Abstract
A novel synthetic method for immobilizing calixarene macrocycles onto the surface of silica is reported that does not require calixarene synthetic derivatization with a flexible tether. In part because of the rigidity of the linkage between the calixarene and the silica resulting from this method, immobilized site densities in excess of 0.2 mmol/g are obtained, which are the highest values reported to date on a per gram of material basis for anchored calixarenes on silica. The immobilized calixarenes contain lipophilic cavities that can be accessed with gas physisorption experiments at cryogenic temperatures, as well as with neutral organic molecular guests at room temperature. The toluene adsorption isotherm from aqueous solution clearly demonstrates a saturation coverage that is commensurate with formation of a 1:1 stoichiometric complex between the immobilized host and guest. The reversibility of adsorption within this class of materials is demonstrated with phenol, which is shown to bind reversibly via thermal desorption spectroscopy.
| Original language | English |
|---|---|
| Pages (from-to) | 3364-3368 |
| Number of pages | 5 |
| Journal | Chemistry of Materials |
| Volume | 14 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 2002 |
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ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)
Cite this
The first single-step immobilization of a calix-[4]-arene onto the surface of silica. / Katz, Alexander; Da Costa, Patrick; Lam, Angus Chun Pong; Notestein, Justin M.
In: Chemistry of Materials, Vol. 14, No. 8, 08.2002, p. 3364-3368.Research output: Contribution to journal › Article
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TY - JOUR
T1 - The first single-step immobilization of a calix-[4]-arene onto the surface of silica
AU - Katz, Alexander
AU - Da Costa, Patrick
AU - Lam, Angus Chun Pong
AU - Notestein, Justin M
PY - 2002/8
Y1 - 2002/8
N2 - A novel synthetic method for immobilizing calixarene macrocycles onto the surface of silica is reported that does not require calixarene synthetic derivatization with a flexible tether. In part because of the rigidity of the linkage between the calixarene and the silica resulting from this method, immobilized site densities in excess of 0.2 mmol/g are obtained, which are the highest values reported to date on a per gram of material basis for anchored calixarenes on silica. The immobilized calixarenes contain lipophilic cavities that can be accessed with gas physisorption experiments at cryogenic temperatures, as well as with neutral organic molecular guests at room temperature. The toluene adsorption isotherm from aqueous solution clearly demonstrates a saturation coverage that is commensurate with formation of a 1:1 stoichiometric complex between the immobilized host and guest. The reversibility of adsorption within this class of materials is demonstrated with phenol, which is shown to bind reversibly via thermal desorption spectroscopy.
AB - A novel synthetic method for immobilizing calixarene macrocycles onto the surface of silica is reported that does not require calixarene synthetic derivatization with a flexible tether. In part because of the rigidity of the linkage between the calixarene and the silica resulting from this method, immobilized site densities in excess of 0.2 mmol/g are obtained, which are the highest values reported to date on a per gram of material basis for anchored calixarenes on silica. The immobilized calixarenes contain lipophilic cavities that can be accessed with gas physisorption experiments at cryogenic temperatures, as well as with neutral organic molecular guests at room temperature. The toluene adsorption isotherm from aqueous solution clearly demonstrates a saturation coverage that is commensurate with formation of a 1:1 stoichiometric complex between the immobilized host and guest. The reversibility of adsorption within this class of materials is demonstrated with phenol, which is shown to bind reversibly via thermal desorption spectroscopy.
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U2 - 10.1021/cm020082l
DO - 10.1021/cm020082l
M3 - Article
VL - 14
SP - 3364
EP - 3368
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 8
ER -