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Single-walled zeolitic nanotubes.

Akshay KordeByunghyun MinElina KapacaOmar KnioIman NezamZiyuan WangJohannes LeisenXinyang YinXueyi ZhangDavid S ShollXiaodong ZouTom WillhammarChristopher W JonesSankar Nair
Published in: Science (New York, N.Y.) (2022)
We report the synthesis and structure of single-walled aluminosilicate nanotubes with microporous zeolitic walls. This quasi-one-dimensional zeolite is assembled by a bolaform structure-directing agent (SDA) containing a central biphenyl group connected by C 10 alkyl chains to quinuclidinium end groups. High-resolution electron microscopy and diffraction, along with other supporting methods, revealed a unique wall structure that is a hybrid of characteristic building layers from two zeolite structure types, beta and MFI. This hybrid structure arises from minimization of strain energy during the formation of a curved nanotube wall. Nanotube formation involves the early appearance of a mesostructure due to self-assembly of the SDA molecules. The biphenyl core groups of the SDA molecules show evidence of π stacking, whereas the peripheral quinuclidinium groups direct the microporous wall structure.
Keyphrases
  • high resolution
  • electron microscopy
  • mass spectrometry
  • metal organic framework