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1

Effect of water concentration on photoreduction of anthraquinone-2-sulfonate by 2-propanol in aqueous acetonitrile solution

Wakisaka, Akihiro., Ebbesen, Thomas W., Sakuragi, Hirochika., Tokumaru, Katsumi.

Journal:

Journal of Physical Chemistry

Year:

1987

Language:

english

File:

PDF, 613 KB

english, 1987

2

Thiapyrylium salt-sensitized electron transfer reactions of trans-stilbene. Dimerization and oxygenation

Ryoichi Akaba, Masaki Kamata, Akiko Koike, Ken-Ichi Mogi, Yasunao Kuriyama, Hirochika Sakuragi

Journal:

Journal of Physical Organic Chemistry

Year:

1997

Language:

english

File:

PDF, 151 KB

english, 1997

3

ChemInform Abstract: Behavior of Biradicals Generated from a Norrish Type-I Reaction of 2,2-Diphenylcycloalkanones. Chain-Length Dependence and Magnetic Field Effects.

Itsuko Suzuki, Ryoko Tanaka, Akinori Yamaguchi, Shin-ichiro Maki, Hiroaki Misawa, Katsumi Tokumaru, Ryoichi Nakagaki, Hirochika Sakuragi

Journal:

Year:

1999

File:

PDF, 30 KB

1999

4

Conformations of the triplet state of aromatic olefins. Observation of the transoid triplet states of 3,3-dimethyl-1-(2-naphthyl)-1-butene and 3,4-dihydrophenanthrene as a rigid planar triplet model

Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru, Yoshio Sakaguchi, Junko Nakamura, Hisaharu Hayashi

Journal:

Chemical Physics Letters

Year:

1983

Language:

english

File:

PDF, 480 KB

english, 1983

5

New insight into “one-way” photoisomerization of anthrylethylenes: absorption spectra of the trans triplets as intermediates of the isomerization

Takashi Karatsu, Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Chemical Physics Letters

Year:

1985

Language:

english

File:

PDF, 641 KB

english, 1985

6

Mechanism for photoisomerization of an olefin in the presence of electron acceptors as studied by magnetic field effects

Hirochika Sakuragi, Ryoichi Nakagaki, Takahisa Oguchi, Tatsuo Arai, Katsumi Tokumaru, Saburo Nagakura

Journal:

Chemical Physics Letters

Year:

1987

Language:

english

File:

PDF, 479 KB

english, 1987

7

Triplet energy surfaces of one-way isomerizing olefins as studied by singlet oxygen luminescence technique

Tatsuo Arai, Takashi Karatsu, Masahiro Tsuchiya, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Chemical Physics Letters

Year:

1988

Language:

english

File:

PDF, 483 KB

english, 1988

8

Factors distinguishing one-way and two-way photoisomerization of aromatic olefins. Effects of substituents on triplet energy surfaces of 8-fluoranthenylethylenes

Hideo Furuuchi, Tatsuo Arai, Yasunao Kuriyama, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Chemical Physics Letters

Year:

1989

Language:

english

File:

PDF, 454 KB

english, 1989

9

Mechanism for photoisomerization of 1-styrylpyrene. Finding of a novel type of triplet energy surface with two decay funnels

Tatsuo Arai, Hiroaki Okamoto, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Chemical Physics Letters

Year:

1989

Language:

english

File:

PDF, 359 KB

english, 1989

10

Spectroscopic evidence for an energy minimum at the cis geometry of the triplet state of a butenylanthracene. Further insight into across-a-ridge isomerization of anthrylethylenes

Takashi Karatsu, Masami Tsuchiya, Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Chemical Physics Letters

Year:

1990

Language:

english

File:

PDF, 502 KB

english, 1990

11

Detection of dimeric radical cations of trans-stilbene in 2,4,6-triphenylpyrylium tetrafluoroborate-sensitized electron transfer reactions in dichloromethane

Ryoichi Akaba, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Chemical Physics Letters

Year:

1990

Language:

english

File:

PDF, 414 KB

english, 1990

12

Inefficient “one-way” isomerization of cis-styrylferrocene. Suppression of cis—trans isomerization by heavy-atom-induced intersystem crossing

Tatsuo Arai, Yasushi Ogawa, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Chemical Physics Letters

Year:

1992

Language:

english

File:

