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

Nikolenko, L. M.; Ivanchihina, A.V.; Бричкин, С. Б.; Разумов, В. Ф.

doi:10.1016/j.jcis.2008.12.022

Cited by 18 publications

(10 citation statements)

References 22 publications

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“…The diameter of water droplets for our sample changes from 1.55 nm (X = 1) and 2.25 nm (X = 3) to 4 nm (X = 8) (Nikolenko et al 2009). At constant X, with the change of droplet concentration, the size of the droplet is constant, but the interaction between droplets is changing.…”

Section: Introductionmentioning

confidence: 90%

Photophysics of Cationic and Anionic Dye Mixed by Sodium-2-Diethylhexyl Sulfosuccinate–Water–Hexane at Low Molar Ratio (X ≤ 8)

Alizadeh

Shavakandi

Sharifi

2018

Iran J Sci Technol Trans Sci

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The fluorescence, absorption spectra, and Z-scan (open aperture) were studied in mixture of anionic dye (fluorescein sodium salt-FSS) and cationic dye (Rhodamine B-RhB) with low size of water droplets. The droplet was prepared by sodium-2-diethylhexyl sulfosuccinate/water/hexane microemulsion (MEs) at water to the surfactant molar ratio less than 8. The absorbance and fluorescence intensity was studied at different dye-doped droplet size and concentration. The results evidenced that the fluorescence spectra of FSS in MEs are less than water, but the fluorescence intensity of Rhodamine B in MEs is higher than bulk water. The results evidenced that the fluorescence depends on the size (molar ratio) of the droplet. The Rhodamine B in MEs with X = 3 (middle size) has a higher fluorescence intensity than other X. However, the fluorescence intensity of FSS reduces with reduction of droplet size. The red shift of fluorescence was studied by the Bilot and Kawski theory; the excited dipole moment over the ground state value (l e/ l g ) was determined. The results indicated that in the same dye in solution concentration, the l e/ l g depends on molar ratio. The nonlinear optical properties of dye/sodium-2-diethylhexyl sulfosuccinate/hexane/water MEs for two types of dye (FSS and RhB) at constant X = 8 were investigated. The results show that two-photon absorption coefficient for both dyes increased with the increase of the droplet concentration.

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Section: Introductionmentioning

confidence: 90%

Photophysics of Cationic and Anionic Dye Mixed by Sodium-2-Diethylhexyl Sulfosuccinate–Water–Hexane at Low Molar Ratio (X ≤ 8)

Alizadeh

Shavakandi

Sharifi

2018

Iran J Sci Technol Trans Sci

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“…Special attention was paid to design of novel materials for photography [51,52], exploration of colloidal systems including gold nanoparticles and quantum dots based on inorganic semiconductors such as CdS, CdSe and PbS [53,54]. Nanostructured systems based on inorganic semiconductors have being investigated as promising materials for solar cells [55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Research in the Field of Organic Photovoltaics at the Institute for Problems of Chemical Physics of Russian Academy of Sciences

Troshin

2015

Organic Photonics and Photovoltaics

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In the present review we highlight the main research activities in the field of organic photonics and photovoltaics at the Institute for Problems of Chemical Physics of Russian Academy of Sciences (IPCP RAS). Extensive investigation of optical and electrical properties of π-conjugated organic compounds performed at IPCP RAS since 1960's resulted in design of many exciting materials representing organic semiconductors, metals and superconductors. Organic Schottky barrier and p/n junction photovoltaic devices constructed at IPCP RAS in 1960's and 1970's were among the first examples of reasonably efficient organic solar cells at that time. These early discoveries inspired younger generations of the researchers to continue the work of their mentors and explore the world of organic materials and photonic devices such as molecular photonic switches, organic light emitting diodes, solar cells, photodetectors, photoswitchable organic field-effect transistors and memory elements.

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“…Symmetric cationic cyanine dyes play a major role in the aggregation process of anionic surfactants even below its critical micelles concentration (cmc), in which these cationic dyes act as mutual counter ion to reduce the electrostatic repulsion between the groups that carry the negative charge [2]. Many researchers have been reported on the micelles aggregation's type of AOT surfactant by using different physical methods [3][4][5][6]. AOT is soluble in any type of solvents and can form micro-emulsions with or without co-surfactants with oils [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…This dye is a symmetric cationic cyanine dye, where its absorption spectrum in solution shows three overlapping spectral bands; for monomer, dimer and higher aggregates [14]. The interaction of cyanine dyes with various types of surfactants was interested by many researchers [6,15,16]. Pal and Pal [15] have shown that AOT induces strong dichroism in the cationic pinacyanol dye aqueous solutions, and that was the first report of the induction of circular dichroism in a cationic dye by AOT or by other detergents in dilute pure aqueous solutions (as they reported).…”

Section: Introductionmentioning

confidence: 99%

Circular Dichroism and Derivative Spectra Study of the Excitonic Aggregation of Pinacyanol by Aerosol-OT

Khouri¹,

Buss²

2012

OJPC

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Different structures are proposed for the complexes formed from the interaction between the cationic cyanine dye 1, 1’-diethyl-2, 2’-carbocyanine chloride (Pinacyanol chloride) and the anionic surfactant sodium bis (2-ethylhexyl) sul- fosuccinate (Aerosol-OT) in ethanol-water solutions. UV/vis and electronic circular dichroism (CD) spectra provide tools to study the concentration and solvent dependence of this interaction. The aggregation spectra of the dye are dominated by a strongly blue-shifted, sharp and single visible band, which appears at concentrations much below the critical micelle concentration (cmc) of Aerosol-OT. Above the cmc, the spectra in pure aqueous solution indicate disso- ciation into monomer and dimer species, and the system becomes completely empty of chirality. Two different CD spectra with a distinct isosbestic point are observed for complexes with different surfactant to dye ratios. Both the addi- tion of ethanol (more than 7.5%) and increasing the temperature retards the metachromatic process between the dye and Aerosol-OT. By using the peakFit program, the two overlapping excitonic absorption bands together with the optically inactive absorption band for one spectrum (the most optimal one) at a specific Aerosol-OT concentration were sepa- rated

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

Cited by 18 publications

References 22 publications

Photophysics of Cationic and Anionic Dye Mixed by Sodium-2-Diethylhexyl Sulfosuccinate–Water–Hexane at Low Molar Ratio (X ≤ 8)

Photophysics of Cationic and Anionic Dye Mixed by Sodium-2-Diethylhexyl Sulfosuccinate–Water–Hexane at Low Molar Ratio (X ≤ 8)

Research in the Field of Organic Photovoltaics at the Institute for Problems of Chemical Physics of Russian Academy of Sciences

Circular Dichroism and Derivative Spectra Study of the Excitonic Aggregation of Pinacyanol by Aerosol-OT

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