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

John Kunzler | Zendy; Leen Samha | Zendy; Renwu Zhang | Zendy; Hussein Samha | Zendy

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

Author(s) -

John Kunzler,

Leen Samha,

Renwu Zhang,

Hussein Samha

Publication year - 2011

Publication title -

american journal of undergraduate research

Language(s) - English

Resource type - Journals

eISSN - 2375-8732

pISSN - 1536-4585

DOI - 10.33697/ajur.2011.003

Subject(s) - cyanine , dimer , monomer , aqueous solution , j aggregate , photochemistry , chemistry , absorption (acoustics) , quenching (fluorescence) , triethylamine , absorption spectroscopy , analytical chemistry (journal) , fluorescence , molecule , materials science , chromatography , organic chemistry , optics , polymer , physics , composite material

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 Haggregates was very weak due to self quenching.

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