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Photoinduced activation of CO 2 by rhenium complexes encapsulated in molecular sieves
Author(s) -
SungSuh Hyung Mi,
Kim Dae Sung,
Lee Chul Wee,
Park SangEon
Publication year - 2000
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/1099-0739(200012)14:12<826::aid-aoc94>3.0.co;2-o
Subject(s) - rhenium , molecular sieve , chemistry , photochemistry , fourier transform infrared spectroscopy , mesoporous material , infrared spectroscopy , photoluminescence , photocatalysis , inorganic chemistry , adsorption , catalysis , organic chemistry , chemical engineering , materials science , optoelectronics , engineering
Abstract The photochemical activation and reduction of CO 2 over a molecular‐sieve‐encapsulated rhenium complex was investigated under photoirradiation (λ > 350 nm ) at room temperature. Re(CO) 3 (bpy)Cl and [Re(CO) 3 (bpy)(py)] + were respectively encapsulated in the microporous NaY and the mesoporous AlMCM‐41 molecular sieve acting as supramolecular heterogeneous host. The molecular‐sieve‐encapsulated rhenium complexes were characterized by diffuse reflectance (DR) ultraviolet–visible (UV–vis), photoluminescence, and Fourier transform infrared (FTIR) spectroscopy. The interaction between the excited state of encapsulated rhenium complexes and the adsorbed CO 2 was observed in photoluminescence spectra. The radicals of rhenium complexes encapsulated in NaY and AlMCM‐41 were produced with photoirradiation and confirmed by DR UV–vis spectra. By monitoring the photoreaction of CO 2 over the molecular‐sieve‐encapsulated rhenium complexes using FTIR spectroscopy and gas chromatography, the conversion of CO 2 into CO and carbonate species was observed. The molecular‐sieve‐encapsulated rhenium complexes showed photocatalytic activity for the activation and reduction of CO 2 . Copyright © 2000 John Wiley & Sons, Ltd.