Crystallinity after decarboxylation of a metal-carboxylate framework : indestructible porosity for catalysis

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Peter Tieu
  • Wenpei Gao
  • Jieying Hu
  • Weijin Feng
  • Jun He
  • Xiaoqing Pan

Detail(s)

Original languageEnglish
Pages (from-to)11902-11910
Journal / PublicationDalton Transactions
Volume49
Issue number34
Online published24 Jul 2020
Publication statusPublished - 14 Sep 2020

Abstract

We report a curious case study of a Zr(IV)-carboxylate framework, which retains significant crystalline order after cascade thermocyclization of its linker components, and - more notably - after the crucial carboxylate links were severed by heat. Vigorous heat treatment (e.g., 450 °C and above) benzannulates the multiple alkyne groups on the linker to generate linked nanographene blocks and to afford real stability. The resultant Zr oxide/nanographene hybrid solid is stable in saturated NaOH and concentrated H3PO4, allowing a convenient anchoring of H3PO4 into its porous matrix to enable size-selective heterogeneous acid catalysis. The Zr oxide components can also be removed by strong hydrofluoric acid to further enhance the surface area (up to 650 m2 g-1), without collapsing the nanographene scaffold. The crystallinity order and the extensive thermal transformations were characterized by X-ray diffraction, scanning transmission electron microscopy (STEM), IR, solid state NMR and other instrumental methods.

Citation Format(s)

Crystallinity after decarboxylation of a metal-carboxylate framework : indestructible porosity for catalysis. / Cheng, Shengxian; Tieu, Peter; Gao, Wenpei; Hu, Jieying; Feng, Weijin; He, Jun; Pan, Xiaoqing; Xu, Zhengtao.

In: Dalton Transactions, Vol. 49, No. 34, 14.09.2020, p. 11902-11910.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review