Título del libro: Sonochemistry: Source Of Clean Energy
Título del capítulo: Ultrasound-assisted Chemical Synthesis
GUADALUPE GABRIEL FLORES ROJAS; FELIPE LOPEZ SAUCEDO; RICARDO VERA GRAZIANO; EMILIO BUCIO CARRILLO;
Autores externos:
Idioma:
Año de publicación:
2024
Resumen:
Currently, there are various reports where ultrasound equipment has been applied in chemical synthesis covering different areas of chemistry such as organic, organometallic, inorganic, polymers, material engineering, and catalysis (Cravotto and Cintas 2006, Li et al. 2021, Pokhrel et al. 2016, Zhang et al. 2009). In this regard, the catalog of sonochemistry in synthesis has grown in recent years more than other traditional energy sources. This increment in the interest for sonochemistry, has also benefited from and for the technological advances in ultrasound equipment. In general terms the idea of synthesis using this approach also carries with additional benefits such as efficiency of processes, and in case of materials the possibility to get a specific size or morphology, which is of interest for technological development. In the annals of sonochemistry it is found the reaction reported by Fry, who carried out the electrochemical reduction of a,a?dibromoketones to a mixture of acetoxyketones, employing a dispersion of Hg(l) in acetic acid (Fry and Bujanauskas 1978, Montaña and Grima 2003). Derivative from this research, a considerable number of publications on similar chemical synthesis of molecules using ultrasound as energy source become more relevant (Mason 1986). Inside laboratory, a power range of ultrasound applied in the chemical synthesis is usually above 20 kHz, energy which is enough to activate chemical species, that with the help of other reaction conditions such as light, heat, and pressure, can allow reactions that would be impossible without the use of ultrasound (Saleh et al. 2017). The principle of ultrasound is to generate the cavitation process, formed in the rarefaction cycles of ultrasonic waves when the structure of the liquid breaks into microbubbles that subsequently collapse in compression cycles, producing this way high pressures in the order of 10,000 atm and high temperatures in the order of 5,000 K (Fragoso-Medina et al. 2021, Penteado et al. 2018). © 2024 Felipe López-Saucedo, Amira Jalil Fragoso-Medina, and Emilio Bucio.
Entidades citadas de la UNAM:
ISBN:
9781040117613
Editorial:
CRC Press Nombre de la publicación:
Ultrasound-assisted Chemical Synthesis
Página inicial:
45
Página final:
60
