Yang, Q.; Sun, L. X.; Gao, W. T.; Zhu, Z. Y.; Gao, X.; Zhang, Q. G.; Zhu, A. M.; Liu, Q. L. published their research in Journal of Colloid and Interface Science in 2021. The article was titled 《Crown ether-based anion exchange membranes with highly efficient dual ion conducting pathways》.Formula: C6H12Br2 The article contains the following contents:
Anion exchange membranes (AEMs) are a crucial constituent for alk. fuel cells. As the core component of fuel cells, the low performance AEMs restrict the development and application of the fuel cells. Herein, the trade-off between the OH- conductivity and dimensional stability was solved by constructing AEMs with adequate OH- conductivity and satisfactory alkali resistance using Troger′s base (TB) poly (crown ether)s (PCEs) as the main chain, the embedded quaternary ammonium (QA) and Na+-functionalized crown ether units as the cationic group. Crown ether is an electron donator, and can capture Na+ to form Na+-functionalized crown ether units to conveniently transfer OH- and significantly promote the alk. stability of the AEMs. The influence of the Na+-functionalized crown ether units on the performance of AEMs was studied in detail. The PCEs based AEMs show an obvious hydrophobic-hydrophilic microphase separation These features make them ideal platforms for the OH- conduction applications. As expected, the as-prepared PCEs-QA-100% (100% is the degree of crosslinking) AEM with an ionic exchange capacity (IEC) of 2.07 meq g-1 has a high OH- conductivity of 159 mS cm-1 at 80 °C. Furthermore, the membrane electrode assemblies fabricated using the PCEs-QA-100% AEM possess a maximum power d. of 291 mW cm-2 under the c.d. of 500 mA cm-2. In addition to this study using 1,6-Dibromohexane, there are many other studies that have used 1,6-Dibromohexane(cas: 629-03-8Formula: C6H12Br2) was used in this study.
1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of solvent processable and conductive polyfluorene ionomers for alkaline fuel cell applications; synthesis of cross-linkable regioregular poly(3-(5-hexenyl)thiophene) (P3HNT) for stabilizing the film morphology in polymer photovoltaic cells.Formula: C6H12Br2
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary