ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
From a Tb3+ chelated compound to a hybrid material: selective emission responses to anions
Zheng-Yang Zhang, Qian-Ming Wang, Jian-Zhong Wu, Wei-Sheng Cai, and Yi-Fei Yu
School of Chemistry and Environment, South China Normal University, Guangzhou, 510006 China
Abstract: A novel terbium 2-hydroxymethyl-benzoimidazole-6-carboxylic acid complex has been designed and unique emission changes to
fluoride anions in comparison with HSO4−, AcO−, Cl−, Br−, and I− were observed. Then, the complex was encapsulated into an inorganic matrix. The novel hybrid material, with strong green
emission was successfully synthesized as an anions receptor in water. More importantly, this hybrid material not only gave
luminescence response to F−, but also to HSO4−. Spectroscopic studies demonstrated that the recognition process for fluoride ions can be mainly ascribed to its hydrogen
bonding interactions with hydrogen bond donor units (NH and OH). In case of hydrogen sulfate, the sensing effects can be probably
attributed to its acidity instead of hydrogen bonding interactions.
Keywords: sensor – luminescent – terbium – fluoride – hydrogen sulfate
Full paper is available at www.springerlink.com.
Chemical Papers 66 (3) 221–225 (2012)