Effects of Surfactants on the Spectral Properties of Carbocyanine Dyes in Solutions

Бричкин, С. Б.; Kurandina, M. A.; Nikolaeva, T. M.; Разумов, В. Ф.

doi:10.1023/b:hiec.0000048234.34797.7b

Cited by 13 publications

(17 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast to aqueous solutions where DEC can be present in the form of cis-monomer (λ max = 581 nm), dimer (λ max = 536 nm), H-aggregate (λ max = 526 nm), and J-aggregate (λ max = 661 nm) [14], in micellar solution DEC is present only in two forms, trans-monomer (λ max = 605 nm) and J-aggregate with λ max within the range of 654-662 nm, which agrees with the reported data [10]. Fig.…”

Section: Resultsmentioning

confidence: 93%

“…Previously [14], the deaggregation of dye in the DEC/AOT system in water was found to occur for [AOT] > 5 × 10 −3 M, that is, close to CMC for AOT [18,19]. The total amount of AOT molecules in the system (N AOT ) for various W is given in For low W , the amount of AOT molecules penetrated into water seems to be sufficient for deaggregation of dye.…”

Section: Formation Mechanism Of Dye-containing Micellar Solutionmentioning

confidence: 88%

See 1 more Smart Citation

Ternary AOT/water/hexane systems as “micellar sieves” for cyanine dye J-aggregates

Nikolenko

Ivanchihina

Бричкин

et al. 2009

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 93%

Section: Formation Mechanism Of Dye-containing Micellar Solutionmentioning

confidence: 88%

Ternary AOT/water/hexane systems as “micellar sieves” for cyanine dye J-aggregates

Nikolenko

Ivanchihina

Бричкин

et al. 2009

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…Such complexes with AOT probably become less soluble in water with an increase in their size,. Indeed, precipitation of microdispersed phase was observed in aqueous DEC solutions upon gradual increase in the surfactant concentration [20]. J aggregates stabilized by AOT in reverse-micelle solutions apparently settle under the action of gravity and can be practically completely separated by centrifuging the solution for 30-60 min.…”

Section: Resultsmentioning

confidence: 99%

Spectral properties of carbocyanine dyes in solutions of reverse AOT micelles

et al. 2005

Self Cite

View full text Add to dashboard Cite

Cyanine dyes are widely used in studies of various molecularly organized and biological systems [1][2][3][4]. Examples of such organized systems are microemulsions, normal and reverse micelles, lipid vesicles, and others. In these systems, individual stages of photosynthesis are modeled, and supramolecular systems for solar energy conversion are designed [3]. The formation of J aggregates in vesicles was observed in [5], when positively charged dye molecules were adsorbed on the negatively charged vesicle interface. In this case, strong Coulomb interaction between dye molecules and the vesicle interface can lead to the formation of J aggregates only at a very high concentration of dye molecules, and the minimum number of dye molecules necessary for J aggregate formation is 60 [6]. It has been shown that dye molecules are preferentially localized in the vesicles that already contain dye molecules rather than are uniformly distributed among all vesicles [3].The behavior of cyanines in solutions was intensely studied in the presence of surfactants [7][8][9], in normal [10-12] and reverse micelles [8,9,13]. It has been shown on the basis of spectral data that the decomposition of the dimer and the conversion of the cis-monomer to the trans -isomer occurs in reverse AOT micelles [14]. This cis -trans isomerization is due to strong electrostatic interaction of the dye with hydrophilic AOT groups at the interface between the organic phase and water, whereas the isomerization effect is much weaker in reverse micelles of neutral Triton X-100. Electrostatic interaction results in polarization and alignment of charged subunits in the dye molecule along the electric field, leading to conversion of the cis -to the transisomer. Hence, the absence of dye dimers in reverse micelles, as noted in [14], is due to the fact that the trans -isomer, unlike the cis -isomer, does not tend to form dimers in an aqueous medium.The preparation of monodispersed J aggregates of a given size, including those of an extremely small size, is a fundamental problem of great practical importance.One of possible ways of its solving seems to be the use of reverse micelles.Information on possible aggregated states of cyanine dyes in reverse micelles is rather controversial. For example, it has been established [13] that one dye molecule at the most can be present in the water pool of a single micelle, and the probability of occurrence of two dye molecules is of the order of 10 -5 . On the other hand, it is stated [14,15] that in water pools of reverse micelles with W ≥ 5 ( W = [H 2 O]/[AOT]), dye J aggregates are formed even at average dye concentrations much lower than one dye molecule per micelle. Zhang and Liu [13] believe that a dye molecule in micelles with a small water-pool radius is compressed by the surfactant shell, which results in distortion of planarity of the molecule, and molecule transforms into the nonfluorescent twisted monomeric state. In micelles of a greater size, the dye molecule exists in the planar fluorescent state in the water ...

show abstract

“…It is known that strong intermolecular forces are responsible for self-association of dyes in solution. [21,22] 4-PEG-TDI is a relatively rigid molecule with a large planar p-electron system with hydrophobic nature and therefore has a strong tendency to aggregate in polar solvents. Previous studies have already characterized aggregates of p-p stacked perylenediimide dyes [20] and terrylenediimide dyes like WS-TDI in aqueous solution, [2] which has a similar p-electron system as 4-PEG-TDI.…”

Section: Absorption and Emission Spectramentioning

confidence: 99%

Photophysics of New Photostable Rylene Derivatives: Applications in Single‐Molecule Studies and Membrane Labelling

Davies¹,

Jung²,

Wallis³

et al. 2010

ChemPhysChem

View full text Add to dashboard Cite

Three new photostable rylene dyes for applications in single molecule studies and membrane labelling have been synthesized and their photophysical properties were characterized. These dyes differ in the number of polyethylene glycol (PEG) chains attached to the core structure which is either a perylene derivate or a terrylene derivate. One perylene and one terrylene dye is modified with two PEG chains, and another terrylene derivate has four PEG chains. The results show that the terrylene dye with four PEG chains (4-PEG-TDI) forms soluble nonfluorescing H-aggregates in water, so that the absorption bands are blue-shifted with respect to those of the fluorescing monomeric form. The presence of a surfactant such as Pluronic P123 leads to the disruption of the aggregates due to the formation of monomers in micelles and a strong increase in fluorescence. Application for labelling cell membranes can be considered for this dye since it adsorbs in a similar way as monomer to a lipid bilayer. Furthermore a single-molecule study of all three rylene dyes in polymeric films of PMMA showed excellent photostability with respect to photobleaching, far above the photostability of other common water-soluble dyes, such as Oxazine-1, Atto647N, Cy5, Alexa647 and Rhodamin6G. Especially 4-PEG-TDI seems to be a promising dye for membrane labelling with its high photostability.

show abstract

Effects of Surfactants on the Spectral Properties of Carbocyanine Dyes in Solutions

Cited by 13 publications

References 8 publications

Ternary AOT/water/hexane systems as “micellar sieves” for cyanine dye J-aggregates

Ternary AOT/water/hexane systems as “micellar sieves” for cyanine dye J-aggregates

Spectral properties of carbocyanine dyes in solutions of reverse AOT micelles

Photophysics of New Photostable Rylene Derivatives: Applications in Single‐Molecule Studies and Membrane Labelling

Contact Info

Product

Resources

About