Quaternary ammonium salt-functionalized chitosan: An easily recyclable catalyst for efficient synthesis of cyclic carbonates from epoxides and carbon dioxide

Yuan, Zhao; Tian, Jie‐Sheng; Qi, Xinhua; Han, Zhenan; Zhuang, Yanpei; He, Liang‐Nian

doi:10.1016/j.molcata.2007.03.047

Cited by 166 publications

(40 citation statements)

References 46 publications

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“…The catalytic species consisted of ammonium, phosphonium, and imidazolium-based ILs. The support materials included silicas [50][51][52][82][83][84][85], oxides [51], resins [82][83][84][85][86], zeolites [87,88] , and chitosan [89].…”

Section: Supported Ionic Liquidsmentioning

confidence: 99%

Ionic Liquids: The Synergistic Catalytic Effect in the Synthesis of Cyclic Carbonates

Cheng

Wang

et al. 2013

Catalysts

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This review presents the synergistic effect in the catalytic system of ionic liquids (ILs) for the synthesis of cyclic carbonate from carbon dioxide and epoxide. The emphasis of this review is on three aspects: the catalytic system of metal-based ionic liquids, the catalytic system of hydrogen bond-promoted ionic liquids and supported ionic liquids. Metal and ionic liquids show a synergistic effect on the cycloaddition reactions of epoxides. The cations and anions of ionic liquids show a synergistic effect on the cycloaddition reactions. The functional groups in cations or supports combined with the anions have a synergistic effect on the cycloaddition reactions. Synergistic catalytic effects of ILs play an important role of promoting the cycloaddition reactions of epoxides. The design of catalytic system of ionic liquids will be possible if the synergistic effect on a molecular level is understood.

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Section: Supported Ionic Liquidsmentioning

confidence: 99%

Ionic Liquids: The Synergistic Catalytic Effect in the Synthesis of Cyclic Carbonates

Cheng

Wang

et al. 2013

Catalysts

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“…The presence of readily functionalizable hydroxyl and amino groups on the chitosan and its insolubility in organic solvents make it very attractive in the application [19,20]. Besides, chitosan can be easily modified chemically or physically to become a versatile supporting material [21].…”

Section: Open Accessmentioning

confidence: 99%

Chitosan as a Natural Polymer for Heterogeneous Catalysts Support: A Short Review on Its Applications

2015

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Chitosan, a bio-based polymer which has similar characteristics to those of cellulose, exhibits cationic behavior in acidic solutions and strong affinity for metals ions. Thus, it has received increased attention for the preparation of heterogeneous catalysts. Recent studies demonstrated that chitosan-based catalysts had high sorption capacities, chelating activities, stability and versatility, which could be potentially applied as green reactants in various scientific and engineering applications. This study intends to review the recent development of chitosan-based catalysts, particularly in the aspects of the main mechanisms for preparing the materials and their applications in environmental green chemistry. Studies on the preparation of catalyst nanoparticles/nanospheres supported on chitosan were also reviewed.

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“…salts (Scheme 24). [144] The covalent anchorage was ascertained by FTIR, 1 H NMR, and 13 C NMR spectroscopy. Whereas native chitosan fails to catalyze this reaction, supported ammonium salts show comparable catalytic activities to those of homogeneous, low-molecular-weight salts with the additional advantages of being recoverable, reusable (up to five times without significant loss of their catalytic activity), and more sustainable.…”

Section: Synthesis Of Cyclic Carbonatesmentioning

confidence: 99%

Chitosan as a Sustainable Organocatalyst: A Concise Overview

Kadib

2014

ChemSusChem

209

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Increased demand for more sustainable materials and chemical processes has tremendously advanced the use of polysaccharides, which are natural biopolymers, in domains such as adsorption, catalysis, and as an alternative chemical feedstock. Among these biopolymers, the use of chitosan, which is obtained by deacetylation of natural chitin, is on the increase due to the presence of amino groups on the polymer backbone that makes it a natural cationic polymer. The ability of chitosan-based materials to form open-network, macroporous, high-surface-area hydrogels with accessible basic surface sites has enabled their use not only as macrochelating ligands for active metal catalysts and as a support to disperse nanosized particles, but also as a direct organocatalyst. This review provides a concise overview of the use of native and modified chitosan, possessing different textural properties and chemical properties, as organocatalysts. Organocatalysis with chitosan is primarily focused on carbon-carbon bond-forming reactions, multicomponent heterocycle formation reactions, biodiesel production, and carbon dioxide fixation through [3+2] cycloaddition. Furthermore, the chiral, helical organization of the chitosan skeleton lends itself to use in enantioselective catalysis. Chitosan derivatives generally display reactivity similar to homogeneous bases, ionic liquids, and organic and inorganic salts. However, the introduction of cooperative acid-base interactions at active sites substantially enhances reactivity. These functional biopolymers can also be easily recovered and reused several times under solvent-free conditions. These accomplishments highlight the important role that natural biopolymers play in furthering more sustainable chemistry.

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Quaternary ammonium salt-functionalized chitosan: An easily recyclable catalyst for efficient synthesis of cyclic carbonates from epoxides and carbon dioxide

Cited by 166 publications

References 46 publications

Ionic Liquids: The Synergistic Catalytic Effect in the Synthesis of Cyclic Carbonates

Ionic Liquids: The Synergistic Catalytic Effect in the Synthesis of Cyclic Carbonates

Chitosan as a Natural Polymer for Heterogeneous Catalysts Support: A Short Review on Its Applications

Chitosan as a Sustainable Organocatalyst: A Concise Overview

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