title: Nonlinear optical properties as a guide to aromaticity in congeneric pentapyrrolic expanded porphyrins: pentaphyrin, sapphyrin, isosmaragdyrin, and orangarin.
abstract: On the basis of two-photon absorption and time-resolved spectroscopic measurements, as supported by theoretical calculations of quantitative aromaticity, a relationship between the nonlinear optical properties and aromaticity index has been established for a series of four fully conjugated pentapyrrolic expanded porphyrins, namely pentaphyrin (1.1.1.1.1), sapphyrin (1.1.1.1.0), isosmaragdyrin (1.1.1.0.0), and orangarin (1.0.1.0.0), all of which proved amenable to study in dichloromethane.
authors.affiliation: Department of Chemistry, Yonsei University, Seoul 120-749, Korea.
authors.forename: Zin Seok
authors.initials: ZS
authors.lastname: Yoon
authors.forename: Dong-Gyu
authors.initials: DG
authors.lastname: Cho
authors.forename: Kil Suk
authors.initials: KS
authors.lastname: Kim
authors.forename: Jonathan L
authors.initials: JL
authors.lastname: Sessler
authors.forename: Dongho
authors.initials: D
authors.lastname: Kim
mesh_terms: D011166:Porphyrins / Q000737:chemistry*; D011789:Quantum Theory; D019265:Spectroscopy, Near-Infrared; D013057:Spectrum Analysis
chemical_list: D011166:Porphyrins; C440448:sapphyrin