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Proceedings of the 17th IAPRI World Conference on Packaging (IAPRI 2010 E-BOOK)

Tianjin,China,10.12-10.15，2010

ISBN: 978-1-935068-36-5 Scientific Research Publishing, USA

E-Book 886pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $80

Title: Red fluorescent Organic Nanoparticles Based on Donor-Acceptor Naphthylamino Fumaronitrile
Source: Proceedings of the 17th IAPRI World Conference on Packaging (IAPRI 2010 E-BOOK) (pp 282-285)
Author(s): Wenguan Zhang, Lab of Printing & Packaging Material and Technology-Beijing Area Major Laboratory, Beijing Institute of Graphic Communication.Beijing 102600, P. R. China.
Lian Qin, Lab of Printing & Packaging Material and Technology-Beijing Area Major Laboratory, Beijing Institute of Graphic Communication.Beijing 102600, P. R. China.
Shengmin Zhao, Lab of Printing & Packaging Material and Technology-Beijing Area Major Laboratory, Beijing Institute of Graphic Communication.Beijing 102600, P. R. China.
Abstract: Red fluorescence was an indispensable component in many applications such as full color organic light-emitting display and anti-counterfeit technology. Usually red fluorescent molecules were prone to aggregation and crystallization in solid state, which resulted in fluorescent quenching. A novel red fluorescent pigment bis(4-(N-(2-naphthyl)phenylamino)phenyl)fumaronitrile (2-NPAFN) was synthesized. Donoracceptor compound with nonplanar naphthylamino group and fumaronitrile core had a pair of antiparallel dipoles suppressing fluorescence quenching considerably and showed strong red photoluminescence which centralized at 649 nm in solid film. The decomposition temperature of 2-NPAFN was observed at around 428 oC, which showed high thermal stability. The positive and then negative solvatochromic shifts appeared in the absorption and emission spectra of 2-NPAFN in different polarity of solvents. The dimensions of fluorescent organic nanoparticles (FONs) from 2-NPAFN in water/ tetrahydrofuran (v/v, 9:1) were small size section in the range of 122-396 nm or big size section of 164-458 nm. With the increasing amount of red pigment 2- NPAFN, the particle size and fluorescent intensity rose at the same ratio of water/ tetrahydrofuran to a certain extent. The strong emission of FONs peaked at 649 nm and was much higher than that of 2-NPAFN in solution. FONs of 2-NPAFN with donor-acceptor character and high emission had potential applications in nanosized fluorescence and optoelectronic devices.
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