Synthesis of Bis-tetraphenylethene as a Novel Turn-On Selective Zinc Sensor

Abstract

The main purpose of this study is the synthesis of novel fluorescent Bis-TPE and the investigation of its wide range of photochemical behaviors. For this purpose, initially, Bis-TPE was synthesized. Following this, the interactions of Bis-TPE with a wide range of ions were studied in EtOH using ultraviolet–visible (UV–vis) and fluorescence spectroscopy. As a result of all UV–vis and fluorescence studies, it was determined that Bis-TPE showed turn-on sensor features against Zn2+ ions. Moreover, the limit of detection (LOD) and K a values of Bis-TPE/Zn2+ were calculated as 0.97 μM (970 nM) and 3.76 × 105 M–1, respectively. Moreover, all reversal studies resulted in switchable on/off variation of the alternative addition of ZnCl2 and [Bu4N]­OH to Bis-TPE. This result also implies that the probe Bis-TPE also exhibits specific OH– sensor properties in the presence of zinc.

Synthesis of Phenol-Hydrazide-Appended Tetraphenylethenes as Novel On–Off–On Cascade Sensors of Copper and Glutathione

“…This AIE behavior likely results from reduced photoinduced electron transfer as TPEs disaggregate in water due to their nucleophilic nitrogen (N) and oxygen (O) groups ( Figure 6 A). 56 Reversible binding was confirmed by alternating Cu 2+ and GSH additions, which respectively quenched and restored fluorescence ( Figure 6 B). TPEs samples, soft yellow and pale-orange solids, exhibit distinct emissions from TPEs–Cu 2+ complexes, likely as a result of copper interfering with the π–π* transitions of the TPE moiety ( Figure 6 C).…”

“…First, AIE studies demonstrated increased TPEs emissions with higher water content. This AIE behavior likely results from reduced photoinduced electron transfer as TPEs disaggregate in water due to their nucleophilic nitrogen (N) and oxygen (O) groups (Figure A) . Reversible binding was confirmed by alternating Cu 2+ and GSH additions, which respectively quenched and restored fluorescence (Figure B).…”

Tri-armed Schiff base fluorescent sensor for the rapid recognition of Zn(ii): application in live cell imaging, test strips and TLC

“…For instance, zinc is frequently found in red blood cells (RBCs) as an essential element of the enzyme carbonic anhydrase (hCAs), which plays a vital role in carbon dioxide metabolism processes. 3…”

“…10 Abnormal concentration of zinc can affect the growth and development of mammals (including humans) and plants, leading to several diseases such as Parkinson's disease, Alzheimer's disease (AD), arteriosclerosis, brain diseases, hair loss, stomach disorders, diarrhoea, epilepsy, cataract, ischemic stroke and night blindness. 3,11…”