Cucurbit[6]uril nanocavity as an enhanced spectrofluorimetric method for the determination of pyrene

Occello, Valeria Noemí Sueldo; Veglia, Alicia V.

doi:10.1016/j.aca.2011.01.027

Cited by 24 publications

(19 citation statements)

References 66 publications

(75 reference statements)

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“…As reported [35] for the adsorption of pyrene onto cucurbit [6]uril cavity, the changes in the fluorescence emission can be attributed to both the complex formation and the hydrophobic interactions. Accordingly, the fluorescence intensity of pyrene is slightly affected by pristine HNT (Figure 7), which possesses an hydrophilic nature.…”

Section: Molecules)mentioning

confidence: 81%

Ecocompatible Halloysite/Cucurbit[8]uril Hybrid as Efficient Nanosponge for Pollutants Removal

et al. 2016

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Hybrid materials based on halloysite nanotubes (HNT) and cucurbit [8]uril (CB[8]) were prepared with the aim to obtain efficient nanosponges towards hydrocarbons both in liquid and vapor phases. The loading on both HNT surfaces and the hybrid morphology were evidenced by FTIR spectroscopy, thermogravimetric analysis and scanning electron microscopy. In order to highlight the interactions in the hybrid 13 C { 1 H} CP-MAS NMR experiments were performed. The aqueous colloidal stability of HNT/CB[8] was highlighted through z potential and dynamic light scattering measurements. The HNT/CB[8] composite was employed as nanosponge to capture aromatic oils in aqueous phase as evidenced by fluorescence emission spectra of pyrene. These results were correlated with the adsorption capacity of the hybrid toward toluene in vapor phase. This paper provides an efficient way to prepare a biocompatible hybrid material that could be used as a potential multi-pockets nano-container for decontamination of polluted water and/or air.

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Section: Molecules)mentioning

confidence: 81%

Ecocompatible Halloysite/Cucurbit[8]uril Hybrid as Efficient Nanosponge for Pollutants Removal

et al. 2016

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“…To our surprise, the I 3 / I 1 of pyrene in AgCh gel was 1.7 (Figure ), which is similar to that of pyrene in degassed cyclohexane . Such a high hydrophobicity in a hydrogel is not expected and has never been observed in any other hydrogels, micelles or macromolecules (Table ) like cyclodextrin, calixarene and cucurbituril . A comparison was made with NaCh (15 m m ) above its critical micelle concentration (CMC), which showed a I 3 / I 1 value of 0.7 (Figure ).…”

Section: Figurementioning

confidence: 99%

A Stimuli‐Responsive Metallohydrogel Exhibiting Cyclohexane‐Like Hydrophobicity

Laishram

Maitra

2017

Chemistry An Asian Journal

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Silver(I) forms a hydrogel in the presence of cholate with unusual properties, which are not observed with other cations. Polarity-sensitive probes have shown that the spherical aggregates observed in the gel have 'pockets' with hydrophobicity comparable to that of degassed cyclohexane. The gel exhibited thermo- and mechanoresponsive properties. Color tunability from blue to cyan and green was observed with prodan. The two sol phases of the gel formed by applying stress and temperature showed very different properties.

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“…In the field of supramolecular analytical chemistry [21], we have previously proposed the applicability of CB6 as nanosensor for determining pyrene by developing an alternative analytical method based on enhanced fluorescence spectroscopy at room temperature of the polycyclic aromatic hydrocarbon in presence of this macrocycle [22]. The application of the proposed method was demonstrated in spiked samples of tap water and tea with very good recoveries [22].…”

Section: Introductionmentioning

confidence: 98%

“…The application of the proposed method was demonstrated in spiked samples of tap water and tea with very good recoveries [22].…”

Section: Introductionmentioning

confidence: 99%

Complexation (cucurbit[6]uril-pyrene): Thermodynamic and spectroscopic properties

Occello

Rossi

Veglia

2015

Journal of Luminescence

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Cucurbit[6]uril nanocavity as an enhanced spectrofluorimetric method for the determination of pyrene

Cited by 24 publications

References 66 publications

Ecocompatible Halloysite/Cucurbit[8]uril Hybrid as Efficient Nanosponge for Pollutants Removal

Ecocompatible Halloysite/Cucurbit[8]uril Hybrid as Efficient Nanosponge for Pollutants Removal

A Stimuli‐Responsive Metallohydrogel Exhibiting Cyclohexane‐Like Hydrophobicity

Complexation (cucurbit[6]uril-pyrene): Thermodynamic and spectroscopic properties

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