J-Aggregates of Indoheptamethine Cyanine Dye
| Autor: | E. V. Manulik, A. D. Nekrasov, B. I. Shapiro |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Exciton General Engineering Salt (chemistry) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Ring (chemistry) Photochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Molecule General Materials Science Absorption (chemistry) Cyanine 0210 nano-technology J-aggregate |
| Zdroj: | Nanotechnologies in Russia. 13:103-108 |
| ISSN: | 1995-0799 1995-0780 |
| DOI: | 10.1134/s199507801802012x |
| Popis: | The effect of doubly charged inorganic and organic cations on the aggregation of anionic indoheptamethine cyanine dyes has been studied in aqueous solutions. It is shown that the effective formation of J-aggregates with narrow exciton absorption bands in the IR region of the spectrum with λmax = 920 nm is characteristic only of a dye with SO 3 - groups in the 6,6′-positions of the benzoindolenine ring. It is found that bis-quaternary salt based on α-picolinium is particularly effective as a J-aggregating agent and causes J-aggregation at a concentration close to the dye concentration. It follows that the introduction of sulfogroups at the 6,6′-positions of the benzoindolenine ring creates optimal conditions for packing the molecules of the indolenine dye into a highly organized structure of a “brickwork” type under the action of multiply charged cations. It is shown that the J-aggregates of the indoheptamethine cyanine dye are photoelectric converters for the IR region of the spectrum. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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