Dalton communications. Synthesis and crystal structure of a disilver(I) complex of a tetraimine Schiff-base macrocycle having N-isopropylidene-bearing pendant arms

Adams, Harry; Bailey, Neil A.; Fenton, David E.; Fukuhara, C.; Hellier, Paul C.; Hempstead, Paul D.

doi:10.1039/dt9920000729

Cited by 14 publications

(4 citation statements)

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“…6−19 Functional modifications on coordinated ligands are used in various inorganic syntheses. 20−24 Such reactions are extended to prepare coordination polymers 25 poly-nuclear complexes, 26−28 rotaxanes, and catenanes. 29−31 Hydrolytic transformations of functional groups are in use to prepare coordination polymers, 32 to modify metallo–organic frameworks 33 and dendrimers.…”

Section: Introductionmentioning

confidence: 99%

“…Self-assemblies of metal complexes are prospective candidates for optical devices. − The photoluminescence of small inorganic complexes is an emerging topic of research in the detection of pollutant and hazardous materials. − Functional modifications on coordinated ligands are used in various inorganic syntheses. − Such reactions are extended to prepare coordination polymers poly-nuclear complexes, − rotaxanes, and catenanes. − Hydrolytic transformations of functional groups are in use to prepare coordination polymers, to modify metallo–organic frameworks and dendrimers. , The transformations of functional groups of framework structures, polymers, and nano-dimensional materials are of general interest to chemical sciences. − The functional groups of fluorescent compounds influence detection ability of certain analytes . Some functional groups of metallo–organic frameworks are responsible for sensing volatile organic compounds.…”

Section: Introductionmentioning

confidence: 99%

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Copper(II), Zinc(II), and Cadmium(II) Formylbenzoate Complexes: Reactivity and Emission Properties

2019

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Synthesis, characterization, reactivity, and sensing properties of 4-formylbenzoate complexes of copper(II), zinc(II), and cadmium(II) possessing the 1,10-phenanthroline ancillary ligand are studied. The crystal structures of the (1,10-phenanthroline)bis(4-formylbenzoate)(aqua)copper(II) and (1,10-phenanthroline)bis(4-formylbenzo-ate)zinc(II) and a novel molecular complex comprising an assembly of mononuclear and dinuclear species of (1,10-phenanthroline)bis(4-formylbenzoate)cadmium(II) are reported. These zinc and cadmium complexes are fluorescent; they show differentiable sensitivity to detect three positional isomers of nitroaniline. The mechanism of sensing of nitroanilines by 1,10-phenanthroline and the complexes are studied by fluorescence titrations, photoluminescence decay, and dynamic light scattering. A plausible mechanism showing that 1,10-phenanthroline ligand-based emission quenched by electron transfer from the excited state of 1,10-phenanthroline to nitroaniline is supported by density functional theory calculations. In an anticipation to generate a fluorescent d10-copper(I) formylbenzoate complex by a mild reducing agent such as hydroxylamine hydrochloride for similar sensing of nitroaromatics as that of the d10-zinc and cadmium 4-formylbenzoate complexes, reactivity of d9-copper(II) with hydroxylamine hydrochloride in the presence of 4-formylbenzoic acid and 1,10-phenanthroline is studied. It did not provide the expected copper(I) complex but resulted in stoichiometry-dependent reactions of 4-formylbenzoic acid with hydroxylamine hydrochloride in the presence of copper(II) acetate and 1,10-phenanthroline. Depending on the stoichiometry of reactants, an inclusion complex of bis(1,10-phenanthroline)(chloro)copper(II) chloride with in situ-formed 4-((hydroxyimino)methyl)benzoic acid or copper(II) 4-(hydroxycarbamoyl)benzoate complex was formed. The self-assembly of the inclusion complex has the bis(1,10-phenanthroline)(chloro)copper(II) cation encapsulated in hydrogen-bonded chloride-hydrate assembly with 4-((hydroxyimino)methyl)benzoic acid.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Copper(II), Zinc(II), and Cadmium(II) Formylbenzoate Complexes: Reactivity and Emission Properties

2019

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“…Mono-or homodi-nuclear metal-containing molecular clefts can be synthesized from the cyclocondensation of functionalised triamines with 2,6-diacetylpyridine, pyridine-2,6dicarbaldehyde, thiophene-2,5-dicarbaldehyde and furan-2,5dicarbaldehyde in the presence of appropriate metal templates such as barium and silver(). [1][2][3][4][5][6][7][8][9][10][11][12][13] The clefts are derived from bibracchial tetraimine Schiff base macrocycles such as L 1 and L 2 and have been used, via transmetallation reactions, to complex copper() and manganese(). The incorporation of a range of functionalised triamines has provided the conformational flexibility to vary the homodinuclear intermetallic separation from ca.…”

Section: Introductionmentioning

confidence: 99%

Dinuclear silver(I) complexes of bibracchial tetraimine Schiff base macrocycles derived from pyrrole-2,5-dicarbaldehyde

Adams¹,

Elsegood²,

Fenton³

et al. 1999

J. Chem. Soc., Dalton Trans.

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“…Nfunctionalization of these macrocycles may enhance their metal-ion selectivity and the stability of metal complexes depending on coordination properties of the pendant arms 20 . Pendant-armed macrocycles and their metal complexes have attracted much interest in the past years [25][26][27][28][29][30] . Synthesis and characterization of Yb-Na dinuclear complex which represents the first example of macrocyclic compartmental complex containing a lanthanide and alkali metal ions with similar pendant arm have been reported by Casellato et al 31 .…”

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confidence: 99%

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2016

IJPSR

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1 for Ce; n = 2 for La, Sm, Gd and Y; n = 3 for Pr, Nd, Eu, and Tb) have been prepared by the condensation of Schiff-bases with the precursor compounds namely, 2,6-diformyl-4-methylphenol, 1,5-diamino-3-azamethypentane and 4,5-dimethyl-1,2-phenylenediamine. All the mononuclear complexes have been prepared in situ by the step-wise condensation from the precursor compounds. The phenolate oxygen atom of the nucleating ligand behaves as a bridging group between the metal. The complexes have been characterized by elemental analysis, IR, UV-Visible, ESI mass spectra and magnetic studies. The yield of these complexes increases from lighter lanthanides to heavier lanthanides. The fluorescence studies were carried out for europium and terbium complexes. The results of elemental analysis of the complexes are in good agreement with the theoretical values. The complexes are soluble in methanol, chloroform, DMF, DMSO, and CH 3 CN. Conductivity studies reveal that all the complexes are 1:1 electrolytes.

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Dalton communications. Synthesis and crystal structure of a disilver(I) complex of a tetraimine Schiff-base macrocycle having N-isopropylidene-bearing pendant arms

Abstract: A disilver(1) complex of a tetraimine Schiff-base macrocycle with stabilised N-isopropylidene-bearing pendant arms has been synthesised and its crystal structure shows that the molecule does not possess the cleft-like appearance previously noted for related disilver(1) complexes.

Cited by 14 publications

References 1 publication

Copper(II), Zinc(II), and Cadmium(II) Formylbenzoate Complexes: Reactivity and Emission Properties

Copper(II), Zinc(II), and Cadmium(II) Formylbenzoate Complexes: Reactivity and Emission Properties

Dinuclear silver(I) complexes of bibracchial tetraimine Schiff base macrocycles derived from pyrrole-2,5-dicarbaldehyde

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