The rich activated protons and effective proton-conducting paths are of importance to improve conductivities of conductors. Herein, a series of Brönsted acids as proton carrier and proton transfer sites is introduced into the highly stable MOF, contributing to create plentiful hydrogen bonds within frameworks. Consequently, the trifluoromethanesulfonic acid-embedded JUC-1000 ([Cu(BDPO)(HO)]) displays the relatively highest conductivity of 7.04 × 10 S cm under ∼98% RH and 328 K, ∼16 times that of JUC-1000 (4.47 × 10 S cm). When TMSA@JUC-1000 (TMSA = CFSOH) blended with chitosan (CS), the proton conductivity of TMSA@JUC-1000/CS-15 is the highest at ∼76% RH and 328 K (1.01×10 S cm), which is six times higher than that of JUC-1000/CS (1.85×10 S cm). The CS contains abundant –NH and –OH groups as proton jumping sites, which would activate the –NH– or –OH bonds of JUC-1000 and the acidic groups in Brönsted acids. These would result in an increased content of activated protons and effective formation of H-bonding nets by acid-base interactions. The findings provide valuable insights into the potential application of MOFs materials in energy devices.

中文翻译：

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活化质子和酸碱对对亚氨基功能化 MOF 杂化膜中质子传导的影响


丰富的活化质子和有效的质子传导路径对于提高导体的电导率具有重要意义。在此，一系列布朗斯台德酸作为质子载体和质子转移位点被引入高度稳定的MOF中，有助于在框架内产生丰富的氢键。因此，三氟甲磺酸嵌入的 JUC-1000 ([Cu(BDPO)(H2O)]) 在~98% RH 和 328K 下表现出相对最高的电导率，为 7.04 × 10 Scm，是 JUC-1000 的~16 倍（ 4.47 × 10 Scm）。当TMSA@JUC-1000 (TMSA = CFSOH)与壳聚糖(CS)混合时，TMSA@JUC-1000/CS-15的质子电导率在∼76% RH和328K (1.01×10 Scm)下最高，比JUC-1000/CS（1.85×10 Scm）高6倍。 CS含有丰富的–NH和–OH基团作为质子跳跃位点，这会激活JUC-1000的–NH–或–OH键以及布朗斯台德酸中的酸性基团。这些将导致活化质子含量增加，并通过酸碱相互作用有效形成氢键网络。这些发现为 MOF 材料在能源设备中的潜在应用提供了宝贵的见解。