DRIVING FORCE FOR SOLID STATE AMORPHISATION IN THE Fe-B SYSTEM

1990 ◽  
Vol 51 (C4) ◽  
pp. C4-49-C4-54 ◽  
Author(s):  
M. T. CLAVAGUERA-MORA ◽  
M. D. BARO ◽  
S. SURIÑACH ◽  
N. CLAVAGUERA
Keyword(s):  
Solid State ◽  
Driving Force

Topochemically controlled solid-state methyl rearrangement in thiocyanurates

2001 ◽  
Vol 57 (3) ◽  
pp. 428-434 ◽  
Author(s):  
Mark Greenberg ◽  
Vitaly Shteiman ◽  
Menahem Kaftory
Keyword(s):  
Solid State ◽  
Driving Force ◽  
Mirror Plane ◽  
Energy Calculation ◽  
Asymmetric Unit ◽  
Methyl Transfer ◽  
Plate Shape ◽  
Polymorphic Forms ◽  
Independent Molecules ◽  
The Difference

4,6-Dimethoxy-3-methyl-1,3,5-triazine-2(3H)-thione crystallizes in two polymorphic forms, needles and plates. In the needle-shaped crystals (9a) the molecules occupy the crystallographic mirror plane, thus the layers are stacked along the b axis. The molecules of the other polymorph [plate-shape crystals, (9b)] are packed in a herringbone packing mode. Upon heating, (9b) undergoes a phase transition to form (9a). At 378 K the needles undergo O → S topochemically controlled methyl transfer in the solid state to produce 1-methyl-4-methoxy-6-methylthio-1,3,5-triazine-2(1H)-one in 75% yield. The enthalpy of the rearrangement is estimated to be −39.1 kJ mol−1. 1-Methyl-6-methoxy-4-methylthio-1,3,5-triazine-2(1H)-thione crystallizes in space group P21 with two crystallographically independent molecules in the asymmetric unit. Compound (9b) undergoes O → S methyl transfer in the solid state at 373 K. The rearrangement is topochemically assisted and the product, 1-methyl-2,4-bismethylthio-1,3,5-triazine-6(1H)-one, is obtained in quantitative yield. The enthalpy of the rearrangement is estimated to be −58.8 kJ mol−1. The crystal structures of the compounds as well as their DSC thermographs are described and discussed. Energy calculation by ab initio methods shows that the driving force for the reactions is the difference between the molecular energies of the pre-rearranged compounds and their products, 54.2 and 59.3 kJ mol−1 in the two cases, respectively.

Effective driving force applied on DNA inside a solid-state nanopore

2012 ◽  
Vol 86 (1) ◽  
Author(s):  
Bo Lu ◽  
David P. Hoogerheide ◽  
Qing Zhao ◽  
Dapeng Yu
Keyword(s):  
Solid State ◽  
Driving Force

Driving force evolution in solid-state sintering with coupling multiphysical fields

2020 ◽  
Vol 46 (8) ◽  
pp. 11584-11592
Author(s):  
Tan Shulin ◽  
Zhang Xiaomin ◽  
Zhao Zhipeng ◽  
Wu Zhouzhi
Keyword(s):  
Solid State ◽  
Driving Force ◽  
Solid State Sintering

Prediction of solid‐state amorphizing reaction using effective driving force

1995 ◽  
Vol 78 (2) ◽  
pp. 983-987 ◽  
Author(s):  
J. S. Kwak ◽  
E. J. Chi ◽  
J. D. Choi ◽  
S. W. Park ◽  
H. K. Baik ◽  
...  
Keyword(s):  
Solid State ◽  
Driving Force

Dynamics of Completely Unfolded and Native Proteins through Solid-State Nanopores as a Function of Electric Driving Force

ACS Nano ◽  
2011 ◽  
Vol 5 (5) ◽  
pp. 3628-3638 ◽  
Author(s):  
Abdelghani Oukhaled ◽  
Benjamin Cressiot ◽  
Laurent Bacri ◽  
Manuela Pastoriza-Gallego ◽  
Jean-Michel Betton ◽  
...  
Keyword(s):  
Solid State ◽  
Driving Force ◽  
Native Proteins ◽  
Electric Driving

scholarly journals Photoinduced 1,2,3,4-tetrahydropyridine ring conversions

2015 ◽  
Vol 11 ◽  
pp. 2166-2170
Author(s):  
Baiba Turovska ◽  
Henning Lund ◽  
Viesturs Lūsis ◽  
Anna Lielpētere ◽  
Edvards Liepiņš ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Solid State ◽  
Light Intensity ◽  
Photoinduced Electron Transfer ◽  
Driving Force ◽  
Spectroscopic Data

Stable heterocyclic hydroperoxide can be easily prepared as a product of fast oxidation of a 1,2,3,4-tetrahydropyridine by 3O2 if the solution is exposed to sunlight. The driving force for the photoinduced electron transfer is calculated from electrochemical and spectroscopic data. The outcome of the reaction depends on the light intensity and the concentration of O2. In the solid state the heterocyclic hydroperoxide is stable; in solution it is involved in further reactions.

Abnormal Grain Growth in Ultra-Thin Films of Germanium on Insulator

1983 ◽  
Vol 25 ◽  
Author(s):  
T. Yonehara ◽  
C.V. Tihompson ◽  
Henry I. Smith
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Solid State ◽  
Surface Energy ◽  
Film Thickness ◽  
Driving Force ◽  
Surface Relief ◽  
Relief Structure ◽  
Surface Energy Anisotropy ◽  
Energy Anisotropy

ABSTRACTThe growth of large secondary grains with (112) texture, and solid-state agglomeration to single-crystal islands have been observed by annealing ultra-thin (less than 1000Å) films of Ge. A driving force proportional to surface-energy anisotropy and inversely proportional to film thickness is believed to be responsible for both phenomena. The temperature for agglomeration decreases with film thickness, and is further depressed by the presence of Sn vapor. Patterning Ge into stripes increases secondary grain size and population. Encapsulation with a film of SiO2 suppresses agglomeration and alters crystallographic texture. A surface-relief structure of 0.2μm period and 300Å depth induces a (100) texture in some cases, and alters the morphology of agglomerated islands.

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