Scholarlink

<p>Linker engineering has emerged as a powerful design strategy for the discovery of novel metal-organic framework (MOF) structures with enhanced or unconventional properties. However, the rational design of organic linkers to direct the formation of Al-based MOF structures remains underexplored, largely due to challenges in synthesizing Al-based MOF single crystals. Herein, by leveraging linker functionalization, we report the synthesis of a new MOF (NU-62) constructed by methyl-functionalized hexacarboxylate linker in combination with trinuclear Al clusters. The steric hindrance introduced by the methyl groups restricts the connectivity of the trinuclear Al units, resulting in the coexistence of two distinct 4-connected clusters in the rectangular and tetrahedral configurations within the same framework. This leads to the formation of a unique NU-62 structure with an unprecedented (4,4,6)-connected topology. In contrast, the non-functionalized analogue generates the anticipated (6,6)-connected <b>nia</b> topology, NU-61, with the common trigonal-prismatic 6-connected trinuclear Al cluster. Owing to its nonpolar pore environments, NU-62 exhibits efficient inverse separation of ethane over ethylene under both dry and humid conditions, whereas NU-61 shows no separation capability. These results highlight the utility of linker functionalization in accessing structurally diverse Al-based MOFs with unique topologies and properties.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Tuning linker steric hindrance to enrich structural diversity of aluminum metal-organic frameworks for ethane/ethylene separation

  • 期刊论文

  • 发表日期：

    2026年2月3日

查看全文
  • Yiwei Xue,
  • Zi-Ming Ye,
  • Yonghua Zhong,
  • Xianhui Tang,
  • Daofei Lv,
  • Fanrui Sha,
  • Haomiao Xie,
  • Chenghui Zhang,
  • Xiaoliang Wang,
  • Yongwei Chen,
  • Zhibo Li

摘要

Linker engineering has emerged as a powerful design strategy for the discovery of novel metal-organic framework (MOF) structures with enhanced or unconventional properties. However, the rational design of organic linkers to direct the formation of Al-based MOF structures remains underexplored, largely due to challenges in synthesizing Al-based MOF single crystals. Herein, by leveraging linker functionalization, we report the synthesis of a new MOF (NU-62) constructed by methyl-functionalized hexacarboxylate linker in combination with trinuclear Al clusters. The steric hindrance introduced by the methyl groups restricts the connectivity of the trinuclear Al units, resulting in the coexistence of two distinct 4-connected clusters in the rectangular and tetrahedral configurations within the same framework. This leads to the formation of a unique NU-62 structure with an unprecedented (4,4,6)-connected topology. In contrast, the non-functionalized analogue generates the anticipated (6,6)-connected nia topology, NU-61, with the common trigonal-prismatic 6-connected trinuclear Al cluster. Owing to its nonpolar pore environments, NU-62 exhibits efficient inverse separation of ethane over ethylene under both dry and humid conditions, whereas NU-61 shows no separation capability. These results highlight the utility of linker functionalization in accessing structurally diverse Al-based MOFs with unique topologies and properties.