Fluorescence Quenching of CdTe Quantum Dots with Co (III) Complexes via Electrostatic Assembly Formation

Pal, Anuushka; Arora, Bhawna; Rani, D. Soumya; Srivastava, Sumit; Gupta, Rajeev; Sapra, Sameer

doi:10.1515/zpch-2018-1138

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…cationic) nanoparticles and cationic (resp. anionic) polymers or inorganic complexes, − whether the nanoparticle is the quenched fluorophore (e.g., QDs) or the quencher (e.g., silver and gold nanoparticles).…”

Section: Resultsmentioning

confidence: 99%

Homogeneous Resonant Energy Transfer within Clusters of Monodisperse Colloidal Quantum Dots

et al. 2022

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As fluorescent nanocrystals, colloidal quantum dots (QDs) are increasingly used for biosensing thanks to their ability to perform Forster resonant energy transfer (FRET). Especially, all-QD-based donor− acceptor systems offer promising approaches for the design of FRET biosensors. But contrary to molecular fluorophores, QD emission properties are highly conditioned by the size distribution of QDs, so it is possible to observe energy transfers between QDs coming from the same monodisperse population, when packed into clusters. Here, we characterize such homogeneous resonant energy transfer (homo-FRET) processes occurring between CdTe QDs clustered within an organosilane polymer matrix and develop a mathematical model to account for their efficiencies. We evidence the critical role of the statistical donor−acceptor polarization of the QD population and provide tools to quantify it. Interestingly, as QD−QD homo-FRET proves to only depend on size dispersion and Stokes shift, the conclusions of our study can be extended to any kind of QDs and our model can be used to predict their own homo-FRET efficiency.

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Section: Resultsmentioning

confidence: 99%

Homogeneous Resonant Energy Transfer within Clusters of Monodisperse Colloidal Quantum Dots

et al. 2022

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“…An absence of the emergence of any new peaks or disappearance of existing peaks circumvent the possibility of any ground state complex formation or the oxidation of a QD surface, within the linear range of the sensor. 42 Another important observation is diminishing of the peaks upon increasing the concentration of H 2 O 2 further at 500 nM (pink line) and fully gone for 750 nM (yellow line). An ample explanation for this behaviour would be the degradation of the sensor material in the presence of higher concentrations of H 2 O 2 .…”

Section: Mechanism Of Sensingmentioning

confidence: 98%

Synthesis and characterization of CdTe QDs capped with a branched 3MB3MP ligand and fluorescent switching detection of H₂O₂

Choudhary

Nageswaran

2022

New J. Chem.

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The theoretical investigation of the opto-electronic properties of designed molecules having 2-(2-Methylene-3-oxo-indane-1-ylidene)malononitrile as end-capped acceptors

Tariq

Ramzan

Ahmad

et al. 2020

Zeitschrift Für Physikalische Chemie

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AbstractFive acceptor-donor-acceptor molecules having different core units with 2-(2-Methylene-3-oxo-indane-1-ylidene)malononitrile as end capped terminal acceptor unit were designed. The ground state geometries and electronic properties were calculated by using density functional theory (DFT) at MPW1PW91/6-31G(d,p) level of theory. The absorption spectra were computed by using time dependent DFT at MPW1PW91/6-31G(d,p) level of theory. The designed molecules have broad absorption range in visible region. M3 shows relatively lower band gap so that having high light harvesting efficiency (LHE). The molecules consider as better hole blocking materials in term of high ionization potentials. The reorganization energies calculation of M1, M2 and M4 manifests that these molecules are the optimal candidate for electron transportation. High value of Voc has been observed for molecules which would favorably contribute in power conversion efficiency. M1, M2, M4 and M5 are more stable in terms of absolute hardness and electrostatic potential surfaces. All molecules show good opto-electronic properties in the aspect of their use in photovoltaic application.

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Fluorescence Quenching of CdTe Quantum Dots with Co (III) Complexes via Electrostatic Assembly Formation

Cited by 5 publications

References 28 publications

Homogeneous Resonant Energy Transfer within Clusters of Monodisperse Colloidal Quantum Dots

Homogeneous Resonant Energy Transfer within Clusters of Monodisperse Colloidal Quantum Dots

Synthesis and characterization of CdTe QDs capped with a branched 3MB3MP ligand and fluorescent switching detection of H₂O₂

The theoretical investigation of the opto-electronic properties of designed molecules having 2-(2-Methylene-3-oxo-indane-1-ylidene)malononitrile as end-capped acceptors

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Fluorescence Quenching of CdTe Quantum Dots with Co (III) Complexes via Electrostatic Assembly Formation

Cited by 5 publications

References 28 publications

Homogeneous Resonant Energy Transfer within Clusters of Monodisperse Colloidal Quantum Dots

Homogeneous Resonant Energy Transfer within Clusters of Monodisperse Colloidal Quantum Dots

Synthesis and characterization of CdTe QDs capped with a branched 3MB3MP ligand and fluorescent switching detection of H2O2

The theoretical investigation of the opto-electronic properties of designed molecules having 2-(2-Methylene-3-oxo-indane-1-ylidene)malononitrile as end-capped acceptors

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Synthesis and characterization of CdTe QDs capped with a branched 3MB3MP ligand and fluorescent switching detection of H₂O₂