Synthesis and optical characterization of new ketocyanine dyes with extended polymethine chaines |
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| Authors: | Sergey Miltsov Julian Alonso-Chamarro Mar Puyol |
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| Institution: | 1. Institute of Macromolecular Compounds, Russian Academy of Sciences, St. Petersburg, Russia;2. Grup de Sensors i Biosensors, Unitat de Quimica Analítica, Facultat de Ciències, Universitat Autònoma de Barcelona, Bellaterra, Spain |
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| Abstract: | New symmetrical and unsymmetrical near-infrared absorbing ketocyanine-type dyes are synthesized and their optical characterization is done. The relationships between their structure and optical properties are discussed. The synthesized ketocyanine dyes show a positive solvatochromism and are poorly fluorescent. A new procedure for the preparation of N,N,N′,N′-tetramethylvinamidinium perchlorate, which was a very useful reagent for the synthesis of various heterocyclic compounds as well as for the preparation of cyanine dyes is developed. |
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