Relating alkaline stability to the structure of quaternary phosphonium cations

Alkali-stable quaternary phosphonium (QP) is a type of cationic group for hydroxide exchange membranes (HEMs). To elucidate the relationship between structure and alkaline stability, we investigated the kinetics and degradation mechanism of a series of QP cations by both experiment and computation,...

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Detalles Bibliográficos
Autores principales: Zhang, Bingzi, Long, Hai, Kaspar, Robert B., Wang, Junhua, Gu, Shuang, Zhuang, Zhongbin, Pivovar, Bryan, Yan, Yushan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086583/
https://www.ncbi.nlm.nih.gov/pubmed/35547560
http://dx.doi.org/10.1039/c8ra03440k
Descripción
Sumario:Alkali-stable quaternary phosphonium (QP) is a type of cationic group for hydroxide exchange membranes (HEMs). To elucidate the relationship between structure and alkaline stability, we investigated the kinetics and degradation mechanism of a series of QP cations by both experiment and computation, and established a semi-empirical formula based on the Taft equation to directly estimate alkaline stability of QP cations from the (31)P NMR chemical shift δ and the steric substituent constant E(s), facilitating the search for QP cations with improved alkaline stability.

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