Showing posts with label raman spectra. Show all posts
Showing posts with label raman spectra. Show all posts

Tuesday, 21 June 2022

Spectroscopic and DFT Studies of Distinct Anilines for Electronic and Optical Properties | Chapter 12 | New Trends in Physical Science Research Vol.5

 CNDO, MINDO, and PCILO were utilised in significant examinations of anilines to report biological activities such as oxidation, polymerization, arylation, alkylation, protonation, and conformation for photophysical and electrochemical characteristics. Using the electron density technique, these interactions allow great scope for assessing physical, chemical, and electrooptical characteristics. Experimental research such as FTIR and FT Raman, as well as computational studies with GaussView4.1 software employing B3LYP–basis set 6-311++(d,p) for electrooptical characteristics, are used to ascribe the family of anilines-aniline (AN), p-chloroaniline (CAN), and p-nitroaniline (NAN). The wave numbers are in the prescribed range relating to functional group and fingerprint areas, according to the interpretation of experimental FTIR and FT Raman spectra. The intensity of the wave numbers in Raman spectra is found to be lower than in infrared spectra. The molecular editor Avogadro is used to depict molecular structures for molecular properties. Computational evaluations are carried out for ideal architectures to verify that estimated infrared and Raman spectra match experimental spectra. Charge transfer interactions influence the dipole moment, EHomo, ELumo, energy gap, electrophilicity index, polarisation, and first order hyperpolarizability. With a lower energy gap, high polarizability, and first order Hyperpolarizability, NAN has a stronger propensity in charge transfer interactions, enabling for the formation of advanced optical materials and devices.

Author(s) Details:

Ch. Ravi Shankar Kumar,
Department of Physics, School of Science, GITAM University, Visakhapatnam - 530045, India.

Please see the link here:
https://stm.bookpi.org/NTPSR-V5/article/view/7168

Thursday, 26 August 2021

Study on Nanophosphors with Partially Polymerized SiO4 Tetrahedra Produced by Evaporation of Ca2Y8(SiO4)6O2: Eu Polycrystals | Chapter 12 | Recent Trends in Chemical and Material Sciences Vol. 2

 Pulsed electron beam evaporation of micrometer-sized polycrystalline phosphors of the composition Ca2Y8(SiO4)6O2: Eu generated nanophosphors in the amorphous form for the first time. When particle size decreases from micro to nanodimensional, the Raman spectra is altered, and the prohibited band width of the samples rises. The features of spectrum luminescence in polycrystalline and amorphous states have been investigated. It was discovered that when phosphors move to a nanoamorphous state, their photoluminescence hue changes from red-orange (Eu3+) to blue (Eu2+).


Author (S) Details

M. G. Zuev
Institute of Solid State Chemistry, Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia and Ural Federal University (Named After First President of Russia B. N. Yeltsin), Ekaterinburg, Russia.

V. G. Il'ves
Institute of Electrophysics, Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia.

S. Yu. Sokovnin
Ural Federal University (Named After First President of Russia B. N. Yeltsin), Ekaterinburg, Russia and Institute of Electrophysics, Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia.

E. Yu. Zhuravleva
Ural Federal University (Named After First President of Russia B. N. Yeltsin), Ekaterinburg, Russia.

View Book :- https://stm.bookpi.org/RTCAMS-V2/article/view/2913

Study on Nanophosphors with Partially Polymerized SiO4 Tetrahedra Produced by Evaporation of Ca2Y8(SiO4)6O2: Eu Polycrystals | Chapter 12 | Recent Trends in Chemical and Material Sciences Vol. 2

 Pulsed electron beam evaporation of micrometer-sized polycrystalline phosphors of the composition Ca2Y8(SiO4)6O2: Eu generated nanophosphors in the amorphous form for the first time. When particle size decreases from micro to nanodimensional, the Raman spectra is altered, and the prohibited band width of the samples rises. The features of spectrum luminescence in polycrystalline and amorphous states have been investigated. It was discovered that when phosphors move to a nanoamorphous state, their photoluminescence hue changes from red-orange (Eu3+) to blue (Eu2+).


Author (S) Details

M. G. Zuev
Institute of Solid State Chemistry, Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia and Ural Federal University (Named After First President of Russia B. N. Yeltsin), Ekaterinburg, Russia.

V. G. Il'ves
Institute of Electrophysics, Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia.

S. Yu. Sokovnin
Ural Federal University (Named After First President of Russia B. N. Yeltsin), Ekaterinburg, Russia and Institute of Electrophysics, Ural Branch of Russian Academy of Sciences, Ekaterinburg, Russia.

E. Yu. Zhuravleva
Ural Federal University (Named After First President of Russia B. N. Yeltsin), Ekaterinburg, Russia.

View Book :- https://stm.bookpi.org/RTCAMS-V2/article/view/2913