Tuning the gate-opening pressure and particle size distribution of the switchable metal-organic framework DUT-8(Ni) by controlled nucleation in a micromixer

Hiroki Miura, Volodymyr Bon, Irena Senkovska, Sebastian Ehrling, Satoshi Watanabe, Masaaki Ohba, Stefan Kaskel

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Controlled nucleation in a micromixer and further crystal growth were used to synthesize Ni2(2,6-ndc)2dabco (2,6-ndc-2,6-naphthalenedicarboxylate, dabco-1,4-diazabicyclo[2.2.2]octane), also termed DUT-8(Ni) (DUT = Dresden University of Technology), with narrow particle size distribution in a range of a few nm to several μm. The crystal size was found to significantly affect the switching characteristics, in particular the gate opening pressure in nitrogen adsorption isotherms at 77 K for this highly porous and flexible network. Below a critical size of about 500 nm, a type Ia isotherm typical of rigid MOFs is observed, while above approximately 1000 nm a pronounced gating behaviour is detected, starting at p/p0 = 0.2. With increasing crystal size this transition gate becomes steeper indicating a more uniform distribution of activation energies within the crystal ensemble. At an intermediate size (500-1000 nm), the DUT-8(Ni) crystals close during activation but cannot be reopened by nitrogen at 77 K possibly indicating monodomain switching.

Original languageEnglish
Pages (from-to)14002-14011
Number of pages10
JournalDalton Transactions
Volume46
Issue number40
DOIs
Publication statusPublished - Jan 1 2017

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Particle size analysis
Nucleation
Tuning
Metals
Crystals
Nitrogen
Crystallization
Adsorption isotherms
Isotherms
Activation energy
Chemical activation

All Science Journal Classification (ASJC) codes

  • Inorganic Chemistry

Cite this

Tuning the gate-opening pressure and particle size distribution of the switchable metal-organic framework DUT-8(Ni) by controlled nucleation in a micromixer. / Miura, Hiroki; Bon, Volodymyr; Senkovska, Irena; Ehrling, Sebastian; Watanabe, Satoshi; Ohba, Masaaki; Kaskel, Stefan.

In: Dalton Transactions, Vol. 46, No. 40, 01.01.2017, p. 14002-14011.

Research output: Contribution to journalArticle

Miura, Hiroki ; Bon, Volodymyr ; Senkovska, Irena ; Ehrling, Sebastian ; Watanabe, Satoshi ; Ohba, Masaaki ; Kaskel, Stefan. / Tuning the gate-opening pressure and particle size distribution of the switchable metal-organic framework DUT-8(Ni) by controlled nucleation in a micromixer. In: Dalton Transactions. 2017 ; Vol. 46, No. 40. pp. 14002-14011.
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