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SETSCI - Volume (2018)
ISAS 2018 - Ist International Symposium on Innovative Approaches in Scientific Studies, Kemer-Antalya, Turkey, Apr 11, 2018

Effect of Carbon Source in Preparation of Heteroatom Doped Carbon Quantum Dots as Fluorescent Probe for Amino Acids (ISAS 2018_135)
Funda Çopur1*, Erhan Zor2, Sabri Apaydın3, Haluk Bingöl4
1Kimya Bölümü, Fen Bilimleri Enstitüsü, Necmettin Erbakan Üniversitesi, Konya, Turkey
2Fen Bilgisi Öğretmenliği Anabilim Dalı, Ahmet Keleşoğlu Eğitim Fakültesi, Necmettin Erbakan Üniversitesi , Konya, Turkey
3KimyaÖğretmenliği Anabilim Dalı, Ahmet Keleşoğlu Eğitim Fakültesi, Necmettin Erbakan Üniversitesi , Konya, Turkey
4KimyaÖğretmenliği Anabilim Dalı, Ahmet Keleşoğlu Eğitim Fakültesi, Necmettin Erbakan Üniversitesi , Konya, Turkey
* Corresponding author: fundacopur07@gmail.com
Published Date: 2018-06-23   |   Page (s): 144-145   |    58     3

ABSTRACT Molecular interactions have been a hot topic in chemistry because of their importance in different processes from biological activities [1]. Quantum dots with strong and easily tunable luminescence and high emission quantum yields have become well-established photoluminescent nanomaterials for the sensing of biological molecules. In recent years carbon-based quantum dots (CQDs) have attracted substantial research interest due to their outstanding merits in terms of full-color luminescence, stability, biocompatibility and low cost. In the literature, different starting materials and therefore procedures have been reported for the preparation of carbon-based quantum dots (CQDs). Herein, different CQDs were synthesized using starting materials based on carbon and nitrogen. Glutathione, as nitrogen source, was kept stable and we changed carbon source by using citric acid, glucose and glutamic acid. A one-step pyrolysis method was used by mixing adequate quantity of carbon and nitrogen  source. [2]. After this process, column chromatography was used for the purification of the resultant CQDs and to remove the precursors. The quantum yields were estimated as 58.9%, 27.0% and 8.2% for glutathione-citric acid, glutathione-glucose and glutathione-glutamic acid couples, respectively. After the characterization of CQDs were performed, the sensing capability of the obtained CQDs towards alanine, arginine, asparagine, aspartic acid, cysteine, cystine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, valine was determined in solution phase by following the change in photoluminescence intensity.
 
KEYWORDS Amino acids, Fluorescent sensor, Glutathione, Carbon quantum dot, Quantum yield
REFERENCES [1]Zhang, J., et al., Advanced Materials, 2017, 29, 1700296.
[2]Toloza, C.A.T, et al., Journal of Luminescence 2016, 179, 83–92.

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