JPH02232268A - Substituted tetrapyrazinoporphyrazine compound - Google Patents

Substituted tetrapyrazinoporphyrazine compound

Info

Publication number
JPH02232268A
JPH02232268A JP1053328A JP5332889A JPH02232268A JP H02232268 A JPH02232268 A JP H02232268A JP 1053328 A JP1053328 A JP 1053328A JP 5332889 A JP5332889 A JP 5332889A JP H02232268 A JPH02232268 A JP H02232268A
Authority
JP
Japan
Prior art keywords
metal
formula
pyrazine
oxide
hydrogen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1053328A
Other languages
Japanese (ja)
Inventor
Sumio Tokita
澄男 時田
Nozomi Kai
甲斐 望
Toshiaki Ogoshi
俊明 大越
Hisao Nishi
西 久夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Soda Co Ltd
Original Assignee
Nippon Soda Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Soda Co Ltd filed Critical Nippon Soda Co Ltd
Priority to JP1053328A priority Critical patent/JPH02232268A/en
Publication of JPH02232268A publication Critical patent/JPH02232268A/en
Pending legal-status Critical Current

Links

Abstract

NEW MATERIAL:A compd. of formula I [wherein R1-8 are each H, or each pair of R1 and R2, R3 and R4, R5 and R6, or R7 and R8 forms together with two adjacent C atoms of pyrazine a (substd) 6C or larger ring (O-contg.), provided that not all of them are H; M is H (or 2H), a metal, a metal (hydr)oxide, an acyl-, an alkoxy- or a siloxy-metal or a metal halide]. EXAMPLE:A compd. of formula II. USE:An optical recording medium, a photosensitive material for electrophotography and laser printing, an oxidation-reduction catalyst and a freshness retainer for flowers, cut flowers and foods. PREPARATION:2,3-Dicyanopyrazine of formula III (wherein Rx and Ry are each R1 and R2, R3 and R4, R5 and R6 or R7 and R8) or 1,3-diimino-2H-pyrrolo[3,4-b]- pyrazine which is a reaction product of NH3 therewith is heated with a metal (oxide), a metal salt, a metal halide or nothing [wherein M is H (or 2H)] in an inert solvent with a high b.p. (e.g. dichlorobenzene).

