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- W4247312301 abstract "Better carbon capture materials are crucial for managing today’s and the future CO<sub>2</sub> level in the atmosphere. The past focus was on increasing adsorption capacities. One knows by now that controlling the heat of adsorption (DH<sub>ads</sub>) is equally important. Is it too low, CO<sub>2</sub> uptake takes place at unfavorable conditions far from ambient and with insufficient selectivity. Is it too high, chemisorption occurs, and the materials can hardly be regenerated. The conventional approach for influencing DH<sub>ads</sub> is the modification of the adsorbing center. This paper proposes an alternative strategy. The hypothesis is that fine-tuning of the molecular environment in direct vicinity to the adsorbing center (primary amines) is a powerful tool for the adjustment of CO<sub>2</sub>-binding properties. Via click chemistry, any desired neighboring group (NG) can be incorporated on the surfaces of the resulting bifunctional, nanoporous organosilica materials. Passive NGs induce a change of the polarity of the surface, whereas active NGs are capable of a direct interaction with the active-center/ CO<sub>2</sub>pair. The effects on DH<sub>ads</sub> and also on the selectivity are studied in detail. A situation can be realized on the surface which resembles frustrated Lewis acid-base pairs, and the investigation of the binding-species by <sup>13</sup>C solid-state NMR indicate that the push-pull effects could play an essential role not only for CO<sub>2 </sub>adsorption but also for its activation." @default.
- W4247312301 created "2022-05-12" @default.
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- W4247312301 date "2020-11-16" @default.
- W4247312301 modified "2023-09-26" @default.
- W4247312301 title "Great Location: About Effects of Surface Bound Neighboring Groups for Passive and Active Fine-Tuning of CO2 Adsorption Properties in Carbon Capture Materials" @default.
- W4247312301 doi "https://doi.org/10.26434/chemrxiv.13234877" @default.
- W4247312301 hasPublicationYear "2020" @default.
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