Triazole functionalized gold nanoparticles for colorimetric Cr³⁺ sensing

详细信息    查看全文

• 作者：Yu-Ching Chen ; I-Lin Lee ; Yi-Ming Sung ; Shu-Pao Wu
• 关键词：Colorimetric sensor ; Cr3+ ; Gold nanoparticles ; Triazole
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：188
• 期：Complete
• 页码：354-359
• 全文大小：2421 K

文摘

Triazole functionalized gold nanoparticles (NTP@AuNPs) were synthesized through a click reaction and have been developed for sensitive and selective colorimetric Cr³⁺ detection. Gold nanoparticles were prepared by reducing HAuCl₄ with sodium citrate and then using 4-(prop-2-ynyloxy)pyridine (PP) as the capping agent. The acetylene part of PP and the azide part of 1-(azidomethyl)-4-nitrobenzene were combined to form a triazole structure through a click reaction. Aggregation of NTP@AuNPs was induced immediately in the presence of Cr³⁺ ions, yielding a color change from red to purple. This Cr³⁺-induced aggregation of NTP@AuNPs was first monitored using the naked eye and then UV-vis spectroscopy with a detection limit of 1.4 ¦ÌM. In addition, NTP@AuNPs were also used to detect Cr³⁺ in lake water samples, with low interference.