Two-dimensional urea-and thiourea-containing covalent organic frameworks (COFs) were synthesized at ambient conditions at large scale within 1 h in the absence of an acid catalyst. The site-isolated urea and thiourea in the COF showed enhanced catalytic efficiency as a hydrogen-bond-donating organocatalyst compared to the molecular counterparts in epoxide ring-opening reaction, aldehyde acetalization, and Friedel-Crafts reaction. The COF catalysts also had excellent recyclability.
(Thio)urea-Based Covalent Organic Framework as a Hydrogen-Bond-Donating Catalyst / Hu, J., Zanca, F., Lambe, P., Tsuji, M., Wijeweera, S., Todisco, S., Mastrorilli, P., Shirley, W., Benamara, M., Moghadam, P.Z., Beyzavi, M.H.. - In: ACS APPLIED MATERIALS & INTERFACES. - ISSN 1944-8244. - STAMPA. - 12:26(2020), pp. 29212-29217. [10.1021/acsami.0c04957]
(Thio)urea-Based Covalent Organic Framework as a Hydrogen-Bond-Donating Catalyst
Todisco, Stefano;Mastrorilli, Piero;
2020
Abstract
Two-dimensional urea-and thiourea-containing covalent organic frameworks (COFs) were synthesized at ambient conditions at large scale within 1 h in the absence of an acid catalyst. The site-isolated urea and thiourea in the COF showed enhanced catalytic efficiency as a hydrogen-bond-donating organocatalyst compared to the molecular counterparts in epoxide ring-opening reaction, aldehyde acetalization, and Friedel-Crafts reaction. The COF catalysts also had excellent recyclability.| File | Dimensione | Formato | |
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