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1

Electrochromism of polyaniline film prepared by electrochemical polymerization

Watanabe, Akira, Mori, Kunio, Iwasaki, Yasunori, Nakamura, Yoshiro, Niizuma, Shigeya

Journal:

Year:

1987

Language:

english

File:

PDF, 518 KB

english, 1987

2

ChemInform Abstract: Synthesis, Structure, and Redox Reactions of a New Crowded Benzodithiolium Salt: First Isolation and Characterization of a Stable Dithiolyl Radical with a 7π Electron Framework.

Satoshi Ogawa, Mieko Kikuchi, Yasushi Kawai, Shigeya Niizuma, Ryu Sato

Journal:

Year:

2000

File:

PDF, 32 KB

2000

3

ChemInform Abstract: Photooxygenation of Chromone-2-carboxylic Acid: Identification of Ketohydroperoxide Using a Chemiluminescence Technique.

Hiroki Kawata, Tsutomu Kumagai, Shigeya Niizuma

Journal:

Year:

2000

File:

PDF, 24 KB

2000

4

ChemInform Abstract: Novel Photochemical Ring Contraction of 1,4,7,10-Tetraisopropyldibenzo[c,g][1,2,5,6]tetrachalcogenocins: Efficient Synthesis, Structure, and Redox Reactions of 1,4,6,9-Tetraisopropylchalcogenanthrenes.

Satoshi Ogawa, Mutsumi Sugawara, Yasushi Kawai, Shigeya Niizuma, Takeshi Kimura, Ryu Sato

Journal:

Year:

2000

File:

PDF, 32 KB

2000

5

Generation and Detection of a Dithia Dication Derived from 4,9-Diethyl[1,4]dihydrodithiino[5,6-f]benzotrithiole 5-Oxide (II) and Its Disproportionation.

Takeshi Kimura, Shinya Ito, Takashi Sasaki, Shigeya Niizuma, Satoshi Ogawa, Ryu Sato, Yasushi Kawai

Journal:

Year:

2002

File:

PDF, 27 KB

2002

6

A New Type of Photodimerization Reaction for Coumarin Derivatives.

Hiroki Kawata, Satoko Ichikawa, Tsutomu Kumagai, Shigeya Niizuma

Journal:

Year:

2002

File:

PDF, 30 KB

2002

7

CIDEP studies of a radical pair produced upon excitation of the molecular complex of acridine and acridan in the solid state at room temperature

Shigeya Niizuma, Kimio Akiyama, Jeffrey K.S. Wan

Journal:

Chemical Physics Letters

Year:

1988

Language:

english

File:

PDF, 312 KB

english, 1988

8

Electron spin resonance study of free radicals in Athabasca asphaltene

Shigeya Niizuma, C.Truman Steele, Harry E. Gunning, Otto P. Strausz

Journal:

Year:

1977

Language:

english

File:

PDF, 888 KB

english, 1977

9

Tris(2,2′-bipyridine)nickel(I) and tris(2,2′-bipyridine)-niccolate(-I) ions in acetonitrile

Nobuyuki Tanaka, Tateaki Ogata, Shigeya Niizuma

Journal:

Inorganic and Nuclear Chemistry Letters

Year:

1972

Language:

english

File:

PDF, 109 KB

english, 1972

10

Studies on the photoreaction of heterocyclic N-dioxides: photochromism of phenazine N-dioxides in organic solvents

Hiroki Kawata, Shigeya Niizuma, Hiroshi Kokubun

Journal:

Journal of Photochemistry

Year:

1978

Language:

english

File:

PDF, 541 KB

english, 1978

11

Studies on the photoreaction of heterocyclic N-dioxides: photoreaction of pyrazine N-dioxide in aqueous solution

Hiroki Kawata, Shigeya Niizuma, Hiroshi Kokubun

Journal:

Journal of Photochemistry

Year:

1980

Language:

english

File:

