Yamada H, Kojo M, Nakahara T, Murakami K, Kakima T, Ichiba H, Yajima T, Fukushima T. Development of a fluorescent chelating ligand for scandium ion having a Schiff base moiety.
SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012;
90:72-77. [PMID:
22316617 DOI:
10.1016/j.saa.2012.01.014]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 01/05/2012] [Accepted: 01/08/2012] [Indexed: 05/31/2023]
Abstract
A fluorescent ligand, 1-(2-hydroxy-3-methoxybenzaldehyde)-4-aminosalicylhydrazone (HMB-ASH), was newly designed and synthesized, and its fluorescence characteristics for metal ions were investigated in the pH range 3.0-10.5 (at a difference of 0.5 for each metal). After testing 31 different metal ions, it was found that HMB-ASH was able to emit fluorescence intensely at 512 nm with an excitation wavelength of 353 nm in the presence of Sc(3+), one of the rare earth metals, at pH values around 3.5 and 8.0. The other metal ions hardly showed fluorescence with HMB-ASH. The fluorescence was more intense at pH 8.0, and the detection limit of Sc(3+) in a buffer solution (pH 8.0) was approximately 18.8 nmol L(-1) (0.85 ppb).
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