Stepwise Two-Photon-Induced Fast Photoswitching via Electron Transfer in Higher Excited States of Photochromic Imidazole Dimer

2016 ◽  
Vol 138 (18) ◽  
pp. 5930-5938 ◽  
Author(s):  
Yoichi Kobayashi ◽  
Tetsuro Katayama ◽  
Takuya Yamane ◽  
Kenji Setoura ◽  
Syoji Ito ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited States ◽  
Two Photon ◽  
Higher Excited States

Stepwise Two-Photon-Induced Electron Transfer from Higher Excited States of Noncovalently Bound Porphyrin-CdS/ZnS Core/Shell Nanocrystals

2018 ◽  
Vol 9 (24) ◽  
pp. 7098-7104 ◽  
Author(s):  
Takuma Uno ◽  
Masafumi Koga ◽  
Hikaru Sotome ◽  
Hiroshi Miyasaka ◽  
Naoto Tamai ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited States ◽  
Core Shell ◽  
Two Photon ◽  
Higher Excited States

Cycloreversion Reaction of a Fulgide Derivative in Higher Excited States Attained by Femtosecond Two-Photon Pulsed Excitation

2018 ◽  
Vol 122 (43) ◽  
pp. 24987-24995 ◽  
Author(s):  
Tatsuhiro Nagasaka ◽  
Hikaru Sotome ◽  
Yuma Yoshida ◽  
Yasushi Yokoyama ◽  
Hiroshi Miyasaka
Keyword(s):  
Excited States ◽  
Pulsed Excitation ◽  
Two Photon ◽  
Higher Excited States

Efficient Cycloreversion Reaction of a Diarylethene Derivative in Higher Excited States Attained by Off-Resonant Simultaneous Two-Photon Absorption

2017 ◽  
Vol 8 (14) ◽  
pp. 3272-3276 ◽  
Author(s):  
Hikaru Sotome ◽  
Tatsuhiro Nagasaka ◽  
Kanako Une ◽  
Chiaki Okui ◽  
Yukihide Ishibashi ◽  
...  
Keyword(s):  
Excited States ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Higher Excited States

Photochemical and photophysical behaviour of porphyrins and phthalocyanines irradiated with violet or ultraviolet light

2001 ◽  
Vol 05 (01) ◽  
pp. 77-86 ◽  
Author(s):  
KATSUMI TOKUMARU
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited States ◽  
Ultraviolet Light ◽  
Recent Progress ◽  
Femtosecond Spectroscopy ◽  
Transfer Energy ◽  
Absorption Bands ◽  
Characteristic Emission ◽  
Higher Excited States

Photochemical irradiation of porphyrins or phthalocyanines with violet or ultraviolet light absorbed by their second or higher absorption bands populates their higher excited states. These higher excited states generally dissipate very rapidly, but, competing with such rapid deactivation, often show unique behaviour different from the lowest excited states populated under visible light irradiation of the first absorption band, namely wavelength-dependent reactions or emission. The higher excited states often exhibit characteristic emission and enhanced reactivity in electron transfer, energy transfer and so on, competing with rapid deactivation. This paper attempts to summarize our work, perfomed particularly by means of femtosecond spectroscopy, and recent progress in this area.

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