First example of the ABC ν(OH) absorption structure for both gaseous and crystalline phase: infrared studies of dimethylphosphinic acid

1997 ◽  
Vol 404 (1-2) ◽  
pp. 55-62 ◽  
Author(s):  
K.G. Tokhadze ◽  
G.S. Denisov ◽  
M. Wierzejewska ◽  
Marek Drozd
Keyword(s):  
Crystalline Phase ◽  
Dimethylphosphinic Acid ◽  
Infrared Studies

Infrared Studies on Rotational Isomerism. V. 2-Nitroethanol

1971 ◽  
Vol 49 (23) ◽  
pp. 3815-3820 ◽  
Author(s):  
Paul A. Giguère ◽  
Tokiji Kawamura
Keyword(s):  
Hydrogen Bond ◽  
Crystalline Phase ◽  
Raman Effect ◽  
Rotational Isomerism ◽  
The Other ◽  
Trans Isomers ◽  
Definite Evidence ◽  
Pure Sample ◽  
Infrared Studies ◽  
Intramolecular Hydrogen

The i.r. spectra of 2-nitroethanol in the three physical states were measured between 4000 and 250 cm−1. The liquid and the crystal were also studied in Raman effect. In all three states the molecules exist as gauche and trans isomers, the former being stabilized by a weak intramolecular hydrogen bond. Definite evidence for a third isomer, previously reported in dilute CCl4 solutions, could not be ascertained from the vapor spectra as a function of temperature. On the other hand this study revealed appreciable decomposition of the vapor above 80 °C, with formation of nitroethylene and also some aldehyde. For that reason it was not possible to evaluate the enthalpy of isomerization. The difficulty of securing a pure sample of 2-nitroethanol is emphasized. Only one crystalline phase was obtained.

Infrared Studies of the Young Stellar Population of 30 Doradus

1980 ◽  
Vol 4 (1) ◽  
pp. 90-92
Author(s):  
P. J. McGregor ◽  
A. R. Hyland
Keyword(s):  
Star Formation ◽  
Stellar Population ◽  
Cluster Formation ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Formation Processes ◽  
Excellent Opportunity ◽  
Infrared Studies ◽  
30 Doradus

The 30 Doradus region offers an excellent opportunity to study cluster formation processes and recent star formation in the Large Magellanic Cloud.

Infrared studies of valinomycin-containing Langmuir-Blodgett films

Langmuir ◽  
1989 ◽  
Vol 5 (2) ◽  
pp. 330-332 ◽  
Author(s):  
V. A. Howarth ◽  
M. C. Petty ◽  
G. H. Davies ◽  
J. Yarwood
Keyword(s):  
Langmuir Blodgett ◽  
Infrared Studies ◽  
Langmuir Blodgett Films

Amorphous-to-crystalline phase transition of (InTe)x(GeTe) thin films

2010 ◽  
Vol 108 (2) ◽  
pp. 024506 ◽  
Author(s):  
Ki-Ho Song ◽  
Seung-Cheol Beak ◽  
Hyun-Yong Lee
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Crystalline Phase ◽  
Crystalline Phase Transition

scholarly journals Dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuta Saito ◽  
Shogo Hatayama ◽  
Yi Shuang ◽  
Paul Fons ◽  
Alexander V. Kolobov ◽  
...  
Keyword(s):  
Chemical Bonding ◽  
Crystalline Phase ◽  
Three Dimensional ◽  
Atomic Layer ◽  
Unusual Behavior ◽  
Weakly Bound ◽  
Covalently Bonded ◽  
Non Volatile Memory ◽  
Device Applications ◽  
Memory Applications

AbstractTwo-dimensional (2D) van der Waals (vdW) materials possess a crystal structure in which a covalently-bonded few atomic-layer motif forms a single unit with individual motifs being weakly bound to each other by vdW forces. Cr2Ge2Te6 is known as a 2D vdW ferromagnetic insulator as well as a potential phase change material for non-volatile memory applications. Here, we provide evidence for a dimensional transformation in the chemical bonding from a randomly bonded three-dimensional (3D) disordered amorphous phase to a 2D bonded vdW crystalline phase. A counterintuitive metastable “quasi-layered” state during crystallization that exhibits both “long-range order and short-range disorder” with respect to atomic alignment clearly distinguishes the system from conventional materials. This unusual behavior is thought to originate from the 2D nature of the crystalline phase. These observations provide insight into the crystallization mechanism of layered materials in general, and consequently, will be useful for the realization of 2D vdW material-based functional nanoelectronic device applications.

Sign in / Sign up

Export Citation Format

Share Document