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A reversible phase transition of 2D coordination layers by B–H···Cu(II) interactions in a coordination polymer

A reversible phase transition of 2D coordination layers by B–H···Cu(II) interactions in a coordination polymer
A reversible phase transition of 2D coordination layers by B–H···Cu(II) interactions in a coordination polymer

Materials that combine flexibility and open metal sites are crucial for myriad applications. In this article, we report a 2D coordination polymer (CP) assembled from CuII ions and a flexible meta-carborane-based linker [Cu2(L1)2(Solv)2]•xSolv (1-DMA, 1-DMF, and 1-MeOH; L1: 1,7-di(4-carboxyphenyl)-1,7-dicarba-closo-dodecaborane). 1-DMF undergoes an unusual example of reversible phase transition on solvent treatment (i.e., MeOH and CH2Cl2). Solvent exchange, followed by thermal activation provided a new porous phase that exhibits an estimated Brunauer-Emmett-Teller (BET) surface area of 301 m2 g−1 and is capable of a CO2 uptake of 41 cm3 g−1. The transformation is reversible and 1-DMF is reformed on addition of DMF to the porous phase. We provide evidence for the reversible process being the result of the formation/cleavage of weak but attractive B–H···Cu interactions by a combination of single-crystal (SCXRD), powder (PXRD) X-ray diffraction, Raman spectroscopy, and DFT calculations.

Boron hydrides, Carborane, Metal-organic frameworks, Open metal sites, Reversible phase transition
1420-3049
Gan, Lei
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Fonquernie, Pol G.
c0ab6e80-cdf8-4f04-aa69-01c04e253e34
Light, Mark E.
cf57314e-6856-491b-a8d2-2dffc452e161
Norjmaa, Gantulga
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Ujaque, Gregori
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Choquesillo-Lazarte, Duane
b96b9413-2131-44ce-880c-243a1c00e234
Fraile, Julio
b156bd1b-1d41-4296-b54c-2baa0134c6e1
Teixidor, Francesc
d24b81b5-5d82-42ca-bd30-fd9c73d0ee68
Viñas, Clara
636b5d2e-fefb-4e83-93df-9615eee8e771
Planas, José G.
98b21b50-1c21-4265-bd3c-67afe28ef652
Gan, Lei
e361ae76-bd0b-4847-b4ce-3e6cd5241ce5
Fonquernie, Pol G.
c0ab6e80-cdf8-4f04-aa69-01c04e253e34
Light, Mark E.
cf57314e-6856-491b-a8d2-2dffc452e161
Norjmaa, Gantulga
7d673d3d-4748-492e-b034-d5e788d78c96
Ujaque, Gregori
1b00c44c-8775-41b2-81fa-6770047469c1
Choquesillo-Lazarte, Duane
b96b9413-2131-44ce-880c-243a1c00e234
Fraile, Julio
b156bd1b-1d41-4296-b54c-2baa0134c6e1
Teixidor, Francesc
d24b81b5-5d82-42ca-bd30-fd9c73d0ee68
Viñas, Clara
636b5d2e-fefb-4e83-93df-9615eee8e771
Planas, José G.
98b21b50-1c21-4265-bd3c-67afe28ef652

Gan, Lei, Fonquernie, Pol G., Light, Mark E., Norjmaa, Gantulga, Ujaque, Gregori, Choquesillo-Lazarte, Duane, Fraile, Julio, Teixidor, Francesc, Viñas, Clara and Planas, José G. (2019) A reversible phase transition of 2D coordination layers by B–H···Cu(II) interactions in a coordination polymer. Molecules, 24 (17), [3204]. (doi:10.3390/molecules24173204).

Record type: Article

Abstract

Materials that combine flexibility and open metal sites are crucial for myriad applications. In this article, we report a 2D coordination polymer (CP) assembled from CuII ions and a flexible meta-carborane-based linker [Cu2(L1)2(Solv)2]•xSolv (1-DMA, 1-DMF, and 1-MeOH; L1: 1,7-di(4-carboxyphenyl)-1,7-dicarba-closo-dodecaborane). 1-DMF undergoes an unusual example of reversible phase transition on solvent treatment (i.e., MeOH and CH2Cl2). Solvent exchange, followed by thermal activation provided a new porous phase that exhibits an estimated Brunauer-Emmett-Teller (BET) surface area of 301 m2 g−1 and is capable of a CO2 uptake of 41 cm3 g−1. The transformation is reversible and 1-DMF is reformed on addition of DMF to the porous phase. We provide evidence for the reversible process being the result of the formation/cleavage of weak but attractive B–H···Cu interactions by a combination of single-crystal (SCXRD), powder (PXRD) X-ray diffraction, Raman spectroscopy, and DFT calculations.

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Accepted/In Press date: 1 September 2019
Published date: 3 September 2019
Keywords: Boron hydrides, Carborane, Metal-organic frameworks, Open metal sites, Reversible phase transition

Identifiers

Local EPrints ID: 434743
URI: http://eprints.soton.ac.uk/id/eprint/434743
ISSN: 1420-3049
PURE UUID: 481b0208-867c-4f45-99b3-17560b013c0e
ORCID for Mark E. Light: ORCID iD orcid.org/0000-0002-0585-0843

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Date deposited: 08 Oct 2019 16:30
Last modified: 18 Feb 2021 16:52

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Contributors

Author: Lei Gan
Author: Pol G. Fonquernie
Author: Mark E. Light ORCID iD
Author: Gantulga Norjmaa
Author: Gregori Ujaque
Author: Duane Choquesillo-Lazarte
Author: Julio Fraile
Author: Francesc Teixidor
Author: Clara Viñas
Author: José G. Planas

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