PDF, 228 KB

english, 1980

12

Photochemical production of semiquinone radicals of o-methylfluorescein methyl ester in ethanol

Shigeya Niizuma, Koichi Kikuchi, Hiroshi Kokubun

Journal:

Journal of Photochemistry

Year:

1987

Language:

english

File:

PDF, 789 KB

english, 1987

13

Studies of photoinduced tautomerism of 2-hydroxyphenazine using flash photolysis

Hiroki Kawata, Shigeya Niizuma, Koichi Kikuchi

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1990

Language:

english

File:

PDF, 440 KB

english, 1990

14

Synthesis, structure, and one-electron redox reactions of 4,7-disubstituted benzotrichalcogenoles containing sulfur and/or selenium atoms

Satoshi Ogawa*, Tadahito Ohmiya, Takamasa Kikuchi, Atsuko Kawaguchi, Satoshi Saito, Akihiko Sai, Naomi Ohyama, Yasushi Kawai, Shigeya Niizuma, Shiduko Nakajo, Takeshi Kimura, Ryu Sato*

Journal:

Journal of Organometallic Chemistry

Year:

2000

Language:

english

File:

PDF, 163 KB

english, 2000

15

Photodimerization of 2,6-diphenylpyrylium salt in the solution

Hiroki Kawata, Yoshizo Suzuki, Shigeya Niizuma

Journal:

Tetrahedron Letters

Year:

1986

Language:

english

File:

PDF, 181 KB

english, 1986

16

Photodimerization reaction of 10-methylacridone

Hiroki Kawata, Kazuaki Shimada, Tsutomu Kumagai, Shigeya Niizuma

Journal:

Tetrahedron Letters

Year:

1993

Language:

english

File:

PDF, 197 KB

english, 1993

17

A new type of photodimerization reaction for coumarin derivatives

Hiroki Kawata, Satoko Ichikawa, Tsutomu Kumagai, Shigeya Niizuma

Journal:

Tetrahedron Letters

Year:

2002

Language:

english

File:

PDF, 79 KB

english, 2002

18

Novel photochemical ring contraction of 1,4,7,10-tetraisopropyldibenzo[c,g][1,2,5,6]tetrachalcogenocins: efficient synthesis, structure, and redox reactions of 1,4,6,9-tetraisopropylchalcogenanthrenes

Satoshi Ogawa, Mutsumi Sugawara, Yasushi Kawai, Shigeya Niizuma, Takeshi Kimura, Ryu Sato

Journal:

Tetrahedron Letters

Year:

1999

Language:

english

File:

PDF, 317 KB

english, 1999

19

Photodecarboxylation of chromone-2-carboxylic acid in aerated and deaerated ethanol solution

Hiroki Kawata, Tsutomu Kumagai, Tadayoshi Morita, Shigeya Niizuma

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

2001

Language:

english

File:

PDF, 192 KB

english, 2001

20

Photoreduction of flavone: identification of the photoproducts and reaction mechanism

Hiroki Kawata, Tsutomu Kumagai, Eiichi Suzuki, Shigeya Niizuma

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1996

Language:

english

File:

PDF, 267 KB

english, 1996

21

Acid-base equilibrium in Excited State of 10-Methylacridone

Dr. Hiroki Kawata, Shigeya Niizuma

Journal:

Advanced Synthesis & Catalysis

Year:

1994

Language:

english

File:

PDF, 294 KB

english, 1994

22

Flash photolysis of 2,2′,3,3′,5,5′,6,6′-octaphenyl-4,4′,-bi-4H-pyran: evidence for radical formation by photodissociation

Hiroki Kawata, Shigeya Niizuma

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1989

Language:

english

File:

PDF, 241 KB

english, 1989

23

Photoreaction of pyocyanine by continuous light illumination and flash photolysis

Hiroki Kawata, Shigeya Niizuma

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

1992

Language:

english

File:

