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• W2914832950 abstract "Highly luminescent and water-soluble carbon quantum dots (CQDs) have been integrated into polyvinyl alcohol (PVA) recently to realize composites with synergistic functionalities. The effects of chemical interactions between CQDs and PVA matrix on the changes in optical properties of CQDs or physicochemical properties of PVA are yet to be investigated fully. Herein, we first synthesized CQDs with different surface chemistry via varying the molar ratio between citric acid (CA) and ethylenediamine and then embedded the CQDs into PVA with or without additional CA crosslinking. Infrared and UV–vis studies on CQDs and composites showed that condensation between CQDs and PVA induced a redshift in the absorption peak originating from CQDs’ surface fluorophore groups. Interestingly, CA crosslinking significantly increased the water resistance, but it quenched the photoluminescence of composites. The quenching effects were reduced by using CQDs having less reactivity with CA." @default.
• W2914832950 created "2019-02-21" @default.
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• W2914832950 date "2019-06-01" @default.
• W2914832950 modified "2023-10-01" @default.
• W2914832950 title "Crosslinking induced photoluminescence quenching in polyvinyl alcohol-carbon quantum dot composite" @default.
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• W2914832950 doi "https://doi.org/10.1016/j.mtchem.2019.01.003" @default.
• W2914832950 hasPublicationYear "2019" @default.
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