LAUSR

Probing the assembly mechanism, orientation, shape, and structure function relationship of hybrid supramolecular materials is an outstanding challenge. In this regard, we have presented a novel method based on fluorescence spectroscopic Mueller matrix measurements and inverse analysis which can probe and quantify exclusive information on the molecular organization and orientation via a set of newly defined fluorescence anisotropy parameters, namely, fluorescence diattenuation and polarizance. A new dipeptide motif Boc-Xaa-Met-OMe (Xaa = Val/Leu) containing leucine, valine, and methionine forms a kink like structure and self-associates to form a twisted sheet like structure by multiple intermolecular N–H···O hydrogen bonds and finally grown to form supramolecular nanotubes having a diameter ca. 10 A. Thus, the methionine sulfurs of peptide molecules are arranged helically along the tubes, work as a hot spot, and help to stabilize the electron deficient paint TB-NDI around the tube. The fluorescence Mueller...