Photochromic Switches Incorporated in Bridging Ligands: A New Tool to Modulate Energy-Transfer Processes


  • We are grateful to the Swiss National Science Foundation for funding through the NFP47 program. We also thank the EC (contract G5RD-CT-2002–00776, MWFM) for financial support. Supporting Information is available online from Wiley InterScience or from the author.


The thoughful construction of molecular switches has led to a gamut of supramolecular systems that can be used in molecular electronics. These include molecules based on thienylethenes, spiropyrans, fulgides, dithienylphenanthrolines, and diazafluorenes. This article reviews the recent developments made in the synthesis and characterization of all these systems, thereby allowing a comparative study to validate the viability of these switchable molecules on a nanoscale. Also, the drawbacks of each class are demonstrated and, at the same time, the remedies for further improvisation are prescribed. We have made an honest attempt to present an exhaustive account of all the different photochromic switches developed by us hitherto.