The molecular recognition of β-cyclodextrin modified CdSe quantum dots with tyrosine enantiomers: Theoretical calculation and experimental study

Cao, Ya; Wu, Shuangshuang; Liang, Yaozhen; Yu, Ying

doi:10.1016/j.molstruc.2012.01.015

Cited by 12 publications

(4 citation statements)

References 19 publications

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“…In this paper, we developed a new strategy to prepare reusable xerogels containing QDs (cadmium telluride (CdTe), one of the typical QDs) with high fluorescence retention, which may pave the way to overcome those obstacles with following advantages: (a) the CdTe nanocrystals are immobilized in the polymer matrix via common polymerization procedure and dried at ambient atmosphere; (b) the xerogels could load a large amount of CdTe (ideally, the maximum is 50 wt % of the final xerogel) and exhibited strong emission, maintaining 85% of the QD solution fluorescence intensity; (c) the xerogels could be reused, alleviating the potential hazards caused by abandoned QDs; and (d) the presence of βCD molecules on the surface of CdTe make the xerogels potential treasure houses to be excavated (isomers, chiral distinctions, etc.) [ 41 , 42 , 43 , 44 , 45 ]. In addition, the xerogels showed the potential to act as biosensors also by entrapping corresponding enzymes.…”

Section: Introductionmentioning

confidence: 99%

Reusable Xerogel Containing Quantum Dots with High Fluorescence Retention

et al. 2018

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Although various analytical methods have been established based on quantum dots (QDs), most were conducted in solution, which is inadequate for storage/transportation and rapid analysis. Moreover, the potential environmental problems caused by abandoned QDs cannot be ignored. In this paper, a reusable xerogel containing CdTe with strong emission is established by introducing host–guest interactions between QDs and polymer matrix. This xerogel shows high QDs loading capacity without decrease or redshift in fluorescence (the maximum of loading is 50 wt % of the final xerogel), which benefits from the steric hindrance of β-cyclodextrin (βCD) molecules. Host–guest interactions immobilize QDs firmly, resulting in the excellent fluorescence retention of the xerogel. The good detecting performance and reusability mean this xerogel could be employed as a versatile analysis platform (for quantitative and qualitative analyses). In addition, the xerogel can be self-healed by the aid of water.

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Section: Introductionmentioning

confidence: 99%

Reusable Xerogel Containing Quantum Dots with High Fluorescence Retention

et al. 2018

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“…Further to photoluminescence, others have used spectroscopic techniques based on the changes in fluorescence from the CD-QD conjugates for enantiorecognition. [125][126][127] The fluorescence intensity was observed to increase for the complexation with the l-form of the chosen chiral aromatic amino acids, however, interestingly, Zhou et al reported that the photoluminescence intensity increased more for d-Tryptophan compared to l-Tryptophan, being the opposite result reported by Wei et al, although slightly different methods were used. A variation of observing changes in luminescence or fluorescence is detecting changes in the electrochemiluminescence, working in a similar principle, whereby the measured intensity of signal changes due to discriminative chiral complexation within the conjugated CD.…”

Section: Other Enantioselective Techniquesmentioning

confidence: 80%

“…observed photoluminescence changes arising from complexation, however, a distinct wavelength shift was also characterized after complexing with one chiral form due to a selective hydrolysis step. Further to photoluminescence, others have used spectroscopic techniques based on the changes in fluorescence from the CD‐QD conjugates for enantiorecognition . The fluorescence intensity was observed to increase for the complexation with the l ‐form of the chosen chiral aromatic amino acids, however, interestingly, Zhou et al.…”

Section: Cyclodextrin Functionalised Nanomaterials In Chiral Recognitionmentioning

confidence: 99%

Cyclodextrin‐Functionalised Nanomaterials for Enantiomeric Recognition

Hobbs

Řezanka

2020

ChemPlusChem

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which are glucose-based cyclic oligosaccharides, are materials that can act inherently as chiral selectors, with many reports of the application of cyclodextrins in enantioseparation. However, many studies have encountered the problem of insufficient enantioselective performance of the chiral selector. One of the main reasons is due to low surface concertation's, whereby interaction between the chiral selector and analyte usually occurs at a surface. Thus, scientists have been trying for the last two decades to overcome this problem, with the incorporation of nanomaterials being promising as they possess a large surface area which allows for the accommodation of a higher concentration of the chiral selectors. Herein, we outline nanomaterial-cyclodextrin conjugates that work in tandem to achieve or enhance enantioselectivity through various methods such as chromatography, adsorption, and removal using magnetic nanoparticles, or enantiorecognition using electrochemical techniques.

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“…Among them, full methylation causes remarkable distortion of the β-CD macrocycle, increasing the water solubility as well as adjusting the molecular inclusion effect. In our previous work, the molecular recognition of mono-(6-mercapto)-β-cyclodextrin modified CdSe quantum dots with tyrosine enantiomers was investigated with theoretical calculation and fluorescence spectroscopy, and the functional β-CD/QDs showed better enantio-selectivity to L-tyrosine than that to D-tyrosine [14].…”

Section: Introductionmentioning

confidence: 99%

Permethylated-β-Cyclodextrin Capped CdTe Quantum Dot and its Sensitive Fluorescence Analysis of Malachite Green

Cao

Wei

et al. 2015

J Fluoresc

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In the present work, the CdTe quantum dots were covalently conjugated with permethylated-β-cyclodextrin (OMe-β-CD) using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride as cross-linking reagent. The obtained functional quantum dots (OMe-β-CD/QDs) showed highly luminescent, water solubility and photostability as well as good inclusion ability to malachite green. A sensitive fluorescence method was developed for the analysis of malachite green in different samples. The good linearity was 2.0 × 10(-7)-1.0 × 10(-5) mol/L and the limit of detect was 1.7 × 10(-8) mol/L. The recoveries for three environmental water samples were 92.0-108.2 % with relative standard deviation (RSD) of 0.24-1.87 %, while the recovery for the fish sample was 94.3 % with RSD of 1.04 %. The results showed that the present method was sensitive and convenient to determine malachite green in complex samples. Graphical Abstract The analytical mechanism of OMe-β-CD/QDs and its linear response to MG.

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The molecular recognition of β-cyclodextrin modified CdSe quantum dots with tyrosine enantiomers: Theoretical calculation and experimental study

Cited by 12 publications

References 19 publications

Reusable Xerogel Containing Quantum Dots with High Fluorescence Retention

Reusable Xerogel Containing Quantum Dots with High Fluorescence Retention

Cyclodextrin‐Functionalised Nanomaterials for Enantiomeric Recognition

Permethylated-β-Cyclodextrin Capped CdTe Quantum Dot and its Sensitive Fluorescence Analysis of Malachite Green

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