TY - JOUR A1 - Ostwaldt, Jan-Erik A1 - Hirschhäuser, Christoph A1 - Maier, Stefan K. A1 - Schmuck, Carsten A1 - Niemeyer, Jochen T1 - Supramolecular polymers with reversed viscosity/temperature profile for application in motor oils JF - Beilstein Journal of Organic Chemistry PY - 2021/// VL - 17 SP - 105 EP - 114 SN - 1860-5397 DO - 10.3762/bjoc.17.11 PB - Beilstein-Institut JA - Beilstein J. Org. Chem. UR - https://doi.org/10.3762/bjoc.17.11 KW - noncovalent interactions KW - polymers KW - ring-chain transformation KW - supramolecular chemistry KW - viscosity N2 - We report novel supramolecular polymers, which possess a reversed viscosity/temperature profile. To this end, we developed a series of ditopic monomers featuring two self-complementary binding sites, either the guanidiniocarbonyl pyrrole carboxylic acid (GCP) or the aminopyridine carbonyl pyrrole carboxylic acid (ACP). At low temperatures, small cyclic structures are formed. However, at elevated temperatures, a ring–chain transformation leads to the formation of a supramolecular polymer. We demonstrate that this effect is dependent on the concentration of the solution and on the polarity of the solvent. This effect can counteract the loss of viscosity of the solvent at elevated temperatures, thus opening an application of our systems as viscosity index improvers (VIIs) in working fluids. This was tested for different motor oils and led to the identification of one compound as a promising VII. ER -