杯[4]芳烃的 1,3-二酰胺基喹啉衍生物（L）作为比率和比色传感器用于 Zn2+：光谱，显微镜和计算研究。

1,3-Di-amidoquinoline conjugate of calix[4]arene (L) as a ratiometric and colorimetric sensor for Zn2+: spectroscopy, microscopy and computational studies.

机构信息

Bioinorganic Laboratory, Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400 076, India.

出版信息

Dalton Trans. 2012 Feb 14;41(6):1671-4. doi: 10.1039/c2dt11900e. Epub 2011 Dec 20.

DOI:10.1039/c2dt11900e

Abstract

Carboxamidoquinoline appended calix[4]arene-1,3-di-conjugate (L) has been synthesized and characterized and its single crystal XRD structure has been established. L has been shown to act as selective ratiometric turn-on fluorescence sensor for Zn(2+) up to a lowest concentration of 183 ± 18 ppb (2.82 μM) with a nine-fold enhancement by exhibiting blue-green emission. The coordination features of the species of recognition have been computationally evaluated by DFT methods and found to have distorted tetrahedral Zn(2+) center in an N(4) core. The spherical nano-structural features observed for L in TEM are being transformed into the Koosh nano-flower like structure when complexed with Zn(2+) and hence these two can be easily differentiated. Even the features observed in AFM can distinctly differentiate L from its Zn(2+) complex.

摘要

已合成并表征了带有羧酰胺基喹啉的杯[4]芳烃-1,3-二共轭物（L），并建立了其单晶 X 射线衍射结构。L 被证明是一种选择性的比率型荧光传感器，可用于检测 Zn(2+)，最低浓度可达 183 ± 18 ppb（2.82 μM），荧光增强了九倍，呈现蓝绿色发射。通过 DFT 方法计算了识别物种的配位特征，发现 Zn(2+)中心在 N(4)核中具有扭曲的四面体结构。在 TEM 中观察到的 L 的球形纳米结构特征在与 Zn(2+)配位时转变为 Koosh 纳米花状结构，因此两者很容易区分。即使在 AFM 中观察到的特征也可以明显地区分 L 和其 Zn(2+)配合物。