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Efficient Fluorescence Quenching of tert-butyl substituted Phthalocyanines with Picric Acid

  • Gupta, Ankush (Department of Organic Material and Polymer Engineering, Dong-A University) ;
  • Kim, Meena (Department of Organic Material and Polymer Engineering, Dong-A University) ;
  • Park, Jong S. (Department of Organic Material and Polymer Engineering, Dong-A University)
  • Received : 2014.10.10
  • Accepted : 2014.12.18
  • Published : 2014.12.27

Abstract

Two tert-butyl substituted phthalocyanines(Pcs), in metal-free and metallated forms, were synthesized and the fluorescence responses toward various nitro derivatives, including picric acid(PA), 2,4-dinitrotoluene(DNT), 1,4-dinitrobenzene(DNB), 4-nitrotoluene(NT), nitrobenzene(NB), 1,4-benzoquinone(BQ), and nitromethane(NM) were investigated. Among the various nitro derivatives, current Pc derivatives exhibited efficient and exclusive fluorescence quenching in the presence of picric acid, which was readily observed by a naked eye. Quenching efficiency was estimated by the Stern-Volmer relationship, in which quenching constant, KSV, was calculated to be in the range of $10^4M^{-1}$. It was also found out that the aggregational behaviors of these Pcs are heavily dependent on the nature of solvent systems, subsequently affecting the quenching efficiency.

Keywords

References

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