Covalent organic frameworks: efficient, metal-free, heterogeneous organocatalysts for chemical fixation of CO<sub>2</sub> under mild conditions

Zhi, Yongfeng; Shao, Pengpeng; Feng, Xiao; Xia, Hong; Zhang, Yumin; Shi, Zhan; Mu, Ying; Liu, Xiaoming

doi:10.1039/c7ta08629f

Cited by 255 publications

(166 citation statements)

References 79 publications

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“…[27][28][29] These materials are constructedf rom organic building blocks through reversible covalent bonds. Bhanage and co-workers [39] and Liu and co-workers [40] demonstrated that hydrogen bond donors (HBDs), such as OH-decorated COF materials, could be used as excellentc atalysts for the chemicalf ixation of CO 2 to cyclic carbonate. [33][34][35][36] In recent years, COFs have been employed as heterogeneous catalysts for the cycloaddition of epoxides with CO 2 .F or example, Roeser et al [37] and Yu et al [38] reported that covalent triazine frameworks composed of ah igh number of basic nitrogen sites efficiently catalyzed the cycloaddition of CO 2 with different starting epoxides.…”

Section: Introductionmentioning

confidence: 99%

Imidazolium‐Salt‐Functionalized Covalent Organic Frameworks for Highly Efficient Catalysis of CO₂ Conversion

Qiu¹,

Zhang²,

Li³

et al. 2019

ChemSusChem

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The conversion of CO2 into valuable chemicals is an ideal pathway for CO2 utilization in industry, although the development of highly efficient catalysts remains a challenge. Herein, the design and synthesis of two covalent organic frameworks (COFs) functionalized with imidazolium salts were reported as catalysts for CO2 conversion. The resultant COFs possessed highly crystalline structures, showed high stability and surface area, and contained dense catalytic active sites on the pore walls. They exhibited outstanding catalytic performances for the reaction of CO2 with epoxides without any solvent or cocatalyst under mild conditions and afforded a record turnover number of 495 000. In addition, the COFs could serve as effective catalysts in the reductive reaction of CO2 with amines. The results presented here thus demonstrate the exceptional potential of the functionalized COFs for various challenging CO2 transformations.

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Section: Introductionmentioning

confidence: 99%

Imidazolium‐Salt‐Functionalized Covalent Organic Frameworks for Highly Efficient Catalysis of CO₂ Conversion

Qiu¹,

Zhang²,

Li³

et al. 2019

ChemSusChem

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“…[3] Covalent organic frameworks (COFs), [6][7][8][9][10] crystallinep orousm aterials formed by the self-assembly of purely organic building blocks, have been explored for aw ide range of applications, such as optoelectronics, [11][12][13] gas storage, [14] and catalysis. [15][16][17][18][19][20][21][22] COFs have also shown promise as adsorbents for organic dyes, [23][24][25][26][27] mercury, [28,29] radionuclides, [30] and lanthanides, [31] as carriers for drug delivery, [32][33][34] and isolation of industriallyr elevant compounds. [35] Recently, we demonstrated that COFs can be used to efficientlyc apture marine toxin okadaic acid from seawater.…”

mentioning

confidence: 99%

Adsorption of Pharmaceutical Pollutants from Water Using Covalent Organic Frameworks

Mellah

Fernandes

Rodríguez³

et al. 2018

Chemistry A European J

124

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Capture of pharmaceutical pollutants from water was studied using a novel fluorine-bearing covalent organic framework TpBD-(CF ) , which showed ibuprofen adsorption capacity of 119 mg g at neutral pH. This value is further enhanced at pH 2, highlighting the potential of this class of materials to serve as adsorbents even under harsh conditions. The adsorbed pharmaceutical can be recovered from TpBD-(CF ) in high yield, offering the option of recycling both the adsorbent and the pharmaceutical. The high efficiency of ibuprofen capture as compared to other less lipophilic pharmaceuticals suggests that COFs can be pre-designed for selective capture of contaminants.

