Elastic properties and structural studies on some zinc-borate glasses derived from ultrasonic, FT-IR and X-ray techniques

2009 ◽  
Vol 475 (1-2) ◽  
pp. 535-542 ◽  
Author(s):  
M.S. Gaafar ◽  
N.S. Abd El-Aal ◽  
O.W. Gerges ◽  
G. El-Amir
Keyword(s):  
Elastic Properties ◽  
Zinc Borate ◽  
Borate Glasses ◽  
Structural Studies ◽  
X Ray ◽  
Ft Ir

Nitroxide radicals appended to phthalonitriles: synthesis, structural characterization and photophysical properties

2021 ◽  
Vol 77 (3) ◽  
pp. 137-143
Author(s):  
Ismail Fidan ◽  
Emel Onal ◽  
Catherine Hirel
Keyword(s):  
Magnetic Measurements ◽  
Photophysical Properties ◽  
Nucleophilic Aromatic Substitution ◽  
Structural Studies ◽  
Aromatic Substitution ◽  
Nitronyl Nitroxide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Assisted ◽  
Ft Ir

The syntheses of 4-[4-(4,4,5,5-tetramethyl-2-imidazoline-3-oxide-1-oxyl-2-yl)phenoxy]phthalonitrile (3, C21H19N4O3) and 4-[4-(4,4,5,5-tetramethyl-2-imidazoline-1-oxyl-2-yl)phenoxy]phthalonitrile (4) were carried out by microwave-assisted nucleophilic aromatic substitution of 4-nitrophthalonitrile (2) by the pre-formed 2-(4-hydroxyphenyl)-4,4,5,5-tetramethyl-2-imidazoline-3-oxide-1-oxyl (1). Compounds 3 and 4 were characterized unambiguously by a rich array of analyses, such as melting point, FT–IR, MALDI–TOF MS, elemental analysis, UV–Vis, CV, EPR, magnetic measurements and single-crystal X-ray diffraction. Structural studies demonstrate that the C—H...X and C—X...π (X = O and N) interactions in the radical nitronyl nitroxide groups play an important role in the assembly of the crystal structures. Moreover, cyclic voltammetry analyses show that the phthalonitrile substituent retains the redox properties of the Ullman radicals.

X-ray, FT-IR, NMR and PM5 structural studies and antibacterial activity of unexpectedly stable salinomycin–benzotriazole intermediate ester

2012 ◽  
Vol 1022 ◽  
pp. 197-203 ◽  
Author(s):  
Adam Huczyński ◽  
Jan Janczak ◽  
Michał Antoszczak ◽  
Joanna Stefańska ◽  
Bogumil Brzezinski
Keyword(s):  
Antibacterial Activity ◽  
Structural Studies ◽  
X Ray ◽  
Ft Ir

X-ray photoemission study of Pr3+in zinc borate glasses

1999 ◽  
Vol 79 (11-12) ◽  
pp. 2145-2155 ◽  
Author(s):  
G. Speranza ◽  
M. Ferrari ◽  
M. Bettinelli
Keyword(s):  
Zinc Borate ◽  
Borate Glasses ◽  
X Ray ◽  
Photoemission Study

X-ray Diffraction, FT-IR, and13C CP/MAS NMR Structural Studies of Solvated and Desolvated C-Methylcalix[4]resorcinarene

2010 ◽  
Vol 114 (32) ◽  
pp. 10311-10320 ◽  
Author(s):  
Rafal Kuzmicz ◽  
Violetta Kowalska ◽  
Sławomir Domagała ◽  
Marcin Stachowicz ◽  
Krzysztof Woźniak ◽  
...  
Keyword(s):  
Mas Nmr ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ft Ir ◽  
Cp Mas Nmr

scholarly journals Ultrasound velocities and elastic properties of LICL doped zinc –borate glasses

2018 ◽  
Vol 7 (4.5) ◽  
pp. 580
Author(s):  
D. Vijayatha ◽  
G. Chandrashekaraiah ◽  
R. Viswanatha ◽  
C. Narayana Reddy
Keyword(s):  
Shear Modulus ◽  
Elastic Property ◽  
Elastic Properties ◽  
Elastic Moduli ◽  
Zinc Borate ◽  
Ultra Sound ◽  
Borate Glasses ◽  
Zinc Ions ◽  
Moduli Of Elasticity ◽  
Sound Velocities

Sound velocities and elastic property measurements have been employed to study the strength and rigidity of the structure of ZnO-B2O3 glasses doped with LiCl. Moduli of elasticity such as longitudinal, Young`s , bulk and shear modulus have been calculated using ultra sound velocities such as longitudinal and transverse velocities are measured at a frequency of 10 MHz as function of LiCl concentration. Both sound velocities and elastic moduli decrease with increase of LiCl concentration. The results are discussed in the view of borate network and dual structural role played by the divalent zinc ions present in the network. The results indicate that the Zn+2 ions are likely to occupy network forming positions in this glass system. While LiCl is a typically dissolved in the borate network and Cl- occupy the interstitial positions. 

X-ray photoemission study of Pr 3+ in zinc borate glasses

1999 ◽  
Vol 79 (11-12) ◽  
pp. 2145-2155
Author(s):  
G. Speranza, M. Ferrari, M. Bettinelli
Keyword(s):  
Zinc Borate ◽  
Borate Glasses ◽  
X Ray ◽  
Photoemission Study

Elastic properties of Li+ doped lead zinc borate glasses

2014 ◽  
Author(s):  
R. Rajaramakrishna ◽  
R. Lakshmikantha ◽  
R. V. Anavekar
Keyword(s):  
Elastic Properties ◽  
Zinc Borate ◽  
Borate Glasses ◽  
Lead Zinc

Synthesis and Characterization of Nanofibres of 2ZnO·3B2O3·5H2O Ceramic Composite Using the Sol-Gel Processing and the Electrospinning Techniques

2015 ◽  
Vol 749 ◽  
pp. 169-173 ◽  
Author(s):  
Fatih Sevim ◽  
Adem Kara ◽  
Oguz Aksakal ◽  
Fatih Demir ◽  
Hayrettin Eroglu
Keyword(s):  
Ceramic Composite ◽  
Sol Gel ◽  
Zinc Nitrate ◽  
Zinc Borate ◽  
Experimental Conditions ◽  
Electrospinning Technique ◽  
X Ray ◽  
Ft Ir ◽  
Gel Processing

2ZnO.3B2O3.nH2O (Zinc borate) having the industrially important composite and used as flame retardant, anti-smoke and semiconductor in the electronic circuits was examined different crystal structures. In this study, nanofibers of PVA /zinc nitrate/ boric acid composite were prepared by using sol-gel processing and electrospinning technique. By high temperature calcinations of the above precursor fibers, nanofibers of 2ZnO.3B2O3.5H2O composite with diameters of 110 nm could be successfully obtained. The products have been characterized by X-ray powder diffraction (XRD), thermogravimetry (TG) and differential thermal analysis (DTA), scanning electron microscopy (SEM) and FT-IR (Fourier transform-infrared spectroscopy). The effects of experimental conditions on the products were investigated.

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