A study on fluorescence quenching of LD-425 by aromatic amines in 1,4-dioxane–acetonitrile mixtures

Deepa, H.R.; Thipperudrappa, J.; Kumar, H.M. Suresh

doi:10.1016/j.jlumin.2012.01.008

Cited by 21 publications

(8 citation statements)

References 22 publications

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“…We have observed from Table that the values of kinetic distance ‘ r ’ are greater than the encounter distance R in all the solvents. These results suggest that the sphere of action model holds good in the present system as similar to the results published by other researchers …”

Section: Resultssupporting

confidence: 92%

Solvatochromic study of 3‐N‐(N′‐methylacetamidino)benzanthrone and its interaction with dopamine by the fluorescence quenching mechanism

Bharathi¹,

Siddlingeshwar²,

Shivraj³

et al. 2018

Luminescence

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The change in photophysical properties of the organic molecule due to solvatochromic effect caused by different solvent environments at room temperature gives information about the dipole moments of 3-N-(N'-methylacetamidino)benzanthrone (3-MAB). The quantum yield, fluorescence lifetime of 3-MAB was measured in different solvents to calculate radiative and non-radiative rate constants. The results revealed that the excited state dipole moment (μ ) is relatively larger compared to the ground state dipole moment (μ ), indicating the excited state of the dye under study is more polar than the ground state and the same trend is noticed with theoretical calculations performed using the CAM-B3LYP/6-311+G(d,p) method. Further, the study on preferential solvation was carried out for 3-MAB dye in ethyl acetate-methanol solvent mixture. The fluorescence quenching method has been employed for the detection of dopamine using 3-MAB as fluorescent probe, using steady-state and time resolved methods at room temperature. The method enables dopamine in the micro molar range to be detected. Also, an attempt to verify the quenching process by employing different models has been tried. Various rate parameters are measured using these models, our results indicates the quenching process is diffusion limited.

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Section: Resultssupporting

confidence: 92%

Solvatochromic study of 3‐N‐(N′‐methylacetamidino)benzanthrone and its interaction with dopamine by the fluorescence quenching mechanism

Bharathi¹,

Siddlingeshwar²,

Shivraj³

et al. 2018

Luminescence

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show abstract

“…Whereas the reactions are said to be, diffusion‐limited only when R′ > R and k q > 4πN'R′D . It is clear from the Table that, k q > 4πN'R′D is true for the majority of the solvents (DMSO, DMF, ACN, methanol, ethanol, propanol and DCM), which is an expected result for diffusion‐limited reaction . Whereas for the less polar solvents (ethyl acetate (EA), toluene (TOL) and DXN) the value of k q < 4πN'R′D , such a low value of k q is due to the low value of the diffusion coefficient ( D ) .…”

Section: Resultsmentioning

confidence: 91%

Bimolecular fluorescence quenching reactions of the biologically active coumarin composite 2‐acetyl‐3H‐benzo[f]chromen‐3‐one in different solvents

Koppal

Melavanki

Kusanur³

et al. 2018

Luminescence

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A study on fluorescence quenching was carried out for the coumarin derivative 2-acetyl-3H-benzo[f]chromen-3-one (2AHBC) with aniline at room temperature. Efficient fluorescence quenching was observed and Stern-Volmer (S-V) plots showed upward curves from linearity in all solvents of different polarities. For the solute 2AHBC, ground state complex formation does not hold in our study. The kinetic distance (r) value was found to be greater than the encounter distance (R) and indicated that the quenching reaction was held within the sphere of action. Diffusion-limited reactions were found to be more prominent in high polarity solvents, namely dimethyl sulfoxide (DMSO), DMF, ACN, methanol, ethanol, propanol and DCM. The relationships between quenching constant (K ) and dielectric constants (ε) of the different solvents were studied.

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“…Recently, some interesting applications of 4-methyl-7-(4-morpholinyl)-2H-pyrano[2,3-b]pyridine-2-one (LD-425) -a laser dye determine the researchers to investigate the quenching of this compound by aromatic amines in different solvent mixtures of 1,4-dioxane and acetonitrile [84]. The quenching has occurred involving contributions of both dynamic and static quenching mechanisms.…”

Section: Fluorescence Quenching In Binary Solvent Mixturesmentioning

confidence: 99%

Investigations of absorption and emission spectral data in mixed liquid media. A short review of recent literature

Homocianu¹,

Airinei²

2015

Journal of Molecular Liquids

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A study on fluorescence quenching of LD-425 by aromatic amines in 1,4-dioxane–acetonitrile mixtures

Cited by 21 publications

References 22 publications

Solvatochromic study of 3‐N‐(N′‐methylacetamidino)benzanthrone and its interaction with dopamine by the fluorescence quenching mechanism

Solvatochromic study of 3‐N‐(N′‐methylacetamidino)benzanthrone and its interaction with dopamine by the fluorescence quenching mechanism

Bimolecular fluorescence quenching reactions of the biologically active coumarin composite 2‐acetyl‐3H‐benzo[f]chromen‐3‐one in different solvents

Investigations of absorption and emission spectral data in mixed liquid media. A short review of recent literature

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