Open Access Article
This Open Access Article is licensed under a Creative Commons Attribution 3.0 Unported Licence
DOI: 10.1039/D1RA90113C
(Retraction)
RSC Adv., 2021, 11, 16200-16200
Retraction: Metal-free [2+2+1] cycloaddition polymerization of alkynes, nitriles, and oxygen atoms to functional polyoxazoles
Lichao Dong*,
Tian Lan,
Yin Liang,
Shifeng Guo and
Hao Zhang
The 306th Institute of China Aerospace Science & Industry Corp., Beijing, 100074, China. E-mail: 610557405@qq.com
Received
26th April 2021
, Accepted 26th April 2021
First published on 30th April 2021
Abstract
Retraction of ‘Metal-free [2+2+1] cycloaddition polymerization of alkynes, nitriles, and oxygen atoms to functional polyoxazoles’ by Lichao Dong et al., RSC Adv., 2020, 10, 24368–24373, DOI: 10.1039/D0RA04249H.
We, the named authors, hereby wholly retract this RSC Advances article as there is insufficient data to support the structure of the final polymer product, and therefore, the conclusions are not fully supported. In Fig. 1 the peaks of the 1H-NMR spectrum are stacked together and therefore the spectrum cannot be used as proof of the polymer structure. In Fig. 2, the 13C-NMR spectrum, the peaks on the benzene ring cannot correspond to before and after polymerization. Therefore, further research and characterization work is needed to determine the structure of the resulting polymer.
The corresponding authors regret this oversight and apologise for any inconvenience to readers.
Signed: Lichao Dong, Tian Lan, Yin Liang, Shifeng Guo and Hao Zhang
Date: 18 April 2021
Retraction endorsed by Laura Fisher, Executive Editor, RSC Advances
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