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“…[193] COFs wurden als Katalysatoren fürdie Cycloaddition von CO 2 mit Epoxiden zu cyclischen Carbonaten entwi- ckelt. [194][195][196] So fçrdern COF-JLU7, [197] CTF-CSU auf Carbazolbasis [198] und CCTF-350 auf Imidazoliumbasis [199] (Abbildung 47 a-c) die Reaktion mit einer Ausbeute von 99 %unter Umgebungsbedingungen. Diese COFs sind effizienter als Homogen-und andere Heterogenkatalysatoren.…”

Section: Angewandte Chemieunclassified

Kovalente organische Gerüstverbindungen: chemische Ansätze für Designerstrukturen und integrierte Funktionen

et al. 2019

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Die Fortschritte der Chemie im letzten Jahrzehnt ebnen neue Wege zur Gestaltung organischer Polymere über Topologiediagramme. Dieser Ansatz ermöglicht das kovalente Zusammenfügen organischer Einheiten zu geordneten Topologien einer neuen Polymerform, den kovalenten organischen Gerüstverbindungen. Dies bedeutet einen Durchbruch in der Chemie, da nunmehr eine molekulare Plattform für die Synthese von Polymeren mit vorbestimmbaren Primärstrukturen und Strukturen höherer Ordnung zur Verfügung steht, ein zentrales Ziel, das über ein Jahrhundert lang angestrebt wurde, mit herkömmlichen Gestaltungsprinzipien aber nicht erreichbar war. Das neue Gebiet entwickelt seine eigenen Eigenschaften, die sich von jenen herkömmlicher Polymere unterscheiden. Unser Aufsatz fasst die Grundlagen und wichtigsten Fortschritte zusammen, wobei der Schwerpunkt auf der Chemie des Strukturdesigns liegt, einschließlich der Grundgedanken, Synthesestrategien und Kontrollverfahren. Wir prüfen integrierte, für die Strukturen spezifische Funktionen, indem wir verschiedene Wechselspiele und Mechanismen aufzeigen, die an der Expression der Funktion beteiligt sind. Wir benennen grundlegende Probleme, die in der Chemie und in zukünftigen Forschungsrichtungen der Physik und Materialwissenschaft zu adressieren sind, und beschreiben Anwendungsmöglichkeiten.

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Covalent organic frameworks: efficient, metal-free, heterogeneous organocatalysts for chemical fixation of CO₂ under mild conditions

Abstract: Covalent organic frameworks with hydroxy groups in the pore wall, which exhibit efficient, metal-free, heterogeneous catalytic performances for chemical fixation of CO2 under mild conditions, are reported.

Cited by 255 publications

References 79 publications

Imidazolium‐Salt‐Functionalized Covalent Organic Frameworks for Highly Efficient Catalysis of CO₂ Conversion

Imidazolium‐Salt‐Functionalized Covalent Organic Frameworks for Highly Efficient Catalysis of CO₂ Conversion

Adsorption of Pharmaceutical Pollutants from Water Using Covalent Organic Frameworks

Kovalente organische Gerüstverbindungen: chemische Ansätze für Designerstrukturen und integrierte Funktionen

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Covalent organic frameworks: efficient, metal-free, heterogeneous organocatalysts for chemical fixation of CO2 under mild conditions

Abstract: Covalent organic frameworks with hydroxy groups in the pore wall, which exhibit efficient, metal-free, heterogeneous catalytic performances for chemical fixation of CO2 under mild conditions, are reported.

Cited by 255 publications

References 79 publications

Imidazolium‐Salt‐Functionalized Covalent Organic Frameworks for Highly Efficient Catalysis of CO2 Conversion

Imidazolium‐Salt‐Functionalized Covalent Organic Frameworks for Highly Efficient Catalysis of CO2 Conversion

Adsorption of Pharmaceutical Pollutants from Water Using Covalent Organic Frameworks

Kovalente organische Gerüstverbindungen: chemische Ansätze für Designerstrukturen und integrierte Funktionen

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Product

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Covalent organic frameworks: efficient, metal-free, heterogeneous organocatalysts for chemical fixation of CO₂ under mild conditions

Imidazolium‐Salt‐Functionalized Covalent Organic Frameworks for Highly Efficient Catalysis of CO₂ Conversion

Imidazolium‐Salt‐Functionalized Covalent Organic Frameworks for Highly Efficient Catalysis of CO₂ Conversion