Enhanced three-photon activity triggered by the AIE behaviour of a novel terpyridine-based Zn(ii) complex bearing a thiophene bridge. Issue 30 (20th June 2019)

• Record Type: Journal Article
• Authors: Feng, Zhihui; Li, Dandan; Zhang, Mingzhu; Shao, Tao; Shen, Yu; Tian, Xiaohe; Zhang, Qiong; Li, Shengli; Wu, Jieying; Tian, Yupeng
• Is Part Of: Chemical science. Volume 10:Issue 30(2019)
• Page Start: 7228
• Page End: 7232
• Publication Date: 2019-06-20
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9sc01705d
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : The complexDZ1 displayed enhanced three-photon absorption activity and could avoid light-quenching and light-bleaching effectively due to its aggregation-induced emission feature. Abstract : Multiphoton bioimaging benefits from good penetration of tissue, low phototoxicity and high resolution. Hence, development of efficient multiphoton imaging agents is highly desirable but remains challenging. Herein, a novel terpyridine-based Zn(ii ) complex bearing a thiophene bridge was designed rationally and fabricated. Thanks to its aggregation-induced emission (AIE), DZ1 emitted bright yellow-green fluorescence ( λ em = 575 nm) under physiological conditions. The three-photon spectral changes ofDZ1 when binding with RNA unambiguously reflected its RNA-specific targeting behaviour, resulting in twofold enhancement in three-photon action cross-sections located at the second near-infrared window (1700 nm).