Capped fluorescent carbon dots for detection of hemin: Role of number of -OH groups of capping agent in fluorescence quenching

Upama Baruah; Neelam Gogoi; Gitanjali Majumdar; Devasish Chowdhury

doi:10.1155/2013/529159

Capped fluorescent carbon dots for detection of hemin: Role of number of -OH groups of capping agent in fluorescence quenching

Upama Baruah, Neelam Gogoi, Gitanjali Majumdar, Devasish Chowdhury^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

We have successfully demonstrated the use of capped carbon dot systems, namely, CDs/β-cd, CDs/LMH, and CDs/Suc, as fluorescent sensors for the detection of hemin. The capped carbon dot systems showed quenching of PL intensity in the presence of hemin. The minimum detection limit was determined to be 1 M. The PL response with free Fe(II) and Fe(III) was also studied. It was observed that PL quenching of capped carbon dot systems in the presence of hemin is dependent on the number of -OH groups in the capping agent. The order of quenching towards hemin was determined to be CDs/β-cd > CDs/LMH = CDs/Suc > CDs. A possible mechanism to account for the observation is also discussed in the paper.

Original language	English
Article number	529159
Journal	The Scientific World Journal
Volume	2013
DOIs	https://doi.org/10.1155/2013/529159
Publication status	Published - 2013
Externally published	Yes

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abstract = "We have successfully demonstrated the use of capped carbon dot systems, namely, CDs/β-cd, CDs/LMH, and CDs/Suc, as fluorescent sensors for the detection of hemin. The capped carbon dot systems showed quenching of PL intensity in the presence of hemin. The minimum detection limit was determined to be 1 M. The PL response with free Fe(II) and Fe(III) was also studied. It was observed that PL quenching of capped carbon dot systems in the presence of hemin is dependent on the number of -OH groups in the capping agent. The order of quenching towards hemin was determined to be CDs/β-cd > CDs/LMH = CDs/Suc > CDs. A possible mechanism to account for the observation is also discussed in the paper.",

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T2 - Role of number of -OH groups of capping agent in fluorescence quenching

AU - Baruah, Upama

AU - Gogoi, Neelam

AU - Majumdar, Gitanjali

AU - Chowdhury, Devasish

PY - 2013

Y1 - 2013

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AB - We have successfully demonstrated the use of capped carbon dot systems, namely, CDs/β-cd, CDs/LMH, and CDs/Suc, as fluorescent sensors for the detection of hemin. The capped carbon dot systems showed quenching of PL intensity in the presence of hemin. The minimum detection limit was determined to be 1 M. The PL response with free Fe(II) and Fe(III) was also studied. It was observed that PL quenching of capped carbon dot systems in the presence of hemin is dependent on the number of -OH groups in the capping agent. The order of quenching towards hemin was determined to be CDs/β-cd > CDs/LMH = CDs/Suc > CDs. A possible mechanism to account for the observation is also discussed in the paper.

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Capped fluorescent carbon dots for detection of hemin: Role of number of -OH groups of capping agent in fluorescence quenching

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