期刊
DALTON TRANSACTIONS
卷 40, 期 18, 页码 5018-5025出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1dt10033e
关键词
-
资金
- National Science Council of Taiwan [NSC 98-2627-M-009-009, NSC 97-2113-M-009-016-MY3]
In this study, we have developed two new L-tryptophan based contrast agents [Gd(Try-TTDA)(H2O)](2-) and [Gd(Try-ac-DOTA)(H2O)](-). Upon addition of Cu(II) to [Gd(Try-TTDA)(H2O)](2-), significant increases in the relaxivity (r(1)) and hydration number of [Gd(Try-TTDA)(H2O)](2-) were observed. However, it only induced a minute increase in the relaxivity (r(1)) in the case of [Gd(Try-ac-DOTA)(H2O)](-). Furthermore, the interaction of Cu(II) with the indole ring of Gd(III) complexes was explored by measuring the intrinsic fluorescence of the tryptophan of the Gd(III) complex. With the addition of one equivalent of Cu(II) to [Gd(Try-TTDA)(H2O)](2) the indole fluorescence was completely quenched. Moreover, the [Gd(Try-TTDA)(H2O)](2-) complex shows excellent selectivity towards Cu(II) over other metal ions (Cu(II) > La(III) > Mg(II)). Importantly, the significant signal intensity (2073 +/- 67) for in vitro MR imaging using [Gd(Try-TTDA)(H2O)](2-) in the presence of Cu(II) implicates that this new smart contrast agent ([Gd(Try-TTDA)(H2O)](2-)) can serve as a Cu(II) sensor for MR imaging.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据