Facile Detection of Cucurbit[7]uril by Rhodamine B-decorated Nanoparticles

Prakash, Ramesh; Usha, Govindaraj; Piramuthu, Lakshminarayanan; Selvapalam, Narayanan

doi:10.1246/cl.170483

Cited by 11 publications

(7 citation statements)

References 46 publications

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“…The fluorescence sensor probe, RBCN was synthesized according to the reported procedure [20] Briefly, Rhodamine B and copper sulfate (1 mM) were prepared in 200 mL of water. To this, hydrazine hydrate (30%, 100 µL) was added dropwise and allowed to stir for 24 hrs.…”

Section: Resultsmentioning

confidence: 99%

“…Detailed isolation and purification of RBCN has been published [20], in which the residual removal of rhodamine B was the key success, which has been achieved by the multiple washings of acetone and water and that allowed to turn off the fluorescence. Upon addition of amino acids, the fluorescence was turn-on depends on the competitive binding affinity between rhodamine B and the respective amino acids.…”

Section: Resultsmentioning

confidence: 99%

“…We recently reported, a rhodamine B decorated copper nanoparticle for detection of CB7 with a simple fluorescence turn-on method. In the reported method, the rhodamine B tethered copper nanoparticle released the rhodamine B based on the higher binding affinity of CB7 towards the rhodamine B to act as a sensor for CB7 and that also displayed good selectivity towards the CB7 compared to the other homologues such as CB6 and others [20]. Similarly, we also have published another sensor for CB7 using the graphene oxide bound rhodamine B [21].…”

Section: Introductionmentioning

confidence: 99%

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Colorimetric Determination of Amino Acids using Fluorescent Copper Nanoparticle

2019

IJITEE

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Among the 20 amino acids, cysteine plays a major role in communication of the cells, especially towards immune system and thus developing sensor for cysteine is very important to understand the status of the human health. Copper nanoparticles decorated with Rhodamine B (RBCN) have the potential to detect the biologically important species such as amino acids, especially cysteine. RBCN has been previously has demonstrated for the sensing of host molecules such as cucurbituril based on the relative binding potential of rhodamine B on the surface of copper nanoparticles. Based on that concept, now we have developed the sensor for amino acids, especially for the cysteine

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Colorimetric Determination of Amino Acids using Fluorescent Copper Nanoparticle

2019

IJITEE

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“…It has been manifested that fluorescence properties and photochemical stability of a fluorescence probe can be developed by encapsulating it with a host molecule as cucurbit[n]uril due to altered microenvironment . CB[6] promotes the fluorescence intensity of fluorescence dyes by preventing their dimer aggregation and fitting the dyes in to the cavity of the host through carbonyl‐lined portals …”

Section: Introductionmentioning

confidence: 99%

Preparation of Curcubit[6]uril functionalized CuO Nanoparticles: A New Nanosensing Scheme Based on Fluorescence recovery after FRET for the Label Free Determination of Dopamine

2020

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In this manuscript, the aim is to functionalize CuO nanoparticles with the supramolecular host molecule, in this case curcubit[6]uril to have a host guest interaction between the CuO nanoparticles and probe (guest) molecules. Acridine Orange (AO) is applied as a guest molecule. Acridine orange binds with curcubit[6]uril via its carbonyl rims. In the presence of curcubit[6]uril conjugated CuO nanoparticles, the fluorescence intensity of AO is quenched by the CuO NPs through fluorescence resonance energy transfer phenomenon. However, dopamine adsorbs on the surface of CuO nanoparticles by getting incorporated into CB[6] host molecules and kicks out AO from curcubit[6]uril pocket, thus, discouraging fluorescence resonance energy transfer phenomenon and thus enhancing fluorescence intensity of AO by a factor of 3. This fluorescence recovery has been utilized to design a new detection system for dopamine. The assay, measured at fluorescence excitation and emission wavelengths of 480 nm and 520 nm respectively, works in the 0-40 μM concentration range of dopamine with 40 nM limit of detection. This method is not interfered by ascorbic acid, uric acid, glucose, tryptophan and acetaminophen. The proposed method provides a good recovery from synthetic samples and shows good stability.

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“…Furthermore, visible dye based CB sensor would also support the synthesis of functionalized CBs, for which we require a facile sensor for the laboratory use. Recently, our research group have published a CB sensor based on a rhodamine B decorated copper nanoparticle by the method of fluorescence turn-on technique [19]. In a similar way, we have explored the utilization of graphene oxide as a core material, on which rhodamine B was bound non-covalently.…”

Section: Introductionmentioning

confidence: 99%

Brilliant Green Decorated Graphene Oxide for the Detection of Cucurbit[7]uril

2019

IJITEE

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Among the synthetic receptors, Cucurbiturils have gained much attention recent days due to their unique binding potential with variety of drugs and dyes. However, no facile detection method using UV-vis spectroscopy has been developed. Here, we have developed the brilliant green decorated graphene oxide (BGGO) for the detection of cucurbit[7]uril (CB[7]) with good selectivity and sensitivity. Thus, BGGO could able to detect the CB[7] and turn on the release of brilliant green quantitatively. Among the sensors for CB[7], BGGO is the low-cost and sensitive sensor for CB[7] with high selectivity

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Facile Detection of Cucurbit[7]uril by Rhodamine B-decorated Nanoparticles

Cited by 11 publications

References 46 publications

Colorimetric Determination of Amino Acids using Fluorescent Copper Nanoparticle

Colorimetric Determination of Amino Acids using Fluorescent Copper Nanoparticle

Preparation of Curcubit[6]uril functionalized CuO Nanoparticles: A New Nanosensing Scheme Based on Fluorescence recovery after FRET for the Label Free Determination of Dopamine

Brilliant Green Decorated Graphene Oxide for the Detection of Cucurbit[7]uril

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