Facilitated transport membrane containing a zero complex Ag₄tz₄ and 6FDA-TMPDA was fabricated via a solution-casting method and their separation performance toward C₃H₆/C₃H₈ was investigated. Ag₄tz₄ complexes were well dispersed in the polymeric matrix owing to the weak hydrogen bond between Ag₄tz₄ and 6FDA-TMPDA which can efficiently improve their interface compatibility. The reversible π complexation between C₃H₆ and Ag⁺ facilitates the C₃H₆ transport in membranes, which is beneficial to achieve high C₃H₆/C₃H₈ permselectivity according to the density functional theory calculation. Remarkably, the best separation performance was achieved by the 10 wt% Ag₄tz₄ membrane, for which the C₃H₆ permeability is 22 Barrer and the C₃H₆/C₃H₈ selectivity reaches up to 43, surpassing the Robeson upper bound. In addition, the membranes also exhibit great long-term stability (>120 h). The excellent separation performance together with the long-term stability render the membrane to be an interesting candidate for C₃H₆/C₃H₈ separation.

中文翻译：

---

在含有多银复合物的促进传输膜中增强丙烯/丙烷分离

通过溶液浇铸法制备了含有零复合Ag ₄ tz ₄和6FDA-TMPDA的易化传输膜，并研究了它们对C ₃ H ₆ /C ₃ H ₈的分离性能。由于Ag ₄ tz ₄和6FDA-TMPDA之间的弱氢键可以有效提高它们的界面相容性，Ag ₄ tz ₄配合物在聚合物基体中分散良好。C ₃ H ₆和 Ag ⁺之间的可逆 π 络合促进了 C ₃ H ₆根据密度泛函理论计算，在膜中传输，这有利于实现高C ₃ H ₆ /C ₃ H ₈渗透选择性。值得注意的是，最好的分离性能是由 10 wt% Ag ₄ tz ₄膜实现的，其 C ₃ H ₆渗透率为 22 Barrer，C ₃ H ₆ /C ₃ H ₈选择性达到43，超过Robeson上限。此外，膜还表现出很好的长期稳定性（> 120 小时）。优异的分离性能和长期稳定性使该膜成为 C ₃ H ₆ /C ₃ H ₈分离的重要候选者。