Highly controllable poly(N-vinylimidazole)-supported ruthenium catalysts for olefin metathesis reactions in aqueous media

Öztürk, Bengi Özgün; Sarıaslan, Begüm; Bayramgil, Nursel Pekel; Şehitoğlu, Solmaz Karabulut

doi:10.1016/j.apcata.2014.06.024

Cited by 17 publications

(3 citation statements)

References 29 publications

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“…The characteristic peaks of the imidazole ring [Figure (a)] were observed at 1671.8 and 1495.8 cm −1 because of the CC and CN vibrations, respectively; 1284.4 cm −1 for a mixed peak of CN and CN stretching vibrations; and 908.3 cm −1 for the ring stretching vibrations. The peaks of the CH stretching vibrations for imidazole ring and polymer backbone were located at 3103.8 and 2948.9 cm −1 , respectively . Compared with PVI, some new peaks appeared for HCIMPM(5%) [Figure (b)], namely, 1556.5 cm −1 for the stretching vibrations of the benzene skeleton and 828.01 cm −1 for the CH deformation vibrations of the benzene ring.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of a hypercrosslinked, ionic, mesoporous polymer monolith and its application in deep oxidative desulfurization

Jiang

Sun

Chen

et al. 2018

J of Applied Polymer Sci

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In this study, we used a facile and scalable strategy to produce a hypercrosslinked, ionic, mesoporous polymer monolith (HCIMPM). On the basis of structure-directing polymeric crosslinking, the interconnected nanonetwork was formed through the in situ crosslinking of the homopolymer poly(vinyl imidazole) via a quaternization reaction, and its textural properties could be effectively adjusted by the block copolymer poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide)(PEO 20 PPO 70 PEO 20 ). The maximum specific surface area and pore volume were 212 m 2 /g and 1.08 cm 3 /g, respectively. Furthermore, the synthetic framework could be functionalized via the loading of PW 12 O 32 40 through ion exchange. The obtained HCIMPM with PW 12 O 40 32 (PW-HCIMPM) was applied in the oxidative desulfurization, and approximately 100% sulfur removal could be achieved in the model oil with hydrogen peroxide (30 wt %) as an oxidant. Moreover, the solid catalyst could be recovered readily and recycled at least six times without a significant decrease in the desulfurization efficiency. As for real diesel, we also observed that almost all of the original sulfur compounds could be converted in 120 min.

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Section: Resultsmentioning

confidence: 99%

Synthesis of a hypercrosslinked, ionic, mesoporous polymer monolith and its application in deep oxidative desulfurization

Jiang

Sun

Chen

et al. 2018

J of Applied Polymer Sci

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“…To the best of our knowledge, the catalytic properties of the Grubbs catalysts bearing imidazole ligands have rarely been described in the related chemical literature. Only Schanz's group [41,42] and Öztürk and coworker [43] reported that using ruthenium benzylidene complexes containing 1-methylimidazole and poly(N-vinylimidazole) in combination with an excess of mineral acids (H 3 PO 4 or HCl) to form 14 electron-active Ru complexes demonstrated its high performance in ROMP and CM reactions.…”

Section: Synthesis Of Catalysts 6a and 6bmentioning

confidence: 99%

Ruthenium Metathesis Catalysts with Imidazole Ligands

Zhang

et al. 2023

Catalysts

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Phosphine-free ruthenium benzylidene complexes containing imidazole ligands are reported. These catalysts are effective for ring-closing metathesis (RCM) and cross-metathesis (CM) reactions at high temperatures, where the more widely used phosphine-containing N-heterocyclic carbene-based ruthenium catalysts show side reactions. This discovery opens up a pathway to develop more selective ruthenium metathesis catalysts for reactions requiring harsh conditions.

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“…[1][2][3] Poly(vinylimidazoles) and their quarternized salts show potential in applications that range from non-toxic gene delivery vectors, 4,5 to fuel cells, [6][7][8][9][10] lithium ion batteries, 11 membranes for metal ion complexation 9,[12][13][14][15] and as molecularly imprinted matrices. 3,16 Moreover these polymers have been explored as carbon dioxide absorbing membranes, 17 anticorrosion coatings, 18 catalysts and catalyst supports, [19][20][21][22][23] for drug-delivery 24 and as polymerized ionic liquids. 3 The most widely used monomer that features an imidazole side chain is N-vinylimidazole (NVIm).…”

Section: Introductionmentioning

confidence: 99%