Mixtures of achiral amphiphilic cyanine dyes form helical tubular J-aggregates

Berlepsch, Hans von; Ludwig, Kai; Kirstein, Stefan; Böttcher, Christoph

doi:10.1016/j.chemphys.2011.04.027

Cited by 24 publications

(34 citation statements)

References 58 publications

(95 reference statements)

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“…calculations the conclusion was made that the structural parameter-the angle α of packing dye molecules in aggregate-is one of the most important characteristics of spectral properties of dye aggregates that determines the value of this shift [42,43]. Different one-dimensional and two-dimensional aggregates can be formed, and such supramolecular arrangement may be also important [44][45][46].…”

Section: Light Absorption Fluorescencementioning

confidence: 99%

“…It is a function of temperature-dependent exciton-phonon coupling [11,66], and in larger aggregates it may extend to up to tens of monomers. The spectral properties of J-aggregates depend also on spatial structures of large two-dimensional J-aggregates, which can be plane or tubular [46]. In two-dimensional structures both the line narrowing and superadiance can be influenced by the aggregate arrangement [67].…”

Section: Excitons In Dye Aggregatesmentioning

confidence: 99%

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Fluorescent J-aggregates of cyanine dyes: basic research and applications review

Bricks

Slominskii

Panas

et al. 2017

Methods Appl. Fluoresc.

301

293

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J-aggregates are fascinating fluorescent nanomaterials formed by highly ordered assembly of organic dyes with the spectroscopic properties dramatically different from that of single or disorderly assembled dye molecules. They demonstrate very narrow red-shifted absorption and emission bands, strongly increased absorbance together with the decrease of radiative lifetime, highly polarized emission and other valuable features. The mechanisms of their electronic transitions are understood by formation of delocalized excitons already on the level of several coupled monomers. Cyanine dyes are unique in forming J-aggregates over the broad spectral range, from blue to near-IR. With the aim to inspire further developments, this review is focused on the optical characteristics of J-aggregates in connection with the dye structures and on their diverse already realized and emerging applications.

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Section: Light Absorption Fluorescencementioning

confidence: 99%

Section: Excitons In Dye Aggregatesmentioning

confidence: 99%

Fluorescent J-aggregates of cyanine dyes: basic research and applications review

Bricks

Slominskii

Panas

et al. 2017

Methods Appl. Fluoresc.

301

293

View full text Add to dashboard Cite

show abstract

“…S6). It is important to note that the width of these ribbons as well as the pitch differ from the values proposed for the pure J-aggregates, 13 which means the silica super structure is not a direct one-to-one transcript of the aggregate structure. The formation of the silica nanoshell is initiated and driven by electrostatic forces that require charge matching between silica precursor and template (Fig.…”

mentioning

confidence: 98%

Nanohybrids from nanotubular J-aggregates and transparent silica nanoshells

et al. 2015

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“…However, a appropriate theoretical treatment of such systems still remains challenging. In this work we focus on the proper description ot the structural and optical properties of the tubular dye aggregate (TDA) of the amphiphilic cyanine dye named C8S3 [15], formed in aqueous solution, which have been discussed in several studies [4,[16][17][18].…”

mentioning

confidence: 99%

Site-dependence of van der Waals interaction explains exciton spectra of double-walled tubular J-aggregates

Megow

Röhr

Busch

et al. 2015

Phys. Chem. Chem. Phys.

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The simulation of the optical properties of supramolecular aggregates requires the development of methods, which are able to treat a large number of coupled chromophores interacting with the environment. Since it is currently not possible to treat large systems by quantum chemistry, the Frenkel exciton model is a valuable alternative. In this work we show how the Frenkel exciton model can be extended in order to explain the excitonic spectra of a specific double-walled tubular dye aggregate explicitly taking into account dispersive energy shifts of ground and excited states due to van der Waals interaction with all surrounding molecules. The experimentally observed splitting is well explained by the site-dependent energy shift of molecules placed at the inner or outer side of the double-walled tube, respectively. Therefore we can conclude that inclusion of the site-dependent dispersive effect in the theoretical description of optical properties of nanoscaled dye aggregates is mandatory.

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Mixtures of achiral amphiphilic cyanine dyes form helical tubular J-aggregates

Cited by 24 publications

References 58 publications

Fluorescent J-aggregates of cyanine dyes: basic research and applications review

Fluorescent J-aggregates of cyanine dyes: basic research and applications review

Nanohybrids from nanotubular J-aggregates and transparent silica nanoshells

Site-dependence of van der Waals interaction explains exciton spectra of double-walled tubular J-aggregates

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