期刊
ADVANCED FUNCTIONAL MATERIALS
卷 22, 期 7, 页码 1417-1424出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201102309
关键词
fluorescent polyelectrolyte; nanostructure; self assembly; metal sensing; aluminum
类别
资金
- Ministry of Knowledge Economy (MKE)
- National Research Foundation (NRF)
- Korean government (MEST) through the Active Polymer Center for Pattern Integration (APCPI) [R11-2007-050-00000-0]
- Pioneer Research Center through the National Research Foundation of Korea
- Ministry of Education, Science and Technology [2011-0001672]
- Converging Research Center through the Ministry of Education, Science and Technology [2011K000631]
- National Research Foundation of Korea [2010-50193, 2010-0019459, 2007-0056502] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A highly fluorescent triazine-bridged polymer, poly[(diphenylamino-s-triazine)-co-(2-methoxy-5-propyloxysulfonate-1,4-phenylene vinylene)] (DTMSPV), is synthesized from Wittig polycondensation of a triazine monomer with a water-soluble p-phenylene vinylene monomer. The fluorescent amphiphilic polymer in aqueous solution self-assembled into nanoassemblies of micelle-like nanostructure (MS) and p stacking nanostructure (pS), which have average sizes of 93 to 270 nm, depending on the concentration of DTMSPV. The micelle-like nanostructure of DTMSPV (MS) shows blue emission at 457 and 488 nm with a high emission quantum yield (FE) of 31% in aqueous solution. On the other hand, the FE of p stacking structures (pS), formed in a highly concentrated solution, is lower than the MS. The MS exhibits fluorescence quenching as well as color change from blue to green/yellow, depending on the kinds of metal ions. The metal ion sensitivity is larger in the order of the main group ions (Na+, K+) < dicationic transition metal ions (Zn2+, Cd2+, Pb2+, Cu2+, Pd2+) < trivalent transition metal ions (Fe3+, Ru3+), with an exception of Al3+. In particular, the fluorescence of MS is dramatically quenched with color change to yellow in response to Al3+ concentrations. The selectivity and sensitivity of MS to Al3+ are unusually high even in the presence of competitive metal ions, which can be attributed to the specific interaction of triazine units with Al3+.
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