Meine Merkliste
my.chemie.de  
Login  

Covalent Triazine Frameworks as Heterogeneous Catalysts for the Synthesis of Cyclic and Linear Carbonates from Carbon Dioxide and Epoxides

Abstract

The base catalytic properties of a series of triazine‐based covalent organic frameworks were evaluated for the conversion of CO2 to organic carbonates. The high number of basic nitrogen sites of the as‐synthesized frameworks efficiently catalyzed the formation of cyclic carbonates via the cycloaddition of CO2 to different starting epoxides. The structural and chemical tunability of the covalent triazine frameworks allowed the fine evaluation of key parameters influencing the observed catalytic activities. An increased surface area and presence of additional mesopores dramatically enhance the activity of the investigated catalytic materials. The chemical composition was also found to influence the reaction, as evidenced by an increased activity at lower reaction temperatures, when a more basic, pyridine‐based, framework was used as catalyst. Finally, the activity in the two‐step cycloaddition/transesterification catalysis of dimethyl carbonate was evaluated in a one‐batch process.

CO2 with COF: Triazine‐based covalent organic frameworks are efficiently used as heterogeneous catalysts in the conversion of CO2 to cyclic and linear carbonates. The catalytic activity is influenced by small chemical and structural modifications of the synthesized materials.

<!--Unmatched element: w:blockFixed-->

Autoren:   Jérôme Roeser, Kamalakannan Kailasam, Arne Thomas
Journal:   ChemSusChem
Jahrgang:   2012
Seiten:   n/a
DOI:   10.1002/cssc.201200091
Erscheinungsdatum:   16.08.2012
Mehr über Wiley
Ihr Bowser ist nicht aktuell. Microsoft Internet Explorer 6.0 unterstützt einige Funktionen auf Chemie.DE nicht.