescence quenching of the Cu(II) complex compared to H2L further confirms the above experimental results.
Tri- and hexanuclear heterometallic Ni(II)-M(II) (M = Ca, Sr and Ba) bis(salamo)-type complexes: Synthesis, structure and fluorescence properties
Dong, Xiu-Yan,Li, Xiao-Yan,Liu, Ling-Zhi,Zhang, Han,Ding, Yu-Jie,Dong, Wen-Kui
, p. 48394 - 48403 (2017)
Three heterometallic Ni(ii)-M(ii) (M = Ca, Sr and Ba) complexes, two discrete heterotrinuclear complexes [Ni2(L)Ca(OAc)2(CH3OH)2]·2C2H5OH·2CHCl3 (1) and [Ni2(L)Sr(OAc)2(CH3OH)2]·2CH3OH·2CH2Cl2 (2) and a discrete heterohexanuclear dimer [Ni2(L)Ba(OAc)2(CH3OH)2(H2O)]2·2CH3OH (3), were synthesized with a naphthalenediol-based acyclic bis(salamo)-type ligand (H4L), and characterized by elemental analyses, IR, UV-vis spectra, fluorescence spectra and X-ray crystallography. The heterometallic complexes were acquired by the reaction of H4L with 2 equiv. of Ni(OAc)2·4H2O and 1 equiv. of M(OAc)2 (M = Ca, Sr and Ba). The crystal structures of complexes 1-3 have been determined by single-crystal X-ray diffractions. Owing to the different nature of the N2O2 and O6 sites of the ligand H4L, the introduction of two different metal(ii) atoms to the site-selective moiety, leads to the two Ni(ii) atoms occupied both the N2O2 sites, an alkaline earth metal atom occupied the O6 site of the ligand (L)4- unit, respectively. Furthermore, the fluorescence properties have been discussed.
Synthesis and fluorescence properties of structurally characterized heterobimetalic Cu(II)–Na(I) Bis(salamo)-Based complex bearing square planar, square pyramid and triangular prism geometries of metal centers
Dong, Xiu-Yan,Zhao, Qing,Wei, Zhi-Li,Mu, Hao-Ran,Zhang, Han,Dong, Wen-Kui
, (2018)
A novel heterotrinuclear complex [Cu2(L)Na(μ-NO3)]·CH3OH·CHCl3 derived from a symmetric bis(salamo)-type tetraoxime H4L having a naphthalenediol unit, was prepared and structurally characterized via means of elemental analyses, UV-Vis, FT-IR, fluorescent spectra and single-crystal X-ray diffraction. The heterobimetallic Cu(II)–Na(I) complex was acquired via the reaction of H4L with 2 equivalents of Cu(NO3)2·2H2O and 1 equivalent of NaOAc. Clearly, the heterotrinuclear Cu(II)–Na(I) complex has a 1:2:1 ligand-to-metal (Cu(II) and Na(I)) ratio. X-ray diffraction results exhibited the different geometric behaviors of the Na(I) and Cu(II) atoms in the heterotrinuclear complex; the both Cu(II) atoms are sited in the N2O2 coordination environments of fully deprotonated (L)4? unit. One Cu(II) atom (Cu1) is five-coordinated and possesses a geometry of slightly distorted square pyramid, while another Cu(II) atom (Cu2) is four-coordination possessing a square planar coordination geometry. Moreover, the Na(I) atom is in the O6 cavity and adopts seven-coordination with a geometry of slightly distorted single triangular prism. In addition, there are abundant supramolecular interactions in the Cu(II)–Na(I) complex. The fluorescence spectra showed the Cu(II)–Na(I) complex possesses a significant fluorescent quenching and exhibited a hypsochromic-shift compared with the ligand H4L.
Highly efficient detection of Cu2+ and B4O72? based on a recyclable asymmetric salamo-based probe in aqueous medium
Xu, Xin,Li, Ya-Juan,Feng, Tao,Dong, Wen-Kui,Ding, Yu-Jie
, p. 169 - 179 (2021)
An asymmetric salamo-based probe molecule (H2L) was synthesized and characterized structurally. When DMF/H2O (9:1) was used as the solvent, it was shown probe H2L has high sensitivity to Cu2+. Using high-resolution mass spectrometry and theoretical calculation, it was found that probe H2L could form a more stable complex (1:1) with Cu2+, the minimum limit of detection (LOD) of H2L for Cu2+ was calculated as 9.95 × 10?8 M. In addition, probe H2L could also be used to identify B4O72? under the same detection conditions and the minimum LOD of H2L for B4O72? was calculated as 4.98 × 10?7 M. At the same time, density functional theory theoretical calculation further proved the flexibility of probe H2L. Through the action of EDTA, probe H2L had a cyclic ability to recognize Cu2+, and showed a better response in the physiological pH range; probe H2L had the characteristics of fast recognition speed and high efficiency. In addition, with probe H2L test paper for Cu2+ and B4O72?, the effect was more obvious. Meanwhile, probe H2L can be used to quantitatively detect Cu2+ in water samples.
