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<p>A1/A2-Asymmetric difunctionalized pillar[5]arenes bearing either n-decyloxy and propargyloxy groups or n-octyloxy and propargyloxy groups are synthesized and investigated for their supramolecular assembly behavior under different crystallization conditions. Distinct crystal systems are obtained depending on the co-crystallization medium. Host–guest inclusion complexes with adiponitrile form when crystallization is carried out from solutions containing adiponitrile, whereas cyclic [<i>c2</i>] daisy chain (“double-threaded dimer”) architectures are produced from mixed chloroform/cyclohexane solutions. The resulting supramolecular assemblies are characterized by single crystal X-ray diffraction and Hirshfeld surface analyses. Variation in alkyl chain length (n-decyloxy versus n-octyloxy) on the pillar[5]arene framework exerts a pronounced effect on the non-covalent interactions and the consequent self-assembly modes within the crystal networks.</p> Graphical Abstract <p></p>

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Single-Crystal X-ray Diffraction Study of [c2] Daisy Chains and Inclusion Complexes from A1/A2-Functionalized Pillar[5]arenes with Variable Chain Lengths

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • Anshel Saldanha,
  • Mickey Vinodh,
  • Fatemeh H. Alipour,
  • Rajani Krishnapillai,
  • Nisha Manoj,
  • Talal F. Al-Azemi

摘要

A1/A2-Asymmetric difunctionalized pillar[5]arenes bearing either n-decyloxy and propargyloxy groups or n-octyloxy and propargyloxy groups are synthesized and investigated for their supramolecular assembly behavior under different crystallization conditions. Distinct crystal systems are obtained depending on the co-crystallization medium. Host–guest inclusion complexes with adiponitrile form when crystallization is carried out from solutions containing adiponitrile, whereas cyclic [c2] daisy chain (“double-threaded dimer”) architectures are produced from mixed chloroform/cyclohexane solutions. The resulting supramolecular assemblies are characterized by single crystal X-ray diffraction and Hirshfeld surface analyses. Variation in alkyl chain length (n-decyloxy versus n-octyloxy) on the pillar[5]arene framework exerts a pronounced effect on the non-covalent interactions and the consequent self-assembly modes within the crystal networks.

Graphical Abstract