Carbon dots-inspired fluorescent cyclodextrins: competitive supramolecular 'off-on' (bio)sensors
| Autor: | Eduardo De Los Reyes-Berbel, Luis Fermín Capitán-Vallvey, Francisco Javier Lopez-Jaramillo, Francisco Santoyo-Gonzalez, Alfonso Salinas-Castillo, Fernando Hernandez-Mateo, Inmaculada Ortiz-Gomez, Mariano Ortega-Muñoz |
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| Rok vydání: | 2020 |
| Předmět: |
Cyclodextrins
Quenching (fluorescence) Chemistry Supramolecular chemistry Nanotechnology Biosensing Techniques Chromophore beta-Galactosidase Fluorescence Carbon Nitrophenols Cholesterol Quantum dot Quantum Dots Surface modification Humans General Materials Science Well-defined Biosensor Fluorescent Dyes |
| Zdroj: | Digibug: Repositorio Institucional de la Universidad de Granada Universidad de Granada (UGR) Digibug. Repositorio Institucional de la Universidad de Granada instname |
| ISSN: | 2040-3372 |
| Popis: | Chromophore-appended cyclodextrins combine the supramolecular loading capabilities of cyclodextrins (CDs) with the optical properties of the affixed chromophores. Among fluorescent materials, carbon dots (CNDs) are attractive and the feasibility of CND-appended CDs as sensors has been demonstrated by different authors. However, CNDs are intrinsically heterogeneous materials and their ulterior functionalization yields hybrid composites that are not well defined in terms of structure and composition. Inspired by the fluorescence properties of 5-oxo-1,2,3,5-tetrahydroimidazo[1,2-a]pyridine-7-carboxylic acid (IPCA), the most paradigmatic of the molecular fluorophores detected in CNDs, herein we report two highly efficient synthetic chemical strategies for the preparation of IPCA-appended CDs that behave as CND-based CD “turn off–on” biosensors suitable for the analysis of cholesterol and β-galactosidase activity. We have deconstructed the CND–CD systems to demonstrate that (i) the role of CNDs is limited to acting as a support for the molecular fluorophores produced during their synthesis and (ii) the molecular fluorophores suffice for the determination of the enzymatic activity based on the quenching by p-nitrophenol as a sacrificial quencher. Ministerio de Economía, Industria y Competitividad, Spain CTQ2017-86125-P CTQ2016-78754-C2-1-R |
| Databáze: | OpenAIRE |
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