Ding et al.
Selective Reduction of Nitro Group in Aryl Halides Catalyzed by Silver Nanoparticles Modified with ꢀ-CD
Figure 7. UV-vis spectra of reduction process of 2-nitrobenzyl bromide and 4-nitrophenylethyl bromide catalyzed by AgNPs modified with ꢀ-CD.
of the system catalyzed by AgNPs modified with ꢀ-CD
was located at 283 nm, whereas that catalyzed by AgNPs
prepared by sodium citrate shifted to 288 nm accompa-
nied with the increase in absorption intensity. The phe-
nomenon may be due to the simultaneous reduction of
methyl bromide to methyl and then the push electron
effect of methyl promotes the red shift of B band. This
claim proposed by us was further confirmed by H NMR
spectra.
Finally, in order to investigate the suitable range of
selective catalysis of the AgNPs modified with ꢀ-CD,
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(
Acknowledgments: This work was supported by the
open project of the state key laboratory of bioelectronics
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J. Nanosci. Nanotechnol. 18, 8201–8206, 2018
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