Theoretical Model for the Effect of Temperature on the Fluorescence Spectrum of Laser Dye (Rh6G) in Acetone

Al–Kadhemy, Mahasin F. Hadi; Al-Zuky, Ali A.; Daear, Halah Fakhir

doi:10.18052/www.scipress.com/ilcpa.38.151

Cited by 6 publications

(7 citation statements)

References 7 publications

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“…These may either luminesce or not at lower frequencies than monomeric excited molecules. Furthermore, as the concentration increased, the mean distance between molecules decreased and so the energy transfer effect was favoured, in which the excitation energy of a molecule was transmitted to nearby molecules; this can occur between molecules separated by up to 100 nm …”

Section: Resultssupporting

confidence: 64%

Synthesis and photophysical studies on a new fluorescent phenothiazine‐based derivative

et al. 2020

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A new typical phenothiazine compound functionalized with thienyl-indandione derivative (PTZTID) was synthesized and characterized using spectral analysis (ultraviolet-visible (UV-vis) light, infrared (IR), 1 H nuclear magnetic resonance (NMR) and 13 C NMR tools). The UV-vis absorption spectra of the PTZTID solution in 1,4-dioxane showed two absorption bands attributed to localized aromatic π-π* transitions of conjugated aromatic moieties and intramolecular charge transfer with the characteristics of a π-π* transition. The fluorescence spectra exhibited a maximum emission wavelength at 580 nm. The effect of concentration on photophysical properties took the form of a minor hypsochromic shift, which was attributed to some extent to the occurrence of H-type aggregation of the PTZTID derivative. Binary solvent effects on the spectroscopic behaviour of PTZTID were measured at different H 2 O/1,4-dioxane ratios. Similarly, when increasing the water content, a hypsochromic shift was observed that resulted from H-type aggregation.Furthermore, geometry and electronic configurations of PTZTID were studied at density functional theory /B3LYP level and indicated that the compound had a nonplanar (butterfly structure). K E Y W O R D Scomputational studies, density functional theory, fluorescence, PTZTID

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Section: Resultssupporting

confidence: 64%

Synthesis and photophysical studies on a new fluorescent phenothiazine‐based derivative

et al. 2020

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“…The absorption maxima of Cl‐SBR at 287 nm is attributed to the π to π* transition of the polymer. It can be seen from the figure that the π to π* transition of the all the rubber composite materials is changed to slightly a higher wavelength region . For example, 7 phr composite shows a higher UV absorption peak at 295 nm.…”

Section: Resultsmentioning

confidence: 94%

Evaluation of spectral, thermal, flame retardant, dielectric, solvent diffusion, and transport behavior of novel nanocomposite derived from chlorinated styrene butadiene rubber and manganous tungstate

Jasna

Priyanka

Mathew³

et al. 2018

Polymer Composites

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Novel nanocomposites based on chlorinated styrene butadiene rubber (Cl‐SBR) and manganous tungstate (MnWO4) nanoparticles have been developed using a simple and efficient open two roll mixing mill at room temperature. The nanocomposite containing varying loading of nanoparticles have been assessed for their spectral behavior, thermal, dielectric, flammability properties as well as the transport of aromatic solvents through their networks. Intermolecular interaction between the chlorinated moieties of SBR and MnWO4 has been revealed by Fourier transform infrared and UV‐Vis spectral studies. The uniform dispersion of nanoparticles and the crystalline peaks of MnWO4 nanoparticles in Cl‐SBR were observed from SEM and XRD, respectively. Thermogravimetric analysis and flame resistance analysis showed that the thermal stability and flame retardancy of Cl‐SBR increased with increasing ratio of MnWO4. The dielectric constant was much improved with the entire range of frequencies and the optimum dielectric constant was obtained for 7 phr loading. Transport parameters like the sorption, diffusion, and permeation coefficients were tabulated in terms of the nature of solvent, and the loading of nanoparticles. The solvent uptake reduced by the addition of nanoparticles up to 7 phr and thereafter the solvent uptake increases. The activation energy for the diffusion, sorption, and permeation process was evaluated and these values were highest in xylene at all filler loading. The mechanism of transport of the aromatic solvents through Cl‐SBR/MnWO4 nanocomposite was found to be anomalous mode. POLYM. COMPOS., 39:E1880–E1889, 2018. © 2018 Society of Plastics Engineers

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“…These results are in agreement with the literature. 32,44 It could also be noticed that a plateau was not reached. 43 When a plateau is reached, at high concentrations, aggregation formation restricts the peak shift.…”

Section: Resultsmentioning

confidence: 99%

Electrospinning of laser dye Rhodamine B-doped poly(methyl methacrylate) nanofibers

Dukali¹,

Radovic²,

Stojanović³

et al. 2014

J Serb Chem Soc

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The electrospinning of rhodamine B (RhB)-doped poly(methyl methacrylate) (PMMA) is presented as a promising technique for processing photoluminescent nanofibers. Nanofibers with concentrations of RhB in PMMA between 0.05 and 2.0 wt. % were studied. The FTIR spectrum, fiber morphology, thermal properties and optical properties of the nanofibers were investigated. Smooth, bead-free and nonporous nanofibers were obtained. Differential scanning calorimetry (DSC) results revealed that the glass transition temperature of the PMMA (T g ) increased with the increasing of RhB content up to 0.5 wt. % and thereafter decreased. The laser induced fluorescence (LIF) technique was used to study the fluorescence properties of the nanofibers. The maximum fluorescence emission was observed at a concentration of RhB of 0.2 wt. %.

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Theoretical Model for the Effect of Temperature on the Fluorescence Spectrum of Laser Dye (Rh6G) in Acetone

Cited by 6 publications

References 7 publications

Synthesis and photophysical studies on a new fluorescent phenothiazine‐based derivative

Synthesis and photophysical studies on a new fluorescent phenothiazine‐based derivative

Evaluation of spectral, thermal, flame retardant, dielectric, solvent diffusion, and transport behavior of novel nanocomposite derived from chlorinated styrene butadiene rubber and manganous tungstate

Electrospinning of laser dye Rhodamine B-doped poly(methyl methacrylate) nanofibers

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