Recent progress in controlling the photoluminescence properties of single-walled carbon nanotubes by oxidation and alkylation

The functionalization of single-walled carbon nanotubes (SWCNTs) has received considerable attention in the last decade since highly efficient near-infrared photoluminescence (PL) has been observed to be red-shifted compared with the intrinsic PL peak of pristine SWCNTs. The PL wavelength has been manipulated using arylation reactions with aryldiazonium salts and aryl halides. Additionally, simple oxidation and alkylation reactions have proven effective in extensively adjusting the PL wavelength, with the resulting PL efficiency varying based on the chosen reaction techniques and molecular structures. This review discusses the latest developments in tailoring the PL attributes of SWCNTs by oxidation and alkylation processes. (6,5) SWCNTs exhibit intrinsic emission at 980 nm, and the PL wavelength can be controlled in the range of 1100-1320 nm by chemical modification. In addition, recent developments in chiral separation techniques have increased our understanding of the control of the PL wavelength, extending to the selection of excitation and emission wavelengths, by chemical modification of SWCNTs with different chiral indices. This review comprehensively summarizes the tuning of the near-infrared photoluminescent properties of single-walled carbon nanotubes via oxidation and alkylation.

Automated summary

This review summarizes the latest research progress in tailoring the near-infrared photoluminescent properties of single-walled carbon nanotubes through oxidation and alkylation. The emission wavelength of SWCNTs can be controlled in the range of 1100-1320 nm by chemical modification, and recent developments in chiral separation techniques have increased our understanding of the control of emission wavelength by chemical modification of SWCNTs with different chiral indices.