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Intersystem crossing in photosynthetic pigments

โœ Scribed by Michael K. Bowman


Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
408 KB
Volume
48
Category
Article
ISSN
0009-2614

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โœฆ Synopsis


Intersystem crossing (ISC) of chlorophyll a in solution exhibits a strong solvent dependence and a weak deuterium isatope effect. This is due to the importance of the molecular geometry in promoting ISC. These results are generalized to other closely related photosynthetic pigments


๐Ÿ“œ SIMILAR VOLUMES


Intersystem crossing in methylene
โœ Thomas W. Eder; Robert W. Carr Jr.; John W. Koenst ๐Ÿ“‚ Article ๐Ÿ“… 1969 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 258 KB
Intersystem crossing in methylene
โœ Tai Yup Chang; Harold Basch ๐Ÿ“‚ Article ๐Ÿ“… 1970 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 283 KB

Singlet-triplet intersystem crossing in methylene is considered as a two step process: (a) reversible intramolecular equilibration of singlet and triplet species. and @) collisional deactivation of the vibrationally excited triplet state. The overall process is predicted to be bimolecular. in ngree

Intersystem crossing in anthracene
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A temperature dependent intersystem crossing rate is observed below ca. 170ยฐK for anthracene in methyl tetrahydrofuran. From the temperature dependence of the 0.0 bands in absorption and emission, this is interpreted as being due to slow lattice relaxation in the excited singlet state.

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## Magnetic fieid dependence curves are presented for the t3C CIDNP signals resulting from photol>sis of ?-phenqlc~clo-&-ones in cyclohcxane. One of the three biradicakleriwd products, the trapped ketene, reverses its polarization at high field. This is interpreted in terms of a competition betwee