Revealing unconventional host-guest complexation at nanostructured interface by surface-enhanced Raman spectroscopy

Gan-Yu Chen; Yi-Bin Sun; Pei-Chen Shi; Tao Liu; Zhi-Hao Li; Si-Heng Luo; Xin-Chang Wang; Xiao-Yu Cao; Bin Ren; Guo-Kun Liu; Liu-Lin Yang; Zhong-Qun Tian

doi:10.1038/s41377-021-00526-5

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Revealing unconventional host-guest complexation at nanostructured interface by surface-enhanced Raman spectroscopy

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- Revealing unconventional host-guest complexation at nanostructured interface by surface-enhanced Raman spectroscopy
- Light: Science & Applications Vol. 10, Issue 5, Pages: 898-905(2021)
- Affiliations：
  
  1.State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
  2.State Key Laboratory of Marine Environmental Science, Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies, Center for Marine Environmental Chemistry & Toxicology, College of the Environment and Ecology, Xiamen University, Xiamen, 361102, China
  3.School of Electronic Science and Engineering (National Model Microelectronics College), Xiamen University, Xiamen, 361005, China
  4.Key Laboratory of Chemical Biology of Fujian Province, Xiamen University, Xiamen, 361005, China
- Author bio：
  
  Guo-Kun Liu (guokunliu@xmu.edu.cn)
  LiuLin Yang (llyang@xmu.edu.cn)
  Zhong-Qun Tian (zqtian@xmu.edu.cn)
- Funds：
- DOI：10.1038/s41377-021-00526-5
  CLC：
- Published：31 May 2021，
  
  Published Online：19 April 2021，
  
  Received：28 October 2020，
  
  Revised：20 March 2021，
  
  Accepted：31 March 2021
- Accepted：
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Chen, G. Y. et al. Revealing unconventional host-guest complexation at nanostructured interface by surface-enhanced Raman spectroscopy. Light: Science & Applications, 10, 898-905 (2021).
DOI：

Chen, G. Y. et al. Revealing unconventional host-guest complexation at nanostructured interface by surface-enhanced Raman spectroscopy. Light: Science & Applications, 10, 898-905 (2021). DOI： 10.1038/s41377-021-00526-5.

摘要

Abstract

Interfacial host-guest complexation offers a versatile way to functionalize nanomaterials. However

the complicated interfacial environment and trace amounts of components present at the interface make the study of interfacial complexation very difficult. Herein

taking the advantages of near-single-molecule level sensitivity and molecular fingerprint of surface-enhanced Raman spectroscopy (SERS)

we reveal that a cooperative effect between cucu

rbit[7

]

uril (CB[7

]

) and methyl viologen (MV

−

) in aggregating Au NPs originates from the cooperative adsorption of halide counter anions I

−

and CB[7

]

on Au NPs surface. Moreover

similar SERS peak shifts in the control experiments using CB[n

]

s but with smaller cavity sizes suggested the occurrence of the same guest complexations among CB[5

]

CB[6

]

and CB[7

]

with MV

. Hence

an unconventional exclusive complexation model is proposed between CB[7

]

and MV

on the surface of Au NPs

distinct from the well-known 1:1 inclusion complexation model in aqueous solutions. In summary

new insights into the fundamental understanding of host-guest interactions at nanostructured interfaces were obtained by SERS

which might be useful for applications related to host-guest chemistry in engineered nanomaterials.

关键词

Keywords

references

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