Smart covalent organic networks (CONs) with “on-off-on” light-switchable pores for molecular separation
Type
ArticleAuthors
Liu, Jiangtao
Wang, Shaofei

Huang, Tiefan
Manchanda, Priyanka

Abou-Hamad, Edy

Nunes, Suzana Pereira

KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionEnvironmental Science and Engineering Program
Imaging and Characterization Core Lab
NMR
Nanostructured Polymeric Membrane Lab
KAUST Grant Number
URF/1/3441-01-01Date
2020-08-19Online Publication Date
2020-08-19Print Publication Date
2020-08Submitted Date
2020-02-15Permanent link to this record
http://hdl.handle.net/10754/664744
Metadata
Show full item recordAbstract
Development of the new-generation membranes for tunable molecular separation requires materials with abilities beyond strict separation. Stimuli response could remotely adjust the membrane selectivity. Azobenzene derivatives can be photo-switched between trans and cis isomers under ultraviolet or visible light. Here, the azobenzenes were implanted as light switches to bridge the flexible cyclen building blocks. The smart covalent organic network membranes fold and unfold as origami that can be photo-switched between on-state (large) and off-state (small) pores. The cis membranes with off state under ultraviolet (UV) light have higher dye rejection than trans membranes with on-state channels. By controlling the trans-to-cis azobenzene isomerization via UV/Vis light, the pore size can be remotely controlled at the molecular level and the solvent permeance and dye rejection can be dynamically tuned.Citation
Liu, J., Wang, S., Huang, T., Manchanda, P., Abou-Hamad, E., & Nunes, S. P. (2020). Smart covalent organic networks (CONs) with “on-off-on” light-switchable pores for molecular separation. Science Advances, 6(34), eabb3188. doi:10.1126/sciadv.abb3188Sponsors
We thank L. Upadhyaya, D. Mahalingam, and B. Pulido for valuable assistance and fruitful discussion in the research process. The schematic illustration in Fig. 1 was produced by X. Pita, scientific illustrator at King Abdullah University of Science and Technology (KAUST)We thank King Abdullah University of Science and Technology for the financial support, particularly CRG grant URF/1/3441-01-01.
Journal
Science AdvancesAdditional Links
https://advances.sciencemag.org/lookup/doi/10.1126/sciadv.abb3188ae974a485f413a2113503eed53cd6c53
10.1126/sciadv.abb3188
Scopus Count
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