Highly Reversible “Off‐On‐Off” Dual‐channel Fluorescence Probe Based on Amino Pyrazole and Phenothiazine for Sensing Extremely Alkaline Solution

Li, Xiaohong; Zhao, Xiaoli; Wu, Lin-Li; Leng, Yanli; Cai, Xiaohua

doi:10.1002/slct.202104387

Cited by 2 publications

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, various methods have been developed to monitor pH, such as those utilizing microelectrodes, nuclear magnetic resonance (NMR), colorimetry, and fluorescence [ 2 , 3 , 4 , 5 , 6 ]. Compared to other pH measurement methods, fluorescence technology is beneficial because of its easy visualization and operation, nondestructive character, high sensitivity and selectivity, and the ease of availability of a wide range of dyes as pH indicators [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Turn-On Fluorescent pH Probes for Monitoring Alkaline pHs Using Bis[2-(2′-hydroxyphenyl)benzazole] Derivatives

Lee

Han

2023

Sensors

View full text Add to dashboard Cite

For surveilling human health, industries, and the environment, pH monitoring is important. Numerous studies on fluorescent probes have been conducted to monitor various pH ranges. However, fluorescent probes that are capable of sensing alkaline regions are rare. In this study, we propose turn-on-type fluorescent probes for detecting alkaline pHs using bis[2-(2′-hydroxyphenyl)benzazole] (bis(HBX)) derivatives. These probes have high pKa values (from 9.7 to 10.8) and exhibit strong fluorescence intensity and color changes at alkaline pHs. Probes derived from bis(HBX) exhibit good photostability, reversibility, and anti-interference toward pH variations, which can be identified as a certain fluorescence change toward a basic pH. Therefore, compounds would be advantageous to use fluorescent probes for monitoring alkaline pH changes.

show abstract

Section: Introductionmentioning

confidence: 99%

Turn-On Fluorescent pH Probes for Monitoring Alkaline pHs Using Bis[2-(2′-hydroxyphenyl)benzazole] Derivatives

Lee

Han

2023

Sensors

View full text Add to dashboard Cite

show abstract

Acylhydrazone Bond: A Pivotal Bridge for Modifying Julolidine Derivative with Pyrazole Group as MultiStimuli‐Responsive Fluorescent Materials

Jing,

Chen,

et al. 2024

ChemistrySelect

View full text Add to dashboard Cite

To screen julolidine derivatives containing a pyrazole group with excellent fluorescence properties and promising applications in multistimuli‐responsive fluorescent materials, three novel compounds were designed and synthesized by connecting pyrazoles through typical conjugated bonds: imine (T1), dihydrazone (T2), and acylhydrazone (T3). The molecular structure of the title compounds was characterized by 1H NMR, 13C NMR, and HR‐MS. The representative compound T3 was verified by single crystal X‐ray diffraction. Although the three compounds have roughly similar conjugated structures, dissimilarity in their fluorescence properties was apparent. The results of fluorescence studies showed that the compound T3, which was connected to julolidine and pyrazole by an acylhydrazone bond, exhibited excellent fluorescence performance compared to the other compounds T1 and T2. Compound T3 can also respond to external stimuli, such as solvent viscosity, organic acids/bases, and mechanical forces. In addition, T3 could also specifically detect Cu2+ ions, and the fluorescence titration data indicated that the low limit of detection (LOD) of compound T3 for Cu2+ is 0.26 µM within the range from 0 to 50 µM. Therefore, this work provides a preliminary basis for the development of multistimuli‐responsive fluorescent molecular materials containing acylhydrazone fragment.

show abstract

Highly Reversible “Off‐On‐Off” Dual‐channel Fluorescence Probe Based on Amino Pyrazole and Phenothiazine for Sensing Extremely Alkaline Solution

Cited by 2 publications

References 29 publications

Turn-On Fluorescent pH Probes for Monitoring Alkaline pHs Using Bis[2-(2′-hydroxyphenyl)benzazole] Derivatives

Turn-On Fluorescent pH Probes for Monitoring Alkaline pHs Using Bis[2-(2′-hydroxyphenyl)benzazole] Derivatives

Acylhydrazone Bond: A Pivotal Bridge for Modifying Julolidine Derivative with Pyrazole Group as MultiStimuli‐Responsive Fluorescent Materials

Contact Info

Product

Resources

About