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Bai T, Li CQ, Sun J, et al. Covalent modification of graphene oxide with carbazole groups for laser protection. Chemistry. 2015;21(12):4622-7doi: 10.1002/chem.201405509.
Bai, T., Li, C. Q., Sun, J., Song, Y., Wang, J., Blau, W. J., Zhang, B., & Chen, Y. (2015). Covalent modification of graphene oxide with carbazole groups for laser protection. Chemistry (Weinheim an der Bergstrasse, Germany), 21(12), 4622-7. https://doi.org/10.1002/chem.201405509
Bai, Ting, et al. "Covalent modification of graphene oxide with carbazole groups for laser protection." Chemistry (Weinheim an der Bergstrasse, Germany) vol. 21,12 (2015): 4622-7. doi: https://doi.org/10.1002/chem.201405509
Bai T, Li CQ, Sun J, Song Y, Wang J, Blau WJ, Zhang B, Chen Y. Covalent modification of graphene oxide with carbazole groups for laser protection. Chemistry. 2015 Mar 16;21(12):4622-7. doi: 10.1002/chem.201405509. Epub 2015 Jan 19. PMID: 25601509.
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Chemistry. 2015 Mar 16;21(12):4622-7. doi: 10.1002/chem.201405509. Epub 2015 Jan 19.

Covalent modification of graphene oxide with carbazole groups for laser protection.

Chemistry (Weinheim an der Bergstrasse, Germany)

Ting Bai, Cong-Qi Li, Jie Sun, Yi Song, Jun Wang, Werner J Blau, Bin Zhang, Yu Chen

Affiliations

  1. Key Laboratory for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237 (P. R. China).

PMID: 25601509 DOI: 10.1002/chem.201405509

Abstract

In the past decades, significant effort has been invested into the research and development of optical limiting materials and processes in order to develop practical solutions for the protection from laser beams. In this study, a new soluble graphene oxide based material (GO-Cz) has been synthesized through the covalent modification of graphene oxide (GO) with a carbazole derivative (Cz). The formation of an amido bond between the Cz group and GO has been confirmed by X-ray photoelectron and Fourier transform infrared spectroscopy. At the same concentration, both the nonlinear extinction coefficient and the imaginary third-order susceptibility were increased by a factor of ≈6.93 at 532 nm and ≈6.07 at 1064 nm relative to those of GO, as a result of the covalent grafting of the Cz moieties onto the GO surface. The GO-Cz dispersions exhibit a much better optical limiting performance than GO and GO/Cz blends at both 532 and 1064 nm due to the possible intramolecular electron-transfer between the GO and Cz moieties and the effective combination of the different nonlinear optical mechanisms.

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: carbazole; graphene; laser protection; materials science; nonlinear optics

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