Cascade recognition of Hg²⁺ and cysteine using a naphthalene based ESIPT sensor and its application in a set/reset memorized device

Abstract

An optical ESIPT sensor for Hg2+ and cysteine based on a naphthalene platform (1) was designed and synthesized by a one step reaction and characterized by using common spectroscopic techniques.

Optical Chemical Sensing of Iodide Ions: A Comprehensive Review for the Synthetic Strategies of Iodide Sensing Probes, Challenges, and Future Aspects

“…However, designing multi‐analyte chemosensors requires more than one chromophoric unit which can result in somewhat complicated exercise. Thus, building a cascade sensor could be considered one of the possible solutions where the sensor subsequently can detect more than one analyte [85–88] . In cascade sensing, the first sensor binds with an analyte and undergoes some physiochemical changes.…”

“…Thus, building a cascade sensor could be considered one of the possible solutions where the sensor subsequently can detect more than one analyte. [85][86][87][88] In cascade sensing, the first sensor binds with an analyte and undergoes some physiochemical changes. Then, this guest-bound sensor interacts with another analyte to give a second response.…”

“Turn-On” monopodal and dipodal nanoprobes for serum albumins – a case of shift in selectivity towards BSA and a Z- to U-like conformational change

“…The global analysis of fluorescence titration data through non-linear regression analysis 31 shows that both the probes form a 1 : 1 stoichiometric complex with HSA and BSA. The binding constants (Fig.…”

Colorimetric and fluorometric probes for the optical detection of environmental Hg(ii) and As(iii) ions

“…The sensor 19 [70] is a fluorescein hydrazide coupled 2-(pyridine-2-ylmethoxy)-naphthalene-1-carbaldehyde moiety which exhibited excellent selectivity and sensitivity towards Hg Excited-state intramolecular proton transfer (ESIPT) active molecules are advantageous due to their excellent photostability, large stokes shift, and unique emission properties. Naphthalene derives sensor 20 [71] is an ESIPT active probe that has been able to detect Hg 2+ in CH 3 CNwater (9:1, v/v, pH=7.0, HEPES buffer) medium in a fluorescence ON to OFF fashion accompanied by a drastic change of color from colorless to yellow. Due to the interaction between N and -OH groups of 20 and Hg 2+ stopped the ESIPT process which resulted in a fluorescence quenching ( Figure 10).…”