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 H, Bon V, Senkovska I, Ehrling S, Watanabe S, Ohba M, Kaskel S (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Dalton Transactions Royal Society of Chemistry

Book Volume: 46

Pages Range: 14002-14011

Journal Issue: 40

DOI: 10.1039/c7dt02809a

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.

Involved external institutions

Technische Universität Dresden DE Germany (DE) Kyoto University / 京都大学 Kyōto daigaku JP Japan (JP) Kyushu University / 九州大学 JP Japan (JP)

How to cite

APA:

Miura, H., Bon, V., Senkovska, I., Ehrling, S., Watanabe, S., Ohba, M., & Kaskel, S. (2017). Tuning the gate-opening pressure and particle size distribution of the switchable metal-organic framework DUT-8(Ni) by controlled nucleation in a micromixer. Dalton Transactions, 46(40), 14002-14011. https://doi.org/10.1039/c7dt02809a

MLA:

Miura, Hiroki, et al. "Tuning the gate-opening pressure and particle size distribution of the switchable metal-organic framework DUT-8(Ni) by controlled nucleation in a micromixer." Dalton Transactions 46.40 (2017): 14002-14011.

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