Electronic Effects of Support Doping on Hydrotalcite-Supported Iridium N-Heterocyclic Carbene Complexes

Kai Wang; Jonathan Horlyck; Matthew T Finn; Marta Granollers Mesa; Adelina Voutchkova-Kostal

doi:10.1021/acsomega.2c02593

Electronic Effects of Support Doping on Hydrotalcite-Supported Iridium N-Heterocyclic Carbene Complexes

ACS Omega. 2022 Jul 6;7(28):24705-24713. doi: 10.1021/acsomega.2c02593. eCollection 2022 Jul 19.

Authors

Kai Wang¹, Jonathan Horlyck², Matthew T Finn¹, Marta Granollers Mesa³, Adelina Voutchkova-Kostal¹

Affiliations

¹ Department of Chemistry, The George Washington University, 800 22nd St NW, Washington, DC 20052, United States.
² Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States.
³ Energy and Bioproducts Research Institute (EBRI), Aston University, Aston Triangle, Birmingham B4 7ET, United Kingdom.

Abstract

The electronic effects of supports on immobilized organometallic complexes impact their activity and lifetime, yet remain poorly understood. Here we describe a systematic study of the support effects experienced by an organometallic complex immobilized on doped hydrotalcite-like materials. To that end, we describe the synthesis and characterization of the first organometallic species immobilized on a palette of doped hydrotalcites via sulfonate linkers. The organometallic species consists of iridium N-heterocyclic carbene (NHC) carbonyl complex ([Na][Ir-(NHC-Ph-SO₃)₂(CO)₂]), a highly active molecular catalyst for transfer hydrogenation of glycerol. The hydrotalcite supports are composed of Al, Mg, and a compatible transition-metal dopant (Fe, Cu, Ni, Zn). The materials were characterized extensively by STEM, XPS, TGA, PXRD, FT-IR, N₂ desorption, ICP-AES, TPD, and microcalorimetry to probe the morphology and electronic properties of the support and elucidate structure-property relationships.