A simple urea-based multianalyte and multichannel chemosensor for the selective detection of F⁻, Hg²⁺ and Cu²⁺ in solution and cells and the extraction of Hg²⁺ and Cu²⁺ from real water sources: a logic gate mimic ensemble

Abstract

Herein, a hydrazine-based chromogenic, fluorogenic and electrochemical chemosensor BCC [1,5-bis(4-cyanophenyl) carbonohydrazide] was reported.

Advances in fluorescent and colorimetric sensors for anionic species

“…[134,135] In this context, Banarjee and co-workers have reported a combination of NAND, NOT and NOR logic function for the simple urea-based chemosensor 79 (Fig. 64a) [136]. As shown in the Fig.…”

“…a) Chemical structure of urea-based receptor 79; b) absorption spectra of 79 upon gradual addition of Fin a mixture of DMSO/acetonitrile (9:1 v/v); c) colorimetric responses of 79 with the alternative addition of Fand H + ; d) fabrication of the logic gate with outputs (Y1 and Y2) upon alternative inputs of NAND-NOT-NOR logic functions for 79 with Fand H + . Reproduced with permission from Ref [136]…”

Realization of multi-configurable logic gate behaviour on fluorescence switching signalling of naphthalene diimide congeners

“…29 Likewise, the molecular logic gates 30,31 also full Boolean algebra by acquiring chemical, optical or biological inputs and accordingly produce a single output. 32,33 This offers a new paradigm shi for future computing technology that facilitates with increasing functionality, reducing in size and cutting in cost. In recent decades, many biological and chemical systems have displayed the feasibility to effectuate various Boolean logic operations such as AND, YES, NOT, OR, NAND, IMPLICATION (IMPLY), INHIBIT (INHIB), XOR, XNOR, etc.…”

A Urea-Functionalized Chemoreceptor for Expeditious Chromogenic Recognition of Toxic Industrial Pollutants Cu2+ and CN– from Real Water Sources and Biofluids: Diagnosis of Wilson’s disease from Human Urine

“…Notably, urea-based chemoreceptors have attained wide acceptance for inducing intense and sharp colorimetric changes in the presence of anions like F – and CN – owing to hydrogen bonding followed by deprotonation of the N–H fragments . However, simultaneous and discriminative detection of the target specific cation and anion in unison by exploring urea-functionalized chemoreceptors with versatile applications has limited success and to the best of our knowledge hitherto is less explored in its congener. ,, In particular, chromogenic detection of analytes is advantageous owing to its convenience and practical applicability accompanied by rapid screening of guest analytes. , In accordance with these phenomena, colorimetric sensors have received enormous research interest due to their rapid “naked eye” detection and real-time monitoring of the targeted analytes without the aid of any sophisticated instrumentation. , …”