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Interfacial Synthesis and Functionality of Self‐Stabilized Polydiaminonaphthalene Nanoparticles
Author(s) -
Li XinGui,
Zhang JiaLi,
Huang MeiRong
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201200860
Subject(s) - miniemulsion , polymerization , nanoparticle , materials science , polymer , fluorescence , nanotechnology , chemical engineering , composite material , physics , quantum mechanics , engineering
Abstract 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 n M .