A turn-on fluorescence sensor for the highly selective detection of Al³⁺ based on diarylethene and its application on test strips

Abstract

A novel turn-on fluorescent sensor for Al 3+ based on photochromic diarylethene with a 2hydroxybenzhydrazide unit has been successfully designed and synthesized. The photochromic and fluorescent characteristics were studied methodically in methanol under irradiation using UV/vis light and induced by Al 3+ /EDTA. This fluorescent sensor was highly selective toward Al 3+ with an obvious fluorescent color change from dark blue to blue. The Job's plot and mass spectrometry (MS) analysis indicate a binding stoichiometry of 1 : 1 between the fluorescent sensor and Al 3+ . Moreover, a test strip containing this fluorescent sensor was prepared to allow for the easy detection of Al 3+ in water. Finally, a logic circuit was designed using four input signals (In1: UV; In2: vis; In3: Al 3+ ; In4: EDTA) and one output signal.

Development of Colorimetric and Turn‐On Fluorescence Sensor for the Detection of Al3+ and F− Ions: DNA Tracking and Practical Performance as Applications

“…In order to substantiate the observed absorbance results of NAATD towards F − ions, the fluorescence spectra were also analyzed. There was no such considerable changes observed in the presence of various anions except fluoride ions showed an impressive enhancement in the fluorescence intensity at 530 nm. These results exhibit clearly that NAATD also has the selectivity towards F − ions in DMSO over the other anions such as CO 3 2− , SO 4 2− , NO 2 − , CH 3 COO − ,Cl − , Br − , I − , F − and CN − (Figures7.…”

A monomolecular platform with varying gated photochromism

“…As one type of logic devices, logic circuit with multiple input and output signals has been designed delicately and shows great potential in logic operations. [35][36][37][38][39] As mentioned above, varying degrees of gating photochromic properties were realized by the introduction of Cu 2+ and Ni 2+ to the methanol solution of compound DTEP. On this basis, a smart logic circuit (Fig.…”

Ratiometric Fluorescent Sensor for Al3+ Based on the Inner Filter and Static Quenching Effects of Carbon Dots Obtained from Neem Leaves

“…For example, Pu et al synthesized a series of diarylethene derivatives for selective detection of Al 3 + . [12,13] Liu et al reported a 4-(diethylamino)-2hydroxybenzaldehyde fluorescent sensor for detecting Al 3 + . [14] Kang et al constructed a highly selective colorimetric and fluorescent turn-on chemosensor for Al 3 + based on naphthalimide derivative.…”