Triplett-sensibilisierte Photoreaktionen von Azobenzol in schwefelsaurer Lösung / Triplet-sensitized Photoreaction of Azobenzene in Sulphuric Acid

1981 ◽  
Vol 36 (11) ◽  
pp. 1180-1186 ◽  
Author(s):  
Hermann Rau ◽  
Alan D. Crosby ◽  
Alan D. Crosby ◽  
Rudolf Frank
Keyword(s):  
Sulphuric Acid ◽  
Electron Acceptor ◽  
Thermally Induced ◽  
Photostationary State ◽  
Trans Isomerization ◽  
Azo Group ◽  
Kinetics Of

The kinetics of the thermally induced cis-trans-isomerization of protonated azobenzene de­pend upon the amount of acid in a mixed H2SO4-H2O-solvent. This is rationalized by the assumption of a doubly protonated azobenzene molecule as an intermediate. Triplet sensitization of protonated azobenzene in 73% sulphuric acid (by weight) leads to cis-trans-isomerization and a photostationary state. This is similar to stilbene. With 1-aminonaphthalene as a sensitizer a photoreduction and cleavage of the azo group is an alternative reaction. It is shown that the cis-azobenzene molecule is the electron acceptor and that the photoreduction can be quenched by the addition of oxygen.

Solvent and viscosity effect on the kinetics of the thermal cis-trans isomerization of 3'-nitro-4-diethylaminoazobenzene

1989 ◽  
Vol 11 (3) ◽  
pp. 179-189 ◽  
Author(s):  
Bruno Marcandalli ◽  
Pier Luigi Beltrame ◽  
Ernestina Dubini-Paglia ◽  
Alberto Seves
Keyword(s):  
Viscosity Effect ◽  
Trans Isomerization ◽  
Kinetics Of

Kinetics of the Thermally-Induced Structural Rearrangement of γ-MnO2

2014 ◽  
Vol 118 (42) ◽  
pp. 24257-24265 ◽  
Author(s):  
Wesley M. Dose ◽  
Neeraj Sharma ◽  
Nathan A. S. Webster ◽  
Vanessa K. Peterson ◽  
Scott W. Donne
Keyword(s):  
Structural Rearrangement ◽  
Thermally Induced ◽  
Kinetics Of

KINETICS OF A THERMAL CIS-TRANS ISOMERIZATION. II

1932 ◽  
Vol 54 (6) ◽  
pp. 2208-2215 ◽  
Author(s):  
M. Nelles ◽  
G. B. Kistiakowsky
Keyword(s):  
Trans Isomerization ◽  
Kinetics Of

The kinetics of thermally induced isomerisation of trilinolenin, an improved gas chromatography study

2017 ◽  
Vol 52 (7) ◽  
pp. 1543-1551 ◽  
Author(s):  
Fan Jiang ◽  
Qin Guo ◽  
Qingpeng Li ◽  
Jing Jin ◽  
Yiming Ha
Keyword(s):  
Gas Chromatography ◽  
Thermally Induced ◽  
Kinetics Of

Photochemical cis-trans Isomerization of 2-Substituted 9-(2-Nitroethenyl)anthracenes. X-Ray Structure Analyses of (E)- and (Z)-9-(2-Nitro-2-phenylethenyl)anthracene

1989 ◽  
Vol 42 (4) ◽  
pp. 593 ◽  
Author(s):  
HD Becker ◽  
BW Skelton ◽  
H Sorensen ◽  
AH White
Keyword(s):  
Single Crystal ◽  
Quantum Yields ◽  
X Ray Diffraction ◽  
X Ray ◽  
Photostationary State ◽  
Trans Isomerization ◽  
Photochemical Isomerization

(E)-9-(2-Nitropropeny1)anthracene and (E)-9-(2-nitro-2-phenylethenyl)anthracene have been prepared by piperidine-catalysed condensation of 9-anthraldehyde with nitroethane and nitro(phenyl)methane, respectively. The corresponding (Z)-compounds were obtained by photochemical isomerization, quantum yields of geometrical isomerlzation being measured in cyclohexane, benzene, dichloromethane and ethanol. In virtually all solvents the (Z)-isomers are favoured at the photostationary state. The structures of (E)- and (2)-942- nitro-2-phenylethenyl)anthracene have been established by single-crystal X-ray diffraction studies.

The kinetics of corrosion of e-glass fibres in sulphuric acid

2010 ◽  
Vol 356 (44-49) ◽  
pp. 2433-2436 ◽  
Author(s):  
R.L. Jones ◽  
J. Stewart
Keyword(s):  
Sulphuric Acid ◽  
Glass Fibres ◽  
Kinetics Of

Kinetics of thermally-induced conformational transitions in soybean protein films

Polymer ◽  
2010 ◽  
Vol 51 (11) ◽  
pp. 2410-2416 ◽  
Author(s):  
Kun Tian ◽  
David Porter ◽  
Jinrong Yao ◽  
Zhengzhong Shao ◽  
Xin Chen
Keyword(s):  
Soybean Protein ◽  
Conformational Transitions ◽  
Protein Films ◽  
Thermally Induced ◽  
Kinetics Of

scholarly journals The Effect of Proline cis-trans Isomerization on the Folding of the C-Terminal SH2 Domain from p85

2019 ◽  
Vol 21 (1) ◽  
pp. 125
Author(s):  
Francesca Troilo ◽  
Francesca Malagrinò ◽  
Lorenzo Visconti ◽  
Angelo Toto ◽  
Stefano Gianni
Keyword(s):  
Protein Interactions ◽  
Specific Interaction ◽  
Sh2 Domain ◽  
Regulatory Subunit ◽  
Wild Type ◽  
Protein Protein Interactions ◽  
Sh2 Domains ◽  
Trans Isomerization ◽  
A Site ◽  
Kinetics Of

SH2 domains are protein domains that modulate protein–protein interactions through a specific interaction with sequences containing phosphorylated tyrosines. In this work, we analyze the folding pathway of the C-terminal SH2 domain of the p85 regulatory subunit of the protein PI3K, which presents a proline residue in a cis configuration in the loop between the βE and βF strands. By employing single and double jump folding and unfolding experiments, we demonstrate the presence of an on-pathway intermediate that transiently accumulates during (un)folding. By comparing the kinetics of folding of the wild-type protein to that of a site-directed variant of C-SH2 in which the proline was replaced with an alanine, we demonstrate that this intermediate is dictated by the peptidyl prolyl cis-trans isomerization. The results are discussed in the light of previous work on the effect of peptidyl prolyl cis-trans isomerization on folding events.

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