title: Helix stabilization through pyridinium-pi interactions.
abstract: Intramolecular cation-pi interactions between a methyl pyridinium ion and a phenyl ring stabilize the folded structure of a phenyleneethynylene oligomer.
authors.affiliation: Departments of Chemistry and Materials Science & Engineering, The University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA.
authors.forename: Jennifer M
authors.initials: JM
authors.lastname: Heemstra
authors.forename: Jeffrey S
authors.initials: JS
authors.lastname: Moore
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D002412:Cations; D004123:Dimethylamines / Q000737:chemistry; D004987:Ethers / Q000737:chemistry*; D008745:Methylation; D008968:Molecular Conformation; D011726:Pyridinium Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D012997:Solvents; D013816:Thermodynamics
chemical_list: D000480:Alkynes; D002412:Cations; D004123:Dimethylamines; D004987:Ethers; D011726:Pyridinium Compounds; D012997:Solvents; C436384:phenyleneethynylene