Ricoh Company, Ltd.

Hodogaya Chemical Co., Ltd.

Other

Richoh Company, Ltd.

Masaomi Sasaki

Tomoyuki Shimada

Tamotsu Aruga

Mitsuru Hashimoto

Chiaki Tanaka

Masafumi Ohta

Katsuhiro Morooka

Shinichi Kawamura

Susumu Suzuka

Mitsutoshi Anzai

Hiroshi Adachi

Hiroshi Tamura

Akihiro Yamaguchi

Hiroyuki Takahashi

Kazukiyo Nagai

Kiyoshi Sakai

Tetsuro Suzuki

Nozomu Tamoto

Kyoji Tsutsui

Masayuki Shoshi

Toshiya Sagisaka

Takashi Okada

Masafumi Torii

Nobuo Suzuki

Takayuki Sakai

Shigeyuki Harada

Daisuke Goto

Masaru Shimada

Hidenori Tomono

Yoshikazu Akiyama

Tsutomu Sato

Satoshi Yamamoto

Shinji Matsumoto

Yasuo Suzuki

Tohru Yashiro

Eiji Kurimoto

Yoshinori Okada

Shigenobu Hirano

Koh Fujimura

Tatsuya Tomura

Masayuki Koyano

Akihiro Imai

Akira Katayama

Kohkoku Ri

Chihaya Adachi

Akio Kozima

Mitsuo Okazaki

Katsukiyo Nagai

Toshio Fukagai

Akio Kojima

Hongguo Li

Katsuichi Ohta

Naoshi Mishima

Tomiko Kawakami

Kouji Kishida

Atsushi Takesue

Masao Yoshikawa

Takumi Yamaga

Megumi Kawahara

Hitoshi Kondoh

Yoshinobu Nakayama

Yasuo Murakami

Yuuko Komai

Mamiko Inoue

Yoshihisa Naijo

Takaaki Ikegami

Sukchan Kim

Kazuaki Tsuji

Keiichiroh Yutani

Takeshi Miki

Mikiko Takada

Takuji Kato

Mikiko Abe

Keigo Takauji

Toshimasa Tokuda

Masaki Okubo

Kaoru Tadokoro

Takashi Rokutanzono

Masakatsu Shimoda

Kawori Tanaka

Tsutomu Nakajima

Kaoru Teramura

Kazuya Ishida

Zenjiro Okuno

Takeo Kazami

Tatsuya Katoh, Deceased

Tomotsu Aruga

Masafumi Ota

Tomoyuki Shimida

By Mankichi Katoh, Heir

Yuuichiroh Kawamura

Kenji Muneuchi

Yuko Komai

A polymer containing a repeating unit expressed by General Formula (I): 

Arylamine polymer, method for producing the same, ink composition, film, electronic device, organic thin-film transistor, and display device

An electrochromic compound, represented by the following general formula (I); where Xto Xare each a substituent represented by the following general formula (II), an alkyl group that may contain a functional group, an aromatic hydrocarbon group that may contain a functional group, or a hydrogen atom, and at least two selected from Xto Xare the substituents represented by the general formula (II); where Rto Rare each independently a hydrogen atom, or a monovalent group that may contain a substituent; B is a substituted or unsubstituted monovalent group that may contain a functional group; Ais a monovalent anion; and m is any of 0 to 3, and Rto R, B, and m may each independently be different when a plurality of the substituents represented by the general formula (II) are present.

Electrochromic compound, electrochromic composition, display element, and dimming element

A light emitting device is configured to include a substrate and a luminous layer provided overlying the substrate, which includes a semiconductor nanocrystal to which a carbazole derivative is coordination-bonded or attached, the carbazole derivative having aromatic rings of a compound represented by the chemical structure 1, which is substituted by one to three substitution groups: The one to three substitution groups are represented by the chemical structure 2:-X-Y-Z&#x2003;&#x2003;Chemical Structure 2.X represents a methylene group, a carbonyloxy group, an oxycarbonyl group, a carbonyl group, an oxygen atom, and a sulfur atom, Y represents a substituted or non-substituted alkylene group, and Z represents a carboxyl group, a hydroxyl group, and a thiol group.

Light emitting device and display unit

A carbazole derivative represented by the following General Formula (1) where at least one aromatic ring has one to three substituents each represented by the following General Formula (2): 

Carbazole derivative and semiconductor nanocrystal

A carbazole polymer containing a repeating unit represented by a chemical structure 1: 

Carbazole polymer and method of manufacturing same

A photosensitized composite material and a material, an element, a device, and the like, which employ the photosensitized composite material, are provided. In the photosensitized composite material, multiphoton absorption compounds are highly sensitized for practical use by utilizing an enhanced plasmon field. The photosensitized composite material has a structure where the multiphoton absorption compounds are linked to the surface of a fine metal particle through linking groups. The fine metal particle generates an enhanced surface plasmon field in resonance with a multiphoton excitation wavelength. The multiphoton absorption compounds have a molecular structure enabling multiphoton absorption. The photosensitized composite material is contained in or used for, for example, a three-dimensional memory material and a three-dimensional recording medium, an optical power limiting material and an optical power limiting element, a photocuring material and a stereolithography system, and a fluorescent material for a multiphoton fluorescence microscope and a multiphoton fluorescence microscope.

