Investigation of the Effect of Concentration on Molecular Aggregation of Cyanine Dyes in Aqueous Solution

Autor:	Hussein Samha, Renwu Zhang, John Kunzler, Leen Samha
Rok vydání:	2011
Předmět:	chemistry.chemical_compound Aqueous solution Quenching (fluorescence) Monomer chemistry Dimer General Medicine Emission spectrum Cyanine Absorption (chemistry) Photochemistry Triethylamine
Zdroj:	Volume 9, Issue 4. 9
ISSN:	2375-8732 1536-4585
DOI:	10.33697/ajur.2011.003
Popis:	The aggregation of the cyanine dye, 3,3’-disulfobutyl-5,5’-dichloro thiacarbocyanine triethylamine, (NK-3796) in aqueous solution was investigated using absorption and emission spectroscopy. The equilibrium, n(monomer) ⇆ n(dimer) ⇆ (H-aggregate)n , was observed over a series of dye concentrations ranging from 10-4 mM to 0.1mM. At concentrations 10-1 mM). Monomers and dimers exhibit strong emission in the visible region. Also notable, is that the emission from the H-aggregates was very weak due to self quenching.
Databáze:	OpenAIRE
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