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 restricted C=N isomerization mechanism. Aluminum(III) can be detected in the presence of most of the competing
我们分别通过2-羟基萘醛与尿素和硫脲的缩合反应合成了萘醛-碳腙(NC)和萘醛-硫代碳腙(NTC)席夫碱配体。由于受限的 C=N 异构化机制,这两种希夫碱配体在铝 (III) 存在下都显示蓝色开启荧光。通过使用 NC 和 NTC,可以在大多数竞争金属离子存在的情况下检测铝 (III)。NC 和 NTC 在乙腈中对 Al3+ 的缔合常数 (log Ka) 分别计算为 14.5 和 14.1。