Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2014 / V.26,no.4,Dec Title Efficient Fluorescence Quenching of tert-butyl substituted Phthalocyanines with Picric Acid Authors Ankush Gupta, Meena Kim and Jong S. Park Institution/Affiliations Dong-A University Pages/Total page pp.277 ~ 282 / 6 Language English Abstract 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 104M-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 Keywords: phthalocyanine, aggregates, chemosensor, nitroaromatic compound, picric acid Download   Reference http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2014_v26n4_277