Supramolecular Hydrogen-Bonded Oligo(p-phenylene vinylene) Polymers This work was supported by Netherlands Organization for Scientific Research (NWO) and the Royal Netherlands Academy of Arts and Sciences. The authors thank Michel Fransen for the synthesis of the starting materials, Joost van Dongen and Xiamwen Lou for matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) MS measurements, Pascal Jonkheijm for atomic force microsopy (AFM) measurements, and Dr. Rint Sijbesma for fruitful and helpful discussions. Prof. Dr. Jan C. Hummelen is acknowledged for a generous gift of phenyl-[6,6]-C(61)-butyric acid methyl ester (PCBM).