Functionalized NU-1000 with an Iridium Organometallic Fragment: SO2 Capture Enhancement

Saidulu Gorla; Mariana L Díaz-Ramírez; Niroshani S Abeynayake; David M Kaphan; Daryl R Williams; Vladimir Martis; Hugo A Lara-García; Bruno Donnadieu; Nazario Lopez; Ilich A Ibarra; Virginia Montiel-Palma

doi:10.1021/acsami.0c11615

Functionalized NU-1000 with an Iridium Organometallic Fragment: SO₂ Capture Enhancement

ACS Appl Mater Interfaces. 2020 Sep 16;12(37):41758-41764. doi: 10.1021/acsami.0c11615. Epub 2020 Sep 2.

Affiliations

¹ Department of Chemistry, Mississippi State University, P.O. Box 9573, Mississippi State, Mississippi 39762, United States.
² Laboratorio de Fisicoquímica y Reactividad de Superficies (LaFReS), Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior s/n, CU, Coyoacán 04510, Ciudad de México, Mexico.
³ Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States.
⁴ Surfaces and Particle Engineering Laboratory (SPEL), Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K.
⁵ Surface Measurement Systems, Unit 5, Wharfside, Rosemont Road, London HA0 4PE, U.K.
⁶ Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, CU, Coyoacán 04510, Ciudad de México, Mexico.
⁷ Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos 62209, Mexico.

PMID: 32808761
DOI: 10.1021/acsami.0c11615

Abstract

A new material, MOF-type [Ir]@NU-1000, was accessed from the incorporation of the iridium organometallic fragment [Ir{κ³(P,Si,Si)PhP(o-C₆H₄CH₂SiⁱPr₂)₂}] into NU-1000. The new material incorporates less than 1 wt % of Ir(III) (molar ratio Ir to NU-1000, 1:11), but the heat of adsorption for SO₂ is significantly enhanced with respect to that of NU-1000. Being a highly promising adsorbent for SO₂ capture, [Ir]@NU-1000 combines exceptional SO₂ uptake at room temperature and outstanding cyclability. Additionally, it is stable and can be regenerated after SO₂ desorption at low temperature.

Keywords: 14-electron complexes; adsorption; gas sensors; grafted organometallics; metal−organic frameworks; postsynthetic modifications; sawhorse geometry; silylphosphines; sulfur dioxide.