An asymmetric Schiff base-functionalized gold nanoparticle-based colorimetric sensor for Hg<sup>2+</sup> ion determination: experimental and DFT studies

Amourizi, Fereshteh; Dashtian, Kheibar; Ghaedi, Mehrorang; Hosseinzadeh, Behzad

doi:10.1039/d1ay00408e

Cited by 24 publications

(6 citation statements)

References 38 publications

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“…Nanoparticles represent an excellent platform for a broad range of biological and biomedical applications. Schiff base-functionalized nanoparticles have often been used for the determination of heavy metal ions [ 44 ]. Recently, the synthesis of core–shell (Fe 3 O 4 @SiO 2 ) magnetic nanoparticles functionalized using an SB ligand for uranium extraction has also been reported [ 45 ].…”

Section: Introductionmentioning

confidence: 99%

A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

et al. 2022

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Schiff bases (SBs) have extensive applications in different fields such as analytical, inorganic and organic chemistry. They are used as dyes, catalysts, polymer stabilizers, luminescence chemosensors, catalyzers in the fixation of CO2 biolubricant additives and have been suggested for solar energy applications as well. Further, a wide range of pharmacological and biological applications, such as antimalarial, antiproliferative, analgesic, anti-inflammatory, antiviral, antipyretic, antibacterial and antifungal uses, emphasize the need for SB synthesis. Several SBs conjugated with chitosan have been studied in order to enhance the antibacterial activity of chitosan. Moreover, the use of the nanoparticles of SBs may improve their antimicrobial effects. Herein, we provide an analytical overview of the antibacterial and antifungal properties of SBs and chitosan-based SBs as well as SBs-functionalized nanoparticles. The most relevant and recent literature was reviewed for this purpose.

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Section: Introductionmentioning

confidence: 99%

A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

et al. 2022

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“…Schiff bases can be used to modify NPs by surface modification methods such as grafting and encapsulation, and a variety of ion sensors have been fabricated. ,− Actually, organic NPs of Schiff base complexes can also be directly prepared. − For instance, Singh et al synthesized a Schiff base based tripod receptor and obtained a zinc complex on this basis, which can be used for the detection of F – and HSO 4 – . The fluorescence peak at 422 nm was enhanced by the addition of F – because the cavity interaction of F – in the complex which resulted in the separation of two aromatic nitro rings and inhibited the photoinduced electron transfer (PET) effect.…”

Section: Chromogenic and Fluorogenic Chemosensorsmentioning

confidence: 99%

Schiff Base-Modified Nanomaterials for Ion Detection: A Review

Zhong

Shi

et al. 2022

ACS Appl. Nano Mater.

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Ion detection is crucial for environmental quality, human health, and industry development. Schiff bases and their complexes are widely applied as the probes for ion detection in chemistry, environment, and biology fields. There are many kinds of interesting Schiff bases and their coordination complexes that have been designed and synthesized based on the facile synthesis. Recently, Schiff base chemistry has intercrossed with nanomaterials toward wide applications. Nanomaterials are characterized by their sizes in the range of several nanometers to several hundreds of nanometers and then with large specific surface area. They have unusual properties such as mechanical property, optical property, and catalytic property, which are usually not active for their bulk materials. The development of new nanomaterials has dramatically increased in the past two decades, especially the hybridization of inorganic nanomaterials with organic functional species. Schiff base is a very famous class of organic molecules with diversity structures and properties. The remarkable point is that they are synthesized facilely. In this review, the principles and methods of Schiff base preparation have been scanned briefly. Then nanomaterials functionalized by Schiff base to achieve efficient, rapid, and sensitive recognition of ions were elaborated. The types of nanomaterials are included the metal–organic frameworks (MOFs) and covalent organic frameworks (COFs) constructed by Schiff base ligands with nanosized pores and surface modification of nanoparticles (NPs) with Schiff bases, which can not only retain the advantages of the original nanomaterials but also improve the ability of ion-specific recognition. The development of colorimetric, fluorescence, and electrochemical sensors based on Schiff base nanomaterials for ion detection in recent years was carefully summarized as well. It should be mentioned that the types of ions in this review are mainly metal ions. Finally, the challenges in the future in this field have been proposed.

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“…Tao et al applied the technical device of colorimetric sensor array to some therapeutic diagnosis [3]. Amourizi et al used gold nanoparticles as the object of the colorimetric sensor, and the color change during the reaction process was collected through the imaging function of the sensor [4]. Zhang et al carried out the detection of organic toxic substances with corresponding colorimetric sensors and tested the sensitivity of the substances according to the analysis results of the sensing device [5].…”

Section: Related Workmentioning

confidence: 99%

Image Semantic Recognition Algorithm of Colorimetric Sensor Array Based on Deep Convolutional Neural Network

Chen

Xing

2022

Advances in Multimedia

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The inspection of some substances usually includes two levels. One is the detection of the physical properties of the substance, which can be carried out through a series of physical detection methods and corresponding physical experiments. In the process of chemical detection, the color change after a chemical reaction is an extremely identifying optical property feature. In today’s increasingly mature Internet technology and related computer technology, the combination of this important identification chemical reaction and the former makes the chemical detection method visualized. The biggest difficulty in the application of this technology is to divide the color units produced by the chemical reaction in the contrast color sensor, which directly affects the identification process of the chemical reaction in the subsequent process. In order to better solve this problem, this paper will use a deep convolutional neural network to process the segmentation process of color units. And it is realized by image semantic processing of colorimetric sensor array and deep convolutional neural network processing of imaging. And through the experimental experiments based on convolutional neural network image segmentation processing, the results show that the efficiency of extracting features corresponding to different layers in the convolutional neural network is that the extraction efficiency of feature 1 and feature 2 is higher in the processing of 4 layers. They achieve 79.11%, 76.13%, 77.61%, 91.11% 92.31%, 91.05%, 91.03%, and 91.03%, respectively, and the extraction rate for feature 3 at layer 4 reaches 96.19%. It can be known from the above results that the segmented part of the image generated by the colorimetric sensor array processed by the deep convolutional neural network will be more conducive to the final color unit identification.

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An asymmetric Schiff base-functionalized gold nanoparticle-based colorimetric sensor for Hg²⁺ ion determination: experimental and DFT studies

Abstract: Polyvinyl alcohol-capped citrate-stabilized gold nanoparticles, functionalized with newly synthesized Schiff base derived from 3,4-diaminotoluene and benzaldehyde, to determine Hg2+ ions with HOMO–LUMO orbital study.

Cited by 24 publications

References 38 publications

A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

Schiff Base-Modified Nanomaterials for Ion Detection: A Review

Image Semantic Recognition Algorithm of Colorimetric Sensor Array Based on Deep Convolutional Neural Network

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An asymmetric Schiff base-functionalized gold nanoparticle-based colorimetric sensor for Hg2+ ion determination: experimental and DFT studies

Abstract: Polyvinyl alcohol-capped citrate-stabilized gold nanoparticles, functionalized with newly synthesized Schiff base derived from 3,4-diaminotoluene and benzaldehyde, to determine Hg2+ ions with HOMO–LUMO orbital study.

Cited by 24 publications

References 38 publications

A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

A Review on the Antimicrobial Activity of Schiff Bases: Data Collection and Recent Studies

Schiff Base-Modified Nanomaterials for Ion Detection: A Review

Image Semantic Recognition Algorithm of Colorimetric Sensor Array Based on Deep Convolutional Neural Network

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Product

Resources

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An asymmetric Schiff base-functionalized gold nanoparticle-based colorimetric sensor for Hg²⁺ ion determination: experimental and DFT studies