Synthesis and electrostatic nano-assembly of water-soluble polybenzothiadiazole derivatives with long-wavelength emission in the solid states.
We have synthesized APBT and APTBT containing benzothiadiazole units by Suzuki cross-coupling reaction with good yield. The polymers showed blue emission colors in aqueous solutions, while long wavelength shift was observed in the solid state due to facilitated exciton migration. APBT and APTBT are water-soluble and highly-fluorescent conjugated polymers with negatively charged sulfonate side chains and thus they can be electrostatically assembled with oppositely charged polyelectrolyte such as cationic polymer, poly(dimethyldiallylammonium chloride) (PDAC) via layer-by-layer (LbL) deposition technique on a glass slide. According to the increased the number of bilayer, we found that the assembled film exhibited larger enhancement of the long wavelength emission relative to the blue emission, due to the increased excition migration.
Organic and Optoelectronic Materials Laboratory, Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon 305-764, Korea.
Jung Hyo
JH
Lee
Dai Geun
DG
Kim
Geun Seok
GS
Jang
Won Seok
WS
Lyoo
Won Ho
WH
Park
Minjung
M
Lee
Taek Seung
TS
Lee
D055664:Electrochemical Techniques; D058726:Nanoconjugates / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D011095:Polyethylenes / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013830:Thiadiazoles / Q000737:chemistry*; D013844:Thiazoles / Q000737:chemistry
D058726:Nanoconjugates; D011095:Polyethylenes; D011108:Polymers; D000644:Quaternary Ammonium Compounds; D013830:Thiadiazoles; D013844:Thiazoles; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride; C015700:benzo-1,2,3-thiadiazole; C078412:6-amino-2-n-pentylthiobenzothiazole