scholarly journals Encapsulation of Rhodamine 6G Dye Molecules for Affecting Symmetry of Supramolecular Crystals of Melamine-Barbiturate

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1119
Author(s):  
Pavel V. Nesterov ◽  
Vladimir V. Shilovskikh ◽  
Alexander D. Sokolov ◽  
Vladislav V. Gurzhiy ◽  
Alexander S. Novikov ◽  
...  

Supramolecular organic systems can be used as a host for the encapsulation of small organic molecules. Here, we chose melamine barbiturate as a robust system capable of supramolecular assembly and the Rhodamine 6G dye entrapment as a guest molecule. The encapsulation of the dye was investigated by UV-visible spectroscopy, SEM and optical fluorescent microscopy while the insight into the crystal structure of the system was obtained by single crystal and powder XRD. For investigation of the system’s properties on a molecular level, the DFT and Classical Molecular Dynamics methods were utilized. Surprisingly, both theoretical and experimental data show not only the successful encapsulation of Rhodamine 6G molecules inside the supramolecular assembly, but also that inclusion of such molecules leads to the drastic improvement in the organic crystal shape. The melamine barbiturate in presence of the Rhodamine 6G molecules tend to form crystals with lesser degree of twinning and higher symmetry in shape than the ones without dye molecules.

2012 ◽  
Vol 406 ◽  
pp. 41-46 ◽  
Author(s):  
Ines Trenkmann ◽  
Sangho Bok ◽  
Venumadhav R. Korampally ◽  
Shubhra Gangopadhyay ◽  
Harald Graaf ◽  
...  

2019 ◽  
Vol 127 (8) ◽  
pp. 264
Author(s):  
А.Д. Дмитриев ◽  
А.М. Салецкий

The plasmon-coupled luminescence of rhodamine 6G dye molecules on a thin nickel film was experimentally and theoretically studied. The spatial distribution of the fluorescence of dye molecules, calculated using the transfer matrix method for the description of plane-layered media, agrees well with the experimental diagrams obtained for the spatial distribution of radiation of different polarization. The efficiency of the coupling of the fluorophor with the plasmons of a nickel film has been experimentally established.


Langmuir ◽  
2009 ◽  
Vol 25 (16) ◽  
pp. 9140-9148 ◽  
Author(s):  
Juan R. Sánchez-Valencia ◽  
Iwona Blaszczyk-Lezak ◽  
Juan P. Espinós ◽  
Said Hamad ◽  
Agustín R. González-Elipe ◽  
...  

2021 ◽  
pp. 116549
Author(s):  
Anjani R.K. Gollakota ◽  
Venkata Subbaiah Munagapati ◽  
Krishna Prasad Shadangi ◽  
Guda Mallikarjuna Reddy ◽  
Jet-Chau Wen ◽  
...  

Open Physics ◽  
2006 ◽  
Vol 4 (3) ◽  
Author(s):  
Abbas Al-Wattar ◽  
Baha Chiad ◽  
Wesam Twej ◽  
Sarmed Al-Awadi

AbstractThe solid host of a laser dye modifies its spectroscopic properties with respect to its liquid host. During the Sol-Gel process the dye molecules suffer from changing their environment. Two parameters affect this matter, the change in the concentration due to the evaporation of the solvent (drying) and the caging of dye molecules inside the pores or attachment to the silica network. Rhodamine 6G absorption and fluorescence spectra with different concentrations, during Sol-Gel time processing, have been studied. Both, absorption and fluorescence spectra of the dye in the solid host, for different concentrations, show a blue-shift relative to its liquid phase.


2002 ◽  
Vol 20 (2-4) ◽  
pp. 99-110 ◽  
Author(s):  
Achamma Kurian ◽  
Nibu A. George ◽  
Binoy Paul ◽  
V. P. N. Nampoori ◽  
C. P. G. Vallabhan

In this paper we report the use of the dual beam thermal lens technique as a quantitative method to determine absolute fluorescence quantum efficiency and concentration quenching of fluorescence emission from rhodamine 6G doped Poly(methyl methacrylate) (PMMA), prepared with different concentrations of the dye. A comparison of the present data with that reported in the literature indicates that the observed variation of fluorescence quantum yield with respect to the dye concentration follows a similar profile as in the earlier reported observations on rhodamine 6G in solution. The photodegradation of the dye molecules under cw laser excitation is also studied using the present method.


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