Ratiometric multimodal chemosensors based on cubic silsesquioxanes for monitoring solvent polarity

We report the multi-functionalized cubic silsesquioxane (POSS) as the ratiometric multimodal chemosensors for monitoring solvent polarity with fluorescence and F-19 NMR. The alteration of the dispersion state of the modified POSS by changing solvent polarity can be reflected into the orthogonal signal responses for the fluorescence and F-19 NMR. In addition, the ratiometric dual monitoring for the enzymatic reaction was performed using the POSS-based chemosensor. (c) 2008 Elsevier Ltd. All rights reserved.