title: A Chiral Hemiporphyrazine Derivative: Synthesis and Chiroptical Properties.
abstract: The synthesis of an optically active hemiporphyrazine with chiral binaphthyl substituents (1) is reported, providing the first example of the incorporation of an intrinsically chiral moiety into the macrocyclic core of a hemiporphyrazine analogue. A negative circular dichroism (CD) signal is observed in the 325-450 nm region of the CD spectrum of (S,S)-1, while mainly positive bands are observed in the 220-325 nm region. Mirror symmetry is observed across the entire wavelength range of the CD spectra of (R,R)-1 and (S,S)-1. An irreversible one-electron oxidation wave with an onset potential at 1.07 V is observed by cyclic voltammetry, along with a reversible one-electron reduction wave at -0.85 V. Density functional calculations reproduce the experimentally observed data and trends, and provide further insight into the nature of the electronic transitions.
authors.affiliation: Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, P. R. China.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Coordination Chemistry, Nanjing National Laboratoryof Microstructures, Nanjing University, Nanjing, 210093, P. R China.
authors.forename: Lizhi
authors.initials: L
authors.lastname: Gai
authors.affiliation: Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, P. R. China.
authors.forename: Xuqiong
authors.initials: X
authors.lastname: Xiao
authors.affiliation: Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, P. R. China. hualu@hznu.edu.cn.
authors.forename: Hua
authors.initials: H
authors.lastname: Lu
authors.affiliation: Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, P. R. China.
authors.forename: Zhifang
authors.initials: Z
authors.lastname: Li
authors.affiliation: Department of Chemistry, Rhodes University, Grahamstown, 6140, South Africa. j.mack@ru.ac.za.
authors.forename: John
authors.initials: J
authors.lastname: Mack
authors.affiliation: Department of Chemistry, Rhodes University, Grahamstown, 6140, South Africa.
authors.forename: Jessica
authors.initials: J
authors.lastname: Harris
authors.affiliation: Department of Chemistry, Rhodes University, Grahamstown, 6140, South Africa.
authors.forename: Tebello
authors.initials: T
authors.lastname: Nyokong
authors.affiliation: State Key Laboratory of Coordination Chemistry, Nanjing National Laboratoryof Microstructures, Nanjing University, Nanjing, 210093, P. R China. zshen@nju.edu.cn.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Shen
keywords: chirality; circular dichroism; computational chemistry; hemiporphyrazine; macrocycles