An artificial siderophore for the detection of iron(III)

被引:41
作者
Wallace, KJ [1 ]
Gray, M [1 ]
Zhong, ZL [1 ]
Lynch, VM [1 ]
Anslyn, EV [1 ]
机构
[1] Univ Texas, Dept Chem & Biochem, Austin, TX 78712 USA
基金
英国惠康基金;
关键词
D O I
10.1039/b504496k
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
An artificial siderophore in the form of a squaraine dye (1) has been synthesized. The bidentate ligand chelates to Fe(III) between the deprotonated hydroxyl group on the ortho position of the ring adjacent to the carbonyl group of the cyclobutadiene ring. The optical response is due to a subtle geometry change of 1 on chelation to Fe(III). This artificial siderophore forms a 2 : 1 ligand : metal complex, as indicated by a sigmoidal isotherm (K-a = 10(7) M-1). The optical response on the addition of Fe( III) is observed at low concentrations in comparison to other metal salts. The X-ray crystal structure and calculated structures of dye (1) are also included, and will be discussed.
引用
收藏
页码:2436 / 2441
页数:6
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