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は新規なテトラピラジノボルフィラジン類化合物
に関する.本発明の誘導体は安定で近赤外線に対して強
い吸収を持ち一般の有機溶媒に対し、高い溶解性を持つ
ため、光学的記録用媒体、電子写真、レーザープリンタ
用感光材料、酸化還元触媒或いは花舟、切花、食品の鮮
度維持剤等として利用することが出来る. 〔従来の技術) 従来近赤外光ないし可視光を吸収する材料であるシアニ
ン系色素、スクアリリウム系色素、ナフトキノン系色素
、フタ口シアニン系色素は光学的記録媒体、電子写真、
レーザープリンター等への応用が期待されているが、フ
タ口シアニン色素が耐久性および近赤外線ないし、可視
光の吸収性能において最も優れ、従来より種々検討され
ている.特に近年においてはレーザ光に高感度に感応す
るフタ口シアニン色素が光学的記録材料、レーザープリ
ンター用感光材料として朋待され、種々の新らしい構造
が提案されている.それらの一例を挙げるとフタ口シア
ニンのベンゼン環に溶剤溶解性を向上させ、および/ま
たは780〜830nmに強い吸収を持たせるための置
換基を導入したものとして例えばJournal of
  General ChemjsLry, USSR
,■. 2075(1976) (アミノ基導入型):
繊維高分子材料研究所研究発表会寅料 昭和60年16
7ページ(オクタアルコキシ基導入型);特開昭63−
17046’2(アミノ基導入型);特開昭60−20
9583、特開昭63−270765、(チオエーテル
導入型):特公昭59−.1311(エーテル又はチオ
エーテル導入型)がある.又780〜830n+mに強
い吸収を持たせるためフタロシアニンのベンゼン環に更
に芳香族環を縮合シ共役π電子の遷移エネルギーを小さ
くしたものとして例えば、次式(n) Y  , においてYがナフタレン環である特開昭61−25 8
 8 6,特開昭61−177288、特開昭61−2
68487、特開昭62−56191、特開昭62−1
22788、特開昭62−10093、特開昭63−2
75584などのナフタロシアニン類化合物、Yがフエ
ナント口基である特開昭63−87282などのテトラ
フェナント口ボルフィラジン類化合物がある. これらの試みは、実用性のある半導体レーザー感応性色
素を存機溶剤溶解性および/または780〜830nm
に強い吸収を持たせることの2点に主として着目して行
なわれているが、これだけでは未だ実用上十分なものと
は言えない.即ち例えば、光学的記録材料においては、
上記2点のほかに反射率が高いこと、融点又は分解点が
あまり高くないこと、それらのしきい値が高いこと、熱
伝導率が低いこと、光、酸素に対する耐性が高いこと、
lOh回以上の再生に耐えること等が必要であり、また
レーザープリンターにおいては電荷輸送材料との組合わ
せにおいて高い電荷注入効率を得るための適当なイオン
化ポテンシャルを持つこと、高感度の潜像を得るために
晴滅衰が小さいこと、レーザー光、酸素に対する耐久性
が高いことなどの性能が必要である, 〔発明が解決しようとする課題〕 本発明は前記事情にNみてなされたものであり、その目
的は、フタ口シアニン類の基本構造であるベンゼン環を
ピラジン環に置き換えテトラビラジノボルフィラジンと
し、更にそれらに置換基を導入することにより有機溶剤
溶解性、および分子の基本構造に係る前記各種性能の改
変された新規なテトラビラジノボルフィラジン誘導体を
提供することにある. 本発明に係るテトラビラジノボルフィラジン誘導体と類
伯の構造を有する化合物は次式(I[[)においてR+
−R*−夏I (Gal’pern, M.G.:しu
k’yanets.  E.八.,  Zh.  Ob
shch  Khis.  Vol.  39No.1
1. 2536 〜4L(1969年)〕R.−R.−
CH.(特開昭61−291187)R,−RヨーCJ
s(日本化学会第56年会(1988年)講演予稿集2
Xi[ E35 ) R 1− R z −CONHz (SU−11.32
300(1.984 年))R +   R tのいず
れか一方がt−Bu、他方がH( Gal’pern,
 M.G.: Luk’yanets, E,A., 
Khi*.Getsrotsikl. Soedln.
,  (6), 858−9, (1972年);lz
v.^kad.Nauk SSSR,Ser.κhim
..ユ973  ,1.976)のそれぞれの化合物が
あるが、これらは有機溶剤溶解性、半導体レーザー感応
性、その他において未だ十分なものではない. 〔課題を解決するための手段〕 本発明は、一般式(1) (式中R1〜R@は水素又はピラジンの隣合った2つの
炭素原子を含み、R1 とR z  R * とR4R
,とR.−又はR,とR.が一緒になって炭素数6以上
の環を形成する。この環は中間に酸素を含んでいてもよ
いし、fflaされていてもよい。ただし、R r −
R sがすべて水素ではない.Mは水素(2H),金属
、金属酸化物、金属水酸化物、アシル金属、アルコキシ
金属、シロキシ金属又は金属ハロゲン化物を示す.]で
表わされるテトラピラジノボルフイラジン類化合物であ
る.式CT)のMは水素(2H)、金属、金属酸化物、
金属水酸化物、アシル金属、アルコキシ金属、シロキシ
金属又は金属ハロゲン化物であり、例えばMgSAIC
I,SiCIg ,$1 (OH)Si(COCIHs
   冫 x     S  I   (OCHx  
)  zSi(OSrCCH3)s)t  Ca,TI
O、VO..Cr、MnSFe%Co,NJ、Cu,Z
n,Ga,GeSZrOSNb..Mo,RuSPdS
 InCI% InBr、gn,SnCI,,SnBr
z   Snug   TaSPb,Bk  (ランク
ニl″)などを示す. 本発明のテトラボルフィラジン頚化合物はFrank 
If. Moser,八rthur L. Thoma
s著、rPhthalocyanines  J  C
19B3年CRC PRESS>:JournaI  
or  CheIIical  Society+  
 911(1937冫;Journal or the
 Amertcan Chemical Soclet
y+85,668(1963); Ztiurna[ 
Obshchet Khim目. 39.2536(1
969); Journal or Heferocy
cllc Chamlstry+1403(1970)
に記゛述さている様な従来公知の方法に従かい前記のR
,〜R.で示される置?AMを有する2、3−ジシアノ
ビラジン、或いはそのNH,との反応生成物であるl、
3−ジイミノ−2H−ビロロ〔3、4−b〕ビラジン誘
導体と金属、金属酸化物、金属塩、金属ハロゲン化物あ
るいは何も用いず〔M:水素(2H))Lて、要すれば
、キノリン、トリクロルベンゼン、ジクロルベンゼン、
クロルナフタレン等、高沸点不活性溶媒中で100〜2
50゜Cに加熱することにより製造されるほか、エタノ
ール等低沸点アルコール中、1、8−ジアザビシクロ(
5,4,O)ウンデセン−7(DBU)の存在下、撹拌
還流することによっても容易に製造することが出来る.
金属、金属酸化物、金属塩、金属ハロゲン化物としては
例えばMg..MgC1t、MgO、A I C I 
s   S i C I −T I C I 4   
V C I z   C r ( O A c ) z
  M nOt  Mn,FeCIz   CoCIz
  NiCINj,Cu.CI、CICIi 、ZnC
I,GaCIt 、GeCIa  ZrC1a  Nb
−ハライド、MoSRuCIz   PdCIx   
InCIs   InBrs  SnSSnCIt  
 SnBrSnlz   Ta−ハライド、PbOラン
タ二ド・ハライド、ランタニド・アセテートなどが挙げ
られる. 本発明の合成原料の1つである5、6一置換の2、3−
ジシアノビラジン(V)はDAMNとジケトン(IV)
を水、アルコールあるいは有機酸中で反応させることに
より合成される. ここでRxSRyは、R1 とR z  R s とR
,Rs とR.,Rff とR,を示し、R,〜R.は
前記と同じ意味を示す.ジケトン(IV)は、 K.B
.Sharpless,eL.a+. ,  Jour
nal of’ the As+ericanChem
ical ScleLy.93.3303(1971)
等に記載された従来公知の方法で製造される. 〔実施例] 次に実施例を挙げて、本発明を更に説明する.実施例1 還流冷却器と温度計と撹拌装置のついた5 0 ml3
つ口ヘルツ型フラスコに2、3−ジシアノシク口ドデカ
ノ〔b・〕ピラジン(Vl) 1.  0g (3.7
 mmol )とメタノールlO−を入れ、1度還流さ
せ完全に熔解したことを61 tpしてから、DBU0
.  3 4ml (2.  3+*mol)をメスピ
ペットを用いて加えた.このまま、30時間撹拌還流さ
せた.冷却後、濾過しメタノールで洗浄した.これをク
ロロホルムーシ、リカゲル系力ラムクロマトグラフィー
により分離を行った.さらに、300倍量のクロロホル
ムーエタノール(V/V 5 : 7 ) rJR 合
79媒で再結晶し、青色の極く微小の針状晶〔■〕が得
られた。収量0.19g(収率18%).IR  : 
3270,2900,1550.1510cm −’U
V−VrS : 342,621,655nm  (溶
媒,クロロホルム)’H−NMR : −1.061)
1111(3,2B), 1.30 〜1.82ppm
(m,48}1) . 2.40〜2.52pp■(鋼
, 1611) ,3.62ppm(t, 1.6I+
) MS  ,H+ 1075  (Mり−1075.5)
元素分析: C.70.26(70.30),  H;
7.54(7.74).N .20.49(20.50
)% ( )内計算値、(ただし、〔■〕は1水塩C64HI
ANl&Oとして計算した.)クロロホルムに対する溶
解性(室温):3.2xlO−’sol/ 1 ないし、可視光を効果的に吸収するため光学的記録媒体
、電子写真、レーザープリンター用感光材料、酸化還元