PDF, 285 KB

english, 1992

24

Synthesis, structure and redox reactions of a new crowded benzodithiolium salt: first isolation and characterization of a stable dithiolyl radical with a 7π electron framework

Ogawa, Satoshi, Kikuchi, Mieko, Sato, Ryu, Kawai, Yasushi, Niizuma, Shigeya

Journal:

Chemical Communications

Year:

1999

Language:

english

File:

PDF, 62 KB

english, 1999

25

Mechanism of photodimerization reaction of 10-methylacridone in polar and non-polar solvents

Kawata, Hiroki, Shimada, Kazuaki, Kumagai, Tsutomu, Niizuma, Shigeya

Journal:

Journal of the Chemical Society Perkin Transactions 2

Year:

1993

Language:

english

File:

PDF, 477 KB

english, 1993

26

Preparation and novel one-electron redox reactions of a new stable 4,7-diisopropylbenzo[1,2-d][1,2,3]triselenole and its radical cation salt

Ogawa, Satoshi, Kikuchi, Takamasa, Niizuma, Shigeya, Sato, Ryu

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1994

Language:

english

File:

PDF, 240 KB

english, 1994

27

E.P.R. and zero-field odmr studies of the T 1 states of halogen-containing benzonitriles, anisoles and anilines

Niizuma, Shigeya, Kwan, Lawrence, Hirota, Noboru

Journal:

Molecular Physics

Year:

1978

Language:

english

File:

PDF, 1015 KB

english, 1978

28

Phosphorescence microwave double resonance studies of the T1 states of substituted 1-indanones and related molecules

Niizuma, Shigeya., Hirota, Noboru.

Journal:

Journal of Physical Chemistry

Year:

1979

Language:

english

File:

PDF, 1.10 MB

english, 1979

29

Zero field optically detected magnetic resonance and phosphorescence studies of the lowest excited triplet states of 1-indanone and acetophenone traps at low temperature

Niizuma, Shigeya, Hirota, Noboru

Journal:

Journal of Physical Chemistry

Year:

1978

Language:

english

File:

PDF, 957 KB

english, 1978

30

Reactive States of Acridine in Alcohols and the p K Value of T( n -π * ) State as judged from the pH Dependence of the Photoreduction Quantum Yield

Nakamaru, Katsumi, Niizuma, Shigeya, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1969

Language:

english

File:

PDF, 5.48 MB

english, 1969

31

Photochemical Reaction of 9-Cl-Acridine in Aerated and Deaerated Ethanol. I

Nakamaru, Katsumi, Niizuma, Shigeya, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1971

File:

PDF, 895 KB

1971

32

Reactive States of Acridine for the Photoreduction in Tetrahydrofuran

Miyashita, Yoshikatsu, Niizuma, Shigeya, Kokubun, Hiroshi, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1970

File:

PDF, 997 KB

1970

33

Photoreduction of Phenazine in Alcohols and by EDTA in the Aqueous Solution

Iwaoka, Teiki, Niizuma, Shigeya, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1970

File:

PDF, 1.09 MB

1970

34

Photochemistry of Acridines. XVIII. Photoreduction by Nonpolar H-donors and the Disproportionation of C-Radicals

Hoshino, Mikio, Niizuma, Shigeya, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1972

File:

PDF, 816 KB

1972

35

Polarographic and ESR Studies on the Electrode Reactions of Tris(2,2′-bipyridine)iron(II) in Acetonitrile

Tanaka, Nobuyuki, Ogata, Tateaki, Niizuma, Shigeya

Journal:

Bulletin of the Chemical Society of Japan

Year:

1973

File:

PDF, 327 KB

1973

36

ESR Study on Fluorescein Semiquinone Radical

Niizuma, Shigeya, Sato, Yoshiharu, Konishi, Shiro, Kokubun, Hiroshi

Journal:

Bulletin of the Chemical Society of Japan

Year:

1974

File:

