Fluorescence Probing of Solvent Accessibility and Micropolarity on Silica and Alkylated Silica Surfaces

✍ Scribed by Marcel J. Bartels; Mattijs Koeberg; Jan W. Verhoeven

• Book ID: 101280899
• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 156 KB
• Volume: 1999
• Category: Article
• ISSN: 1434-193X
• DOI: 10.1002/(sici)1099-0690(199909)1999:9<2391::aid-ejoc2391>3.0.co;2-2

✦ Synopsis

The highly solvatochromic probe "Fluoroprobe", which to a quite homogeneous distribution of the probes without extensive local clustering. On silica the probe experiences a fluoresces in a wide range of the visible spectrum, was covalently attached to silica and alkylated silica particles to local dielectric constant of ε = 6, while its solvent accessibility is ca. 30%. On alkylated silica this reduces to ε = 3.4 and ca. study solvent accessibility and surface micropolarity. A two step attachment method was used which was found to lead 23% respectively.