Tailoring the luminescence of atomic clusters <i>via</i> ligand exchange reaction mediated post synthetic modification

Basu, Srestha; Gayen, Chirantan; Dolai, Santanu

doi:10.1039/c9cp06063d

Cited by 5 publications

(3 citation statements)

References 29 publications

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“…The XPS spectra of N 1s and S 2s can embody the successful attachment of Cys to [Ru(H 2 dcbpy) 3 ]·Cl 2 . In Figure C, the peaks at 398.9, 399.5, and 401.3 eV corresponded to −NH 2 of Cys, OC–N from NH 2 –COOH bonding, and CN–C of the dipyridyl group, respectively. − And the binding energies of S 2s at 160.5, 163.1, and 164.9 eV were ascribed to the −SH group of Cys (Figure D) . Subsequently, the successful connection between [Ru(H 2 dcbpy) 3 ]·Cl 2 and Cys was further analyzed from the FT-IR results (Figure E).…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Signal On/Off Electrochemiluminescence Gel Aptasensor Based on a Controlled Release Strategy for the Sensitive Detection of Prostate Specific Antigen

et al. 2023

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The controlled release strategy can make the constructed sensor have the function of self-on/off, which has an obvious effect on improving the sensitivity in immunoassays. Metal organic gels (MOGs) are the most noteworthy. They are materials with ultrahigh surface area, highly dispersed atomical metal sites, and well-defined porosity and can be used as an efficient luminophore to cause the developed sensor to have good hydrophilicity and adjustability, thus further improving the detection sensitivity. In this work, a novel on/off electrochemiluminescence (ECL) gel aptasensor was constructed using the Cys-[Ru(dcbpy)3]2+ gel as a luminophore, ZnS quantum dots (QDs) as quenchers, and aminated mesoporous silica nanocontainers (SiO2–NH2) as carriers of controlled release for prostate specific antigen (PSA) detection. Specifically, the ssDNA and PSA aptamer made up clamp-like molecules to block holes of the SiO2–NH2 after encapsulating the quencher ZnS QDs. Because of the specific binding between the PSA antigen and aptamer, the clamp-like molecules of ssDNA and the PSA aptamer were disassembled. Finally, the release of ZnS QDs was triggered, thereby realizing a self-off mode of the ECL signals under a co-reactant-free environment by ECL resonance energy transfer (ECL-RET) between the Cys-[Ru(dcbpy)3]2+ and ZnS QDs. In addition, the quenching mechanism was confirmed by molecular orbitals from the theoretical calculation level. The detection limit of the gel aptasensor for PSA was as low as 1.01 fg/mL, showing excellent sensitivity and accuracy. These strategies provided a feasible idea for PSA and even other tumor marker immunoassays.

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Section: Resultsmentioning

confidence: 99%

Highly Efficient Signal On/Off Electrochemiluminescence Gel Aptasensor Based on a Controlled Release Strategy for the Sensitive Detection of Prostate Specific Antigen

et al. 2023

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“…This eventually led to alteration in luminescence of the clusters, as ligands stabilizing the clusters are well known for playing key role in the luminescence properties of the clusters. The ligand exchange reaction, involving Au NCs was well validated using X-ray photoelectron spectroscopy (XPS) ( Figure 5 a) [ 84 ].…”

Section: Chemical Reactions Of Nanoclustersmentioning

confidence: 99%

“… ( a ) Schematic illustration depicting ligand exchange reaction between histidine stabilized Au NCs and cysteine. Reprinted with permission from [ 84 ]. Copyright Royal Society of Chemistry 2020 ( b ) Experimental results showing quenching in luminescence of cystine stabilized Cu NCs upon reaction with oxygen in presence of light.…”

Section: Figurementioning

confidence: 99%

Controlling the Chemistry of Nanoclusters: From Atomic Precision to Controlled Assembly

Basu

Antoine

2021

Nanomaterials

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Metal nanoclusters have gained prominence in nanomaterials sciences, owing to their atomic precision, structural regularity, and unique chemical composition. Additionally, the ligands stabilizing the clusters provide great opportunities for linking the clusters in higher order dimensions, eventually leading to the formation of a repertoire of nanoarchitectures. This makes the chemistry of atomic clusters worth exploring. In this mini review, we aim to focus on the chemistry of nanoclusters. Firstly, we summarize the important strategies developed so far for the synthesis of atomic clusters. For each synthetic strategy, we highlight the chemistry governing the formation of nanoclusters. Next, we discuss the key techniques in the purification and separation of nanoclusters, as the chemical purity of clusters is deemed important for their further chemical processing. Thereafter which we provide an account of the chemical reactions of nanoclusters. Then, we summarize the chemical routes to the spatial organization of atomic clusters, highlighting the importance of assembly formation from an application point of view. Finally, we raise some fundamentally important questions with regard to the chemistry of atomic clusters, which, if addressed, may broaden the scope of research pertaining to atomic clusters.

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Gold nanocluster surface ligand exchange: An oxidative stress amplifier for combating multidrug resistance bacterial infection

Meng

et al. 2021

Journal of Colloid and Interface Science

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Tailoring the luminescence of atomic clusters via ligand exchange reaction mediated post synthetic modification

Cited by 5 publications

References 29 publications

Highly Efficient Signal On/Off Electrochemiluminescence Gel Aptasensor Based on a Controlled Release Strategy for the Sensitive Detection of Prostate Specific Antigen

Highly Efficient Signal On/Off Electrochemiluminescence Gel Aptasensor Based on a Controlled Release Strategy for the Sensitive Detection of Prostate Specific Antigen

Controlling the Chemistry of Nanoclusters: From Atomic Precision to Controlled Assembly

Gold nanocluster surface ligand exchange: An oxidative stress amplifier for combating multidrug resistance bacterial infection

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