PDF, 411 KB

english, 1992

13

Pulsed laser photolysis of bis(2-bromobenzoyl) peroxide. Structure of 2-bromobenzoyloxyl radicals and carbon-bromine bond cleavage

Jun Wang, Hiroki Itoh, Masahiro Tsuchiya, Katsumi Tokumaru, Hirochika Sakuragi, Masamoto Iwaizumi, Seigo Yamauchi

Journal:

Chemical Physics Letters

Year:

1995

Language:

english

File:

PDF, 372 KB

english, 1995

14

Electron transfer reaction from zinc(II)tetraphenylporphine to dichloromethane

Noriyuki Kishii, Katsuya Shirai, Shin-ichiro Tamura, Jun'etsu Seto, Katsumi Tokumaru, Satohiro Takagi, Tatsuo Arai, Hirochika Sakuragi

Journal:

Journal of Luminescence

Year:

1995

Language:

english

File:

PDF, 418 KB

english, 1995

15

Structural and solvent effects upon decarboxylation of 2,6-disubstituted benzoyloxyl radicals. A laser flash photolysis study of bis(2,6-disubstituted-benzoyl) peroxides

Jun Wang, Hiroki Itoh, Masahiro Tsuchiya, Katsumi Tokumaru, Hirochika Sakuragi

Journal:

Year:

1995

Language:

english

File:

PDF, 769 KB

english, 1995

16

Mechanism for Photodecomposition of Naphtho[1,8-de][1,3] dithiin-1-bis(ethoxycarbonyl)methylides

Takayoshi Fujii, Hirochika Sakuragi, Naomichi Furukawa

Journal:

Tetrahedron Letters

Year:

1995

Language:

english

File:

PDF, 239 KB

english, 1995

17

Mechanism for triplet-sensitized isomerization of aromatic olefins

Tatsuo Arai, Takashi Karatsu, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Journal of Photochemistry

Year:

1981

Language:

english

File:

PDF, 79 KB

english, 1981

18

Quenching of excited singlet states by dibenzoyl peroxide and tert-butyl peroxybenzoate

Toshiyuki Urano, Akihide Kitamura, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Journal of Photochemistry

Year:

1984

Language:

english

File:

PDF, 365 KB

english, 1984

19

Mechanism for quenching of triplet excited sensitizers by diaroyl peroxides

Shigeru Takahara, Hirochika Sakuragi, Katsumi Tokumaru, Akihide Kitamura, Akira Shiga

Journal:

Journal of Photochemistry

Year:

1985

Language:

english

File:

PDF, 483 KB

english, 1985

20

A new “one-way”-photoisomerizing aromatic olefin: the effect of a fluoranthenyl group on the triplet energy surface

Tatsuo Arai, Yasunao Kuriyama, Takashi Karatsu, Hirochika Sakuragi, Katsumi Tokumaru, Shigero Oishi

Journal:

Journal of Photochemistry

Year:

1987

Language:

english

File:

PDF, 455 KB

english, 1987

21

Photosensitized cis—trans isomerization of stilbene via cation radical mechanism in micellar solution

Igor K. Lednev, Michael V. Alfimov, Yasunao Kuriyama, Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1992

Language:

english

File:

PDF, 682 KB

english, 1992

22

UV light and red light chemistry of metallophthalocyanine: wavelength-dependent photochemical reduction of tetrasodium salts of Zn(II) and Cu(II) tetrasulphonatophthalocyanines with amines

Yuji Kaneko, Yoshinobu Nishimura, Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru, Daisaku Matsunaga

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1995

Language:

english

File:

PDF, 658 KB

english, 1995

23

Structural effects on the reactivity for decarboxylation and absorption of aroyloxyl radicals generated by laser photolysis of diaroyl peroxides

Wang Jun, Tateno Toshiyuki, Sakuragi Hirochika, Katsumi Tokumaru

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1995

Language:

english

File:

PDF, 537 KB

english, 1995

24

Effect of excitation wavelength on photoreduction of metal-free and copper(II) 1,4,8,11,15,18,22,25-octabutoxyphthalocyanines with triethanolamine

Yuji Kaneko, Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru, Chyongjin Pac

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1996

Language:

english

File:

PDF, 693 KB

english, 1996

25

Observation of formation dynamics of solvated aromatic cation radicals following photoionization

Takakazu Nakabayashi, Satoshi Kamo, Kazuo Watanabe, Hirochika Sakuragi, Nobuyuki Nishi

Journal:

