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Zakharova, Maria V.,Masoumifard, Nima,Hu, Yimu,Han, Jongho,Kleitz, Freddy,Fontaine, Fré,dé,ric-Georges American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.15
<P>Conventional amines and phosphines, such as diethylenetriamine, diphenylpropylphosphine, triethylamine, and tetramethylpiperidine, were grafted or impregnated on the surface of metalated SBA-15 materials, such as <B>Ti</B>-, <B>Al</B>-, and <B>Zr</B>-SBA-15, to generate air-stable solid-supported Lewis acid-base pairs. The Lewis acidity of the metalated materials before and after the introduction of Lewis bases was verified by means of pyridine adsorption-Fourier transform infrared spectroscopy. Detailed characterization of the materials was achieved by solid-state <SUP>13</SUP>C and <SUP>31</SUP>P MAS NMR spectroscopy, low-temperature N<SUB>2</SUB> physisorption, X-ray photoelectron spectroscopy, and energy-dispersive X-ray mapping analyses. Study of their potential interactions with CO<SUB>2</SUB> was performed using CO<SUB>2</SUB> adsorption isotherm experiments, which provided new insights into their applicability as solid CO<SUB>2</SUB> adsorbents. A correlation between solid-supported Lewis acid-base pair strength and the resulting affinity to CO<SUB>2</SUB> is discussed based on the calculation of isosteric enthalpy of adsorption.</P> [FIG OMISSION]</BR>
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