Schiff Base Polymers Obtained by Oxidative Polycondensation and Their Co(II), Mn(II) and Ru(III) Complexes: Synthesis, Characterization and Catalytic Activity in Epoxidation of Styrene

Demetgül, Cahıt; Delikanlı, Anıl; Sarıbıyık, Oğuz Yunus; Karakaplan, Mürüvvet; Serın, Selahattın

doi:10.1163/156855511x606164

Cited by 29 publications

(9 citation statements)

References 27 publications

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“…61−63 Especially, Mn(III) complexes with Schiff bases show high activity in the presence of tBuOOH. 64,65 The rhodium mixed ligand complexes also act as homogeneous catalysts in the oxidation of styrene. 67,68 The major product of this reaction was benzaldehyde with minor amounts of the epoxide, phenyl methyl ketone, 68 and tert-butyl alcohol, 67 when tBuOOH was used as the oxygen source.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Norbornene Oxidation by Chiral Complexes Encapsulated in NaY Zeolite

et al. 2014

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The preparation of chiral metal complexes in NaY zeolite is reported. The guests, chiral metal complexes, were entrapped in the supercages of NaY zeolite (host) by a two-step process in the liquid phase: (i) inclusion of the selected transition metal (rhodium(III) and manganese(II)) by ion-exchange in the porous structure and (ii) introduction of the chiral ligand, an d-erythrose amino derivative, namely (2R,4S,5R)-4-[(N-methylamino)methyl]-2-phenyl-1,3-dioxan-5-ol, followed by assembly of the complex inside the void space of the zeolite. Structural (FTIR and XRD), surface studies (SEM) and chemical analyses were used to characterize the new host–guest catalysts and the results indicated that chiral metal complexes were successfully encapsulated in supercages of the NaY zeolite. Catalytic studies were performed in liquid phase for norbornene oxidation using tert-butyl hydroperoxide as the oxygen source. The catalytic results were compared with styrene and cyclohexanol oxidation as model reactions. The prepared chiral catalysts exhibited catalytic activity for all oxidation reactions. The stability of the catalysts before and after reaction was confirmed by cyclic voltammetry and FTIR studies.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Norbornene Oxidation by Chiral Complexes Encapsulated in NaY Zeolite

et al. 2014

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“…From the thermal degradation values, the synthesized polyphenols are relatively good thermally stable than the previously presented polyphenols derivatives. [34] 3.5.1. Limiting oxygen index Flame retardancy of the polymers is evaluated by van Krevelen's method using char residue data from TGA study.…”

Section: Thermal Propertiesmentioning

confidence: 99%

Synthesis, characterization, optical and electrical properties of thermally stable polyazomethines derived from 4,4′-oxydianiline

Dineshkumar

Muthusamy

Chitra

et al. 2015

Journal of Adhesion Science and Technology

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Three soluble, thermally stable azomethine polymers were synthesized by the oxidative polycondensation of azomethine bisphenols using NaOCl as an oxidant in aqueous alkaline medium. The azomethine bisphenol monomers, 4,4′-oxybis[N-(2-hydroxy-3-methoxybenzilidine)aniline], 4,4′-oxybis[N-(2-hydroxy-5-bromobenzilidine) aniline] and 4,4′-oxybis[N-(2-hydroxynaphthalidine) aniline] were synthesized by the condensation of 4,4′-oxydianiline with three aromatic aldehydes. The structures of the monomers and polymers were confirmed by Fourier Transform infrared spectroscopy, UV-visible, 1 H-NMR and 13 C-NMR spectroscopic techniques. Morphology of the synthesized polymers was characterized using scanning electron microscope. The thermal stability of the polymers is evidenced by high carbines residue obtained in TGA. Fluorescence spectra showed that the emission maxima centred in the region 420-460 nm for all the compounds with large stokes shift values (Δλ ST ). Electrical conductivity of iodine-doped polymers was measured by four-point probe technique. The synthesized polymers have shown good electrical conductivity on iodine doping, and it increases with the increase in iodine vapour contact time. The self-extinguishing property of the synthesized polymers was studied by the calculation of the limiting oxygen index values with van Krevelen's equation.

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“…Transition metal complexes of polyazomethine polymers, prepared by the reaction of metal salts and polymers containing electron donor groups like –CH=N–, are showed high catalytic activities in various chemical reactions such as oxidation [ 8 ], epoxidation of olefins [ 9,10 ] and esterification reactions. However, heterogeneous catalysts indicate higher catalytic activity [ 11,12 ] and enantioselectivity [ 13 ] in comparison to homogeneous catalysts [ 14 ]. N-butyl acetate is an important compound in the chemical industry (Scheme 1 ).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of imine bond containing insoluble polymeric ligand and its transition metal complexes, structural characterization and catalytic activity on esterification reaction

Gönül

Karaca

et al. 2017

Designed Monomers and Polymers

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In this study, synthesis of insoluble polymeric ligand (L) and its transition metal complexes [Cu(L)Cl2]·2H2O (1), [Co(L)Cl2(H2O)2] (2) and [Ni(L)Cl2(H2O)2] (3), having the azomethine groups, were synthesized by the condensation reactions of the diamines and dialdehydes. The structural properties were characterized by the analytical and spectroscopic methods using by elemental analysis, Fourier Transform Infrared, Thermo Gravimetric Analysis, Powder X-ray Diffraction, magnetic susceptibility and Inductively Coupled Plasma. The solubilities of the synthesized polymeric materials were also investigated and found as insoluble some organic and inorganic solvents. Additionally, their catalytic performance was carried out for the esterification reaction of acetic acid and butyl acetate. The highest conversion rate is 75.75% by using catalyst 1. The esterification of butanol gave butyl acetate with 100% selectivity.

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Schiff Base Polymers Obtained by Oxidative Polycondensation and Their Co(II), Mn(II) and Ru(III) Complexes: Synthesis, Characterization and Catalytic Activity in Epoxidation of Styrene

Cited by 29 publications

References 27 publications

Norbornene Oxidation by Chiral Complexes Encapsulated in NaY Zeolite

Norbornene Oxidation by Chiral Complexes Encapsulated in NaY Zeolite

Synthesis, characterization, optical and electrical properties of thermally stable polyazomethines derived from 4,4′-oxydianiline

Synthesis of imine bond containing insoluble polymeric ligand and its transition metal complexes, structural characterization and catalytic activity on esterification reaction

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