Department of Chemistry, Indian Institute of Technology, Kharagpur, Kharagpur, West Bengal, India.
Chemistry. 2012 Dec 3;18(49):15845-55. doi: 10.1002/chem.201201242. Epub 2012 Oct 12.
The condensation products of salicylaldehyde and different diamines constitute an important class of diiminic Schiff bases (DSBs). This class of compounds has been rediscovered as reducing as well as capping agents under UV irradiation. UV irradiation of alkaline DSB solutions in the presence of water-soluble copper salts has been employed to produce copper nanoparticles (CuNPs). Intriguing CuNP-stimulated fluorescence behavior of the solution has been observed. Depending upon the nature of the spacer in between two iminic bonds, fluorescence enhancement or quenching is observed. Such surprising fluorescence contrast has been ascribed to far-field radiation and lossy surface waves.
水杨醛与不同二胺的缩合产物构成了一类重要的二亚胺席夫碱（DSB）。在紫外光照射下，这类化合物重新被发现具有还原和封端作用。在碱性 DSB 溶液中加入水溶性铜盐并进行紫外光照射，可生成铜纳米颗粒（CuNPs）。人们观察到溶液中 CuNP 刺激的荧光行为非常有趣。根据两个亚胺键之间的间隔基的性质，观察到荧光增强或猝灭。这种令人惊讶的荧光对比归因于远场辐射和损耗表面波。
