zhpsЖурнал прикладной спектроскопииZhurnal Prikladnoii Spektroskopii0514-7506B. I. Stepanov Institute of Physics of the National Academy of Scienceszhps-1191Research ArticleАННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙABSTRACTS ENGLISH-LANGUAGE ARTICLESНаносенсор из легированных азотом углеродных точек для высокоселективного обнаружения рибофлавинаNanosensor Composed of N-Doped Carbon Dots for Highly Selective Detection of RiboflavinMengL.MengL.

Биджие

Bijie

mlfsandy@163.comXiaZ.XiaZ.

Биджие

Bijie

ZhangY.ZhangY.

Биджие

Bijie

TanY.TanY.

Биджие

Bijie

YangS.YangS.

Биджие

Bijie

Школа химической инженерии при Университете инженерных наук ГуйчжоуSchool of Chemical Engineering, Guizhou University of Engineering Science202202122022896904904Copyright © Meng L., Xia Z., Zhang Y., Tan Y., Yang S., 20222022Meng L., Xia Z., Zhang Y., Tan Y., Yang S.Meng L., Xia Z., Zhang Y., Tan Y., Yang S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://zhps.ejournal.by/jour/article/view/1191

Гидротермальным методом (200°C, 12 ч) с использованием съедобного гриба Boletus brunneissimus Chiu в качестве источника углерода получены углеродные точки (Bb-CD) с хорошими флуоресцентными характеристиками. Флуоресцентный нанозонд Bb-CD применен для обнаружения рибофлавина и исследован механизм тушения его флуоресценции. Структура и оптические свойства Bb-CD охарактеризованы методами просвечивающей электронной микроскопии, рентгеновской дифракции, рентгеновской фотоэлектронной спектроскопии, ИК-Фурье и спектроскопии в УФ и видимой областях. Для диапазона концентраций рибофлавина C = 0–50 мкМ эффект тушения флуоресценции Bb-CD (у) описывается линейной зависимостью: y = 0.00304C + 0.02151 (R2 = 0.99497), предел обнаружения 45 нМ. Следовательно, Bb-CD показывают высокую чувствительность и низкий предел обнаружения рибофлавина. Механизм тушения флуоресценции Bb-CD рибофлавином относится к эффекту флуоресцентного внутреннего фильтра. Bb-CD использованы в качестве флуоресцентного нанозонда для обнаружения рибофлавина в реальных образцах фруктов. 

Boletus brunneissimus Chiu carbon dots (Bb-CDs) with good fluorescence performance were successfully prepared by the hydrothermal method (200°C, 12 h) using the edible fungus Boletus brunneissimus Chiu as the carbon source. The Bb-CD fluorescent nanoprobe was applied to detection of riboflavin, and its fluorescence-quenching mechanism was investigated. The structure and optical properties of the Bb-CDs were characterized by transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and ultraviolet–visible spectroscopy. In the riboflavin concentration (C) range of 0–50 μM, the fluorescence-quenching effect of the Bb-CDs (y) showed a good linear relationship with the riboflavin concentration. The linear equation was y = 0.00304C + 0.02151 (R2 = 0.99497), and the detection limit was 45 nM. Therefore, the Bb-CDs showed high detection sensitivity and a low detection limit for riboflavin. Moreover, the fluorescence-quenching mechanism of the Bb-CDs by riboflavin belonged to the fluorescent inner filter effect. The Bb-CDs were successfully used as a fluorescent nanoprobe to detect riboflavin in actual fruit samples, which provides a new concept for application of CDs to biological detection. 

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The authors declare that there are no conflicts of interest present.