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Tailoring the Surface and Solubility Properties of Nanocrystalline Titania by a Nonaqueous In Situ Functionalization Process

Tailoring the Surface and Solubility Properties of Nanocrystalline Titania by a Nonaqueous In Situ Functionalization Process

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NIEDERBERGER, Markus, Georg GARNWEITNER, Frank KRUMEICH, Reinhard NESPER, Helmut CÖLFEN, Markus ANTONIETTI, 2004. Tailoring the Surface and Solubility Properties of Nanocrystalline Titania by a Nonaqueous In Situ Functionalization Process. In: Chemistry of Materials. 16(7), pp. 1202-1208. ISSN 0897-4756. eISSN 1520-5002. Available under: doi: 10.1021/cm031108r

@article{Niederberger2004-04Tailo-40467, title={Tailoring the Surface and Solubility Properties of Nanocrystalline Titania by a Nonaqueous In Situ Functionalization Process}, year={2004}, doi={10.1021/cm031108r}, number={7}, volume={16}, issn={0897-4756}, journal={Chemistry of Materials}, pages={1202--1208}, author={Niederberger, Markus and Garnweitner, Georg and Krumeich, Frank and Nesper, Reinhard and Cölfen, Helmut and Antonietti, Markus} }

Nesper, Reinhard Cölfen, Helmut Krumeich, Frank Nesper, Reinhard Krumeich, Frank eng Garnweitner, Georg The reaction between titanium tetrachloride and benzyl alcohol in the presence of enediol ligands such as dopamine and 4-tert-butylcatechol provides a simple nonaqueous route to in situ surface functionalization of titania nanoparticles. The as-prepared precipitates are resoluble either in water or in organic solvents, depending on the ligand used. The surface chemistry of the 4-tert-butylcatechol-functionalized particles dissolved in dimethylformamide was analyzed by <sup>1</sup>H NMR measurements revealing the presence of adsorbed 4-tert-butylcatechol, in addition to benzyl alcohol and water. Although the reaction temperatures of 70 or 80 °C are relatively low, XRD and HRTEM investigations give evidence that the as-synthesized nanoparticles are highly crystalline. Ultracentrifugation analysis of dopamine-functionalized titania nanoparticles dissolved in water shows a particle size distribution of approximately 3.5−8 nm with the peak maximum at 5.5 nm. Furthermore, the UV−vis detector system of the ultracentrifuge allows the measurement of the absorption spectra dependent on the particle size, showing an unusual red shift with decreasing particle size. Cölfen, Helmut Tailoring the Surface and Solubility Properties of Nanocrystalline Titania by a Nonaqueous In Situ Functionalization Process Garnweitner, Georg 2004-04 Antonietti, Markus Antonietti, Markus 2017-11-02T09:36:52Z 2017-11-02T09:36:52Z Niederberger, Markus Niederberger, Markus

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