✦ LIBER ✦

Intersystem crossing in methylene

✍ Scribed by Tai Yup Chang; Harold Basch

Publisher: Elsevier Science
Year: 1970
Tongue: English
Weight: 283 KB
Volume: 5
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(70)80026-4

No coin nor oath required. For personal study only.

✦ Synopsis

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 ngreement with the experimental observation of Eder et al.

It is believed that the ground electronic state of CH2 is a linear triplet state (3s;$ [I]. In many photochemical reactions, however, because of spin conservation, CH2 is first formed in a bent singlet state (lA1) from which it relaxes relatively slowly into the triplet ground state. Although

📜 SIMILAR VOLUMES

Intersystem crossing in methylene

✍ Thomas W. Eder; Robert W. Carr Jr.; John W. Koenst 📂 Article 📅 1969 🏛 Elsevier Science 🌐 English ⚖ 258 KB

Intersystem crossing in anthracene

✍ T.F. Hunter; R.F. Wyatt 📂 Article 📅 1970 🏛 Elsevier Science 🌐 English ⚖ 299 KB

A temperature dependent intersystem crossing rate is observed below ca. 170°K 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.

Intersystem crossing in molecular dimers

✍ Michael K. Bowman; James R. Norris 📂 Article 📅 1978 🏛 Elsevier Science 🌐 English ⚖ 273 KB

## Intersystem crossing in molecular pairs IS examined in relatron to the structure oi the pair. Simple rclationshlps are derived which differ from previously reported ones by the inclusion of the vrbronic nature of intcrcy\tcm cro\ring.

Intersystem crossing in the helicenes

✍ M. Sapir; E.Vander Donckt 📂 Article 📅 1975 🏛 Elsevier Science 🌐 English ⚖ 322 KB

Intersystem crossing in photosynthetic p

Intersystem crossing in photosynthetic pigments

✍ Michael K. Bowman 📂 Article 📅 1977 🏛 Elsevier Science 🌐 English ⚖ 408 KB

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

CIDNP and intersystem crossing in biradi

CIDNP and intersystem crossing in biradicals

✍ Charles Doubleday Jr. 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 374 KB

## 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