HIGH QUALITY COVALENT ORGANIC FRAMEWORKS:
A MODULATION APPROACH
Laurens Bourda*, Pascal Van Der Voort and Kristof Van Hecke
Department of Chemistry, Ghent University, Krijgslaan 281 (S3), 9000 Gent, Belgium www.chemistry.ugent.be - www.xstruct.ugent.be – www.comoc.ugent.be
Results
Contact
laurens.bourda@ugent.be
@BourdaLaurens Laurens Bourdah
Theoretical knowledge Practical approach
*Using procedure of: Chen et. al. JACS, 2019, 141, 3298-3303
Covalent Organic Frameworks?
Fully composed of covalent bonds
Intrinsically porous
23 different linkage types reported
9 2D and 14 3D topologies described
Easy functionalization by varying monomers
Predictable functionality & composition
Used as catalysts, adsorbents, sensors,…
Ma, T., Kapustin, E.A., Yin, S.Z., Liang, L.. Zhou, Z., Niu, J., Li, L., Wang, Y., Su, J., Li, J.. Wang, X., Wang, W.D., Wang, W., Sun, J., Yaghi, O.M., Science, 2018, 361, 48-52.
Chen, Y., Shi, Z.L., Wie, L., Zhou, B., Tan, J., Zhou, H.L., Zheng, Y.B., JACS, 2019, 141, 3298-3303 Bourda, L., Krishnaraj, C., Van Der Voort, P., Van Hecke, K., Materials Advances, 2021 – in press.
Modulation induces sharper peaks with higher signal over noise compared to the literature procedure.
Initially, amorphous precipitates are obtained. Over time precipitates slowly get rearranged to crystalline compounds (with appearance of some PXRD reflections). Finally, highly crystalline materials are formed.
65°C induces more rapid rearrangement to more crystalline material as compared to room temperature.
