Structurally Characterized Antipyrine‐Based Dual Fluorescent Probe: Enhanced Al III Selectivity of a Dinuclear Zn II Complex for Intracellular Sensing by a Displacement Approach

Autor:	Sisir Lohar, Archya Sengupta, Debasis Das, Jesús Sanmartín Matalobos, Ansuman Chattopadhyay
Rok vydání:	2014
Předmět:	Inorganic Chemistry Detection limit chemistry.chemical_compound Aqueous solution Ethanol chemistry Metal ions in aqueous solution Inorganic chemistry Alkali metal Selectivity Fluorescence Intracellular
Zdroj:	European Journal of Inorganic Chemistry. 2014:5675-5682
ISSN:	1099-0682 1434-1948
DOI:	10.1002/ejic.201402702
Popis:	The antipyrine-based fluorescence probe daph, structurally characterized by single-crystal X-ray diffraction, can recognize both Zn2+ (at 520 nm, yellow) and Al3+ (at 490 nm, green). However, Al3+ selectivity is enhanced significantly when the dinuclear ZnII-daph complex is used as a sensor, which senses Al3+ by a displacement approach. The binding constants of daph for Zn2+ and Al3+ are (4.9 ± 0.2) × 104 and (3 ± 0.1) × 105 M–1, respectively. The higher water solubility of the ZnII-daph complex allows the detection of Al3+ in a greener way (0.1 M HEPES buffer, ethanol/water = 1:9, v/v, pH 7.4). Moreover, the detection limit of the ZnII-daph complex for Al3+ is higher (2.5 × 10–9 M) than that of free daph (4.6 × 10–8 M). Alkali and alkaline-earth metal ions, Cd2+, Hg2+, and Pb2+, and 3d metal ions do not interfere. Both daph and the ZnII-daph complex are capable of intracellular Al3+ detection.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bfb6f951cbe0bc9ba2a39e7a373c9087 https://doi.org/10.1002/ejic.201402702 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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