Chemical Physics Letters

Year:

2002

Language:

english

File:

PDF, 311 KB

english, 2002

26

Excitation wavelength dependence of the Z → E one-way isomerization of 4-halostilbene radical cations in excited states

Masashi Waga, Shin-ichiro Maki, Fumiko Hashimoto, Hirochika Sakuragi

Journal:

Chemical Physics Letters

Year:

1997

Language:

english

File:

PDF, 427 KB

english, 1997

27

Photochemical behaviour of poly(vinyl alcohol) bearing p-phenylenediacrylate groups

Toshiki Komatsu, Hirochika Sakuragi, Jun'ichi Nagasawa, Fusae Nakanishi

Journal:

Year:

1998

Language:

english

File:

PDF, 487 KB

english, 1998

28

Mechanistic considerations on photoreaction of organic compounds via excitation of contact charge transfer complexes with oxygen

Kazuyuki Onodera, Gen-ichi Furusawa, Masanobu Kojima, Masahiro Tsuchiya, Shin Aihara, Ryoichi Akaba, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Year:

1985

Language:

english

File:

PDF, 771 KB

english, 1985

29

Solvent and excitation wavelength effects on photocleavage of N-(9-anthroyloxy)-9-fluorenylideneamine as a precursor of 9-anthroyloxyl radicals. A mechanistic study

Yasuo Saitoh, Katsunori Segawa, Hiroki Itoh, Hirochika Sakuragi

Journal:

Tetrahedron Letters

Year:

2000

Language:

english

File:

PDF, 87 KB

english, 2000

30

Photoinduced electron-transfer oxygenation of arylalkanes. Generation and oxygenation pathways of benzylic-type free radicals from the cation radical deprotonation

Ryoichi Akaba, Masaki Kamata, Hiroki Itoh, Akira Nakao, Sakiko Goto, Kei-ichi Saito, Akio Negishi, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Tetrahedron Letters

Year:

1992

Language:

english

File:

PDF, 299 KB

english, 1992

31

Electron transfer between neutral radicals generated from photolysis of diphenylmethyl 1-naphthalenecarboxylate in polar solvents

Fumi Yamaguchi, Yasunao Kuriyama, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Tetrahedron Letters

Year:

1992

Language:

english

File:

PDF, 261 KB

english, 1992

32

Triplet-mediated electron transfer oxygenation of stilbene derivatives with 2,4,6-triphenylpyrylium tetrafluoroborate

Ryoichi Akaba, Kenji Ohshima, Yukinori Kawai, Yukiko Obuchi, Akio Negishi, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 287 KB

english, 1991

33

Semiconductor-catalyzed photooxygenation of aromatic olefins

Tatsuya Kanno, Takahide Oguchi, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Tetrahedron Letters

Year:

1980

Language:

english

File:

PDF, 239 KB

english, 1980

34

Behavior of 2-substituted and 2,6-disubstituted benzoyloxyl radicals. Electronic and steric effects of the substituents

Jun Wang, Masahiro Tsuchiya, Hirochika Sakuragi, Katsumi Tokumaru, Hiroki Itoh

Journal:

Tetrahedron Letters

Year:

1994

Language:

english

File:

PDF, 298 KB

english, 1994

35

SN1-type mechanism for the carbon-carbon bond cleavage of tetrakis(4-methylphenyl)ethanone cation radical. A laser flash photolysis study

Ryoichi Akaba, Masaki Kamata, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Tetrahedron Letters

Year:

1992

Language:

english

File:

PDF, 261 KB

english, 1992

36

Effect of light wavelength on photooxygenation of hexamethylbenzene

Kazuyuki Onodera, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Tetrahedron Letters

Year:

1980

Language:

english

File:

PDF, 140 KB

english, 1980

37

“One-way” photoisomerization between cis- and trans-olefin. A novel adiabatic process in the excited state

Tatsuo Arai, Takashi Karatsu, Hirochika Sakuragi, Katsumi Tokumari

Journal:

Tetrahedron Letters

Year:

1983

Language:

english

File:

PDF, 246 KB

english, 1983

38

Effects of chain length on behavior of biradicals generated from Norrish type I reaction of 2,2-diphenylcycloalkanones. Isolation and photochemistry of intermediate methylenecyclohexadienyl ketones

Ryoko Tanaka, Itsuko Suzuki, Akinori Yamaguchi, Hiroaki Misawa, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Tetrahedron Letters

