Photochromic transformations of cymantrenyl amides

2013 ◽  
Vol 62 (9) ◽  
pp. 2083-2085 ◽  
Author(s):  
E. S. Kelbysheva ◽  
L. N. Telegina ◽  
I. A. Godovikov ◽  
T. V. Strelkova ◽  
M. G. Ezernitskaya ◽  
...  
Keyword(s):  
Photochromic Transformations

scholarly journals Photoinitiated azo-hydrazo tautomerizm of 1-p- toluenesulphonylazo-2,4,6,8-tetrakis (tert-butyl)phenoxazine

1999 ◽  
Vol 1 (3) ◽  
pp. 161-164
Author(s):  
T. E. Ivakhnenko ◽  
N. I. Makarova ◽  
E. P. Ivakhnenko ◽  
V. I. Minkin ◽  
M. I. Knyazhansky
Keyword(s):  
Photochromic Compound ◽  
Tert Butyl ◽  
Photochromic Transformations ◽  
Photochemical Properties ◽  
Model Structures

A novel photochromic compound with NH-N intramolecular H-bond (1-p-toluenesulphonylazo- 2,4,6,8-tetrakis(tert-butyl)phenoxazine) and the corresponding model structures (1-oxo-2,4,6,8-tetrakis(tertbutyl) phenoxazine, 2,4,5,7-tetrakis (tert-butyl )-1-( veratroylazo ) phenoxazine, 2,4,5,7-tetrakis ( tert-butyl )-Nacetyl- 1-(p-toluenesulphonylazo)phenoxazine) have been synthesized and their spectral and photochemical properties are studied. The photochromic transformations observed are found to be conditioned by ESIPT (as a primary step) followed by E-Z isomerisation about N–N-bond.

The mechanisms of photochromic transformations of 2-indolylfulgides

2000 ◽  
Vol 49 (6) ◽  
pp. 1020-1023 ◽  
Author(s):  
O. Yu. Fedorovsky ◽  
V. L. Ivanov ◽  
B. M. Uzhinov
Keyword(s):  
Photochromic Transformations

Spectrokinetic study of photochromic transformations of spironaphthopyran metal complexes

2011 ◽  
Vol 5 (3) ◽  
pp. 461-464 ◽  
Author(s):  
L. D. Popov ◽  
I. N. Shcherbakov ◽  
V. A. Kogan ◽  
V. Z. Shirinyan ◽  
M. M. Krayushkin ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Photochromic Transformations

scholarly journals Spiropyran salts and their neutral precursors: synthesis, crystal structure, photochromic transformations in solutions and solid state

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
E.A. Yurieva ◽  
S.M. Aldoshin
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Pyridine Ring ◽  
Photochromic Properties ◽  
X Ray ◽  
Photochromic Transformations ◽  
The Relationship

AbstractThis review covers investigations of spiropyran iodides with N-substituted indoline fragment, and with the pyran cycle being annelated to N-methylated pyridine ring. The schemes of synthesis of iodides and their neutral precursors, as well as results of X-ray analysis and photochemical study of the crystals of the obtained compounds are presented. Based on our and literature data, the relationship between the structure and photochromic properties has been discussed for a series of salts and neutral pyridospiropyrans.

scholarly journals Spirooxazine Photoisomerization and Relaxation in Polymer Matrices

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Maria Larkowska ◽  
Michael Wuebbenhorst ◽  
Stanislaw Kucharski
Keyword(s):  
Activation Energy ◽  
Photochemical Reaction ◽  
Arrhenius Plot ◽  
Thermal Relaxation ◽  
Rheological Behaviour ◽  
Kinetic Studies ◽  
Polymer Matrices ◽  
Butyl Methacrylate ◽  
Photochromic Transformations ◽  
Uv Lamp

9′-Hydroxy-1,3,3-trimethylspiro[indoline-2,3′[3H]naphtha[2,1-b]-1,4oxazine] (SPO-7OH) was used in studies of photochromic transformations in polymer matrices. Illumination with UV lamp caused opening the spirostructure of the oxazine with formation of open merocyanine species absorbing at ca. 610 nm. The kinetic studies of thermal relaxation of the open form showed that this process can be described with a biexponential function including both photochemical reaction and rheological behaviour of the polymeric environment. Basing on Arrhenius plot of the rate constant ascribed to the photochemical reaction, the activation energy was determined, which was 66.1 and 84.7 kJ/mole for poly(methyl methacrylate-co-butyl methacrylate) and poly(vinylpyrrolidone) matrix, respectively.

Mechanism of photochromic transformations and photodegradation of an asymmetrical 2,3-diarylcyclopentenone

2020 ◽  
Vol 22 (9) ◽  
pp. 5220-5228 ◽  
Author(s):  
Maria V. Oplachko ◽  
Artem B. Smolentsev ◽  
Ilya M. Magin ◽  
Ivan P. Pozdnyakov ◽  
Vladislav A. Nichiporenko ◽  
...  
Keyword(s):  
Mechanistic Study ◽  
Photochromic Properties ◽  
Photochromic Transformations

The mechanistic study of photochromic properties and photodegradation of an asymmetrical 2,3-diarylcyclopentenone bearing thiophene and benzothiophene units has been performed.

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