Photochemical Formation of Tunable Gold Nanostructures Using Versatile Water‐Soluble Thiolate Au(I) Precursor

Murshid, Nimer; Smith, D. Scott; Kitaev, Vladimir

doi:10.1002/ppsc.201800285

Cited by 5 publications

(2 citation statements)

References 81 publications

(109 reference statements)

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“…19 Glutathione (GSH) is the most common candidate as a reducing and capping ligand to obtain AuNCs. 20 Aggregation-induced emission (AIE), which was discovered by Tang et al, was first reported in organic molecules regime. 21 Fluorophores generally show bright fluorescence in dilute solutions but weak fluorescence in concentrated solutions or agglomerations with aggregation-caused quenching (ACQ) effect.…”

Section: Introductionmentioning

confidence: 99%

Rapid determination of cysteine and chiral discrimination of D-/L-cysteine via the aggregation-induced emission enhancement of gold nanoclusters by Ag+

Ruan

Zhang

et al. 2022

ANAL. SCI.

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Cysteine (Cys) plays vital roles in various physiological and pathological functions.Either deficiency or excess of Cys could lead to severe ailments in human. Identification and determination of Cys are the key issues for the early diagnosis of relevant diseases.This contribution presented a promising potential of fluorescent gold nanoclusters (AuNCs) for Cys determination and D-/L-Cys enantiomer discrimination. Cys determination and discrimination involved three steps. First, as a reducing and capping ligand, glutathione was applied to fabricate weak fluorescent AuNCs. Second, Ag + was introduced to lead the aggregation-induced emission (AIE) to form well-dispersed aggregates. The fluorescence intensity of AuNCs was monitored at excitation/ emission wavelengths of 396/620 nm. Third, Cys was found to quickly bind with Ag + to form a grid network to light up the system via aggregation-induced emission enhancement (AIEE). A novel sensor for sensitive and visually selective detection of Cys was established on the basis of AIEE mechanism. Rapid quantitative determination of Cys was achieved in two minutes via AIEE within the range of 0.5-100 μmol L −1 and a detection limit of 0.365 μmol L −1 . Moreover, due to the specific interactions of D-/L-Cys with mandelic acid and tartaric acid, visual discrimination of D-/L-Cys enantiomers with naked eyes was realized by replacing the organic acid buffer.

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Section: Introductionmentioning

confidence: 99%

Rapid determination of cysteine and chiral discrimination of D-/L-cysteine via the aggregation-induced emission enhancement of gold nanoclusters by Ag+

Ruan

Zhang

et al. 2022

ANAL. SCI.

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“…Aside from suitable reducing agents, the reduction can be also done using photochemical, radiochemical, or electrochemical approaches. Photochemical approach is usually based on the application of UV or vis irradiation, which generates in the solution, at the presence of suitable organic sensibilizers, radicals that fulfill the role of a reducing agent and reduce the metal ions to neutral metal atoms in the solution [110,111]. Direct photochemical reduction is possible for some photosensitive materials (e.g., silver halogenides).…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Aspects of Metal Nanoparticle Preparation

Kvı́tek¹,

Prucek²,

Panáček³

et al. 2020

Engineered Nanomaterials - Health and Safety

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Physicochemical properties, including optical properties or catalytic activity, and biological properties of metal nanoparticles are considerably influenced by their diameter. Therefore, a tailored synthesis of metal nanoparticles represents a key topic in the field of nanotechnology, and the number of research papers, concerning this topic, has been annually growing with an arithmetic progression. Metal nanoparticles are most frequently prepared via chemical reduction of metals in ionic form from their solutions. Using this synthetic approach, tailored parameters of the particles can be achieved via the adjustment of numerous factors: difference of potentials of the metal redox system and the reducing agent redox system, pH of the reaction mixture, and its temperature. The influence of these three factors on the diameter of the prepared metal nanoparticles will be discussed in the following chapter with respect to general laws and based on numerous examples from research practice.

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Green chemistry inspired formation of bioactive stable colloidal nanosilver and its wide-spectrum functionalised properties for sustainable industrial escalation

Das

Bhattacharyya

et al. 2022

Results in Chemistry

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Photochemical Formation of Tunable Gold Nanostructures Using Versatile Water‐Soluble Thiolate Au(I) Precursor

Cited by 5 publications

References 81 publications

Rapid determination of cysteine and chiral discrimination of D-/L-cysteine via the aggregation-induced emission enhancement of gold nanoclusters by Ag+

Rapid determination of cysteine and chiral discrimination of D-/L-cysteine via the aggregation-induced emission enhancement of gold nanoclusters by Ag+

Physicochemical Aspects of Metal Nanoparticle Preparation

Green chemistry inspired formation of bioactive stable colloidal nanosilver and its wide-spectrum functionalised properties for sustainable industrial escalation

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