✦ LIBER ✦

Laser photolysis studies of photochromic processes in spirooxazines: solvent effects on photomerocyanine behavior

✍ Scribed by C. Bohne; M.G. Fan; Z.J. Li; Y.C. Liang; J. Lusztyk; J.C. Scaiano

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 894 KB
Volume: 66
Category: Article
ISSN: 1010-6030
DOI: 10.1016/1010-6030(92)85121-a

No coin nor oath required. For personal study only.

✦ Synopsis

The photochemistry of spirooxazines I and II was examined using laser flash photolysis techniques. Both compounds lead to the formation of a strongly absorbing and long-lived, ring-opened photomerocyanine (PMC). In non-polar solvents the PMCs undergo photoisomerization induced by visible light irradiation which ultimately regenerates the starting materials. In the case of II an additional transient (believed to be a charge-transfer intermediate) is also formed. In spite of the rich transient phenomena observed, no new products were detected even after extensive laser irradiation. The remarkable fatigue resistance of these compounds makes them excellent candidates for commercial applications.

📜 SIMILAR VOLUMES

Nanosecond laser photolysis studies of p

Nanosecond laser photolysis studies of photochromic processes in pyrryl fulgides

✍ Lianhe Yu; Yangfu Ming; Xinyu Zhang; Meigong Fan; Nianyun Lin; Side Yao 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 512 KB

Primary processes in the photochromism o

Primary processes in the photochromism of a sterically crowded piperidinospiropyran studied by nanosecond laser photolysis

✍ A. Kellmann; L. Lindqvist; S. Monti; F. Tfibel; R. Guglielmetti 📂 Article 📅 1985 🏛 Elsevier Science ⚖ 877 KB

Picosecond laser photolysis studies on p

Picosecond laser photolysis studies on photochromic reactions of 1,2-bis(2,4,5-trimethyl-3-thienyl)maleic anhydride in solutions

✍ Hiroshi Miyasaka; Shigeru Araki; Akihiro Tabata; Takahiro Nobuto; Noboru Malaga; 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 636 KB

Picosecond laser photolysis and transient absorption spectroscopy were applied to the direct observation of the photochromic reactions, such as ring-closure and ring-opening processes, of 1,2-bis(2,4,5-trimethyl-3-thienyl)maleic anhydride in solutions. Both in the ring-closure and the ring-opening

Laser photolysis studies on competing pr

Laser photolysis studies on competing processes of ionic dissociation and hydrogen abstraction in benzophenone-N,N-diethylaniline system

✍ Satoshi Arimitsu; Hiroshi Masuhara 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 309 KB

Laser flash photolysis studies of magnet

Laser flash photolysis studies of magnetic field effects on the hydrogen abstraction reaction of quinoline in micellar solution

✍ Yoshifumi Tanimoto; Seiji Takase; Chikako Jinda; Misako Kyotani; Michiya Itoh 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 608 KB

Laser flash photolysis studies on the in

Laser flash photolysis studies on the induced-quenching process competing with hydrogen atom abstraction of triplet benzophenone. Heavy atom effect

✍ Katsuji Okada; Minoru Yamaji; Haruo Shizuka 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 315 KB

The rate constants (kHA and klQ) for the hydrogen atom abstraction (HA) and induced-quenching (IQ) processes between triplet benzophenone (3Bp \*) and halogenated toluenes (XTL) were determined by means of nanosecond laser flash photolysis techniques. It was found that the klQ value increased propor