Fluorescent carbon dot–molecular salt hydrogels

Cayuela, Angelina; Kennedy, Stuart; Soriano, M. Laura; Jones, Christopher D.; Valcárcel, Miguel; Steed, Jonathan W.

doi:10.1039/c5sc01859e

Cited by 93 publications

(81 citation statements)

References 69 publications

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“…In contrast, a-CQDs (Fig. 5C) is able to detect Pb 2+ ions by combining the data from CQDGs and liquid-phase system for removing other metal interferences as we reported previously [24].…”

Section: Sensing Behavior Of Cqdgs Towards Metal Ionsmentioning

confidence: 85%

“…The CQD gels were prepared using a simple approach as described in our previous work [24] using a gelator 1 (1 wt%, 5 mg) and 2% (10 µL) of BMIM-BF 4 which were added to 500 µL of CQDs (1 mg·mL -1 ) in aqueous solution. The mixture was sonicated for one minute and warmed for 30 s with a heat gun.…”

Section: Preparation Of Cqd Gelsmentioning

confidence: 99%

“…Recently the formation of gels based on carbon-based nanodots had been reported [20][21][22][23][24], but few analytical applications had been described until now. Quaranta et al reported the formation of a thin xerogel film of carbon-based nanodots to scintillators detectors and Hu et al used Carbon Dot Gels (CDGs) as part of a sensing system for the direct detection of Cu 2+ .…”

Section: Introductionmentioning

confidence: 99%

“…In our previous work [24], we have successfully prepared novel hydrogels based on CQDs and CNDs with different functionalities by a simple one-step heat-sonication process with the existence of 2% of ionic liquid (IL), 1-butyl-3-methylimidazolium tetrafluoroborate (BMIM-BF 4 ). Thanks to the introduction of different superficial end groups, the as-prepared CQDGs possess different affinity for metal ions, which forms a basis for their extensive applications in analytical nanoscience and nanotechnology.…”

Section: Introductionmentioning

confidence: 99%

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Fluorescent carbon quantum dot hydrogels for direct determination of silver ions

Cayuela

Soriano

Kennedy

et al. 2016

Talanta

112

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Citation for published item:gyuelD engelin nd orinoD wF vur nd uennedyD turt F nd teedD tF F nd l¡ relD wF @PHITA 9pluoresent ron quntum dot hydrogels for diret determintion of silver ionsF9D lntFD ISI F ppF IHHEIHSF Further information on publisher's website: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. ABSTRACTThe paper reports for the first time the direct determination of silver ion (Ag + ) using luminescent Carbon Quantum Dot hydrogels (CQDGs). Carbon Quantum Dots (CQDs) with different superficial moieties (passivate-CQDs with carboxylic groups, thiol-CQDs and amine-CQDs) were used to prepare hybrid gels using a low molecular weight hydrogelator (LMWG). The use of the gels results in considerable fluorescence enhancement and also markedly influences selectivity. The most selective CQDG system for Ag + ion detection proved to be those containing carboxylic groups onto their surface. The selectivity towards Ag + ions is possibly due to its flexible coordination sphere compared with other metal ions.This fluorescent sensing platform is based on the strong Ag-O interaction which can quench the photoluminescence of passivate-CQDs (p-CQDs) through charge transfer. The limit of detection (LOD) and quantification (LOQ) of the proposed method were 0.55 and 1.83 µg·mL -1 , respectively, being applied in river water samples.

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“…In contrast, a-CQDs (Fig. 5C) is able to detect Pb 2+ ions by combining the data from CQDGs and liquid-phase system for removing other metal interferences as we reported previously [24].…”

Section: Sensing Behavior Of Cqdgs Towards Metal Ionsmentioning

confidence: 85%

Section: Preparation Of Cqd Gelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fluorescent carbon quantum dot hydrogels for direct determination of silver ions

Cayuela

Soriano

Kennedy

et al. 2016

Talanta

112

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“…Due to their large surface areas, fibrous gels can serve as supports for catalytic particles, enzymes or quantum dots, or as tuneable media for controlling crystallisation and nanofabrication processes. 39,[118][119][120][121][122][123][124] Precipitation in a gel may deliver materials with unusual crystal structures or particle Fig. 6 Structure of L-proline-based gelator 5 and reaction schemes illustrating the dominant reaction pathways in its gels and sols.…”

Section: Switchable Gelationmentioning

confidence: 99%

Gels with sense: supramolecular materials that respond to heat, light and sound

2016

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. (2016) 'Gels with sense : supramolecular materials that respond to heat, light and sound.', Chemical society reviews., 45 (23). pp. 6546-6596. Further information on publisher's website:https://doi.org/10.1039/C6CS00435KPublisher's copyright statement:Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Advances in the field of supramolecular chemistry have made it possible, in many situations, to reliably engineer soft materials to address a specific technological problem. Particularly exciting are "smart" gels that undergo reversible physical changes on exposure to remote, non-invasive environmental stimuli. This review explores the development of gels which are transformed by heat, light and ultrasound, as well as other mechanical inputs, applied voltages and magnetic fields. Focusing on small-molecule gelators, but with reference to organic polymers and metal-organic systems, we examine how the structures of gelator assemblies influence the physical and chemical mechanisms leading to thermo-, photo-and mechano-switchable behaviour. In addition, we evaluate how the unique and versatile properties of smart materials may be exploited in a wide range of applications, including catalysis, crystal growth, ion sensing, drug delivery, data storage and biomaterial replacement.

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