1998(Apr~)
- INTERNATIONAL MEETING
- E1998 Asian-Pacific Forum on Science and
Technology(Poster)
- "Photochemical Reactions via Hot Molecules"
- Tomoyuki YATSUHASHI, Tsuyoshi AKIHO, Seiji Shimizu, Nobuaki NAKASHIMA
- (JAIST, Nov 10-13)
- @Hot Molecule which is in a highly vibrationally
excited state, plays an important role in UV photochemistry as
an intermediate in both single and multiphoton reactions. Hot
molecules have very high equivalent temperature around 2000-4000K
and a narrow initial energy distribution. Photochemical reactions
via hot molecules were explored by a laser flash photolysis in
the gas phase using VUV lasers.
- A review of hot moleucle chemistry
in our laboratory.
- DOMESTIC MEETING
- „Hikari Kagaku Touronkai (Poster)
- "Photoreaction of Acid Anhydride by ArF
Excimer Laser Irradiation"
- Tomoyuki YATSUHASHI, Nobuaki NAKASHIMA
- (Tokyo Metropolitan Univ. Sep28-30)
- The laser flash photolysis of gas phase phthalic
anhydride using ArF laser results in the formation of benzyne
and subsequently of biphenylene. The transient decay profiles
were greatly affected by the concentration of phthalic anhydride
and inert gas pressure. The products formation was accelerated
at the high concentration of phthalic anhydride, while it was
suppressed in the presence of nitrogen. All the results indicated
that benzyne was formed after the fast decarboxylation and decarbonylation
of hot phthalic anhydride, a highly vibrationally excited ground
state. The hot molecule mechanism on the formation of benzyne
from phthalic anhydride was confirmed.
- See more details: J. Phys.
Chem. A 2000, 104 (2), 203-208.