Fm pdf to Word Converter Pro

Part of the problem chemists have


with molecule-based systems is


connecting them to the macroscopic


world. One approach is to modify a


nanocrystalline surface with


supramolecular components. For


example, a ruthenium complex bound


to nanocrystalline titanium dioxide


gives a supramolecular structure that


undergoes photochemically driven


electron- and energy-transfer


processes. This makes them


attractive materials for use in solar


cells²⁰. Supramolecular aggregates of


organic molecules have also been


used to make molecular switches,


whose conductivity is controlled by


the chemical state of the molecule.


Chemical sensors based on such


switches could in theory be used to


detect individual molecules of a


pollutant.