Spectroscopic studies on naphthalene in the vapor phase. I. Fluorescence spectra from single vibronic levels

1975 ◽  
Vol 63 (10) ◽  
pp. 4519-4528 ◽  
Author(s):  
M. Stockburger ◽  
H. Gattermann ◽  
W. Klusmann
Keyword(s):  
Phase I ◽  
Vapor Phase ◽  
Fluorescence Spectra ◽  
Spectroscopic Studies

Polymerization from the vapor phase. I. Poly(p-phenyleneterephthalamide) gas barrier coatings

1980 ◽  
Vol 25 (7) ◽  
pp. 1391-1405 ◽  
Author(s):  
R. M. Ikeda ◽  
R. J. Angelo ◽  
F. P. Boettcher ◽  
R. N. Blomberg ◽  
M. R. Samuels
Keyword(s):  
Phase I ◽  
Vapor Phase ◽  
Gas Barrier ◽  
Barrier Coatings

scholarly journals Spectroscopic Studies of Dual Fluorescence in 2-(4-Fluorophenylamino)-5-(2,4-dihydroxybenzeno)-1,3,4-thiadiazole: Effect of Molecular Aggregation in a Micellar System

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2861 ◽  
Author(s):  
Grzegorz Czernel ◽  
Arkadiusz Matwijczuk ◽  
Dariusz Karcz ◽  
Andrzej Górecki ◽  
Agnieszka Niemczynowicz ◽  
...  
Keyword(s):  
Light Scattering ◽  
Fluorescence Spectra ◽  
Single Photon ◽  
Spectroscopic Studies ◽  
Fluorescence Probes ◽  
Molecular Aggregation ◽  
Micellar System ◽  
Dual Fluorescence ◽  
Fluorescence Measurements ◽  
Ionic Detergent

The article presents the results of spectroscopic studies focused on a selected compound from the 1,3,4-thiadiazole group—2-(4-fluorophenylamino)-5-(2,4-dihydroxybenzeno)-1,3,4-thia-diazole (FABT)—in a micellar system formed by Triton X-100, a non-ionic detergent. Fluorescence measurements revealed the phenomenon of dual fluorescence whose emergence is related to the particular molecular organisation of the compound, which depends both on the concentration of the detergent and, most of all, the concentration of the compound itself. Dual fluorescence of FABT in a micellar system was observed for the compound dissolved in a methanol aqueous system, i.e., an environment wherein the dual fluorescence of the compound had never been reported before. Based on the interpretation of UV-Vis electronic absorption, resonance light scattering (RLS), emission and excitation fluorescence spectra, as well as measurements of dynamic light scattering (DLS) and Principal Component Analysis (PCA), we were able to relate the occurrence of this effect to the process of molecular aggregation taking place between FABT molecules in the micellar system in question. Results of fluorescence spectra measurements and time-correlated single photon counting (TCSPC) indicate that dual fluorescence occurs at detergent concentrations necessary to form micellar systems, which in turn facilitate the process of aggregation of FABT molecules. The correlation between the observed fluorescence effects and the previous measurements performed for analogues from this group suggests the possibility of charge transfer (CT) within the range of detergent concentrations wherein the aforementioned fluorescence effects are observed. It ought to be emphasised that this type of fluorescence effects are relatively easy to induce, which predisposes this groups of fluorophores as ideal fluorescence probes in the context of biological samples.

Spectroscopic Studies on Dyes. IV. The Fluorescence Spectra of Thioindigo Dyes1

1957 ◽  
Vol 79 (10) ◽  
pp. 2464-2468 ◽  
Author(s):  
Delbert A. Rogers ◽  
J. David Margerum ◽  
George M. Wyman
Keyword(s):  
Fluorescence Spectra ◽  
Spectroscopic Studies

In situ spectroscopic studies on vapor phase catalytic decomposition of dimethyl oxalate

2017 ◽  
Vol 19 (11) ◽  
pp. 8034-8045 ◽  
Author(s):  
Shweta Hegde ◽  
Kalsang Tharpa ◽  
Satyanarayana Reddy Akuri ◽  
Rakesh K. ◽  
Ajay Kumar ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Catalytic Decomposition ◽  
Spectroscopic Studies ◽  
Hydroxyl Groups ◽  
Spectroscopic Measurements ◽  
Surface Hydroxyl ◽  
Dimethyl Oxalate ◽  
Catalytic Materials ◽  
Surface Hydroxyl Groups

Dimethyl oxalate (DMO) decomposition was investigated on various catalytic materials. In situ spectroscopic measurements revealed that DMO decomposition is observed more on acidic surfaces and is dependent on the presence of surface hydroxyl groups.

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