NDLI: Formation of trans-2-[4-(Dimethylamino)Styryl]-3-Ethyl-1,3-Benzothiazolium Perchlorate Dimers in the Presence of Sodium Polystyrene Sulfonate

Content Provider	Springer Nature Link
Author	Lavysh, A. V. Maskevich, A. A. Lugovskii, A. A. Voropai, E. S. Sulatskaya, A. I. Kuznetsova, I. M. Turoverov, K. K.
Copyright Year	2017
Abstract	The spectral properties of a novel thioflavin T derivative, trans-2-[4-(dimethylamino)styryl]-3-ethyl-1,3-benzothiazolium perchlorate (DMASEBT), were studied in aqueous solutions in the presence of sodium polystyrene sulfonate (SPS). It was shown that SPS either could interact with dye monomers or initiate the formation of non-fluorescent dye dimers depending on the concentration ratio of dye and polyelectrolyte. DMASEBT dimer formation in the presence of SPS produced a hypsochromic shift by 40 nm in the absorption spectrum and quenched fluorescence. A bathochromic shift of the absorption spectrum and an increase of the fluorescence intensity by an order of magnitude were observed if DMASEBT monomers interacted with SPS. Quantum-chemical analysis found that sandwich dimers (H-aggregates) were most stable. A comparison of DMASEBT spectra in the presence of SPS and amyloid fibrils showed that DMASEBT molecules were incorporated into amyloid fibrils as monomers. The spectral changes associated with this incorporation could not be explained by the formation of dye aggregates.
Starting Page	917
Ending Page	923
Page Count	7
File Format	PDF
ISSN	00219037
Journal	Journal of Applied Spectroscopy
Volume Number	83
Issue Number	6
e-ISSN	15738647
Language	English
Publisher	Springer US
Publisher Date	2017-01-26
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	thioflavin T derivatives amyloid fibrils sodium polystyrene sulfonate absorption fluorescence dimer Atomic/Molecular Structure and Spectra Analytical Chemistry
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Condensed Matter Physics

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