Unimolecular binary half-adders with orthogonal chemical inputs
作者:Lu Zhang、Wesley A. Whitfield、Lei Zhu
DOI:10.1039/b719644j
日期:——
Unimolecular half-adders based upon an arylvinyl-bipyridyl fluorophore platform were demonstrated where all the chemical input combinations were fully processed by half-adder molecules to generate the arithmetic results of the entire truth table.
Electronic structural dependence of the photophysical properties of fluorescent heteroditopic ligands – implications in designing molecular fluorescent indicators
作者:Ali H. Younes、Lu Zhang、Ronald J. Clark、Michael W. Davidson、Lei Zhu
DOI:10.1039/c0ob00482k
日期:——
Two fluorescentheteroditopic ligands (2a and 2b) for zincion were synthesized and studied. The efficiencies of two photophysical processes, intramolecular charge transfer (ICT) and photoinduced electron transfer (PET), determine the magnitudes of emission bathochromic shift and enhancement, respectively, when a heteroditopic ligand forms mono- or dizinc complexes. The electron-rich 2b is characterized
合成并研究了锌离子的两种荧光异双位配体(2a和2b)。当异双位配体形成单或二锌复合体。富电子2b的特点是在激发态具有高度的 ICT,对 PET 的倾向很小,这表现为发射的大红移锌2+配位而不增加荧光量子产率。缺乏电子的2a显示出相反的光物理结果,其中锌2+结合导致发射大大增强而没有显着的光谱偏移。电子结构对2a和2b中 ICT 和 PET 相对效率的影响以及锌2+- 使用实验和计算方法探测协调。这项研究表明,在异源配体中设计的各种光物理途径(例如ICT 和 PET)之间的微妙平衡敏感地依赖于配体的电子结构,即荧光团是富电子还是贫电子,它是否拥有供体——受体类型的结构,以及发生金属结合的位置。
Photochemically Stable Fluorescent Heteroditopic Ligands for Zinc Ion
作者:Lu Zhang、Lei Zhu
DOI:10.1021/jo8015083
日期:2008.11.7
Photochemically stable fluorescentheteroditopic ligands (9 and 10) for zincion were prepared and studied. Two independent metal coordination-driven photophysical processes, chelation-enhanced fluorescence (CHEF) and internal (or intramolecular) charge transfer (ICT), were designed into our heteroditopic ligand framework. This strategy successfully relates three coordination states of a ligand, non-
A Heteroditopic Fluoroionophoric Platform for Constructing Fluorescent Probes with Large Dynamic Ranges for Zinc Ions
作者:Lu Zhang、Ronald J. Clark、Lei Zhu
DOI:10.1002/chem.200701419
日期:2008.3.17
A heteroditopicfluoroionophoricplatform has been designed for constructingfluorescentprobes for zincions over large concentration ranges. The responses of the prototype probes 3a and 3b to zincions were shown to be consistent with our hypothesis, according to which the modulation of photoinduced electron transfer followed by conformation rigidification or enhanced internal charge transfer of
Enhancing the Photostability of Arylvinylenebipyridyl Compounds as Fluorescent Indicators for Intracellular Zinc(II) Ions
作者:Zhao Yuan、Ali H. Younes、John R. Allen、Michael W. Davidson、Lei Zhu
DOI:10.1021/acs.joc.5b00503
日期:2015.6.5
bright, zinc(II)-sensitive fluoroionophores. The applicability of AVBs as fluorescentindicators for imaging cellular zinc(II), however, is limited by low photostability, partially attributable to the photoisomerization of the vinylene functionality. Two configurationally immobilized (i.e., “locked”) AVB analogues are prepared in this work. The zinc(II)-sensitive photophysical properties and zinc(II) affinities