title: Conjugated polymers with pyrrole as the conjugated bridge: synthesis, characterization, and two-photon absorption properties.
abstract: The synthesis, one- and two-photon absorption (2PA) and emission properties of two novel pyrrole-based conjugated polymers (P1 and P2) are reported. They emitted strong yellow-green and orange fluorescence with fluorescent quantum yields (Φ) of 46 and 33%, respectively. Their maximal 2PA cross sections (δ) measured by the two-photon-induced fluorescence method using femtosecond laser pulses in THF were 2392 and 1938 GM per repeating unit, respectively, indicating that the 2PA chromophores consisting of the triphenylamine with nonplanar structure as the donor and electron-rich pyrrole as the conjugated bridge could be the effective repeating units to enhance the δ values.
authors.affiliation: Department of Chemistry, Hubei Key Laboratory on Organic and Polymeric Opto-Electronic Materials, Wuhan University, 430072, PR China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Li
authors.forename: Cheng
authors.initials: C
authors.lastname: Zhong
authors.forename: Jing
authors.initials: J
authors.lastname: Huang
authors.forename: Zhenli
authors.initials: Z
authors.lastname: Huang
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Pei
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.forename: Jingui
authors.initials: J
authors.lastname: Qin
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
mesh_terms: D000042:Absorption; D005453:Fluorescence; D007834:Lasers; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010777:Photochemistry / Q000379:methods; D017785:Photons; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D011108:Polymers; D011758:Pyrroles