Material for multiphoton fluorescence microscope and multiphoton fluorescence microscope

Provided are pi-conjugated polymer materials that are useful for photoelectric transducer elements having high hole transportability and excellent durability, that are useful for light-emitting elements having superior emitting properties and excellent durability, and that are useful for active layers of thin film transistors. The pi-conjugated polymers comprise a constitutional unit expressed by the General Formula (I) or (II): in which, Ar represents an aromatic hydrocarbon group or a heterocyclic group that may have a substituent; R represents a hydrogen atom, an alkyl group or an aromatic hydrocarbon group that may have a substituent; Arrepresents a divalent group of an aromatic hydrocarbon or a heterocycle that may have a substituent; in which, Ar represents an aromatic hydrocarbon group or a heterocyclic group that may have a substituent; R represents a hydrogen atom, an alkyl group or an aromatic hydrocarbon group that may have a substituent.

Pi-conjugated polymer

A 3,6-diphenylcarbazole compound, which has a specific formula and realizes an organic electroluminescent device having high durability and high luminous efficiency. An electroluminescent device which includes an anode; a cathode which faces the anode; and at least one layer including a luminescent layer, optionally a hole transporting layer and an electron transporting layer, which is located between the anode and the cathode, wherein the at least one layer includes the 3,6-diphenylcarbazole compound.

3, 6-diphenylcarbazole compound and organic electroluminescent device

The present invention provides a &#x3c0;-conjugated polymer containing a repeating unit expressed by the following General Formula (I):  where, in the General Formula (I), Y and Ar represent one of a substituted or unsubstituted aromatic hydrocarbon and a substituted or unsubstituted divalent group of aromatic heterocyclic ring, Yrepresents one of a substituted or unsubstituted unsaturated aliphatic hydrocarbon, a substituted or unsubstituted aromatic hydrocarbon and a substituted or unsubstituted divalent group of aromatic heterocyclic ring and R represents one of a hydrogen atom, a substituted or unsubstituted alkyl group and a substituted or unsubstituted aromatic hydrocarbon group.

&#x3c0;-Conjugated polymer and manufacturing method thereof

An aryl amine polymer is provided which contains a specific repeat unit, its use in preparing an organic semiconductor material which contains the aryl amine polymer and an additional specific compound and in the preparation of organic light emitting devices (OLED), organic thin film transistors (TFT) and so on, along with an organic TFT including a substrate, an organic semiconductor layer which contains the organic semiconductor material and is located overlying the substrate, an electrode pair of a source electrode and a drain electrode; and a third electrode.

Aryl amine polymer, thin film transistor using the new aryl amine polymer, and method of manufacturing the thin film transistor

An object of the present invention is to provide an electrophotographic photoconductor for liquid development, having high resistance to a carrier solvent for use in a liquid developing method and having practically high sensitivity, an image-forming apparatus including the photoconductor, and an image forming method. To achieve this object, the present invention provides an electrophotographic photoconductor for liquid development including a support, and a photosensitive layer on or above the support, wherein the photosensitive layer includes a charge-generating material, a charge-transporting material, and an acceptor compound, and the charge-transporting material includes a charge-transporting polymer having a specified structure.

Electrophotographic photoconductor for liquid development, image forming apparatus having the same, and image forming method

A polycarbonate resin has a constitutional unit expressed by the following general formula (I):  Arepresents an alkyl group which is substitutional or nonsubstitutional, and an aryl group which is substitutional or nonsubstitutional. A, A, A, A, Aand Aeach represent one of a hydrogen atom, a halogen atom, an alkyl group which has 1 to 6 carbon atoms and is substitutional or nonsubstitutional.

Electrophotographic photoconductor comprising a polycarbonate resin having a dihydroxy diphenyl ether unit

An electrophotographic photoconductor contains a conductive support; and a photoconductive layer disposed on the photoconductive support; wherein the photoconductive layer contains an azo compound expressed by a general formula &#x3c;&#x3c;1&#x3e;&#x3e;ArN&#x2550;N&#x2014;Cp),&#x2003;&#x2003;(&#x3c;&#x3c;1&#x3e;&#x3e;)wherein in the general formula &#x3c;&#x3c;1&#x3e;&#x3e;, Ar is a substituted or non-substituted aromatic series hydrocarbon group or an aromatic series heterocyclic ring group which can be bonded by way of a bonding group; Cp is a coupler residual group; n represents an integer of 1, 2, 3, or 4, at least one of the Cp is a coupler residual group selected from the group consisting of general formulae &#x3c;&#x3c;2&#x3e;&#x3e;, &#x3c;&#x3c;3&#x3e;&#x3e;, and &#x3c;&#x3c;4&#x3e;&#x3e; 

Electrophotographic photoconductor, process for forming an image, image forming apparatus and process cartridge for the same

Aryl amine polymer, thin film transistor using the aryl amine polymer, and method of manufacturing the thin film transistor

An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a structural unit of formula (2) and a structural unit with charge transporting properties, each of the structural units being contained in an amount of 5 wt. % or more of the total weight of the polycarbonate resin. There is disclosed an aromatic polycarbonate resin having a structural unit of formula (1) and the structural unit of formula (2), with the relationship between the composition ratios being 0&#x3c;k/(k+j)&#x3c;1 when the composition ratio of the structural unit (1) is k and that of the structural unit (2) is j, or an aromatic polycarbonate resin having a repeat unit of formula (3). The formulas (1) to (3) are specified in the specification.

Aromatic polycarbonate resin, electrophotographic photoconductor, process cartridge, and electrophotographic image forming method and apparatus

Growing community of inventors

Susono, Japan

Masaomi Sasaki