844644-77-5

Upstream product

• 5627-11-2 1,2-bis(aminooxy)ethane 
• 148-53-8 3-methoxy-2-hydroxybenzaldehyde 

Downstream Products

• 1632121-80-2 6-methoxy-6′-ethoxy-2,2′-[ethylenedioxybis(nitrilomethylidyne)]diphenol 
• 844644-78-6 C₁₈H₁₈N₂O₇ 
• 1290040-25-3 C₅₈H₆₀N₁₀O₂₂ 
• 1290040-24-2 C₄₈H₅₀N₈O₁₈ 

Relevant academic research and scientific papers

A new asymmetric salamo-based chemical sensor for dual channel detection of Cu2+ and B4O72?

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.

Synthesis and structural characterization of copper(II) complex with asymmetrical salen-type bisoxime ligand

A new mononuclear Cu(II) complex, [CuL], has been synthesized by the reaction of copper(II) acetate tetrahydrate with H2L (H2L = 4-bromo-6'-methoxy-2,2'-[ethylenediyldioxybis(nitrilomethylidyne)]diphenol). X-Ray crystallographic analysis reveals that the complex crystallizes in the monoclinic system, space group P2(1) and the unit cell contains two crystallographically independent but chemically identical molecules which interlink each other into a 1D infinite chain through four strong intermolecular O12-H12C...O4, O12-H12D...O5, O11-H11C...O9 and O11-H11D...O10 hydrogen bonds.

Syntheses, structures, Hirshfeld surface analyses and magnetic properties of a series of homopolynuclear half-salamo-based complexes

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.

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

Three multinuclear Cu (II), Zn (II) and Cd (II) complexes, [Cu2(L)(μ-OAc)]·CHCl2 (1), [Zn2(L)(μ-OAc)(H2O)]·3CHCl3 (2) and [{Cd2(L)(OAc)(CH3CH2OH)}2]·2CHsub

Synthesis, structure, Hirshfeld analysis and fluorescence properties of a new asymmetric salamo-based ligand and its Cu(II) complex involving oxime oxygen coordination

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.

An asymmetric salen-type bisoxime ligand and its supramolecular copper(II) complex: Synthesis, crystal structure and spectral properties

A supramolecular Cu(II) complex [CuL(H2O)] with an asymmetric salen-type bisoxime ligand (H2L = 4-nitro-6'-methoxy-2,2'- [ethylenediyldioxybis(nitrilomethylidyne)]diphenol) has been synthesized and characterized by elemental analysis, IR and UV/Vis spectroscopy, TG-DTA analysis, and molar conductance measurements. The crystal structure of the Cu(II) complex has been determined by single-crystal X-ray diffraction. The Cu(II) atom is penta-coodinated by N2O2 donor atoms from the asymmetic salen-type bisoxime L2- unit and one oxygen atom from the coordinated water molecule, resulting in an almost regular square-pyramidal geometry. With the help of intermolecular O-H· · · O, C-H···O hydrogen bonding and π ··· π stacking interactions, a self-assembled 3D supramolecular structure is formed.

Tri- and hexanuclear heterometallic Ni(II)-M(II) (M = Ca, Sr and Ba) bis(salamo)-type complexes: Synthesis, structure and fluorescence properties

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.

Four homo- and hetero-bismetallic 3d/3d-2s complexes constructed from a naphthalenediol-based acyclic bis(salamo)-type tetraoxime ligand

The homo/heterotrinuclear metal(II) complexes [Zn3(L)(OAc)2(CH3OH)2]·3CHCl3 (1), [Zn2(L)Ca(OAc)2]·CHCl3 (2), [Zn2(L)Sr(OAc)2] (3) and [Zn2Ba(L)(OAc)2(CH3OH)]·CH3OH·CHCl3 (4), with a novel acyclic bis(salamo)-type tetraoxime ligand H4L, were synthesized and characterized by elemental analyses, IR, UV–vis and fluorescence spectra. UV–vis titrations clearly show that complexation of H4L with Zn(II) ions affords a stoichiometric ratio of 3:1 (M:L) in a cooperative fashion. Complexes 2, 3 and 4 can acquire by the substitution reactions of complex 1 with 1 equivalent of M(OAc)2 (M2+?=?Ca2+, Sr2+ or Ba2+). The crystal structures of complexes 1–4 have been determined by single-crystal X-ray diffraction. The coordinating ability of the [Zn3(L)]2+ units may be utilized as a cation recognition phenomenon.

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

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.

Study on synthesis and crystal structure of an unexpected dialkoxo-bridged dinuclear Cu(II) complex

An unprecedented dinuclear copper(II) complex, [Cu2(L 2)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 NO bonds in the ligand H2L1, giving a novel dialkoxo-bridged dinuclear copper(II) complex possessing a CuOCuO four-membered ring core instead of the usually desired Salen-type bisoxime Cu-N2O2 mononuclear complex. Copyright Taylor & Francis Group, LLC.