Optical, photo-physical properties and photostability of pyrromethene (PM-597) in ionic liquids as benign green-solvents

AL-Aqmar, Dalal M.; Abdelkader, H.I.; Kana, Maram T.H. Abou

doi:10.1016/j.jlumin.2015.01.011

Cited by 8 publications

(6 citation statements)

References 50 publications

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“…of the long surviving component begins a gradual decrease in intensity and shifts to red range. This finding conformed to our previous works [22][23][24]. Figure 4a-c displays the absorption spectra of IR-792, with various concentrations.…”

Section: Resultssupporting

confidence: 91%

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Spectroscopic and Photo-Physical Properties of Near-IR Laser Dye in Novel Benign Green Solvents

et al. 2020

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IR-792 as near IR (NIR) laser dye was dissolved with different concentrations in two types of ionic liquids (ILs) of different anion and cation, 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide (EMIM TFSI) & 1-Butyl-3-methylimidazolium tetrafluoroborate (BMIM BF 4 ), as the benign green solvent and in methanol (MeOH) as a standard solvent. The behavior of fluorescence of IR-792 dye was studied. The fluorescence of IR-792 dissolved in the ILs was heavily compared to organic solvent. Some photo-physical parameters of IR-792 were calculated. Mainly, IR-792 had a very low quantum yield of fluorescence with high intersystem crossing rate & fluorescence lifetime in picosecond range. Optical absorption and behavior of fluorescence for the rigorously the purified imidazolium ILs in the neat condition and effect of IR-792 on their fluorescence have been examined. The emission behavior of IR-792 in green solvents was independent upon the wavelength of excitation, while the emission behavior of green solvents dependent upon the wavelength of excitation whether in pure state or with NIR laser dye. At most, the intensity of fluorescence of ILs is dependent upon dye concentration.

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Section: Resultssupporting

confidence: 91%

“…Acknowledgments The authors would like to thank Cairo University for Supporting and funding this work through project no. (16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33).…”

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confidence: 99%

Spectroscopic and Photo-Physical Properties of Near-IR Laser Dye in Novel Benign Green Solvents

et al. 2020

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“…The oscillator strength (f) is an important characteristic of the dyes which shows the effective number of electrons whose transition from ground to excited state gives the absorption area in the electron spectrum [23]. Values of oscillator strength are calculated by using Eq.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic properties and amplified spontaneous emission of fluorescein laser dye in ionic liquids as green media

2015

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“…The refractive index (n D ) and density (ρ) values for binary mixtures of ionic liquids and water [BMIM BF 4 : H 2 O] with different ratios, were calculated using the Gladston–Dale model. [ 23 ]

n_{D} goodbreak= φ_{1} n_{1} goodbreak+ φ_{2} n_{2}

where φ 1 and φ 2 are the ionic liquid and water volume fractions, respectively, defined as:

φ_{1} goodbreak= \frac{χ_{1} M_{1} ρ_{2}}{χ_{1} M_{1} ρ_{2} + χ_{2} M_{2} ρ_{1}}

φ_{2} goodbreak= \frac{χ_{2} M_{2} ρ_{1}}{χ_{1} M_{1} ρ_{2} + χ_{2} M_{2} ρ_{1}}

As in our previous work, [ 24 ] the molar absorption coefficients (ε: extinction coefficients), the emission and absorption cross‐sections, the fluorescence quantum yield (φ s ), the fluorescence lifetime (τ), Oscillator strength, the transition dipole moment

((), μ_{12}^{2}),

the fluorescence energy yield (E f ), the attenuation length Λ(λ), the constant of radiative decay (Kr), and constant rate of intersystem crossover (k isc )for PM‐597 dissolved in binary mixture of ILs with water [BMIM BF 4 : H 2 O] with different ratios, were calculated and tabulated in Table 1). The electronic ground state structures of PM‐597 laser dye, ionic liquid BMIM BF 4 , and mixture of laser dye with ionic liquid (PM‐597/BMIM BF 4 ) were given via utilizing the DFT method.…”

Section: The Experimental Workmentioning

confidence: 86%

Experimental and theoretical study of optical properties of pyrromethene (PM‐597) laser dye in binary eco‐friendly solvent

Al-shamiri

Melhi

Alosaimi

et al. 2022

J of Physical Organic Chem

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The interaction of pyrromethene (PM‐597) laser dye with binary mixture of [1‐butyl‐3‐methylimidazolium tetrafluoro‐borate (BMIM BF4)] ionic liquid with water [BMIM BF4: H2O] as binary eco‐friendly solvent, were investigated experimentally and theoretically by means of photophysical properties, amplified spontaneous emission (ASE), photostability, electronic ground state of molecular structures of PM‐597, BMIM BF4 and mixture of (PM‐597/BMIM BF4) using the density functional theory (DFT) technique, molecular orbitals, energy gap (Eg) among HOMO and LUMO, and the maps of molecular electrostatic potential (MESP) for PM‐597 and mixture of (PM‐597/BMIM BF4) in gas phase were calculated using B3LYP/6‐31G(d) level of theory. The refractive index (nD) and density (ρ) values for binary mixes of ionic liquid with water [BMIM BF4: H2O] with different ratios, increases as molecular mass of ionic liquid (BMIM BF4) in water increases. The frequency doubling Nd‐YAG laser of 532 nm was used to investigate amplified spontaneous emission (ASE). Aside from that, the efficiency of energy conversion was explored. Efficiency is relatively high, and 20.6% was achieved, with good photostability in case of 5 × 10−4 mol/L of PM‐597 in binary mixture of [90% BMIM BF4: 10% H2O] that was a decrease to ~48.3% of the initial amplified spontaneous emission, this output energy was observed after pumping by 72,000 shots at relatively high repetition rate (10 Hz) and pumping energy (40 mJ). In this research, we had used the mixture of [(BMIM BF4: H2O] with different ratios, as binary eco‐friendly solvent instead of harmful organic solvents.

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Optical, photo-physical properties and photostability of pyrromethene (PM-597) in ionic liquids as benign green-solvents

Cited by 8 publications

References 50 publications

Spectroscopic and Photo-Physical Properties of Near-IR Laser Dye in Novel Benign Green Solvents

Spectroscopic and Photo-Physical Properties of Near-IR Laser Dye in Novel Benign Green Solvents

Spectroscopic properties and amplified spontaneous emission of fluorescein laser dye in ionic liquids as green media

Experimental and theoretical study of optical properties of pyrromethene (PM‐597) laser dye in binary eco‐friendly solvent

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