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Base Promoted Intumescence of Phenols.
Polymers (Basel). 2020 Jan 23; 12(2)P

Abstract

: The intumescent process of sodium (substituted) phenolates has been studied. The generation of hydrogen radical via a homolytic cleavage of the Ar-H bond and the subsequent hydroarylation of phenolates to cyclohexadienes along with cyclization and elimination reactions of cyclohexadienes are critical steps in the base promoted intumescence of phenols. The substituents show great influence on the intumescence of phenolates. Phenolates substituted with a weak electron donating group enable intumescence while those with an electron withdrawing group or strong electron donating group suppresses intumescence. This distinction can be justified by both electronic and steric effects of substituents on the generation of hydrogen radical and the degree of hydroarylation.

Authors+Show Affiliations

Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. University of Chinese Academy of Sciences, Beijing 100049, China.Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. University of Chinese Academy of Sciences, Beijing 100049, China. Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo 315201, China.Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.Ningbo Key Laboratory of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31979373

Citation

Ji, Yu, et al. "Base Promoted Intumescence of Phenols." Polymers, vol. 12, no. 2, 2020.
Ji Y, Yao Q, Cao W, et al. Base Promoted Intumescence of Phenols. Polymers (Basel). 2020;12(2).
Ji, Y., Yao, Q., Cao, W., & Zhao, Y. (2020). Base Promoted Intumescence of Phenols. Polymers, 12(2). https://doi.org/10.3390/polym12020261
Ji Y, et al. Base Promoted Intumescence of Phenols. Polymers (Basel). 2020 Jan 23;12(2) PubMed PMID: 31979373.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Base Promoted Intumescence of Phenols. AU - Ji,Yu, AU - Yao,Qiang, AU - Cao,Weihong, AU - Zhao,Yueying, Y1 - 2020/01/23/ PY - 2019/12/28/received PY - 2020/01/17/revised PY - 2020/01/17/accepted PY - 2020/1/26/entrez PY - 2020/1/26/pubmed PY - 2020/1/26/medline KW - alkali KW - hydroarylation KW - intumescence KW - phenolate KW - substituent JF - Polymers JO - Polymers (Basel) VL - 12 IS - 2 N2 - : The intumescent process of sodium (substituted) phenolates has been studied. The generation of hydrogen radical via a homolytic cleavage of the Ar-H bond and the subsequent hydroarylation of phenolates to cyclohexadienes along with cyclization and elimination reactions of cyclohexadienes are critical steps in the base promoted intumescence of phenols. The substituents show great influence on the intumescence of phenolates. Phenolates substituted with a weak electron donating group enable intumescence while those with an electron withdrawing group or strong electron donating group suppresses intumescence. This distinction can be justified by both electronic and steric effects of substituents on the generation of hydrogen radical and the degree of hydroarylation. SN - 2073-4360 UR - https://www.unboundmedicine.com/medline/citation/31979373/Base_Promoted_Intumescence_of_Phenols L2 - https://www.mdpi.com/resolver?pii=polym12020261 DB - PRIME DP - Unbound Medicine ER -
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