Tailor-made dicationic ionic liquid as a fluorescent sensor for detection of hydroquinone and catechol

Bao

ACS Appl. Polym. Mater.

et al. 2019

β-Glucosidase is associated with many diseases, so it is important to be able to accurately determine β-glucosidase activity. Here, we describe a turn-on fluorescence method for sensitively determining β-glucosidase activity. The method involves the formation of water-soluble fluorescent polymer nanoparticles. β-Glucosidase initially hydrolyzes the β-arbutin substrate to release hydroquinone (1,4-dihydroxybenzene). The hydroquinone then forms cross-links between branched polyethylenimine molecules to give fluorescent water-soluble polymer nanoparticles. The polymer nanoparticles were found to fluoresce with excitation and emission peaks at 373 and 510 nm, respectively, and the fluorescence intensity was related to the β-glucosidase activity. The fluorescence intensity could therefore be used to determine the β-glucosidase activity. The lowest β-glucosidase activity that could be determined was 0.4 U L–1, and the dynamic linear range was 1.0–36.0 U L–1. The method was very selective for β-glucosidase activity and was not sensitive to other proteins. The method was successfully used to determine β-glucosidase in spiked samples containing human serum albumin at a concentration of 0.5%, and the recoveries were 95.2%–104.5%.

Section: ■ Results and Discussionmentioning

confidence: 99%

“Turn-On” Fluorescence Determination of β-Glucosidase Activity Using Fluorescent Polymer Nanoparticles Formed from Polyethylenimine Cross-Linked with Hydroquinone

Bao

ACS Appl. Polym. Mater.

et al. 2019

Separation and Purification Technology

“…In addition, they have been successfully applied to several separation processes, such as removing heavy metal ions [120,121], greenhouse gases treatment [122 -125], and VOCs removal [1, 126 -128]. Besides, the most attractive property of ILs is tailor-made, which means IL's properties can be modified via alteration of cations and anions to produce specific compounds for given applications [129,130]. Therefore, ILs are regarded as effective green solvents alternative to traditional organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Ionic liquids combined with membrane separation processes: A review

Yan

Anguille

Bendahan

et al. 2019

215

101

Combination of membrane processes and ionic liquids have received more and more attention in pollutants removal because it enhances separation efficiency but also broaden their research and application areas. This review provides a first and systematical summary on ionic liquids incorporate in membrane processes for VOCs or CO2 separation, including supported ionic liquid membranes (SILMs), ILs composite polymer membranes (ILPMs), ionic liquids composite mixed matrix membranes (ILMMMs), poly(ionic liquid)s membranes (PILMs), ionic liquid gel membranes (ILGMs), and ionic liquid membrane contactors (ILMCs).Moreover, a new concept, combination of the membrane separation processes and absorption processes of ionic liquids, is introduced. Those separation processes are described detailly and compared with other conventional processes. With their separation performances and the processes of regeneration, membrane contactor shows stronger competitive advantages and it has the potential to be a major process in VOCs and CO2 separation. The advantages and disadvantages posed by all present ionic liquid membrane processes are summarized. Finally, challenges and opportunities in ionic liquid membrane separation processes are identified and discussed.

“…Fluorescence sensing has gained attention as an alternative method due to its high sensitivity, fast response time, and simplicity of operation. [9][10][11][12] There is no doubt that sensing arrays offer many advantages over individual sensor elements, including accuracy, versatility, and the ability to simultaneously discriminate between analytes with similar structures and properties. In comparison to conventional organic dyes and semiconductor quantum dots, fluorescent CDs have good biocompatibility, tunable photoluminescence property, and low toxicity.…”

Section: Introductionmentioning

confidence: 99%

A fluorescent sensor array based on three kinds of carbon dots for identification of hydroxybenzaldehyde and nitrobenzaldehyde isomers

Sun

Chen

2022

New J. Chem.