Metal complexes of alkyl-aryl dithiocarbamates: Structural studies, anticancer potentials and applications as precursors for semiconductor nanocrystals

Andrew, Fartisincha P.; Ajibade, Peter A.

doi:10.1016/j.molstruc.2017.10.106

Cited by 51 publications

(26 citation statements)

References 106 publications

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“…Dithiocarbamates themselves have proved to be useful ligands in the field of coordination chemistry . Their synthesis is simple and inexpensive and generally involves the reaction of either secondary or primary amines with carbon disulfides in the presence of a base such as sodium hydroxide . They boast the ability to stabilize transition metals in various oxidation states and, in the process, to form complexes with transition and main group metals .…”

Section: Introductionmentioning

confidence: 99%

Co(III) N,N′‐diarylformamidine dithiocarbamate complexes: Synthesis, characterization, crystal structures and biological studies

Oladipo

Omondi

Mocktar

2020

Applied Organom Chemis

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Three symmetric N,N‐diarylformamidine dithiocarbamates, N,N′‐bis(2,6‐dimethylphenyl)formamidine dithiocarbamate (DTL1), N,N′‐bis(2,6‐disopropylphenyl)formamidine dithiocarbamate (DTL2) and N,N′‐dimesitylformamidine dithiocarbamate (DTL3), and three unsymmetric ones, N′‐(2,6‐dichlorophenyl‐N‐(2,6‐dimethylphenyl)formamidine dithiocarbamate (DTL4), N′‐(2,6‐dichlorophenyl)‐N‐(2,6‐diisopropylphenyl)formamidine dithiocarbamate (DTL5) and N′‐(2,6‐dichlorophenyl)‐N‐mesitylformamidine dithiocarbamate (DLT6), were reacted with chloridocobalt(III) in water to give Co‐(DTL1)3 (1), Co‐(DTL2)3 (2), Co‐(DTL3)3 (3), Co‐(DTL4)3 (4), Co‐(DTL5)3 (5) and Co‐(DTL6)3 (6). All the dithiocarbamates and complexes were characterized using 1H NMR, 13C NMR, Fourier transform infrared, UV–visible and mass spectra and the purity confirmed by elemental analysis. In addition, crystal structures of complexes 1, 2, 4 and 5 were determined, confirming the formation of mononuclear species in which the Co(III) centers coordinated to six sulfur atoms from three dithiocarbamate ligands resulting in distorted octahedral geometries. All complexes showed moderate to good antibacterial activities against Gram‐negative bacteria Escherichia coli, Salmonella typhimurium, Klebsiella pneumoniae and Pseudomonas aeruginosa even at low concentrations. None of the six were active against Gram‐positive bacterium methicillin‐resistant Staphylococcus aureus and only active against S. aureus at high concentrations. Complexes 5 and 6 were found to be more active than ciprofloxacin against S. typhimurium, E. coli, P. aeruginosa and K. pneumoniae and complexes with chloro‐substituted ligands generally had enhanced activities. Antioxidant activities of the dithiocarbamate salts and their Co(III) complexes were also investigated using DPPH assay and the complexes were found to be more efficient. Complex 2 with an IC50 value of 2.84 × 10−4 mM displayed the highest activity of all compounds tested, even outdoing ascorbic acid. The radical scavenging ability of the complexes followed the order 2 > 1 > ascorbic acid >3 > 4 > 6 > 5.

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Section: Introductionmentioning

confidence: 99%

Co(III) N,N′‐diarylformamidine dithiocarbamate complexes: Synthesis, characterization, crystal structures and biological studies

Oladipo

Omondi

Mocktar

2020

Applied Organom Chemis

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“…This allowed both materials to demonstrate photocatalytic performance under visible-light irradiation. Photodegradation of methylene blue over newly prepared ZnS NPs was tested under visible light, demonstrating efficiency of 50%-60% after 180 min.Materials 2020, 13, 171 2 of 12 Among the chemical methods for preparation of semiconductor NPs, high-temperature thermolysis of a molecular precursor is a useful approach to achieve monodispersed NPs with well-controlled size [19][20][21][22][23][24]. Atomic rearrangement takes place throughout the NP formation process from a single-source compound, resulting in a uniform distribution of metal ions and retention of the initial stoichiometry in the final product.…”

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confidence: 99%

“…Coordinated organic molecules of the precursor are able to act as in-situ capping agents for created NPs [20]. As an example, Liu et al reported on the use of glutathione as both ligand and sulfur source for luminescent CdS NPs with tunable color [21].Thermal decomposition of coordination compounds with S-containing ligands (such as dithiocarbamate, dithiocarbonate (xanthate), trithiocarbonate, thiosemicarbazone, and thiobiuret), which serve as sulfide sources, has already been applied to produce metal sulfide NPs with good crystallinity, narrow size distribution, and tunable dimensions [22][23][24][25]. For instance, a hot-injection route, which uses thermolysis of metal (Zn, Cd, Hg) complexes in alkylamine at 230-280 • C, was shown to lead to formation of monodispersed metal sulfide NPs wrapped with amines [26][27][28][29][30].…”

