Interfacial synthesis and functionality of self-stabilized polydiaminonaphthalene nanoparticles.
A simple and effective template-free synthesis method for nanosized conducting polymers with self-stability and functionality is a main challenge. Herein, a strategy is reported for the facile synthesis of poly(1,5-diaminonaphthalene) nanospherical particles by an interfacial miniemulsion oxidative polymerization of 1,5-diaminonaphthalene at mobile microinterfaces between a stirred biphase without external emulsifiers. The size of the nanospheres was carefully optimized by controlling the polymerization conditions. Formation and self-stabilization mechanisms of the nanoparticles are proposed. The constantly movable and refreshed microinterface is a key to successful synthesis of the nanospheres, for significantly suppressing secondary growth leading to agglomerated particles because vigorous stirring makes as-formed self-stabilized nanospheres instantly leave the microinterfaces. The resulting nanospheres possess several advantages: clean surface, self-stability, redispersibility, semiconductivity, electroactivity, and fluorescence emission. The fluorescence emission can be quenched by specific quenchers, thus enabling low-cost, high-performance chemosensors to be obtained for the sensitive detection of Zn(II) ions in a wide linear concentration range of more than five orders of magnitude with a superior detection limit down to 1 nM.
Institute of Materials Chemistry, Key Laboratory of Advanced Civil Engineering Materials of the Ministry of Education, College of Materials Science and Engineering, Tongji University, 1239 Si-Ping Road, Shanghai 200092, PR China.
Xin-Gui
XG
Li
Jia-Li
JL
Zhang
Mei-Rong
MR
Huang
D015081:2-Naphthylamine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D004553:Electric Conductivity; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry; D010316:Particle Size; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D015032:Zinc / Q000737:chemistry*
D011108:Polymers; C510889:1,5-diaminonaphthalene; D015081:2-Naphthylamine; D015032:Zinc