Cation identity dependence of crown ether photonic crystal Pb²⁺ sensing

We quantitatively modeled the volume phase transition of a hydrogel containing a crystalline colloidal array with a crown ether ligand which binds Pb²⁺. The hydrogel volume response and the wavelength diffracted depend on the Pb²⁺ concentration and on both the ionic strength and the valence of the n...

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Veröffentlicht in:	Analytical and bioanalytical chemistry 2007-03, Vol.387 (6), p.2121-2130
Hauptverfasser:	Yan, Fangyong, Asher, Sanford
Format:	Artikel
Sprache:	eng
Schlagworte:	Cations, Divalent - chemistry Chromones Crown ether ligand Crown Ethers - chemistry Crystalline colloidal array Crystallization Hydrogel ionic strength Lead - chemistry Osmolar Concentration phase transition Photochemistry Solutions Wavelength diffracted
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Zusammenfassung:	We quantitatively modeled the volume phase transition of a hydrogel containing a crystalline colloidal array with a crown ether ligand which binds Pb²⁺. The hydrogel volume response and the wavelength diffracted depend on the Pb²⁺ concentration and on both the ionic strength and the valence of the nonbinding ionic species. We successfully modeled the response of this hydrogel Pb²⁺ sensor to ionic strength and the cation valence of the added salts.
ISSN:	1618-2642 1618-2650
DOI:	10.1007/s00216-006-1088-8