title: Delocalized hole domains in Guanine-rich DNA oligonucleotides.
abstract: Differential pulse voltammetries of guanine-rich single- and double-stranded oligonucleotides containing up to six consecutive guanines are reported. The observed progressive lowering of the first voltammetric peak potential as the number of adjacent guanines increases unambiguously points toward the establishment of delocalized hole domains; the hole stabilization energy is ca. 0.1 eV per GG step, significantly lower than that observed for AA steps.
authors.forename: Amedeo
authors.initials: A
authors.lastname: Capobianco
authors.forename: Tonino
authors.initials: T
authors.lastname: Caruso
authors.forename: Anna Maria
authors.initials: AM
authors.lastname: D'Ursi
authors.forename: Sandra
authors.initials: S
authors.lastname: Fusco
authors.affiliation: §Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, I-40129 Bologna, Italy.
authors.forename: Annalisa
authors.initials: A
authors.lastname: Masi
authors.forename: Mario
authors.initials: M
authors.lastname: Scrima
authors.affiliation: §Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Via P. Gobetti 101, I-40129 Bologna, Italy.|∥National Center for Scientific Research "Demokritos", Institute of Nanoscience and Nanotechnology, 15341 Agia Paraskevi, Athens, Greece.
authors.forename: Chryssostomos
authors.initials: C
authors.lastname: Chatgilialoglu
authors.forename: Andrea
authors.initials: A
authors.lastname: Peluso
mesh_terms: D004247:DNA / Q000737:chemistry*; D004563:Electrochemistry; D006147:Guanine; D009841:Oligonucleotides / Q000737:chemistry*; D010084:Oxidation-Reduction; D013816:Thermodynamics
chemical_list: D009841:Oligonucleotides; D006147:Guanine; D004247:DNA