Structural chemistry and selective CO2uptake of a piperazine-derived porous coordination polymer

Hawes, Chris S.; White, Keith F.; Abrahams, Brendan F.; Knowles, Gregory P.; Chaffee, Alan L.; Batten, Stuart R.; Turner, David R.

Abstract

A new piperazine-derived ligand has been prepared and used to synthesise a porous coordination polymer which displays selective carbon dioxide uptake after solvent exchange and thermal activation. The ligand N,N′-bis(4-carboxyphenylmethylene)piperazine H2L1 was prepared from piperazine in three steps and good yield. A structure containing the deprotonated form K2L1·2H2O was determined and consists of a three-dimensional coordination polymer containing inorganic K2(COO)2(OH2) layers separated by the long organic bridging linker. The free compound H2L1 displays a one-dimensional hydrogen-bonded polymeric structure in the solid state with hydrogen bonding interactions between carboxylic acids and piperazine groups tightly linking molecules together. The two-dimensional polymeric complex [Zn3(L1)2(OH)2]·2DMF·0.5H2O 1 was prepared and analysed in the solid state to reveal tubular one-dimensional channels which, when activated by solvent exchange and evacuation, displayed selective affinity for CO2 over N2 and H2.

Citation

Hawes, C. S., White, K. F., Abrahams, B. F., Knowles, G. P., Chaffee, A. L., Batten, S. R., & Turner, D. R. (in press). Structural chemistry and selective CO2uptake of a piperazine-derived porous coordination polymer. CrystEngComm, 17(10), 2196-2203. https://doi.org/10.1039/c4ce02547d

• Journal Article Type: Article
• Acceptance Date: Jan 19, 2015
• Online Publication Date: Jan 23, 2015
• Deposit Date: Jun 16, 2023
• Journal: CrystEngComm
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 17
• Issue: 10
• Pages: 2196-2203
• DOI: https://doi.org/10.1039/c4ce02547d
• Keywords: Condensed Matter Physics; General Materials Science; General Chemistry
• Additional Information: : This document is CrossCheck deposited; : Supplementary Information; : Crystal Structure Data; : Stuart R. Batten (ORCID); : Stuart R. Batten (ResearcherID); : David R. Turner (ORCID); : David R. Turner (ResearcherID); : The Royal Society of Chemistry has an exclusive publication licence for this journal; : Received 29 December 2014; Accepted 19 January 2015; Accepted Manuscript published 23 January 2015; Advance Article published 16 February 2015; Version of Record published 23 March 2015