Related Experiment Video
Updated: Feb 11, 2026

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
Published on: July 19, 2019
Benzothiazole-Based AIEgen with Tunable Excited-State Intramolecular Proton Transfer and Restricted Intramolecular
Kai Li1,2, Qi Feng1, Guangle Niu2
1College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou 450001 , P. R. China.
Abstract:
In this work, a benzothiazole-based aggregation-induced emission luminogen (AIEgen) of 2-(5-(4-carboxyphenyl)-2-hydroxyphenyl)benzothiazole (3) was designed and synthesized, which exhibited multifluorescence emissions in different dispersed or aggregated states based on tunable excited-state intramolecular proton transfer (ESIPT) and restricted intramolecular rotation (RIR) processes. 3 was successfully used as a ratiometric fluorescent chemosensor for the detection of pH, which exhibited reversible acid/base-switched yellow/cyan emission transition. More importantly, the pH jump of 3 was very precipitous from 7.0 to 8.0 with a midpoint of 7.5, which was well matched with the physiological pH. This feature makes 3 very suitable for the highly sensitive detection of pH fluctuation in biosamples and neutral water samples. 3 was also successfully used as a ratiometric fluorescence chemosensor for the detection of acidic and basic organic vapors in test papers.
More Related Videos
12:07Microwave-assisted Intramolecular Dehydrogenative Diels-Alder Reactions for the Synthesis of Functionalized Naphthalenes/Solvatochromic Dyes
Published on: April 1, 2013
12:01Quantification and Size-profiling of Extracellular Vesicles Using Tunable Resistive Pulse Sensing
Published on: October 19, 2014
Related Concept Videos
Intermolecular vs Intramolecular Forces
Intramolecular Aldol Reaction
Radical Reactivity: Intramolecular vs Intermolecular
Intramolecular Claisen Condensation of Dicarboxylic Esters: Dieckmann Cyclization
The Sense of Self: Reflected Self-Appraisal and Social Comparison
Restriction Enzymes
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...