Ernsting, N. P. and Dick, Bernhard and Arthen-Engeland, T.
The primary photochemical reaction step of unsubstituted indolino-spiropyrans.
Pure and Applied Chemistry 62 (8), pp. 1483-1488.
The photochem. ring-opening of unsubstituted indolino-spiropyrans to the corresponding merocyanines in pentane, was followed by transient absorption spectroscopy. The temporal resoln. was better than 0.4 ps. During the pump pulse, an ultrafast unstructured absorption covered the entire measurement range 380-680 nm. From it emerged the structured absorption spectrum of a 1st merocyanine isomer, with typical time consts. in the range 0.9-1.4 ps. The transient merocyanine spectra are compared to the spectra which are obtained when the spiropyrans are irradiated at low temp. in argon. In conjunction with semiempirical calcns., the 1st merocyanine isomer is assigned a trans-trans-cis structure.
|Additional information (public):||CAN 113:181179
Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes
2016-67-3; 51870-76-9 Role: USES (Uses) (MNDO calcns. of, in ground state, primary photochem. processes of photochromic indolino-spiropyrans in relation to); 1485-92-3; 1592-43-4 Role: RCT (Reactant), RACT (Reactant or reagent) (photochem. reactions of, primary processes in)|
|Institutions:|| Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Light and Matter) > Prof. Dr. Bernhard Dick |
|Keywords:||Photochromism (of indolino-spiropyrans, primary photochem. reactions in);
Ultraviolet and visible spectra (of transient products, in primary processes of photolysis of indolino-spiropyrans);
Photolysis (laser-induced, of unsubstituted indolino-spiropyrans, primary processes in);
photolysis indolino spiropyran merocyanine formation;
photochromism indolino spiropyran|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||No|
|Deposited On:||19 Jan 2009 16:17|
|Last Modified:||18 Jan 2012 14:30|