The interaction of Hg<sup>2+</sup>and trivalent ions with two new fluorescein bio-inspired dual colorimetric/fluorimetric probes
作者:A. C. Gonçalves、V. Pilla、E. Oliveira、S. M. Santos、J. L. Capelo、A. A. Dos Santos、C. Lodeiro
DOI:10.1039/c6dt01180b
日期:——
units have been designed and synthesized via an ester linkage between a fluorescein ethyl ester and Boc-Ser(TBDMS)-OH or Boc-Cys(4-MeBzl)-OH, and their photophysical properties have been explored. The optical response of both compounds (2 and 3) towards the metal ions Na+, K+, Hg+, Ag+, Ca2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, Pb2+, Hg2+, Al3+, Fe3+, Ga3+and Cr3+ was investigated in pure acetonitrile and
通过荧光素乙酯与Boc-Ser(TBDMS)-OH或Boc-Cys(4-MeBzl)-OH之间的酯键,设计并合成了两种包含荧光素-氨基酸单元的新型发光化合物,它们的光物理性质具有被探索了。两种化合物(2和3)对金属离子Na +,K +,Hg +,Ag +,Ca 2 +,Co 2 +,Ni 2 +,Cu 2 +,Zn 2 +,Cd 2+的光学响应,Pb 2 +,Hg 2 +,Al 3+,Fe 3+在纯乙腈和乙腈/水混合物中研究了Ga 3+和Cr 3+。在两种溶剂中,所有三价金属和Hg 2+离子都观察到了很强的CHEF(螯合增强荧光)效应。采用紫外可见吸收,稳态和时间分辨发射光谱法。结果表明形成了具有Al 3+,Fe 3+,Ga 3+,Cr 3+和Hg 2+的单核络合物。为了获得关于Al 3+和Hg 2+与荧光素的配位几何学的原子洞察力,进行了使用密度泛函理论的理论计算。参见图3,其与在乔布斯