A triphenylamine-based aggregation-enhanced emission probe for viscosity and polarity analysis of lubricating oils. Issue 7 (19th January 2022)

• Record Type: Journal Article
• Authors: Jia, Pengxiao; Wang, Fu; Zeng, Wei; Wang, Zhaofeng
• Is Part Of: Analytical methods. Volume 14:Issue 7(2022)
• Page Start: 694
• Page End: 699
• Publication Date: 2022-01-19
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/d1ay01957k
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : This work provides an effective molecule-based method for the viscosity and polarity analysis of lubricating oils. Abstract : Lubricating oils offers abundant information about the operating state of machines. In this work, a donor–acceptor aggregation-enhanced emission fluorescent molecule, ( Z )-4-(1-cyano-2-(4-(diphenylamino)phenyl)vinyl)benzonitrile (CPA–TPA), was synthesized to investigate its function to sense the viscosity and polarity of lubricant base oils. The results indicated that the molecule showed steadily-increased fluorescence emission with the base oil viscosity. In a mixture of poly-α-olefin/ester base oils, its optimal emission gradually red-shifted with the ester oil fraction, i.e., the polarity of the lubricant. A good correlation could be established between the emission intensity of the probe and the oil viscosity or between the optimal emission wavelength and the oil polarity. This demonstrates a dual-response fluorescent probe used for lubricating oil analysis and opens a new opportunity to develop a molecule-based method for the evaluation of lubricating oil quality.