Nonlinear optical properties as a guide to aromaticity in congeneric pentapyrrolic expanded porphyrins: pentaphyrin, sapphyrin, isosmaragdyrin, and orangarin.
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.
Yoon
Zin Seok
ZS
Department of Chemistry, Yonsei University, Seoul 120-749, Korea.
Cho
Dong-Gyu
DG
Kim
Kil Suk
KS
Sessler
Jonathan L
JL
Kim
Dongho
D
D011166:Porphyrins / Q000737:chemistry*; D011789:Quantum Theory; D019265:Spectroscopy, Near-Infrared; D013057:Spectrum Analysis
D011166:Porphyrins; C440448:sapphyrin