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Fluorescent Streptocyanine Dyes: Synthesis and Photophysical Properties – Synthesis of a New Hemicarboxonium Salt
Author(s) -
Guieu Valérie,
Izquierdo Albert,
GarciaAlonso Sonia,
André Chantal,
Madaule Yves,
Payrastre Corinne
Publication year - 2007
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.200600522
Subject(s) - chemistry , fluorescence , salt (chemistry) , photochemistry , chain (unit) , combinatorial chemistry , organic chemistry , quantum mechanics , physics , astronomy
Seven new nonacarbon chain carboxonium salts were synthesized from variously substituted arylethanones, except a few which were too deactivated to react. By the action of several amines, thirteen new nonacarbon chain streptocyanine dyes were synthesized. Photophysical properties of these new dyes were evaluated to highlight that they all absorb around 700 nm and emit fluorescence above 720 nm. As the purity of the intermediary carboxonium salt was improved (up to 98 %), a new nonacarbon chain hemicarboxonium salt was synthesized and fully characterized by X‐ray crystallography.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)