触媒或いは花井、切り花、食品の鮮度維持剤等として有
効に利用することができる.出願入(430)日本曹達
株式会社 代理人(7125)横 山  吉 美 同  (9648)東  海    裕  作〔発明の
効果〕
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to novel tetrapyrazinovolfirazine compounds. The derivatives of the present invention are stable, have strong near-infrared absorption, and have high solubility in general organic solvents, so they can be used as optical recording media, electrophotography, photosensitive materials for laser printers, redox catalysts, and flowers. It can be used as a freshness-preserving agent for boats, cut flowers, and food. [Prior art] Conventionally, cyanine dyes, squarylium dyes, naphthoquinone dyes, and futacyanine dyes, which are materials that absorb near-infrared light or visible light, have been used in optical recording media, electrophotography,
Although it is expected to be applied to laser printers, etc., cyanine dyes have the best durability and near-infrared to visible light absorption properties, and have been studied in various ways. Particularly in recent years, cap cyanine dyes that are highly sensitive to laser light have been sought after as optical recording materials and light-sensitive materials for laser printers, and various new structures have been proposed. An example of such a product is one in which a substituent is introduced into the benzene ring of futacyanine to improve solvent solubility and/or to have strong absorption in the 780 to 830 nm range.
General ChemjsLry, USSR
, ■. 2075 (1976) (amino group introduced type):
Textile and Polymer Materials Research Institute Research Presentation Materials 16, 1985
Page 7 (octaalkoxy group introduced type); JP-A-63-
17046'2 (amino group introduced type); JP-A-60-20
9583, JP-A No. 63-270765, (thioether introduction type): JP-A No. 59-. 1311 (ether or thioether introduced type). In addition, in order to have strong absorption at 780 to 830n+m, an aromatic ring is further condensed to the benzene ring of the phthalocyanine to reduce the transition energy of the conjugated π electron.For example, in the following formula (n) Y, Y is a naphthalene ring. Japanese Unexamined Patent Publication No. 61-25 8
8 6, JP-A-61-177288, JP-A-61-2
68487, JP-A-62-56191, JP-A-62-1
22788, JP-A-62-10093, JP-A-63-2
There are naphthalocyanine compounds such as No. 75584, and tetraphenanto-volufirazine compounds such as JP-A-63-87282, in which Y is a phenant group. These attempts have developed practical semiconductor laser-sensitive dyes that are solvent-soluble and/or 780-830 nm.
This work has mainly focused on two points: providing strong absorption to the surface of the material, but this alone cannot be said to be sufficient for practical use. For example, in optical recording materials,
In addition to the above two points, the reflectance is high, the melting point or decomposition point is not very high, their threshold is high, the thermal conductivity is low, and the resistance to light and oxygen is high.
It is necessary to withstand regeneration over 1Oh times, and for laser printers, it must have an appropriate ionization potential to obtain high charge injection efficiency in combination with a charge transport material, and to obtain a highly sensitive latent image. Therefore, performance such as low decay and high durability against laser light and oxygen is required. [Problem to be solved by the invention] The present invention was made in view of the above circumstances, The purpose of this is to replace the benzene ring, which is the basic structure of futa-cyanines, with a pyrazine ring to form tetravirazinovolphyrazine, and to introduce substituents into these to improve the solubility in organic solvents and improve the basic structure of the molecule. The object of the present invention is to provide novel tetravirazinovolfirazine derivatives with modified various properties. A compound having a similar structure to the tetravirazinovolfilazine derivative according to the present invention is represented by the following formula (I[[) in which R+
-R*-Summer I (Gal'pern, M.G.:
k'yanets. E. Eight. , Zh. Ob
shch His. Vol. 39 No. 1
1. 2536-4L (1969)] R. -R. −
CH. (Unexamined Japanese Patent Publication No. 61-291187) R, -R yaw CJ
s (Chemical Society of Japan 56th Annual Meeting (1988) Lecture Proceedings 2
Xi[E35) R1-Rz-CONHz (SU-11.32
300 (1.984 years)) R + R t, one of which is t-Bu and the other is H (Gal'pern,
M. G. : Luk'yanets, E.A. ,
Khi*. Getsrotsikl. Soedln.
