A highly selective “turn-on” water-soluble fluorescent sensor for gallium ion detection

Abstract

In this work, a highly selective water-soluble “turn-on” fluorescent sensor for gallium ion recognition was reported.

A new sensitive and selective detection of Ga3+ by thiophene‐based ‘turn‐on’ fluorescent chemosensor

“…This limit is the third lowest among the thiophene-based fluorescent Ga 3+ chemosensors (Table S1). [27,29,30,33] For studying binding properties, we produced a Job's plot experiment (Figure S4). The result demonstrated that DHTC and Ga 3+ created 1:1 stoichiometry, which was confirmed using ESI-MS (Figure S5).…”

“…They adopt several moieties for instance, rhodamine, sulfonamide, quinolone, benzothiazole, and a naphthyl group. [5,6,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] However, some of them are restricted by the use of complex synthetic methods of preparation. Thiophene derivatives with good optical properties could be used as a functional group for chemosensors.…”

Catalyst‐ and Solvent‐Free Synthesis of N‐Acylhydrazones via Solid‐State Melt Reaction

“…Among N-acylhydrazones, 2-furoic and 2-thiophenecarboxylic acid-based N-acylhydrazones have gained considerable interest as colorimetric and fluorescence sensors owing to their impressive spectroscopic features and the added advantage of furan and thiophene as πlinkers. [15,19,21,22,[50][51][52][53][54][55][56][57][58] Their synthetic methods include reacting aromatic aldehydes with 2-furoic hydrazide or 2-thiophenecarboxylic acid hydrazide in solvents that need extended reaction durations (3-48 hours). Therefore, we present herein a fast and efficient method for the synthesis of N-acylhydrazones via a solid-state melt reaction of aromatic aldehydes with 2-furoic hydrazide or 2-thiophenecarboxylic acid hydrazide under catalyst-and solvent-free conditions that, to the best of our knowledge, has never been discovered (Scheme 1d).…”

“…Indeed, the scope of substrates for this method has not been thoroughly examined. Among N ‐acylhydrazones, 2‐furoic and 2‐thiophenecarboxylic acid‐based N ‐acylhydrazones have gained considerable interest as colorimetric and fluorescence sensors owing to their impressive spectroscopic features and the added advantage of furan and thiophene as π‐linkers [15,19,21,22,50–58] . Their synthetic methods include reacting aromatic aldehydes with 2‐furoic hydrazide or 2‐thiophenecarboxylic acid hydrazide in solvents that need extended reaction durations (3–48 hours).…”

Zinc(ii) Schiff base complexes as dual probes for the detection of NH4+ and HPO42− ions

“…To the best of our knowledge the detection of NH 4 + and HPO 4 2À ions using a Schiff base fluorescence sensor is rarely reported. Based on our previous work,[40][41][42][43] in this paper, three novel Zn(II) Schiff base complexes were synthesized by solvent evaporation at room temperature using 4-substituted salicylic aldehyde derivatives NaHL (NaHL = sodium (S,E)-2-((4-chloro-2-hydroxybenzylidene) amino) propanoate) and zinc acetate. The coordination mode of [Zn(L) (H 2 O)] n (1) and [Zn(L) (H 2 O)] n (2) was basically the same, and [Zn 2 (L) 2 (bipy)] (3) was constructed as a quad-nuclear structural unit due to the introduction of the second ligand 4,4 0 -dipyridine connection.…”