Grafting of paired 3-aminopropyltrialkoxy silanes onto mesoporous silica and adsorptions of isomers of benzenedialdehydes
Literature Information
Hideaki Yoshitake, Teruaki Koizumi, Izuru Kawamura, Akira Naito
A pair of 3-aminopropyltriethoxysilane molecules coupled with m- and p-benzenedialdehydes are grafted onto SBA-15 mesoporous silica, followed by the removal of benzenedialdehyde by hydrolysis. These paired 3-aminopropyl-grafted SBA-15, denoted (m)N- and (p)N-SBA-15, respectively, adsorb their own template benzenedialdehydes with a larger Langmuir constant KL than in other combinations of adsorbates and adsorbents. In addition, KL for the m-isomer is larger in the adsorption on (m)N-SBA-15 than on (p)N-SBA-15 and vice versa for the p-isomer. In contrast to this quadruple preference in the adsorption, a larger KL in the adsorption of the m-isomer onto the (m)N-adsorbent than onto the (p)N-adsorbent is the only adsorption preference that is observed in the case of Cab-O-sil M7D-based adsorbents prepared by the same procedure. The difference between the two kinds of silicas can be attributed to the surface curvature, concave or convex on a nanometre scale, which is supported by the evidence from spectroscopic analyses.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











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