Thin sensing layer based on semi-conducting β-cyclodextrin rotaxane for toxic metals detection

Teka, Safa; Gaied, Aymen; Jaballah, Nejmeddine; Sun, Xiaonan; Majdoub, Mustapha

doi:10.1016/j.materresbull.2015.10.040

Cited by 13 publications

(6 citation statements)

References 47 publications

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“…At 0 V polarization potential, the rotaxane structure has the lowest value of the relaxation times τ 0 compared with TDPAn . This behavior can be attributed to the greater delocalization of charge carriers in rotaxane [24] . Indeed, these results are in good agreement with those obtained in the J‐V study and confirm that TDPAnβ ‐ CD is more conductive than TDPAn .…”

Section: Resultssupporting

confidence: 89%

“…This behavior can be attributed to the greater delocalization of charge carriers in rotaxane. [24] Indeed, these results are in good agreement with those obtained in the J-V study and confirm that TDPAnβ-CD is more conductive than TDPAn.…”

Section: Chemistryselectsupporting

confidence: 87%

“…It enhances also the photoluminescence quantum yield [22] and increases the charge carrier mobility in the organic thin films [23] . In previous work, it was proved that cyclodextrin‐based semi‐conducting rotaxanes have promising perspectives in the conception of sensitive membranes for toxic metals detection [24] …”

Section: Introductionmentioning

confidence: 99%

“…[23] In previous work, it was proved that cyclodextrin-based semi-conducting rotaxanes have promising perspectives in the conception of sensitive membranes for toxic metals detection. [24] This work aims to combine the good optical and electrical properties of the anthracene-based semi-conductors with the physicochemical and structural advantages of the β-cyclodextin, in order to obtain a rotaxane structure with original optical, morphological and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

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Anthracene and β‐Cyclodextrin Based Supramolecular Semi‐Conducting Thin Film: Effect of the Encapsulation on the Optical and Electrical Properties

et al. 2022

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In this study, we describe the synthesis of a host-guest supramolecule (TDPAnβ-CD) formed from an anthracene-based conjugated molecule (TDPAn, guest) encapsulated in cyclodextrin (β-CD, host) under microwave irradiation. The obtaining of the desired rotaxane was confirmed by different spectroscopic and thermal analyzes. A comparative study between the physicochemical and electrical properties of the free molecule (TDPAn) and those of the rotaxane (TDPAnβ-CD) was conducted. Thermal analyzes show an amorphous morphology and good thermal stability for the rotaxane. The surface morphology of the synthesized materials was studied using atomic force microscopy and contact angle measurement. The supramolecular film exhibits a smooth and homogeneous surface with a relatively low surface roughness compared to that of the free model. The absorption and photoluminescence spectra of the rotaxane thin film are blue-shifted in comparison with TDPAn, due to a steric hindrance effect of the β-CD. Hence, a blue intense photoluminescence was emitted from the rotaxane layer, compared to a violet-red emission in the case of non-encapsulated TDPAn. Higher electron affinity and ionization potential for the host-guest supramolecule were observed by cyclic voltammetry. The static study of ITO/ TDPAn/Al and ITO/TDPAnβ-CD/Al schottky single layer diodes showed typical behaviors with relatively low threshold voltages and higher charge carrier mobility was achieved for the rotaxane active layer.

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Section: Resultssupporting

confidence: 89%

Section: Chemistryselectsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Anthracene and β‐Cyclodextrin Based Supramolecular Semi‐Conducting Thin Film: Effect of the Encapsulation on the Optical and Electrical Properties

et al. 2022

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“…Cyclodextrins are supramolecular hosts that are used widely for a variety of applications, including drug delivery [1][2][3], odor neutralization [4], supramolecular catalysis [5][6][7], and toxicant detection [8,9]. Their hydrophobic interiors allow them to form inclusion complexes with hydrophobic guests [10,11], while their hydrophilic exteriors impart aqueous solubility [12,13].…”

Section: Introductionmentioning

confidence: 99%

Towards Rational Chemosensor Design through Improved Understanding of Experimental Parameter Variation and Tolerance in Cyclodextrin-Promoted Fluorescence Detection

et al. 2017

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We have previously developed a highly efficient fluorescence-based toxicant-detection method that operates in complex environments to detect aromatic toxicants and toxicant metabolites with high sensitivity and selectivity. This method relies on the ability of γ-cyclodextrin to act as a supramolecular scaffold, and uses a variety of non-covalent interactions between the cyclodextrin, toxicant, and fluorophore to enable efficient detection. Reported herein is an investigation of the effect of various experimental parameters, including host concentration, temperature, pH, salt, and solvent, on the observed energy-transfer efficiencies. These results advance our understanding of γ-cyclodextrin-based association complexes and provide crucial information for the development of fluorescence-based sensors using such complexation and the resultant fluorescence-based detection.

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2017

Cyclodextrins

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Thin sensing layer based on semi-conducting β-cyclodextrin rotaxane for toxic metals detection

Cited by 13 publications

References 47 publications

Anthracene and β‐Cyclodextrin Based Supramolecular Semi‐Conducting Thin Film: Effect of the Encapsulation on the Optical and Electrical Properties

Anthracene and β‐Cyclodextrin Based Supramolecular Semi‐Conducting Thin Film: Effect of the Encapsulation on the Optical and Electrical Properties

Towards Rational Chemosensor Design through Improved Understanding of Experimental Parameter Variation and Tolerance in Cyclodextrin-Promoted Fluorescence Detection

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