A tryptophan responsive fluorescent and wettable dual-signal switch
作者:Xiaoyan Zhang、Jing Li、Ningmei Feng、Li Luo、Zhen Dai、Li Yang、Demei Tian、Haibing Li
DOI:10.1039/c4ob00792a
日期:——
A newfluorescent dianthracene calix[4]arene (C4DA) was designed and synthesized via coupling the fluorescent anthracene units and calix[4]arene units. Then it was used to form self-assembled monolayers (C4DA-SAMs) by the simple click reaction to give the first fluorescent and wettable dual-signal switch for tryptophan (Trp) on a micro- and nano-structured silicon surface. The switch for Trp on the
Triazole-Linked Anthracenyl-Appended Calix[4]arene Conjugate As Receptor for Co(II): Synthesis, Spectroscopy, Microscopy, and Computational Studies
作者:V. V. Sreenivasu Mummidivarapu、Vijaya Kumar Hinge、Khatija Tabbasum、Rajesh G. Gonnade、Chebrolu P. Rao
DOI:10.1021/jo400038x
日期:2013.4.19
A new triazole-linked anthracenyl-appended calix[4]arene-1,3-diconjugate (L) has been synthesized and characterized, and its single crystal XRD structure has been established. Binding properties of L toward different biologically relevant metal ions have been studied by fluorescence and absorption spectroscopy in ethanol. L exhibits selective recognition of Co2+ and can detect down to a concentration of 55 ppb (0.92 mu M). The roles of the calix[4]arene platform as well as the preorganized binding core in L's selective recognition have been demonstrated by studying appropriate control molecules. The mode of binding of L with Co2+ has been modeled both by DFT and MD computational calculations. L and its Co2+ complex could be differentiated on the basis of the nanostructural features observed in AFM and TEM.