✦ LIBER ✦

Photosensitized triplet state of 1,3-cyclodienes detected by a time-resolved ESR method

✍ Scribed by Akiko Hanazaki; Hisao Murai; Keiji Kuwata

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 381 KB
Volume: 197
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)86023-b

No coin nor oath required. For personal study only.

✦ Synopsis

The excited triplet states of 1,3-cyclodienes produced by photosensitization are studied by time-resolved ESR at 77 K. The zerofield splitting (ZFS) constants of 1,3-cyclodienes are influenced by the change of the molecular framework. Simple Hiickel MO calculation provides qualitative aspects of ZFS constants against the twisting in conjugated parts of dienes.

📜 SIMILAR VOLUMES

Photosensitized triplet state of stilben

Photosensitized triplet state of stilbene detected by a time-resolved ESR method

✍ Hisao Murai; Yoshinori Yamamoto; Yasumasa J. I'Haya 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 362 KB

The spin-polarized excited triplet state of stilbene formed by the photosensitization in a mice&u aggregate, which was employed as an efficient reaction field, has been detected by a time-resolved ESR technique. Both trans-and cis-stilbene provided triplet states having nearly identical zfs constant

Effects of protonation and coordination

Effects of protonation and coordination to zinc(II) ion on the triplet state of 2,2′-biquinoline: A time-resolved ESR study

✍ Mikio Yagi; Akira Saitoh; Keiichi Takano; Kazuhiro Suzuki; Jiro Higuchi 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 293 KB

Dynamics of a liquid crystal molecule at

Dynamics of a liquid crystal molecule at a solid-liquid interface detected by the time-resolved transient grating method

✍ Masahide Terazima; Yasuhiro Kojima; Noboru Hirota 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 478 KB

Dynamics of MBBA (N-(4-methoxybenzylidene)-4-n-butylaniline) in ethanol at a liquid-solid interface is selectively detected using the transient grating method with total internal reflection for probe light. The thermal grating signal decays much faster than that in bulk liquid. This faster decay is

The effects of conformation and coordina

The effects of conformation and coordination to zinc(II) ions on the lowest triplet state of 6,6′-dimethyl-2,2′-bipyridine: A time-resolved ESR study

✍ Mikio Yagi; Hayato Shirai; Jun Ohta; Jiro Higuchi 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 328 KB

Time-resolved ESR spectra have been observed for the lowest triplet states of s-transd,b'dimethyl-2,2'-bipyridine (s-transdmbpy), metal-free s-cis-dmbpy and [Zn(dmbpy) I'+ in rigid solutions at 77 K. The results indicate that, following the conformational change of dmbpy, the sublevel initially popu

The quantum yield of triplet formation a

The quantum yield of triplet formation and triplet lifetime in the solid phase by a time-resolved thermal lens method. Application to pyridazine

✍ Masahide Terazima; Tohru Azumi 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 274 KB

The time-resolved thermal lens technique is used to measure quantum yields of triplet formation and triplet lifetime in the solid phase at low temperature. The time dependence of the thermal lens signal of pyridazine in the solid phase is very different from that in a fluid medium. These results are

Time-resolved two-step excitation therma

Time-resolved two-step excitation thermal grating method. Measurement of the quantum yield of energy transfer from a higher excited triplet state

✍ Masahide Terazima; Noboru Hirota 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 469 KB

Triplet-triplet absorption is sensitively detected by the time-resolved two-step excitation thermal grating method. This method provides zero-background detection of the transient absorption. As an example of the application, measurement of the quantum yield of energy transfer from the higher excite