A near-infrared fluorescent chemodosimeter for silver(I) ion based on an expanded porphyrin

✍ Scribed by Xunjin Zhu; Shitao Fu; Wai-Kwok Wong; Wai-Yeung Wong

• Book ID: 104094977
• Publisher: Elsevier Science
• Year: 2008
• Tongue: French
• Weight: 395 KB
• Volume: 49
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/j.tetlet.2008.01.037

✦ Synopsis

An expanded porphyrin [26]hexaphyrin(1.1.1.1.1.1) was exploited as a fluorescent chemodosimeter for Ag + ions with high sensitivity and selectivity via near-infrared luminescence above 900 nm, a region that is free from optical interference in the visible wavelength range induced by the commonly used matrix and other organic compounds. The association constant for the Ag + -porphyrin complexation was evaluated by spectroscopic titration method to be 7.24 Â 10 10 M À1 .