The Dependence Of The Spectroscopic Properties Of Orcein Dyes On The Hydrogen Bonding From Protic Solvents: Insights From Theory And Experiments

2021 ◽  
Author(s):  
Catia Clementi ◽  
Aldo Romani ◽  
Fausto Elisei ◽  
Filippo De Angelis ◽  
Federica Daus ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Spectral Properties ◽  
Spectroscopic Properties ◽  
Protic Solvents ◽  
Main Components ◽  
Theory And Experiments

The electronic spectral properties of α-hydroxy-orcein (α-HO), one of the main components of the orcein dye, have been extensively investigated in solvents of different proticity through UV-Vis spectrophotometry combined with...

Investigation on the Spectroscopic Properties of Yb3+-doped Phosphate Glass

2011 ◽  
Vol 335-336 ◽  
pp. 1035-1038
Author(s):  
Qi Sang ◽  
Shao Jun Wang ◽  
Xue Rong Wang ◽  
Jing Wen Lu
Keyword(s):  
Cross Section ◽  
Spectral Properties ◽  
Emission Cross Section ◽  
Emission Spectra ◽  
Spectroscopic Properties ◽  
Pump Intensity ◽  
Doping Content ◽  
Performance Parameters ◽  
Particle Count ◽  
Laser Glass

A series of the Yb3+ -doped phosphate laser glass have been prepared under high temperature and different doping content and the fluorescence and absorption spectrum is observed, respectively. The influences of the Yb3+ -doped content on the spectral properties of the glass are analyzed and the optimal mole fraction is 4 %. The emission cross-section and fluorescent lifetime is calculated with McCumber theory. Furthermore, the integrated absorption cross-section, the full width at half maximum of the emission spectra and the laser performance parameters such as least particle count, saturation pump intensity and lowest pump intensity of Yb3+ -doped laser glass is calculated.

The effect of protic solvents in the conversion of lignin from Earleaf Acacia tree

2021 ◽  
Vol 11 (1) ◽  
pp. 123-126
Author(s):  
Khoa Phung Thanh ◽  
Khanh Vu Bao ◽  
Phat Huynh Van ◽  
Truc Nguyen Kim ◽  
An Tran Nguyen Minh ◽  
...  
Keyword(s):  
Aromatic Compounds ◽  
Solvent Polarity ◽  
Pulp Industry ◽  
Protic Solvents ◽  
Renewable Feedstock ◽  
Bulk Chemical ◽  
Paper And Pulp ◽  
Paper And Pulp Industry ◽  
Main Components ◽  
Acacia Tree

Lignin is one of main components of lignocellulosic along with cellulose and hemicellulose. It is a by-product of the paper and pulp industry, and has aromatic backbones making them an ideal renewable feedstock of aromatic compounds for a range of applications. Catalytic conversion of lignin from Earleaf Acacia tree was performed using high pressure/temperature reactor with Ru/C catalyst and protic solvents. The results showed that the conversion of lignin depends on the solvent polarity of protic solvents, and Ru/C catalyst enhanced the lignin conversion. Phenolic compounds are the main components of lignin conversion. Those compounds can be applied as a basement for bulk chemical and fuels.

Alkyl pyridinium iodocyanocuprate(i) chains (RPy)2[Cu2I3(CN)]: insight into structural, electronic and spectroscopic properties

2020 ◽  
Vol 49 (5) ◽  
pp. 1492-1500
Author(s):  
Taylor C. Wells ◽  
Michaela E. Streep ◽  
Abigail L. Martucci ◽  
Aaron D. Nicholas ◽  
Robert D. Pike
Keyword(s):  
Hydrogen Bonding ◽  
Charge Transfer ◽  
Spectroscopic Properties ◽  
Insight Into

Reaction of RPyI, CuI, and CuCN produces anionic iodocyanocuprate(i) chains, (RPy)2[Cu2I3CN] which exhibit charge transfer that is influenced by the hydrogen bonding between the cation and the triiodide groups.

Molecular structure, hydrogen bonding, basicity and spectroscopic properties of N,N′-dimethylpiperazine betaines and their hydrohalides

2002 ◽  
Vol 614 (1-3) ◽  
pp. 23-32 ◽  
Author(s):  
Z. Dega-Szafran ◽  
M. Jaskólski ◽  
I. Kurzyca ◽  
P. Barczyński ◽  
M. Szafran
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bonding ◽  
Spectroscopic Properties
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