Novel multinuclear transition metal(II) complexes based on an asymmetric Salamo-type ligand: Syntheses, structure characterizations and fluorescent properties
Dong, Wen-Kui,Zhang, Jing,Zhang, Yang,Li, Na
, p. 95 - 102 (2016)
Three multinuclear complexes, [{Cu(HL)(OAc)Cu}2]·CH3OH, [Zn(HL)(OAc)Zn(CH3CH2OH)] and [{Cd(HL)(OAc)Cd(CH3CH2OH)}2]·2CHCl3, have been synthesized with an asymmetric Salamo-type ligand H4L, and characterized by FT-IR, UV–vis spectra and X-ray crystallography. The Cu(II) complex contains two crystallographically independent but chemically identical dinuclear complexes (molecules 1 and 2). Meanwhile, self-assembled infinite 1D, 2D and 3D structures are formed by intermolecular hydrogen bonds and C–H?π interactions of neighboring complexes in the solid state. The Zn(II) complex also forms a novel dinuclear structure. And a self-assembled infinite 2D structure is formed by C–H?π interaction of neighboring complexes in the solid state. Otherwise, the Cd(II) complex forms an infinite 1D structure by C–H?π interaction of the neighboring complex molecules. In addition, the photophysical properties of the Cu(II), Zn(II) and Cd(II) complexes have also been discussed.
Tetranuclear cobalt(II) and nickel(II) complexes with an unsymmetrical salamo-like ligand: Structural characterization, Hirshfeld analysis and fluorescent properties
Dong, Wen-Kui,Long, Hai-Tao,Pu, Lu-Mei,Xu, Wei-Bing,Yu, Meng,Zhang, Yu
, (2020)
Two newly designed tetranuclear transition metal(II) complexes, [{Co(L)(μ-OAc)Co(CH3OH)2}2] and [{Ni(L)(DMF)(μ-OAc)Ni}2] derived from an unsymmetrical salamo-like donor-N2O4 ligand (H3L: 6-hydroxy-6′-methoxy-2, 2′-[ethylenediyldioxybis(nitrilomethylidyne)]diphenol) were synthesized and characterized by elemental analysis, FT-IR, UV-vis, fluorescence spectroscopy, X-ray crystallography and Hirshfeld surface analysis. The Co(II) complex includes two fully deprotonated (L)3? moieties, two μ-acetato ligands and four coordinated methanol molecules, bearing a highly symmetrical tetranuclear structure. The terminal Co(II) ions are penta-coordinated and have slightly twisted triangular bipyramidal geometries, and the central Co(II) ions are hexa-coordinated and possess slightly twisted octahedral geometries. The Co(II) complex was self-assembled by adequate intermolecular hydrogen bonding interactions giving rise to an infinite two-dimensional supramolecular structure. The Ni(II) complex adopts a symmetric tetranuclear structure including two fully deprotonated (L)3? units, two coordinated DMF molecules, and two μ-acetato ligands. All the Ni(II) ions are hexa-coordinated and have slightly twisted octahedral geometries. At the same time, the fluorescent properties and Hirshfeld surfaces analyses of the Co(II) and Ni(II) complexes were also investigated in detail.
A novel O-phenanthroline-based bis(half-salamo)-like chemical sensor: For rapid and efficient continuous recognition of Cu2+, HPO42? and H2PO4?
Bian, Ruo-Nan,Xu, Xin,Feng, Tao,Dong, Wen-Kui
, (2020/11/10)
A novel O-phenanthroline-based bis(half-salamo)-like fluorescent chemical sensor LPOV with two N3O coordination sites was synthesized. These N3O coordination sites were used for binding to specific metal ions. The sensor L
AN NOVEL ANTIBACTERIAL ACTIVE [CuII–GdIII] COMPLEX CONSTRUCTED FROM AN ASYMMETRIC SALAMO-BASED LIGAND: SYNTHESIS AND STRUCTURAL CHARACTERIZATION
Li,An,Wang,Wang,Xue
, p. 1993 - 2006 (2020/12/28)
Abstract: In the present study, we describe a reaction of Cu(OAc)2·H2O and Gd(NO3)3·6H2O with equimolar amounts of the asymmetric salamo-type ligand 6-methoxy-6′-ethoxy-2,2′-[ethylenedioxybis(azinomethyl)]diphenol (H2L) generated by Schiff base condensation of 2-[O-(1-ethyloxyamide)]oxime-3-methoxy-phenol with 3-ethoxysalicylaldehyde to obtain a novel 3d–4f hetero-polynuclear complex [{Cu(L)Gd(NO3)3}2] [Cu(L)Gd(NO3)3]2. The complex is fully characterized by X-ray diffraction (XRD), elemental analyses, FTIR and UV-Vis spectra. The phase purity is clearly confirmed by powder XRD. In the [CuII–GdIII] complex, the coordination environments of CuII ions are different, but the apical coordination atoms to the GdIII ions are nearly identical. The antibacterial and fluorescent properties of the H2L ligand and the [CuII–GdIII] complex are also investigated. Supramolecular interactions are studied in detail.
