Tubular J-aggregates of a new thiacarbocyanine Cy5 dye for the far-red spectral region – a spectroscopic and cryo-transmission electron microscopy study.
The aggregation conduct of a phenol-substituted thiacarbocyanine Cy5 dye (5-chloro-2-[5-[5-chloro-3-(4-sulfobutyl)-3H-benzothiazol-2-ylidene]-3-phenyl-penta-1,3-dienyl]-3-(4-sulfobutyl)-benzothiazol-3-ium hydroxide, interior salt, triethylammonium salt) in aqueous answer is investigated utilizing steady-state absorption, linear dichroism, and fluorescence spectroscopies, in addition to cryogenic transmission electron microscopy (cryo-TEM). By growing the focus, the dye self-assembles in pure water into dimers and H-aggregates, the latter being uniform particles
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