Journal
CHINESE JOURNAL OF CHEMISTRY
Volume 40, Issue 3, Pages 385-391Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.202100612
Keywords
Catalysis; Fluorescence recognition; Nanoparticles; Cage compounds; Palladium
Categories
Funding
- National Natural Science Foundation of China [21631003, 21805005, 22175020]
- Fundamental Research Funds for the Central Universities [FRF-BD-20-14A]
- University of Science and Technology Beijing
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This study presents a new type of fluorescent porous organic cage with permanent voids and remarkable fluorescence properties, capable of sensing divalent Pd2+ ions. The organic cage also serves as a catalyst to reduce Pd2+ ions into nanoparticles for degradation of organic substances.
Comprehensive Summary Porous organic cages (POCs) as an innovative type of porous molecular materials enable multifunctional applications. Herein, a fluorescence POC (denoted as 1) has been constructed by means of 5,5'-((2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl))diisophthalaldehyde condensing with cyclohexanediamine enantiomer with the aid of trifluoroacetic acid. 1 exhibits the permanent void and prominent fluorescence with relative quantum yield of 73% confirmed by gas sorption and emission experiments, respectively. Moreover, this organic cage is capable of sensing diavalent Pd2+ according to the fluorescence response to the addition of various metal ions. The dispersion of 1 in methanol containing palladium acetate was stirred at 25 C-o and then 80 C-o to reduce Pd2+ ions into nanoparticles (NPs), leading to the composite (Pd@1) composed of fine Pd NPs with the size of ca. 1.8 nm. The catalytic nature of Pd@1 over NaBH4 promoted the degeneration of nitrobenzene and congo red. This work introduces one new case of POCs with versatile properties and functions, including ion fluorescence recognition, fine Pd NPs stabilizer, and gas adsorption, enriching the family of POC-based materials.
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