title: Reversible Carbon-Carbon Bond Breaking and Spin Equilibria in Bis(pyrimidinenorcorrole).
abstract: Reversible homolytic dissociation of the bis(pyrimidinenorcorrole) σ-dimer was elucidated by means of variable temperature ESR and1H NMR spectroscopy, mass spectrometry, and optical spectrocopy. Dehydrogenation of the σ-dimer yielded another dimer displaying a singlet-triplet equilibrium in solution, strong NIR absorption (1570 nm), and a narrow electrochemical HOMO-LUMO gap (0.74 V).
authors.affiliation: Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Yoshida
authors.affiliation: Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, China. lixiaofang@iccas.ac.cn.
authors.forename: Xiaofang
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50383, Wrocław, Poland.
authors.forename: Marcin
authors.initials: M
authors.lastname: Stępień
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Shinokubo
authors.affiliation: Department of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50383, Wrocław, Poland. piotr.chmielewski@chem.uni.wroc.pl.
authors.forename: Piotr J
authors.initials: PJ
authors.lastname: Chmielewski
keywords: biradicals; free-radical dimerization; norcorrole; porphyrinoids; spin equilibria