Fluorescent chemosensor based on Schiff base for selective detection of zinc(II) in aqueous solution

Li, Lei; Dang, Yongqiang; Li, Hongwei; Wang, Bin; Wu, Yuqing

doi:10.1016/j.tetlet.2009.11.070

Cited by 102 publications

(38 citation statements)

References 41 publications

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“…4). The association constant, K a , for the SAL/Zn 2+ complex is calculated to be 3.64×10 4 M −1 at 298 K. The K a value is similar to those reported for other salicylaldimines [13]. Plots constructed using Eqs.…”

Section: Binding Of Sal With Zn 2+supporting

confidence: 71%

“…A much milder electronwithdrawing group in II, 2-hydroxynaphtahldehyde, was also examined. This particular compound, which has a pK a of 7.38 [13] (λ max 250, 308, 398 nm), is expected to be a better binder to Zn 2+ . However II/Zn 2+ mixtures did not show any fluorescence.…”

Section: Other Related Carbonyl Ligandsmentioning

confidence: 99%

“…These include photo-induced electron transfer (PET) [9], photo-induced charge transfer (PCT), intramolecular charge transfer (ICT) [10], excimerexciplex formation and extinction and fluorescence resonance energy transfer (FRET) [11]. Imines and hydrazones of salicylaldehyde occupy a prominent place among the various ligands that have been employed for the determination of zinc [12,13]. These ligands have high binding affinity to zinc and their complexes show strong fluorescence.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover many of these zinc complexes exhibit a shift in either their excitation or emission energies which makes the ligands suitable for accurate and quantitative determination of zinc ion concentration [11]. Fluorescence in these complexes has been explained by the prevention of isomerization across the C= N bond when complexed to zinc, decreasing the probability of non-radiative decay [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Fluorescent Studies of Salicylaldehyde and Other Related Carbonyl Compounds for the Selective and Sensitive Detection of Zinc(II) Ions in Aqueous Solution

et al. 2011

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Salicylaldehyde was found to have a high selectivity for zinc ions with simultaneous enhancement of fluorescence in aqueous buffer solution at optimum pH 8.5. The stoichiometry of the complex was determined to be 1:1 with a K(a) value of 3.4 × 10(4) M(-1) at 298 K. The fluorescence of the complex is not affected by common anions and Zn(2+) binds preferentially to salicylaldehyde in the presence of alkali, alkaline earth and heavy metal cations (Hg(2+), Cd(2+), Cr(3+) and Ni(2+)). This property is not observed with related phenolic compounds bearing a carbonyl group such as esters, amides, carboxylic acids and ketones.

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Section: Binding Of Sal With Zn 2+supporting

confidence: 71%

Section: Other Related Carbonyl Ligandsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fluorescent Studies of Salicylaldehyde and Other Related Carbonyl Compounds for the Selective and Sensitive Detection of Zinc(II) Ions in Aqueous Solution

et al. 2011

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“…1,2 In addition, many 2H-chromenes have utility as photochromic materials [3][4][5][6] and as intermediates in the synthesis of more complex polycyclic heterocycles. [7][8][9][10][11] These important applications have stimulated the development of diverse synthetic approaches to 2H-chromenes; however, new efficient strategies leading to novel substitution patterns are still required.…”

Section: Introductionmentioning

confidence: 99%

An easy synthesis of diversely functionalized 2H-chromenes and amido amines by an enol-Ugi reaction

Neo¹,

Castellano²,

Marcos³

2016

Arkivoc

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The first synthesis of methyl 2-(4-hydroxy-2-oxo-2H-chromen-3-yl)-2-oxoacetate is described. This compound has been successfully used in a multicomponent enol-Ugi condensation with imines and isocyanides affording 4-aminoacyl-coumarin enamines in a highly atom-economic and convergent process. Furthermore, the postcondensation transformation of these adducts allows the straightforward synthesis of both unprotected amino amides and as yet unknown 2-hydroxychromenyl enamines.

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A turn‐on indole‐based sensor for hydrogen sulfate ion

et al. 2013

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A simple indole-based receptor 1 was prepared by a simple Schiff-base reaction of 1H-indole-3-carbaldehyde with ethane 1,2-diamine and its fluoroionophoric properties toward anions were investigated. Indole-based receptor 1 acts as a selective turn-on fluorescent sensor for HSO4(-) in methanol among a series of tested anions. Fluorescence spectroscopy, ultraviolet and nuclear magnetic resonance imaging support that the HSO4(-) indeed interacted with imine nitrogen and the proton of nitrogen in indole ring.

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Fluorescent chemosensor based on Schiff base for selective detection of zinc(II) in aqueous solution

Cited by 102 publications

References 41 publications

Fluorescent Studies of Salicylaldehyde and Other Related Carbonyl Compounds for the Selective and Sensitive Detection of Zinc(II) Ions in Aqueous Solution

Fluorescent Studies of Salicylaldehyde and Other Related Carbonyl Compounds for the Selective and Sensitive Detection of Zinc(II) Ions in Aqueous Solution

An easy synthesis of diversely functionalized 2H-chromenes and amido amines by an enol-Ugi reaction

A turn‐on indole‐based sensor for hydrogen sulfate ion

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