English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A family of NaY zeolite-supported iridium clusters was prepared by reductive carbonylation of Ir(CO) 2 (acac) sorbed in the zeolite pores to form Ir 6 (CO) 16 , which was decarbonylated by treatment in He. This method allowed preparation of samples with Ir contents as high as 33.0 wt.%. Extended X-ray absorption fine structure spectra of the decarbonylated samples indicate that the clusters are well approximated as octahedral Ir 6  in the zeolite cages. The high loadings of clusters in the zeolite allowed characterization of the hydride ligands on the clusters by  1 H NMR spectroscopy and inelastic neutron scattering spectroscopy. These ligands exist on the clusters even in the absence of H 2  in the gas phase, presumably equilibrated with OH groups on the zeolite. The data indicate both terminal and bridging hydride ligands on the clusters. The H/Ir atomic ratio is estimated to be approximately 0.01 on the basis of the  1 H NMR data and thermogravimetric analysis of the sample.

zeitschrift für physikalische chemie

Zeolite-Encaged Iridium Clusters with Hydride Ligands: Characterization by Extended X-Ray Absorption Fine Structure, NMR, and Inelastic Neutron Scattering Vibrational Spectroscopies