Metal Functionalized Diketopyrrolopyrroles: A Promising Class of Materials for Optoelectronic Applications.

After first report on diketopyrrolopyrrole in 1974 by Farnum et al., a wide variety of its derivatives have been reported for material and biological applications. In this review we discuss various design strategies used for the synthesis of metal functionalized diketopyrrolopyrrole derivatives along with their photophysical and electrochemical studies with respect to material and biological applications. Some exciting applications of ferrocenyl functionalized diketopyrrolopyrrole derivatives such as non-linear optics, organic solar cells and photothermal therapy were recently reported, which are also discussed in this review.