A New Rhodamine B Hydrazide Hydrazone Derivative for Colorimetric and Fluorescent "Off-On" Recognition of Copper(II) in Aqueous Media

Recent developments in rhodamine salicylidene hydrazone chemosensors

“…Tang's group designed a rhodamine B based derivative 3 as a colorimetric and uorescent dual mode sensor for recognition of Cu 2+ in CH 3 CN/H 2 O (1 : 1, v/v, HEPES 10 mM, pH ¼ 7.0) solution. 24 Sensor 3 displayed highly selective, sensitive and rapid recognition behavior toward Cu 2+ among a range of biologically and environmentally important metal ions. The 1 : 1 binding stoichiometry of 3 and Cu 2+ was proved by nonlinear least-squares tting of titration proles and Job's plot; the association constant and uorescence detection limit were calculated to be 1.92 Â 10 6 M À1 and 7.96 Â 10 À8 M, respectively.…”

Thiophene aldehyde-diamino uracil Schiff base: A novel fluorescent probe for detection and quantification of cupric, silver and ferric ions

“…Copper ion fluorescent sensors include heptamethine cyanine-based near-infrared fluorescent probe [17], dansyl-based probe [18], 6-(N,N-dimethylamino)-2-naphthoylacryl acid [19], triarylpyrazoline-based Cu(I) sensor [20], coumarin Schiff base [21], near-infrared fluorescent probe based on photo-induced electron transfer mechanism [22], bis-benzimidazolyldiamide-based probe [23], riboflavin-stabilized gold nanoclusters [24], [3-diam inophenazine, 1,2-diamino-anthraquinone and 2,4-dinitrophen ylhydrazine] [25], coumarin-based sensor [26,27], dehydroabietyl derivative bearing a 2-(2 0 -hydroxyphenyl) benzimidazole unit [28], rhodamine B hydrazide hydrazone derivative [29], carboxylic acid-functionalized tris(2,2 0 -bipyridine)-ruthenium(II) complex [30], thiourea-based probe [31], carbazole-based Schiff base [32], rhodamine-based probe [33], silver nanoclusters (Ag NCs) [34], 1,8-diaminonaphthalene-based sensor [35] and malonamide fluoroionophore [36].…”

An Effective ‘Off-On’ Artificial Probe Based on Rhodamine B Derivative for Sensitive and Selective Recognition of Cu2+ Ions

“…However, when different metal ions are added to a sensor solution, the spirolactamopen forms of the molecular structures generated by miscellaneous cations not only show the strong absorption bands and/or fluorescence emissions. There exists also a drastic change in color from colorless to a colour -such as pink or purple -allowing the naked-eye detection of target metal ions Sun et al, 2015;Tang et al, 2013;Sahana et al, 2017;Wang et al, 2014;Li et al, 2015;Chatterjee et al, 2016;Ozdemir, 2016;.…”