PDF, 765 KB

1974

37

CIDEP Study of 1,4-Naphthosemiquinone in Alcohols

Niizuma, Shigeya, Sato, Nobuyoshi, Kawata, Hiroki, Murakami, Osamu, Kanemoto, Akihiko, Kokubun, Hiroshi

Journal:

Bulletin of the Chemical Society of Japan

Year:

1985

File:

PDF, 623 KB

1985

38

ESR SPECTRA OF RADICAL ANIONS OF CALICENE DERIVATIVES.—LINE WIDTH ALTERNATION DUE TO ADJACENT n -PROPYL GROUPS

Niizuma, Shigeya, Konishi, Shiro, Kokubun, Hiroshi, Koizumi, Masao

Journal:

Chemistry Letters

Year:

1972

Language:

english

File:

PDF, 7.07 MB

english, 1972

39

ESR Studies on the Behavior of Fluorescein Semiquinone

Okuda, Michio, Momose, Yoshihiro, Niizuma, Shigeya, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1967

Language:

english

File:

PDF, 13.29 MB

english, 1967

40

Photochemical Reaction between Acridine and Acridan in the Presence and in the Absence of Oxygen. I. Studies by the Steady Light Illumination

Niizuma, Shigeya, Ikeda, Yoshinori, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1967

Language:

english

File:

PDF, 8.77 MB

english, 1967

41

Radicals Produced by UV Irradiation of Acridan and Acridine in Glassy and Crystalline Medium at 77°K

Niizuma, Shigeya, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1968

Language:

english

File:

PDF, 10.33 MB

english, 1968

42

Electron Spin Resonance Study on Radical Anions of Acridine and Its Halogen Derivatives

Konishi, Shiro, Niizuma, Shigeya, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1970

File:

PDF, 614 KB

1970

43

Four Radical Species Produced Photochemically in the Solid Mixture of Acridine and Acridan

Niizuma, Shigeya, Kokubun, Hiroshi, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1971

File:

PDF, 983 KB

1971

44

Pyranyl Radicals and Their Dimers

Kawata, Hiroki, Niizuma, Shigeya

Journal:

Bulletin of the Chemical Society of Japan

Year:

1989

File:

PDF, 865 KB

1989

45

ON THE STABLE RADICAL CATION PRODUCED DURING THE PHOTOREDUCTION OF 9,9′-BIACRIDYL IN ETHANOL AND ITS ESR SPECTRUM

Niizuma, Shigeya, Nakamaru, Katsumi, Koizumi, Masao

Journal:

Chemistry Letters

Year:

1972

Language:

english

File:

PDF, 6.14 MB

english, 1972

46

PHOTOREDUCTION OF PHENAZINE BY CONTINUOUS LIGHT ILLUMINATION IN AQUEOUS SULFURIC ACID SOLUTION

Kawata, Hiroki, Niizuma, Shigeya, Kokubun, Hiroshi

Journal:

Chemistry Letters

Year:

1976

Language:

english

File:

PDF, 5.89 MB

english, 1976

47

Radical Formation Initiated by the Biphotonic Excitation of Acridone

Miyashita, Yoshikatsu, Niizuma, Shigeya, Kokubun, Hiroshi, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1973

File:

PDF, 833 KB

1973

48

Photochemical Reaction of 9-Chloroacridine in Aerated and Deaerated Ethanol. II. Studies by Means of a Flash Technique

Nakamaru, Katsumi, Niizuma, Shigeya, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1972

File:

PDF, 456 KB

1972

49

ESR Studies on Radical Anions of Calicene Derivatives

Konishi, Shiro, Niizuma, Shigeya, Kokubun, Hiroshi, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1973

File:

PDF, 769 KB

1973

50

The Photoreduction of Acridine in Deaerated and Aerated Alcohol Solutions. II.

Niizuma, Shigeya, Koizumi, Masao

Journal:

Bulletin of the Chemical Society of Japan

Year:

1963

Language:

english

File:

PDF, 15.13 MB

english, 1963

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