, (6), 858-9, (1972); lz
v. ^kad. Nauk SSSR, Ser. κhim
.. .. Although there are compounds for each of the following (Yu 973, 1.976), these are still insufficient in solubility in organic solvents, sensitivity to semiconductor lasers, and other aspects. [Means for Solving the Problems] The present invention solves the problems according to the general formula (1) (wherein R1 to R@ contain hydrogen or two adjacent carbon atoms of pyrazine, and R1, R z R *, and R4R
, and R. - or R, and R. together form a ring having 6 or more carbon atoms. This ring may contain oxygen in the middle or may be ffla. However, R r −
Not all Rs are hydrogen. M represents hydrogen (2H), metal, metal oxide, metal hydroxide, acyl metal, alkoxy metal, siloxy metal, or metal halide. ] is a tetrapyrazinoborofuirazine compound. M in formula CT) is hydrogen (2H), metal, metal oxide,
metal hydroxides, acyl metals, alkoxy metals, siloxy metals or metal halides, such as MgSAIC
I, SiCIg , $1 (OH)Si(COCIHs
冫 x SI (OCHx
) zSi(OSrCCH3)s)tCa,TI
O, VO. .. Cr, MnSFe%Co, NJ, Cu, Z
n, Ga, GeSZrOSNb. .. Mo, RuSPdS
InCI% InBr, gn, SnCI,, SnBr
z Snug TaSPb, Bk (Rankini l''), etc. The tetraborphyrazine neck compound of the present invention is Frank
If. Moser, 8thur L. Thoma
Author: Phthalocyanines J.C.
19B3 CRC PRESS>:JournaI
or CheIIIical Society+
911 (1937); Journal or the
Amertcan Chemical Soclet
y+85,668 (1963); Ztiurna [
Order Obschet Khim. 39.2536 (1
969); Journal or Heferology
cllc Chamlstry+1403 (1970)
The above R
,~R. The position indicated by ? 2,3-dicyanovirazine having AM or its reaction product with NH,
3-diimino-2H-virolo[3,4-b]virazine derivative and metal, metal oxide, metal salt, metal halide, or without using [M: hydrogen (2H)]L, if necessary, quinoline , trichlorobenzene, dichlorobenzene,
100-2 in a high-boiling inert solvent such as chlornaphthalene.
In addition to being produced by heating to 50°C, 1,8-diazabicyclo(
It can also be easily produced by stirring and refluxing in the presence of 5,4,O) undecene-7 (DBU).
Examples of metals, metal oxides, metal salts, and metal halides include Mg. .. MgC1t, MgO, A I C I
s S i C I - T I C I 4
V C I z C r (O A c ) z
M nOt Mn, FeCIz CoCIz
NiCINj, Cu. CI, CICIi, ZnC
I, GaCIt, GeCIa ZrC1a Nb
- Halide, MoSRuCIz PdCIx
InCIs InBrs SnSSnCIt
Examples include SnBrSnlz Ta-halide, PbO lanthanide halide, and lanthanide acetate. 5,6-monosubstituted 2,3- which is one of the synthetic raw materials of the present invention
Dicyanovirazine (V) is DAMN and diketone (IV)
It is synthesized by reacting in water, alcohol, or organic acid. Here, RxSRy is R1, R z R s and R
, Rs and R. , Rff and R, and R, ~R. has the same meaning as above. Diketone (IV) is K. B
.. Sharpless, eL. a+. , Jour
nal of' the As+ericanChem
ical Scley. 93.3303 (1971)
It is manufactured by the conventionally known method described in et al. [Example] Next, the present invention will be further explained with reference to Examples. Example 1 50 ml3 with reflux condenser, thermometer and stirrer
2,3-dicyanosyl-dodecano[b.]pyrazine (Vl) in a Hertzian flask.1. 0g (3.7
mmol) and methanol lO-, refluxed once to ensure complete melting, and then 61 tp, DBU0
.. 34 ml (2.3+*mol) was added using a graduated pipette. The mixture was stirred and refluxed for 30 hours. After cooling, it was filtered and washed with methanol. This was separated using chloroform and licage-based lamb chromatography. Further, it was recrystallized with 300 times the amount of chloroform-ethanol (V/V 5 : 7) rJR mixture to obtain blue extremely small needle-shaped crystals [■]. Yield: 0.19g (yield: 18%). IR:
3270, 2900, 1550.1510cm -'U
V-VrS: 342,621,655nm (solvent, chloroform)'H-NMR: -1.061)
1111 (3,2B), 1.30 ~ 1.82ppm
(m,48}1). 2.40-2.52pp■ (steel, 1611), 3.62ppm (t, 1.6I+
) MS, H+ 1075 (Mri-1075.5)
Elemental analysis: C. 70.26 (70.30), H;
7.54 (7.74). N. 20.49 (20.50
)% Calculated values in parentheses, (however, [■] is monohydrate C64HI
Calculated as ANl&O. ) Solubility in chloroform (room temperature): 3.2xlO-'sol/1 or because it effectively absorbs visible light, it can be used for optical recording media, electrophotography, photosensitive materials for laser printers, redox catalysts, flowers, cut flowers, etc. It can be effectively used as a food freshness preserving agent. Application filed (430) Agent for Nippon Soda Co., Ltd. (7125) Yoshiyoshi Yokoyama (9648) Created by Yutaka Tokai [Effects of the invention]

Claims (1)

【特許請求の範囲】[Claims] (1)一般式〔 I 〕 ▲数式、化学式、表等があります▼〔 I 〕 〔式中R_1〜R_8は水素又はピラジンの隣合った2
つの炭素原子を含み、R_1とR_2、R_3とR_4
、R_5とR_6、又はR_7とR_8が一緒になって
炭素数6以上の環を形成する。この環は、中間に酸素を
含んでいてもよいし、置換されていてもよい。 ただし、R_1〜R_8がすべて水素ではない。Mは、
水素(2H)、金属、金属酸化物、金属水酸化物、アシ
ル金属、アルコキシ金属、シロキシ金属又は金属ハロゲ
ン化物を示す。〕で表わされるテトラピラジノポルフィ
ラジン類比合物。
(1) General formula [I] ▲There are mathematical formulas, chemical formulas, tables, etc.▼[I] [In the formula, R_1 to R_8 are hydrogen or adjacent 2 of pyrazine.
R_1 and R_2, R_3 and R_4
, R_5 and R_6, or R_7 and R_8 together form a ring having 6 or more carbon atoms. This ring may contain oxygen in the middle or may be substituted. However, R_1 to R_8 are not all hydrogen. M is
Indicates hydrogen (2H), metal, metal oxide, metal hydroxide, acyl metal, alkoxy metal, siloxy metal, or metal halide. ] A tetrapyrazinoporphyrazine compound represented by
JP1053328A 1989-03-06 1989-03-06 Substituted tetrapyrazinoporphyrazine compound Pending JPH02232268A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1053328A JPH02232268A (en) 1989-03-06 1989-03-06 Substituted tetrapyrazinoporphyrazine compound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1053328A JPH02232268A (en) 1989-03-06 1989-03-06 Substituted tetrapyrazinoporphyrazine compound

Publications (1)

Publication Number Publication Date
JPH02232268A true JPH02232268A (en) 1990-09-14

Family

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Family Applications (1)

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Country Status (1)

Country Link
JP (1) JPH02232268A (en)

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WO1999015533A1 (en) * 1997-09-24 1999-04-01 Universita' Degli Studi Di Roma 'la Sapienza' Macrocyclic porphyrazine-type compounds, metal derivatives thereof and process for their preparation
EP1063264A2 (en) * 1999-06-22 2000-12-27 Ricoh Company, Ltd. Reaction product, process of producing same, electrophotographic photoconductor using same, electrophotographic apparatus having the photoconductor, and process cartridge for electrophotographic apparatus
WO2007023964A1 (en) * 2005-08-25 2007-03-01 Matsushita Electric Industrial Co., Ltd. Electrode for use in oxygen reduction
WO2022224990A1 (en) * 2021-04-21 2022-10-27 AZUL Energy株式会社 Capacitor, and capacitor composite material and method for manufacturing same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999015533A1 (en) * 1997-09-24 1999-04-01 Universita' Degli Studi Di Roma 'la Sapienza' Macrocyclic porphyrazine-type compounds, metal derivatives thereof and process for their preparation
US6337395B1 (en) 1997-09-24 2002-01-08 Universita Degli Studi Di Roma “La Sapienza” Macrocyclic porphyrazine-type compounds, metal derivatives thereof and process for their preparation
EP1063264A2 (en) * 1999-06-22 2000-12-27 Ricoh Company, Ltd. Reaction product, process of producing same, electrophotographic photoconductor using same, electrophotographic apparatus having the photoconductor, and process cartridge for electrophotographic apparatus
EP1063264A3 (en) * 1999-06-22 2001-08-29 Ricoh Company, Ltd. Reaction product, process of producing same, electrophotographic photoconductor using same, electrophotographic apparatus having the photoconductor, and process cartridge for electrophotographic apparatus
US6465648B1 (en) 1999-06-22 2002-10-15 Ricoh Company, Ltd. Reaction product, process of producing same, electrophotographic photoconductor using same, electrophotographic apparatus having the photoconductor, and process cartridge for electrophotographic apparatus
US6544701B2 (en) 1999-06-22 2003-04-08 Ricoh Company, Ltd. Reaction product, process for the production thereof, electrophotographic photoconductor using the reaction product, electrophotographic apparatus using the photoconductor, and process cartridge for electrophotographic apparatus
WO2007023964A1 (en) * 2005-08-25 2007-03-01 Matsushita Electric Industrial Co., Ltd. Electrode for use in oxygen reduction
US7695850B2 (en) 2005-08-25 2010-04-13 Panasonic Corporation Electrode for use in oxygen reduction
WO2022224990A1 (en) * 2021-04-21 2022-10-27 AZUL Energy株式会社 Capacitor, and capacitor composite material and method for manufacturing same

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