Main Title |
Photochemical Reduction of Zn-Etioporphyrin in Frozen Solutions; Structure of Reduced Forms (Fotokhimicheskoe Vosstanovlenie Zn-Etioporfirina v Zamorozhennykh Rastvorakh. Struktura Vosstanovlennykh Form). |
Author |
Sidorov., A. N. ;
|
CORP Author |
Environmental Protection Agency, Research Triangle Park, N.C. Translation Services Section. |
Year Published |
1973 |
Report Number |
EPA-TR-74-35; |
Stock Number |
PB-259 681-T |
Additional Subjects |
Photochemical reactions ;
Metal complexes ;
Porphyrins ;
Zinc organic compounds ;
Solutions ;
Spectrochemical analysis ;
Thermochemistry ;
Low temperature research ;
Molecular structures ;
Reduction(Chemistry) ;
Translations ;
USSR ;
Etioporphyrins
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-259 681-T |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
12p |
Abstract |
It has been found that solutions of Zn-etioporphyrin in N-containing organic bases (lutidine, N-methylpiperidine, triethylamine), frozen at -196C, are capable of photochemical conversions. Comparison of the properties and spectral characteristics of the photoproducts formed with properties of protonated Zn-etioporphyrin dianions, produced by chemical methods, permits the following scheme to be proposed for conversion of Zn-etioporphyrin in organic bases (P, Zn-etioporphyrin molecule; D, molecule of base, which is both an electron donor and a proton donor to the P molecule). The first stage observable spectrally is photoreduction in the frozen solution. The hydroderivative formed in frozen solution is capable of again splitting off a proton during irradiation. Thermal addition of a proton to the PH(-) and its subsequent photocleavage in frozen solution can be reproduced repeatedly in one and the same sample. The central metal atom has a significant effect on the photochemical behavior of a methyl-porphyrin in solution. |
Supplementary Notes |
Trans. of Biofizika (USSR) v18 p144-148 Jan-Feb 73. |
Title Annotations |
+++Photochemical Reduction of Zn-Etioporphyrin in Frozen Solutions; Structure of Reduced Forms (Fotokhimicheskoe Vosstanovlenie Zn-Etioporfirina v Zamorozhennykh Rastvorakh. Struktura Vosstanovlennykh Form)--Translation. |
PUB Date Free Form |
1973 |
Category Codes |
7E; 99E |
NTIS Prices |
PC A02/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
323703649 |
Origin |
NTIS |
Type |
CAT |