Chen, Nanjun; Jin, Yiqi; Liu, Haijun; Hu, Chuan; Wu, Bo; Xu, Shaoyi; Li, Hui; Fan, Jiantao; Lee, Young Moo published their research in Angewandte Chemie, International Edition in 2021. The article was titled 《Insight into the Alkaline Stability of N-Heterocyclic Ammonium Groups for Anion-Exchange Polyelectrolytes》.Related Products of 1445-73-4 The article contains the following contents:
The alk. stability of N-heterocyclic ammonium (NHA) groups is a critical topic in anion-exchange membranes (AEMs) and AEM fuel cells (AEMFCs). Here, we report a systematic study on the alk. stability of 24 representative NHA groups at different hydration numbers (λ) at 80°C. The results elucidate that γ-substituted NHAs containing electron-donating groups display superior alk. stability, while electron-withdrawing substituents are detrimental to durable NHAs. D.-functional-theory calculations and exptl. results suggest that nucleophilic substitution is the dominant degradation pathway in NHAs, while Hofmann elimination is the primary degradation pathway for NHA-based AEMs. Different degradation pathways determine the alk. stability of NHAs or NHA-based AEMs. AEMFC durability (from 1 A cm-2 to 3 A cm-2) suggests that NHA-based AEMs are mainly subjected to Hofmann elimination under 1 A cm-2 c.d. for 1000 h, providing insights into the relationship between c.d., λ value, and durability of NHA-based AEMs. In the part of experimental materials, we found many familiar compounds, such as 1-Methyl-4-piperidone(cas: 1445-73-4Related Products of 1445-73-4)
1-Methyl-4-piperidone(cas: 1445-73-4) is a member of piperidine. Piperidine-containing compounds are also frequently employed in synthesis as ligands or auxiliaries. Accordingly, many efforts have been devoted to the development of novel methods for the synthesis of these compounds over the years.Related Products of 1445-73-4
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem