Concentration quenching and depolarization of rhodamine 6G in the presence of fluorescent dimers in polyvinyl alcohol films

Bojarski, Piotr

doi:10.1016/s0009-2614(97)00971-8

Cited by 52 publications

(72 citation statements)

References 26 publications

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“…This effect has been confirmed experimentally in inodel donor-acceptor systems [9][10][11][12][13] as well as in monomer-fluorescent dimer systems [14][15][16]. In those systems it modifies significantly the concentration courses of luminescent observables, but it is relatively weak as compared to the forward transfer and energy migration.…”

Section: Introductionmentioning

confidence: 73%

Excitation Energy Transport between the Ionic Forms of Rhodamine B in Viscous Solutions

Bojarski

Kułak

1998

Acta Phys. Pol. A

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Excitation energy transport between zwitterion and cationic form of rhodamine B in glycerol-ethanol mixture is studied. Concentration course of the quantum yield exhibits a rapid drop at intermediate concentrations, where no dimers are formed contrary to the results of measurements carried out for solutions with a trace amount of acid or base in which single ionic forms are adopted. To describe properly such concentration behavior of the quantum yield forward and reverse, nonradiative excitation energy transport between the forms is considered. This task is performed by comparing experimental data with Monte-Carlo simulations.

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Section: Introductionmentioning

confidence: 73%

Excitation Energy Transport between the Ionic Forms of Rhodamine B in Viscous Solutions

Bojarski

Kułak

1998

Acta Phys. Pol. A

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“…It should be noted that this is a similar ratio to that observed for an R6G concentration of 1x10 À5 M in ethanol. [25] The results strongly suggest that the P123 environment (plus any residual isopropanol) is capable of suppressing significant aggregation (relative to other matrices and solvents, such as water), but is not as strong a monomer solvent as ethanol.…”

Section: à3mentioning

confidence: 95%

Mesostructured Dye‐Doped Titanium Dioxide for Micro‐Optoelectronic Applications

et al. 2003

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Optically transparent, mesostructured titanium dioxide thin films were fabricated using an amphiphilic poly(alkylene oxide) block copolymer template in combination with retarded hydrolysis of a titanium isopropoxide precursor. Prior to calcination, the films displayed a stable hexagonal mesophase and high refractive indices (1.5 to 1.6) relative to mesostructured silica (1.43). After calcination, the hexagonal mesophase was retained with surface areas > 300 m2 g-1. The dye Rhodamine 6G (commonly used as a laser dye) was incorporated into the copolymer micelle during the templating process. In this way, novel dye-doped mesostructured titanium dioxide films were synthesised. The copolymer not only directs the film structure, but also provides a solubilizing environment suitable for sustaining a high monomer-to-aggregate ratio at elevated dye concentrations. The dye-doped films displayed optical thresholdlike behaviour characteristic of amplified spontaneous emission. Soft lithography was successfully applied to micropattern the dye-doped films. These results pave the way for the fabrication and demonstration of novel microlaser structures and other active optical structures. This new, high-refractive index, mesostructured, dye-doped material could also find applications in areas such as optical coatings, displays and integrated photonic devices.

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“…The dye covering the ZnO surface absorbs also the emission at around 500 nm. It is known that Rh6G has strong absorption bands near 500-530 nm and in the UV region (Bojarski, 2002;Ethiraja et al, 2005;Innocenzi et al, 1996). The findings indicate that the excitation of Rh6G at the surface of ZnO nanocrystals during our experiment may occur through two channels, which are an energy transfer from the ZnO deep level emission centers and a direct laser excitation.…”

Section: Zno Nanocrystals Capped By Rh6gmentioning

confidence: 54%

“…The Rh6G solutions display only one PL band at ~560 nm resulting from monomers (Innocenzi et al, 1996). With increasing the dye concentration, this band exhibits redshift, which is attributed to formation of dimers and increasing their amount (Bojarski, 2002;Innocenzi et al, 1996). The aggregate formation process is clearly displayed in the PL spectrum of the dye deposited onto a flat quartz glass surface ( Fig.…”

Section: Zno Nanocrystals Capped By Rh6gmentioning

confidence: 93%

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Multicolor Luminescence from Semiconductor Nanocrystal Composites Tunable in an Electric Field

Panin¹

2012

Cathodoluminescence

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Concentration quenching and depolarization of rhodamine 6G in the presence of fluorescent dimers in polyvinyl alcohol films

Cited by 52 publications

References 26 publications

Excitation Energy Transport between the Ionic Forms of Rhodamine B in Viscous Solutions

Excitation Energy Transport between the Ionic Forms of Rhodamine B in Viscous Solutions

Mesostructured Dye‐Doped Titanium Dioxide for Micro‐Optoelectronic Applications

Multicolor Luminescence from Semiconductor Nanocrystal Composites Tunable in an Electric Field

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