Sahu Mamta, Ganguly Mainak, Sharma Priyanka
Department of Chemistry, Solar Energy Conversion and Nanomaterials Laboratory, Manipal University Jaipur Dehmi Kalan Jaipur 303007 Rajasthan India
Nanoscale Adv. 2024 Jul 27;6(18):4545-66. doi: 10.1039/d4na00427b.
Salicylaldehyde (SD) and its derivatives are effective precursors for generating coinage metal (gold, silver, and copper) nanoparticles (NPs). These NPs have a variety of potential environmental applications, such as in water purification and sensing, and those arising from their antibacterial activity. The use of SD and its derivatives for synthesizing coinage NPs is attractive due to several factors. First, SD is a relatively inexpensive and readily available starting material. Second, the synthetic procedures are typically simple and can be carried out under mild conditions. Finally, the resulting NPs can be tailored to have specific properties, such as size, shape, and surface functionality, by varying the reaction conditions. In an alkaline solution, the phenolate form of SD was converted to its quinone form, while ionic coinage metal salts were converted to zero-valent nanoparticles. The capping produced quinone of coinage metal nanoparticles generated metal-enhanced fluorescence under suitable experimental conditions. The formation of iminic bonds during the formation of Schiff bases altered the properties (especially metal-enhanced fluorescence) and applications.
水杨醛（SD）及其衍生物是生成贵金属（金、银和铜）纳米颗粒（NPs）的有效前体。这些纳米颗粒具有多种潜在的环境应用，例如在水净化和传感方面，以及因其抗菌活性而产生的应用。由于几个因素，使用SD及其衍生物合成贵金属纳米颗粒很有吸引力。首先，SD是一种相对便宜且容易获得的起始原料。其次，合成过程通常很简单，可以在温和条件下进行。最后，通过改变反应条件，可以使所得的纳米颗粒具有特定的性质，如尺寸、形状和表面功能。在碱性溶液中，SD的酚盐形式转化为醌形式，而离子态的贵金属盐则转化为零价纳米颗粒。封端剂产生的贵金属纳米颗粒的醌在合适的实验条件下产生金属增强荧光。席夫碱形成过程中亚胺键的形成改变了性质（特别是金属增强荧光）和应用。
