Synthesis and nonlinear optical properties of a novel indium phthalocyanine highly branched polymer

Due to the well-known optical limiting properties of indium (III) phthalocyanines (In [III] Pcs) and aiming at extending their conjugation system, a highly branched indium phthalocyanine polymer was prepared. Flash chromatography was used for obtaining a pure polymer of polydispersity index near to the unity. The structure of the prepared polymer was determined using different spectroscopic techniques. Optical limiting and open aperture Z-scan measurements were carried out according standard procedures. Compared with many other phthalocyanines, the prepared indium-phthalocyanine polymer shows a high optical limiting performance that is indicated by a relatively low limiting threshold of 430mJcm(-2) and a large nonlinear absorption coefficient ((2)=3.4x10(-8)cmW(-1)). Copyright (c) 2015 John Wiley & Sons, Ltd.