Synthesis, Bifunctionalization, and Remarkable Adsorption Performance of Benzene‐Bridged Periodic Mesoporous Organosilicas Functionalized with High Loadings of Carboxylic Acids. Issue 20 (19th March 2013)

• Record Type: Journal Article
• Authors: Wu, Hao‐Yiang; Shieh, Fa‐Kuen; Kao, Hsien‐Ming; Chen, Yi‐Wen; Deka, Juti Rani; Liao, Shih‐Hsiang; Wu, Kevin C.‐W.
• Is Part Of: Chemistry. Volume 19:Issue 20(2013)
• Page Start: 6358
• Page End: 6367
• Publication Date: 2013-03-19
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201204400
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Highly ordered benzene‐bridged periodic mesoporous organosilicas (PMOs) that were functionalized with exceptionally high loadings of carboxylic acid groups (COOH), up to 80 mol % based on silica, have been synthesized and their use as adsorbents for the adsorption of methylene blue (MB), a basic dye pollutant, and for the loading and release of doxorubicin (DOX), an anticancer drug, is demonstrated. These COOH‐functionalized benzenesilicas were synthesized by the co‐condensation of 1, 4‐bis(triethoxysilyl) benzene (BTEB) and carboxyethylsilanetriol sodium salt (CES), an organosilane that contained a carboxylic acid group, in the presence of non‐ionic oligomeric surfactant Brij 76 in acidic medium. The materials thus obtained were characterized by a variety of techniques, including powder X‐ray diffraction (XRD), nitrogen‐adsorption/desorption isotherms, TEM, and ¹³C and ²⁹Si solid‐state NMR spectroscopy. Owing to the exceptionally high loadings of COOH groups, their high surface areas, and possible ππ‐stacking interactions, these adsorbents have very high adsorption capacities and extremely rapid adsorption rates for MB removal and for the controlled loading/release of DOX, thus manifesting their great potential for environmental and biomedical applications.</p> </abstract>