Naphthaldehyde–Urea/Thiourea Conjugates as Turn‐On Fluorescent Probes for Al
<sup>3+</sup>
Based on Restricted C=N Isomerization
作者:Debabrata Maity、T. Govindaraju
DOI:10.1002/ejic.201100772
日期:2011.12
naphthaldehyde–carbonohydrazone (NC) and naphthaldehyde–thiocarbonohydrazone (NTC) Schiff base ligands by the condensation reaction of 2-hydroxy naphthaldehyde with urea and thiourea, respectively. Both these Schiff base ligands show blue turn-on fluorescence in the presence of aluminum(III), as a result of a restrictedC=Nisomerization mechanism. Aluminum(III) can be detected in the presence of most of the competing
Three-input–three-output logic operations based on absorption and fluorescence dual-mode from a thiourea compound
作者:Lianlian Wang、Bin Li、Liming Zhang、Yongshi Luo
DOI:10.1039/c2dt31808c
日期:——
A simple organic molecule of 2-naphthol-1-aldehyde-conjugated thiourea (denoted as receptor 1) is designed and prepared. Absorption and fluorescence spectra response profiles of receptor 1 with different ionic inputs vary significantly in a DMSOâH2O solution (V/V = 9â:â1) through modulating intramolecular charge transfer (ICT) processes. In particular, the changes of the dual-modal spectra when anions, such as Fâ, AcOâ or H2PO4â, are introduced in such an aqueous solution indicate that receptor 1 could be tolerant to H2O at least to some extent in recognizing anions. On the basis of the above results, binary logic operations (OR, NOR and INHIBIT) and their multiply-logic functions with different combinations have been achieved at the molecular level by changing different chemical inputs. The output signals can be encoded as absorption and fluorescence dual-mode, depending on the choice of 2-naphthol as the chromophore and fluorophore core.