An efficient ICT-based ratio/colorimetric tripodal azobenzene probe for the recognition/discrimination of F−, AcO− and H2PO4− anions

Liao, Xian; Fang, Jun An; Zhao, Jiang Lin; Ruan, Qin; Zeng, Xi; Luo, Qing Ying; Redshaw, Carl

Abstract

The tripodal probe L was readily prepared via introducing rhodamine and azobenzene groups in a two-step procedure. Studies of the recognition properties indicated that probe L exhibited high sensitivity and selectivity towards F−, AcO− and H2PO4− through a ratiometric colorimetric response with low detection limits of the order of 10−7 M. The complexation behaviour was fully investigated by spectral titration, 1H NMR spectroscopic titration and mass spectrometry. Probe L not only recognizes F−, AcO− and H2PO4−, but can also distinguish between these three anions via the different ratiometric behaviour in their UV–vis spectra (387/505 nm for L-H2PO4−, 387/530 nm for L-AcO− and 387/575 nm for L-F− complex) or via different colour changes (light coral for L-H2PO4−, light pink for L-AcO− and violet for the L-F− complex). Additionally, given the presence of NH and OH groups in probe L, which can be protonated and deprotonated, probe L further exhibited an excellent pH response over a wide pH range (pH 3 to pH 12).

Citation

Liao, X., Fang, J. A., Zhao, J. L., Ruan, Q., Zeng, X., Luo, Q. Y., & Redshaw, C. (2019). An efficient ICT-based ratio/colorimetric tripodal azobenzene probe for the recognition/discrimination of F−, AcO− and H2PO4− anions. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 221, Article 117174. https://doi.org/10.1016/j.saa.2019.117174

• Journal Article Type: Article
• Acceptance Date: May 26, 2019
• Online Publication Date: May 28, 2019
• Publication Date: Oct 5, 2019
• Deposit Date: Aug 6, 2019
• Publicly Available Date: May 29, 2020
• Journal: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
• Print ISSN: 1386-1425
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 221
• Article Number: 117174
• DOI: https://doi.org/10.1016/j.saa.2019.117174
• Keywords: Tripodal azobenzene probe; Ratio/colorimetric; Recognition/discrimination; Anion; Instrumentation; Analytical Chemistry; Spectroscopy; Atomic and Molecular Physics, and Optics
• Public URL: https://hull-repository.worktribe.com/output/2313968
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1386142519305645?via%3Dihub
• Additional Information: ©2019, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
• Contract Date: Aug 7, 2019