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confidence: 99%

Room-Temperature Synthesis of ZnS Nanoparticles Using Zinc Xanthates as Molecular Precursors

et al. 2020

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Molecular precursors are suitable starting compounds for preparation of semiconductor nanoparticles (NPs), which allow for control of atomic ratio, composition, monodispersity, and particle size of nanoscaled metal sulfides/oxides. In the present study, we carried out a one-pot synthesis of ZnS NPs in aqueous triethanolamine medium at room temperature, from molecular precursor zinc xanthate as a source of both Zn2+ and S2− ions. Furthermore, we compared the products obtained from zinc ethylxanthate (Zn(C2H5OCS2)2) and zinc amylxanthate (Zn(C5H11OCS2)2). The as-prepared ZnS NPs were found to crystallize in cubic phase, which usually forms at low temperatures, with the dimension dependent on the xanthate precursor used. The long carbon-chain xanthate Zn(C5H11OCS2)2 gave spherically shaped NPs with an average diameter of 19 nm, while the NPs that originated from zinc ethylxanthate had a mean size of ~26 nm. Both nanomaterials had surface sulfur vacancies that extended their absorption spectra toward the visible region and reduced the band gap. This allowed both materials to demonstrate photocatalytic performance under visible-light irradiation. Photodegradation of methylene blue over newly prepared ZnS NPs was tested under visible light, demonstrating efficiency of 50%–60% after 180 min.

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“…In this work, we report a facile in situ conversion method to obtain hexagonal‐phase Ag 3 SbS 3 QDs by reaction between a metal complex of binary Sb/S organic precursor, antimony tri(isooctyl thioglycollate), and Ag nanocrystals under low temperature. Metal complex precursors working as a metal/sulfide organic precursor have been widely utilized for synthesis of multinary metal chalcogenides . Lu and his co‐workers reported the synthesis of Cu‐In‐S based NCs at relatively low temperature.…”

Section: Figurementioning

confidence: 99%

“…Metal complexp recursorsw orking as am etal/sulfide organic precursor have been widely utilized for synthesis of multinary metal chalcogenides. [19][20][21][22] Lu and his co-workersr eportedt he synthesis of Cu-In-S based NCs at relativelyl ow temperature. It was achieved in non-coordinated solvents (such as toluene) using metal diethyldithiocarbamate complexes.…”

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confidence: 99%

Near‐Infrared Luminescent Ternary Ag₃SbS₃ Quantum Dots by in situ Conversion of Ag Nanocrystals with Sb(C₉H₁₉COOS)₃

Wang

Zhao

et al. 2018

Chemistry A European J

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Differently from the normal three single precursor method to produce colloidal ternary quantum dots (QDs), herein ternary Ag3SbS3 quantum dots (QDs) with efficient near‐infrared (NIR) luminescence have been prepared by a new facile in situ conversion of Ag nanocrystals (NCs) with a binary Sb/S organic precursor Sb(C9H19COOS)3 under low temperature. The unprecedented construction evolution from Ag NCs to Ag3SbS3/Ag hetero‐structure and final monodisperse Ag3SbS3 QDs has been demonstrated. These novel Ag3SbS3 QDs exhibit efficient NIR emission at ≈1263 nm and possess high colloidal stability.

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Metal complexes of alkyl-aryl dithiocarbamates: Structural studies, anticancer potentials and applications as precursors for semiconductor nanocrystals

Cited by 51 publications

References 106 publications

Co(III) N,N′‐diarylformamidine dithiocarbamate complexes: Synthesis, characterization, crystal structures and biological studies

Co(III) N,N′‐diarylformamidine dithiocarbamate complexes: Synthesis, characterization, crystal structures and biological studies

Room-Temperature Synthesis of ZnS Nanoparticles Using Zinc Xanthates as Molecular Precursors

Near‐Infrared Luminescent Ternary Ag₃SbS₃ Quantum Dots by in situ Conversion of Ag Nanocrystals with Sb(C₉H₁₉COOS)₃

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Metal complexes of alkyl-aryl dithiocarbamates: Structural studies, anticancer potentials and applications as precursors for semiconductor nanocrystals

Cited by 51 publications

References 106 publications

Co(III) N,N′‐diarylformamidine dithiocarbamate complexes: Synthesis, characterization, crystal structures and biological studies

Co(III) N,N′‐diarylformamidine dithiocarbamate complexes: Synthesis, characterization, crystal structures and biological studies

Room-Temperature Synthesis of ZnS Nanoparticles Using Zinc Xanthates as Molecular Precursors

Near‐Infrared Luminescent Ternary Ag3SbS3 Quantum Dots by in situ Conversion of Ag Nanocrystals with Sb(C9H19COOS)3

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Product

Resources

About

Near‐Infrared Luminescent Ternary Ag₃SbS₃ Quantum Dots by in situ Conversion of Ag Nanocrystals with Sb(C₉H₁₉COOS)₃