Donor-Sigma-Acceptor (D-sigma-A) Molecules With Perylenebisimide Acceptors Having Alkyl or Peg Swallowtails With Sulfur or Hydroxyl Anchors: Synthesis and Applications in Langmuir-Blodgett Films, Single Molecule Spectroscopy (SMS), G-Quadruplex Studies and Passivation of Gold Nanoparticles