Lead ions selective fluorescent probe

ORGN 443

Maozhong Tian, tmzhong2002@yahoo.com.cn, Xiaojun Peng, pengxj@dlut.edu.cn, Jiangli Fan, fanjl@dlut.edu.cn, and Shiguo Sun, shiguo@dlut.edu.cn. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, China
A new fluorescent probe (BPb1) for Pb2+ has been synthesized, where diethanolamine (receptor) is linked with 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) (fluorophore) via a methylene group (spacer). The absorption (496 nm) and emission (505 nm) wavelengths are in visible range. The fluorescence quantum yields of the lead-free and lead-bound states of BPb1 in acetonitrile are 0.013 and 0.693, respectively. The large chelation enhanced fluorescence (53-fold) effect with Pb2+ can be explained by the blocking of the photoinduced electron transfer (PET) process.

 

Heterocycles and Aromatics, Molecular Recognition and Self Assembly
8:00 PM-10:00 PM, Tuesday, April 8, 2008 Morial Convention Center -- Hall A, Poster

Division of Organic Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008