Highly selective room temperature acetylene sorption by an unusual triacetylenic phosphine MOF

Joseph E Reynolds; Kelly M Walsh; Bin Li; Pranaw Kunal; Banglin Chen; Simon M Humphrey

doi:10.1039/c8cc05402a

Highly selective room temperature acetylene sorption by an unusual triacetylenic phosphine MOF

Chem Commun (Camb). 2018 Sep 14;54(71):9937-9940. doi: 10.1039/c8cc05402a. Epub 2018 Aug 17.

Authors

Joseph E Reynolds¹, Kelly M Walsh¹, Bin Li², Pranaw Kunal¹, Banglin Chen², Simon M Humphrey¹

Affiliations

¹ Department of Chemistry, The University of Texas at Austin, 100 East 24th Street, Stop A1590, Austin, Texas 78712, USA. smh@cm.utexas.edu.
² Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, USA. banglin.chen@utsa.edu.

PMID: 30116816
DOI: 10.1039/c8cc05402a

Abstract

The new ligand tris(p-carboxyphenylethynyl)phosphine (P{C[triple bond, length as m-dash]CC₆H₄-4-CO₂H}₃) was used to synthesize a permanently porous Mn(ii)-based acetylenic phosphine coordination material, PCM-48. This triply-interpenetrated MOF contains 1-D microchannels that are decorated with electron-rich and adsorbate-accessible acetylenic moieties and phosphine lone pairs. PCM-48 has a moderate room-temperature C₂H₂ adsorption capacity (25.54 cm³ g^-1) and displays high separation selectivities for C₂H₂ over CH₄ (C₂H₂/CH₄ = 23.3), CO₂ (C₂H₂/CO₂ = 4.3), and N₂ (C₂H₂/N₂ = 76.9) at 296 K.