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-SO
3
)
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, N
2
desorption, ICP-AES, TPD, and microcalorimetry to probe the
morphology and electronic properties of the support and elucidate
structure–property relationships.
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