Synthesis of silyliminophenolate zirconium compounds and their catalytic activity over lactide/epoxide

Mert, Olcay; Kayan, Asgar

doi:10.1016/j.apcata.2013.06.010

Cited by 21 publications

(18 citation statements)

References 26 publications

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“…The mass measurement showed that they were random copolymers (Table 1). It is also important to compare the activity of these catalysts with imine-based catalysts in copolymerization GPTS/LLA [15]. Especially SnCl 2 was more reactive than imine-based catalysts that were more selective in regio regular polymerization.…”

Section: Resultsmentioning

confidence: 99%

“…We recently reported the synthesis of silyliminophenolate zirconium compounds, and tested them as catalysts for copolymerization of LLA/GPTS [15]. The promising results for the copolymerization led us to investigate these copolymers deeply with different and more accessible catalysts.…”

Section: Introductionmentioning

confidence: 98%

“…GPTS based organic/silica hybrid colloids embedding with CdSe/ZnS core-shell quantum dots (QDs) were also prepared for examination of the thermo-optical properties [8]. GPTS can be polymerized with the opening of the epoxide ring to yield substituted poly(ethylene oxide) chain with appropriate catalysts [9][10][11][12][13][14][15]. The copolymerization of GPTS with LLA monomer may result in acquiring outstanding material with physical, chemical, and biological properties that can be adaptable for many applications.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of l-Lactide/3-Glycidyloxypropyltrimethoxysilane Copolymeric Materials with Various Catalysts

Kayan

Mert

2014

J Inorg Organomet Polym

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Copolymerization reactions of 3-glycidyloxypropyltrimethoxysilane (GPTS) with L-lactide (LLA) at 100°C for different time intervals are performed by various catalysts such as zirconium perfluoroheptanoate, and commercially available Tin(II) chloride (SnCl 2 ) and sodium trimethylsilanolate (NaOSiMe 3 ). Homo-and copolymers are characterized by FTIR, 1 H-and 13 C-NMR spectroscopies, electrospray ionization mass spectroscopy, thermal gravimetric analysis, differential scanning calorimetry and gel permeation chromatography. All selected catalysts are effective in ROP of monomers. Especially, SnCl 2 is more reactive catalyst in the copolymerization of LLA/GPTS. The structure of final product is found as random copolymers.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Preparation of l-Lactide/3-Glycidyloxypropyltrimethoxysilane Copolymeric Materials with Various Catalysts

Kayan

Mert

2014

J Inorg Organomet Polym

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“…The development of ''single-site'' catalysts has been a key goal for understanding the ROP mechanism and producing polymers with controllable molecular weights and polydispersities [26,27]. Single-site metal alkoxides compounds including different ancillary ligands have been synthesized and used as effective initiators for e-CL polymerizations with good catalytic activities in a controlled manner [28,29].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of substituted salicylate zirconium compounds and their catalytic activity over ε-caprolactone

Mert

Kayan

2014

J Incl Phenom Macrocycl Chem

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In this study, zirconium salicylate compounds (1-6) were prepared by reaction of zirconium(IV) propoxide with 5-chlorosalicylic acid, 4-hydroxysalicylic acid, and 5-nitrosalicylic acid in 1-propanol, respectively. All these compounds (1-6) were characterized by 1 H, 13 C NMR, FTIR, mass spectroscopy, elemental, and thermogravimetric analyses. These compounds were tested as catalysts in polymerization of e-caprolactone and were effective. Polycaprolactone was characterized by 1 H, 13 C NMR, and gel permeation chromatography. The number of salicylate ligands (bonded to zirconium atom) effects and substituents (on salicylate ligands) effects on the polymerization reactions were investigated first time by this study.

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“…However, as can be seen in Figure 6, the GPC chromatogram of the PO polymer prepared at 75 °C with Ti-TAMP showed bimodal molecular weight distribution. The first peak in Figure 6 has weight average molecular weight Transition metal compounds carry out ROP of ε-CL and PO via a coordination-insertion mechanism [26][27][28][29][30][31][32][33]. For example, the polymerization mechanism of ε-CL can be shown in …”

Section: Reactions Of M(or)m (M-ormentioning

confidence: 99%

Preparation and characterization of TAMP/TIMP-Ti and Zr compounds and their catalytic activity over propylene oxide and Ɛ-caprolactone

Kayan¹

2016

J. Turk. Chem. Soc., Sect. A: Chem.

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Titanium and zirconium 2-((p-tolylamino/p-tolylimino)methyl)phenolate (TAMP and TIMP) were prepared by reaction of Tiand Zr-alcoholates with 2-((ptolylamino)methyl)phenol (TAMPH) and 2-((p-tolylimino)methyl)phenol (TIMPH) in ethyl alcohol. To characterize these compounds, 1 H, 13C NMR, FTIR, mass spectroscopies, and elemental analysis were used. The TAMP and TIMP metal compounds can be formulated as (TAMP)3M2(OR)O2 and (TIMP)4M2O2, respectively. The catalytic activity of these compounds was checked in polymerization reactions with propylene oxide (PO) and ε-caprolactone (ε-CL) and Ti-TAMP was effective. Poly-propylene oxide (PPO) and poly-caprolactone (PCL) were identified by 1 H, 13C NMR and gel permeation chromatography (GPC).Keywords: Metal alkoxide, catalyst, Schiff base, ε-caprolactone, polymer.

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Synthesis of silyliminophenolate zirconium compounds and their catalytic activity over lactide/epoxide

Cited by 21 publications

References 26 publications

Preparation of l-Lactide/3-Glycidyloxypropyltrimethoxysilane Copolymeric Materials with Various Catalysts

Preparation of l-Lactide/3-Glycidyloxypropyltrimethoxysilane Copolymeric Materials with Various Catalysts

Synthesis and characterization of substituted salicylate zirconium compounds and their catalytic activity over ε-caprolactone

Preparation and characterization of TAMP/TIMP-Ti and Zr compounds and their catalytic activity over propylene oxide and Ɛ-caprolactone

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