Abstract: An organic electroluminescent device, which has a pair of electrodes and at least one organic layer including a luminescent layer between the pair of electrodes, wherein at least one layer between the pair of electrodes comprises at least one metal complex having a tridentate- or higher polydentate-chain structure ligand.

Abstract: The invention provides an optical information recording medium having at least a substrate and a recording layer capable of recording information provided on the substrate. The recording layer contains at least a metal complex compound obtained by forming a salt from a cationic part and an anionic part, and the cationic part being a cation of a metal complex having a molar absorbance coefficient (?) in the wavelength range of 350 to 1300 nm of 10,000 dm3 mol?1 cm?1 or less when an anionic part is any one of Cl?, Br?, I?, ClO4?, PF6?, BF4?, SO42?, or CF3SO3?. A thermal decomposition temperature of the metal complex is preferably 250° C. or higher when an anionic part of any one of Cl?, Br?, I?, ClO4?, PF6?, BF4?, SO42?, or CF3SO3?.

Abstract: The invention provides an optical information recording medium having a recording layer capable of recording information by irradiating the recording layer with a laser beam of 440 nm or less. In the optical information recording medium, the recording layer contains an oxonol dye represented by formula (1), and a counter cation (Yt+) of this dye is a cationic dye having an absorption maximum in a range of longer wavelengths than an absorption maximum of an anionic part of the oxonol dye. In the formula, A, B, C and D each represents an electron-withdrawing group. A and B or C and D may be combined with each other to form a ring. If these are not combined with each other, these are electron-withdrawing groups in which the sum of Hammett's ?p values of A and B and the sum of Hammett's ?p values of C and D are each greater than 0.6. R represents a substituent group on methine carbon, and m represents an integer of 0 to 1. n represents an integer of 0 to 2m+1.

Abstract: The optical information recording medium comprises a reflective layer, a recording layer, a barrier layer, and a cover layer in this order on a surface of a support, and a layer formed by curing an ultraviolet radiation-curable composition between the barrier layer and the cover layer, the layer having a glass transition temperature of equal to or lower than 25° C. The surface of the support has pregrooves with a track pitch of 50 to 500 nm. The recording layer ranges in thickness from 1 to 100 nm on the lands and from 5 to 150 nm on the grooves, and comprises at least one azo dye compound selected from the group consisting of an azo compound and an azo metal complex compound comprising an azo compound and a metal ion or metal oxide ion, with an attenuation coefficient of 0.15 to 0.3 at a wavelength of 405 nm.

Abstract: The optical information recording medium comprises a recording layer on a surface of a support. The surface of the support has pregrooves with a track pitch ranging from 50 to 500 nm, the recording layer comprises an azo metal complex dye, the azo metal complex dye is a complex of one or more azo dye and transition metal ions of which number is equal to or greater than the number of the azo dye. The azo metal complex dye comprises two or more transition metal ions per molecule, and in a molecule of the azo metal complex dye.

Abstract: A blue laser-ready information recording medium improved in light stability and durability without impairment of record/playback characteristics is provided. The information recording medium is an optical information recording medium having on a substrate a recording layer that permits recording of information by irradiation with laser light of 440 nm or below, and is a heat-mode information recording medium that has a recording layer containing a methine dye and an organic oxidant on a transparent disk-form substrate on which a pregroove having a track pitch of 0.2 to 0.5 ?m is formed, and that on the pregroove-formed side of the substrate.

Abstract: A first optical information recording medium comprises a first WORM-type recording layer on which information is recorded by irradiation with a laser light having a wavelength of 440 nm or less, and a cover layer having a thickness of 0.01 to 0.5 mm, formed in this order on a first substrate having a thickness of 0.7 to 2 mm. Specifically, for example, a first light reflection layer, the first WORM-type recording layer, a barrier layer, a first adhesion layer, and the cover layer are formed in this order on the first substrate. The first WORM-type recording layer comprises at least one azo dye. The azo dye has an —N?N— group and a pyrazole ring bonded thereto, and contains no metal atoms or metal ions in the molecule.