Year:

1992

Language:

english

File:

PDF, 284 KB

english, 1992

39

Autoxidation of adamantylideneadamantane in a protic solvent. Facile proton-induced electron transfer from the olefin to oxygen

Ryoichi Akaba, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Tetrahedron Letters

Year:

1984

Language:

english

File:

PDF, 255 KB

english, 1984

40

Triplet sensitized isomerization of a CCCN system. Energy surface of the triplet state and effects of azulene, oxygen, and di-tert-butyl nitroxide

Keiko Ikoma, Akiko Okami, Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Tetrahedron Letters

Year:

1984

Language:

english

File:

PDF, 235 KB

english, 1984

41

Chemical evidence for radiationless deactivation of triplet excited benzophenone to its ground state through a sequence of chemical reactions in aromatic solvents

Keiko Nowada, Motoyuki Hisaoka, Hirochika Sakuragi, Katsumi Tokumaru, Masayuki Yoshida

Journal:

Tetrahedron Letters

Year:

1978

Language:

english

File:

PDF, 155 KB

english, 1978

42

Diarylnitroxides: Their formation from diarylamines by oxidation with peroxybenzoic acid and decomposition on alumina

Katsumi Tokumaru, Hirochika Sakuragi, Osamu Simamura

Journal:

Tetrahedron Letters

Year:

1964

Language:

english

File:

PDF, 158 KB

english, 1964

43

Structure-reactivity relationships in triplet sensitized photolysis of aromatic ketone O-acyloximes

Hirochika Sakuragi, Masayuki Yoshida, Hideko Kinoshita, Kimie Utena, Katsumi Tokumaru, Masamatsu Hoshino

Journal:

Tetrahedron Letters

Year:

1978

Language:

english

File:

PDF, 145 KB

english, 1978

44

Effects of protic solvents upon intramolecular interaction of polymethylene bis-p-phenylenediacrylates

Toshiki Komatsu, Hirochika Sakuragi, Jun'ichi Nagasawa, Fusae Nakanishi

Journal:

Tetrahedron Letters

Year:

1998

Language:

english

File:

PDF, 255 KB

english, 1998

45

Violet emission observed from phthalocyanines

Yuji Kaneko, Yoshinobu Nishimura, Nobuaki Takane, Tatsuo Arai, Hirochika Sakuragi, Nagao Kobayashi, Daisaku Matsunaga, Chyongjin Pac, Katsumi Tokumaru

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1997

Language:

english

File:

PDF, 321 KB

english, 1997

46

Switching of reaction pathways due to methylene chain length effects

Ryoichi Nakagaki, Hirochika Sakuragi, Kiyoshi Mutai

Journal:

Journal of Physical Organic Chemistry

Year:

1989

Language:

english

File:

PDF, 875 KB

english, 1989

47

Second harmonic generation in a Langmuir monolayer of the new amphiphilic coordination compound pentacyano(4-octadecylaminopyridine)-ferrate(III)

Franck Armand, Hirochika Sakuragi, Katsumi Tokumaru, Toshiki Yamada, Kotaro Kajikawa, Hideo Takezoe, Shuji Okada, Hiro Matsuda, Hachiro Nakanishi

Journal:

Molecular Engineering

Year:

1993

Language:

english

File:

PDF, 468 KB

english, 1993

48

A novel “across-a-ridge” isomerization of olefins. The energy surface of 2-ethenylanthracene in the excited triplet state

Hiroaki Misawa, Takashi Karatsu, Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Chemical Physics Letters

Year:

1988

Language:

english

File:

PDF, 422 KB

english, 1988

49

Highly selective rotational isomerization of 2-vinylanthracene in the excited singlet state. Picosecond time-resolved fluorescence study

Tatsuo Arai, Takashi Karatsu, Hirochika Sakuragi, Katsumi Tokumaru, Naoto Tamai, Iwao Yamazaki

Journal:

Chemical Physics Letters

Year:

1989

Language:

english

File:

PDF, 438 KB

english, 1989

50

Direct observation of cis-to-trans conversion of olefin radical cations. Electron transfer-induced isomerization of stilbene derivatives

Yasunao Kuriyama, Tatsuo Arai, Hirochika Sakuragi, Katsumi Tokumaru

Journal:

Chemical Physics Letters

Year:

1990

Language:

english

File:

PDF, 337 KB

english, 1990