A series of polycyclic aromatic hydrocarbon-substituted metal-free porphyrins: Substituent effect on two-photon absorption property. (July 2017)

• Record Type: Journal Article
• Authors: Sheng, Ning; Gu, Bing; Ren, Boxiao; Zhang, Jing; Wang, Yingying; Wang, Jingxia; Sha, Jingquan
• Is Part Of: Dyes and pigments. Volume 142(2017)
• Page Start: 116
• Page End: 120
• Publication Date: 2017-07
• Subjects: Porphyrin -- Two-photon absorption -- Polycyclic aromatic hydrocarbon -- Femtosecond-pulsed Z-scan technique -- Substituent effect -- Intramolecular energy transfer; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2017.03.018
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: The third-order nonlinear optical properties of a series of naphthyl, phenanthrenyl, and pyrenyl substituted porphyrins have been comparatively investigated by performing the femtosecond-pulsed Z-scan measurements. Due to the expanded π system, both pyrenly substituted porphyrin (1 ) and phenanthrenly substituted porphyrin (2 ) exhibit large two-photon absorption cross sections up to 4.26 × 10 4 GM for1 and 1.36 × 10 4 GM for2 at the wavelength of 800 nm. The pyrenly substituted porphyrin (1 ) has the most excellent two-photon absorption property because of the intramolecular energy transfer from the excited pyrene moiety to the porphyrin moiety in porphyrin1 . The results confirm that porphyrins conjugated with external π electronic systems can lead to the significant enhancement in the two-photon absorption cross-section values. This research provides a useful guideline to the design of efficient two-photon absorbing materials. Highlights: The third-order nonlinear optical properties of naphthyl, phenanthrenyl, and pyrenyl substituted porphyrins have been investigated. Both the pyrenly-substituted porphyrin and the phenanthrenly - substituted porphyrin exhibit large two-photon absorption cross sections. The pyrenly-substituted porphyrin has the most excellent 2PA property because of the intramolecular fluorescence energy transfer.