Abstract: An optical information recording medium having a recording layer on which information can be recorded by irradiation with a laser light having a wavelength of 440 nm or less, wherein the recording layer contains at least one azo-metal complex dye derived from a metal ion or a metal oxide ion and an azo dye represented by the following general formula (1-1) or (1-2): wherein Q represents a carbocyclic group or a heterocyclic group, and R6 to R8 independently represent a hydrogen atom or a substituent.

Abstract: An optical information recording medium having a WORM-type recording layer on which information can be recorded by irradiation with a laser light having a wavelength of 440 nm or less, wherein the WORM-type recording layer contains at least one azo-metal complex dye derived from a metal ion (or a metal oxide ion) and an azo dye represented by the following structural formula (I-1) or (I-2). In the structural formulae (I-1) and (I-2), Q represents a carbocyclic group or a heterocyclic group, Q2 and Q3 each represent an atomic group forming a nitrogen-containing heterocycle, and R2 represents a substituent.

Abstract: To provide an optical information recording medium allowing for high-density recording and reproduction of information by the irradiation with laser light of 440 nm or less and having excellent recording and reproducing characteristics (in particular, sensitivity and degree of modulation). An optical recording medium comprising a substrate having thereon a recording layer capable of recording information by the irradiation with laser light of 440 nm or less, wherein the recording layer comprises at least one platinum porphyrin represented by the following formula (I): Formula (I): wherein R11 to R18 each independently represents a hydrogen atom or a substituent.

Abstract: An optical information-recording medium comprises a recording layer comprising an oxonol dye represented by formula (1), and its counter cation is a cyanine cation: wherein A, B, C and D each represents an electron attractive group, wherein sum total of Hammett's ?p values of A and B, and sum total of Hammett's ?p values of C and D are respectively 0.6 or more, and A and B, or C and D may be linked with each other to make a ring; R represents a substituent on carbon of methine; m represents an integer of 0 or 1; n represents an integer of 0 to 2m+1, and when n represents an integer of 2 or more, plural R's may be the same or different, and they may be linked with each other to form a ring; Yt+ represents a t-valent cyanine cation; and t represents an integer of 1 to 10.

Abstract: An organic electroluminescent device, which has a pair of electrodes and at least one organic layer including a luminescent layer between the pair of electrodes, wherein at least one layer between the pair of electrodes comprises at least one metal complex having a tridentate- or higher polydentate-chain structure ligand.

Abstract: An organic electroluminescent device, which has a pair of electrodes, and at least one organic layer including a luminescent layer between the electrodes, wherein the organic layer contains at least one compound of formula (1): Formula (1) wherein Q11? are atoms for forming a nitrogen-containing hetero ring; Z11? to Z13? each are a substituted or unsubstituted carbon or nitrogen atom; n11? is 0 or 1; M11? is a metal or boron ion that may further have a ligand(s); and a compound of formula (6): Formula (6) wherein R63? to R66? each are a hydrogen atom or a substituent; X61? to X64? and Z61? to Z66? each are a substituted or unsubstituted carbon or nitrogen atom.

Abstract: A cut target medium driving type cutting plotter, in which a cut target medium to be cut is driven in a first direction and a cutting unit is driven in a second direction perpendicular to the first direction, thereby moving the cutting unit in a two-dimensional direction relative to the cut target medium to make the cutting unit to be selectively brought into press contact with and separated from the cut target medium to cut the cut target medium in a desired shape, the cut target medium driving type cutting plotter includes a cut target medium supporting sheet to removably support the cut target medium on a surface opposite to the cutting unit. Preferably, the cut target medium is driven in the first direction together with the cut target medium supporting sheet, and the cut target medium supported on the cut target medium supporting sheet is cut by the cutting unit.

Abstract: A chloroprene polymer composition containing an .alpha.,.beta.-unsaturated carboxylate polymer having a number average molecular weight of at least 300,000.

Abstract: A chloroprene polymer composition containing an .alpha.,.beta.-unsaturated carboxylate polymer having a number average molecular weight of at least 300,000.