Organic–inorganic hybrid catalysts containing new Schiff base for environment friendly cyclohexane oxidation

Antony, R.; Manickam, S. Theodore David; Karuppasamy, K.; Kollu, Pratap; Chandrasekar, P. V.; Balakumar, S.

doi:10.1039/c4ra08303b

Cited by 30 publications

(12 citation statements)

References 62 publications

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“…3(a) . The addition of metal nitrate salts to the SBL affects the structural organization of metal complexes and shifts the wavenumber regions toward higher wavenumbers 49 , 50 . For instance, the absorption bands of the metal complexes, SBLPr, SBLEr, and SBLYb, are shifted to higher wavenumbers than those of the SBL (i.e., 1661, 1660, and 1662 cm −1 , respectively) in the spectra.…”

Section: Resultsmentioning

confidence: 99%

In vitro cytotoxicity activity of novel Schiff base ligand–lanthanide complexes

Andiappan

Sanmugam

Easwaramoorthy

et al. 2018

Sci Rep

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130

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A Schiff base ligand (SBL), N2, N3-bis (anthracen-9-ylmethylene) pyridine-2, 3-diamine, was synthesized through the condensation of 2,6-diaminopyridine and anthracene-9-carbaldehyde using a 1:2 ratio. 1H NMR spectra confirmed the observation of non-involvement aromatic carboxylic proton in SBL. A novel series of lanthanide (i.e., praseodymium (Pr), erbium (Er), and ytterbium (Yb))-based SBL metal complexes was successfully synthesized, and their functional groups were elaborately demonstrated using UV–visible, Fourier transform infrared (FT-IR), and fluorescence spectroscopy analyses. FT-IR spectral studies revealed that SBL behaved as a bidentate ligand and it was structured with metal ions by the two azomethine nitrogens. The synthesized SBL-based metal complexes were elaborately performed for cytotoxicity activity versus Vero, human breast cancer (MCF7), and cervical (HeLa) anticancer cell lines.

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Section: Resultsmentioning

confidence: 99%

In vitro cytotoxicity activity of novel Schiff base ligand–lanthanide complexes

Andiappan

Sanmugam

Easwaramoorthy

et al. 2018

Sci Rep

Self Cite

130

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“…In addition, the amine (‐NH 2 ) group of corresponding amino acid coordinates to the metal ion which is confirmed by appearance of peaks in between the range of 3000‐3270 cm ‐1 . It signifies the incorporation of histidine to the synthesized complexes . The formations of M‐N and M‐O bonds are established by the existence of new peaks appeared at around 447‐476 cm ‐1 and 515‐536 cm ‐1 due to the coordination of nitrogen and oxygen atom of the ligand to the metal ion.…”

Section: Resultsmentioning

confidence: 88%

Biological contour, molecular docking and antiproliferative studies of DNA targeted histidine based transition metal(II) complexes: Invention and its depiction

Arunadevi¹,

Raman²

2018

Applied Organom Chemis

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A novel series of histidine derived transition metal complexes were synthesized and characterized by multispectral techniques such as UV-Vis., FT IR, EPR, NMR, ESI-mass analysis and other physico-chemical methods like elemental analysis, molar conductivity, magnetic susceptibility. The synthesized compounds were attempted for their biological prospective. The biological studies involved are DNA interaction (binding and damage), antimicrobial, antioxidant, antiproliferative and molecular docking. DNA interaction studies were carried out with the help of UV-Vis absorption titration, viscosity measurement and cyclic voltammetric techniques which revealed that the synthesized compounds could interact with CT-DNA through intercalative binding mode. A gel electrophoresis assay demonstrated the ability of complexes to cleave the supercoiled pUC18 DNA. The antioxidant property shows that the metal complexes have preferable ability to scavenge hydroxyl radical than the ligand.Moreover, the antimicrobial assay indicates that these complexes are good antimicrobial agents against various pathogens. Furthermore, the in vitro antiproliferative activities of the complexes were examined on HeLa, Hep G2 and NIH 3 T3 cell lines using an MTT assay. The morphological changes were investigated using Hoechst 33258 staining apoptosis assay. In addition, molecular docking studies were executed to considerate the nature of binding of the synthesized complexes with protein and DNA.

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“…Interestingly, a few FSs, known as the famous heterogeneous organocatalysts, do not need the metal active sites to demonstrate the catalytic activity in certain reactions like esterification . Being the organic‐inorganic hybrids, FSs could combine the benefits of homogeneous (accessibility of all the active sites) and heterogeneous catalysis (reusability of the active sites) . Functionalization has been mostly executed on SBA‐15 than the rest of the silicas due to its stability and dual porosity (mesopores and intra‐wall ultra‐super micropores or secondary mesopores) .…”

Section: Introductionmentioning

confidence: 99%

Functionalized Silicas for Metal‐Free and Metal‐Based Catalytic Applications: A Review in Perspective of Green Chemistry

Antony

Marimuthu

Yang

et al. 2019

The Chemical Record

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Heterogeneous catalysis plays a key role in promoting green chemistry through many routes. The functionalizable reactive silanols highlight silica as a beguiling support for the preparation of heterogeneous catalysts. Metal active sites anchored on functionalized silica (FS) usually demonstrate the better dispersion and stability due to their firm chemical interaction with FSs. Having certain functional groups in structure, FSs can act as the useful catalysts for few organic reactions even without the need of metal active sites which are termed as the covetous reusable organocatalysts. Magnetic FSs have laid the platform where the effortless recovery of catalysts is realized just using an external magnet, resulting in the simplified reaction procedure. Using FSs of multiple functional groups, we can envisage the shortened reaction pathway and, reduced chemical uses and chemical wastes. Unstable bio‐molecules like enzymes have been stabilized when they get chemically anchored on FSs. The resultant solid bio‐catalysts exhibited very good reusability in many catalytic reactions. Getting provoked from the green chemistry aspects and benefits of FS‐based catalysts, we confer the recent literature and progress focusing on the significance of FSs in heterogeneous catalysis. This review covers the preparative methods, types and catalytic applications of FSs. A special emphasis is given to the metal‐free FS catalysts, multiple FS‐based catalysts and magnetic FSs. Through this review, we presume that the contribution of FSs to green chemistry can be well understood. The future perspective of FSs and the improvements still required for implementing FS‐based catalysts in practical applications have been narrated at the end of this review.

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Organic–inorganic hybrid catalysts containing new Schiff base for environment friendly cyclohexane oxidation

Abstract: Organic and inorganic entities have been hybridized using 3-aminopropyltriethoxysilane (APTES) linker for the synthesis of three novel organic–inorganic hybrid catalysts [Cu(ii), Co(ii) and Ni(ii)].

Cited by 30 publications

References 62 publications

In vitro cytotoxicity activity of novel Schiff base ligand–lanthanide complexes

In vitro cytotoxicity activity of novel Schiff base ligand–lanthanide complexes

Biological contour, molecular docking and antiproliferative studies of DNA targeted histidine based transition metal(II) complexes: Invention and its depiction

Functionalized Silicas for Metal‐Free and Metal‐Based Catalytic Applications: A Review in Perspective of Green Chemistry

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