A visible-light-responsive molecularly imprinted polyurethane for specific detection of dibenzothiophene in gasoline. Issue 12 (10th March 2022)

• Record Type: Journal Article
• Authors: Si, Yamin; Jiang, Feng; Qiang, Liang; Teng, Xiaotong; Gong, Chengbin; Tang, Qian
• Is Part Of: Analytical methods. Volume 14:Issue 12(2022)
• Page Start: 1254
• Page End: 1260
• Publication Date: 2022-03-10
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/d1ay02128a
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : A visible-light-responsive molecularly imprinted polyurethane was prepared and used for the detection of dibenzothiophene in gasoline. Abstract : Dibenzothiophene and its derivatives in gasoline and diesel would release sulfur oxides during combustion, and this is harmful to human health and the environment. This paper reports a method based on a visible-light-responsive molecularly imprinted polyurethane (VMIPU) to monitor trace dibenzothiophene in gasoline. The VMIPU was prepared by a polyaddition reaction using N, N -bis-(2-hydroxyethyl)-4-phenylazoaniline as the functional monomer, dibenzothiophene as the template molecule, diphenylmethane diisocyanate as the crosslinker and castor oil as the chain extender. The VMIPU showed good visible-light-response and specific adsorption for dibenzothiophene. The trans → cis photoisomerization rate constant of azobenzene chromophores in the VMIPU shows a linear relationship with the dibenzothiophene concentration in the range of 0–20 μmol L −1 . This was used to estimate trace dibenzothiophene in spiked gasoline with recoveries of 95.7–101.0% and relative standard deviations of 7.0–12.7%.