Water-soluble host-guest system from β-cyclodextrin as a fluorescent sensor for aluminium ions: synthesis and sensing studies

In this paper, a simple small molecule (L) based on 4-(diethylamino)-2-hydroxy-benzaldehyde and carbohydrazide has been synthesized and characterized. Moreover, under ultrasonic conditions, a host-guest system with β-cyclodextrin and L was obtained. According to the hybridization process, the host-g...

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Veröffentlicht in:Dalton transactions : an international journal of inorganic chemistry 2015-10, Vol.44 (37), p.16528-16533
Hauptverfasser: Liu, Z C, Zhu, W P, Chen, Y H, Li, Y X, Ding, Y J, Yang, W J, Li, K
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Sprache:eng
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Zusammenfassung:In this paper, a simple small molecule (L) based on 4-(diethylamino)-2-hydroxy-benzaldehyde and carbohydrazide has been synthesized and characterized. Moreover, under ultrasonic conditions, a host-guest system with β-cyclodextrin and L was obtained. According to the hybridization process, the host-guest system showed excellent water solubility. The investigation of the fluorescence spectra revealed that the host-guest system exhibited a characteristic fluorescence behavior toward Al(3+) in a pure water environment. Upon addition of Al(3+), the host-guest system showed a strong blue fluorescence, which resulted from the fluorophore of L after the coordination of β-CD-L and Al(3+) with a high binding constant (k = 3.1626 × 10(11) M(-1)). In addition, SEM images demonstrated that the host-guest system expressed good crystallization behavior. Fluorescence microscope images of onion epidermal cells with β-CD-L-Al(3+) proved that the water-soluble host-guest system possessed a high ability for cell permeability.
ISSN:1477-9226
1477-9234
DOI:10.1039/c5dt02220g