Fluorescence Patterning through Photoinduced Migration of Squaraine-Functionalized Azo Derivatives


  • The bilateral French–German DFG–CNRS program is gratefully acknowledged for postdoctoral funding and financial support, as well as Agnès Vignes from the DSI department (ENS Cachan) for the image processing. Supporting Information is available online from Wiley InterScience or from the author.


original image

New photochromic and fluorescent dyes are formed by covalently attaching emissive squaraine units to azo moieties. Illumination of doped matrices by light interference fringes provokes the reversible migration of the dyes and the formation of fluorescent gratings, as shown schematically in the figure. The visualization of the gratings is performed by using fluorescence confocal microscopy.