Abstract: There is provided a metal complex that is large in degree of a change in emission intensity, the change being caused by a change in molecular structure of a ligand through a photochromic reaction. The metal complex is arranged such that a diarylethene-based photochromic molecule coordinates to a metal ion via two groups directly bonded to respective reaction site carbons and that the groups are each independently a group selected from Formula Group (1) below.

Abstract: The present invention relates to Eu (II) compound nanocrystals doped with transition metal ions. Such a constitution generates quantum size effects of an Eu (II) compound nanoparticle, while the transition metal ions can affect a magnetooptical property of the Eu (II) compound nanoparticle. Thus, the magnetooptical property can be improved.

Abstract: The present invention is produced by a composite with an Eu (II) compound nanoparticle and a metal nanoparticle. Such production generates quantum size effects of the Eu (II) compound nanoparticle, while the surface plasmon of the metal nanoparticle can be used. Thus, the magnetooptical property can be improved. In addition, a thin film may be produced by a composite with an Eu (II) compound nanoparticle and a metal nanoparticle.

Abstract: The present invention has been created to provide a near infrared high emission rare-earth complex having an excellent light-emitting property in the near infrared region. The near infrared high emission rare-earth complex of the present invention is characterized in that its structure is expressed by the following general formula (1): where Ln(III) represents a trivalent rare-earth ion; n is an integer equal to or greater than three; Xs represent either the same member or different members selected from a hydrogen atom, a deuterium atom, halogen atoms, C1-C20 groups, hydroxyl groups, nitro groups, amino groups, sulfonyl groups, cyano groups, silyl groups, phosphonic groups, diazo groups and mercapto groups; and Z represents a bidentate ligand.

Abstract: A molecular structure analysis device of at least one embodiment of the present invention includes: a light source for illuminating, with exciting light, a measurement sample including a molecule to be structurally analyzed to which molecule a rare earth complex is bonded; a measurement section for receiving light emitted from the measurement sample and for measuring intensities of spectra of the light; a calculation section for performing normalization in which intensities of spectra including a line spectrum due to electric dipole transition among the measured intensities of the spectra of the light are normalized by an intensity at one wavelength in a line spectrum due to magnetic dipole transition; and an output section for outputting the spectra whose intensities have been normalized. This makes it possible to attain a device and a method capable of analyzing minute change in a dynamic structure of the molecule.

Abstract: The rare-earth complex of the present invention has high luminous efficiency, since it has a structure represented by the following general formula (I):

Abstract: A method to easily manufacture a nanosized EuSe crystal which has been conventionally difficult to be manufactured. Heating an Eu(III) complex whose general formula is represented by the following formula generates an EuSe crystal having a particle size corresponding to the heating condition. Alternatively, the mixture composed of Eu(III) complex, a counter cation, and a solvent may be heated. The particle size of the nanosized EuSe crystals can be manipulated by the heating condition, thus the absorption wavelength of the EuSe crystals can be easily controlled. In addition, it is easy to create a magnetooptic-responsive plastic using the high dispersibility of the EuSe crystals, thus it can be immediately applied to an optical isolator or other devices.

Abstract: There is provided a metal complex that is large in degree of a change in emission intensity, the change being caused by a change in molecular structure of a ligand through a photochromic reaction. The metal complex is arranged such that a diarylethene-based photochromic molecule coordinates to a metal ion via two groups directly bonded to respective reaction site carbons and that the groups are each independently a group selected from Formula Group (1) above.

Abstract: The present invention has been created to provide a near infrared high emission rare-earth complex having an excellent light-emitting property in the near infrared region. The near infrared high emission rare-earth complex of the present invention is characterized in that its structure is expressed by the following general formula (1): where Ln(III) represents a trivalent rare-earth ion; n is an integer equal to or greater than three; Xs represent either the same member or different members selected from a hydrogen atom, a deuterium atom, halogen atoms, C1-C20 groups, hydroxyl groups, nitro groups, amino groups, sulfonyl groups, cyano groups, silyl groups, phosphonic groups, diazo groups and mercapto groups; and Z represents a bidentate ligand.

Abstract: In one embodiment of the present invention, an information identification device, an information identification method, and an information identification system each of which can maintain a high security level and which can be used for a long time without any restrictions on use conditions are realized. An ID identification system includes: an ID identifying medium containing a rare-earth complex; and an ID identification device for identifying identification information corresponding to the rare-earth complex.

Abstract: In one embodiment of the present invention, an information identification device, an information identification method, and an information identification system each of which can maintain a high security level and which can be used for a long time without any restrictions on use conditions are realized. An ID identification system includes: an ID identifying medium containing a rare-earth complex; and an ID identification device for identifying identification information corresponding to the rare-earth complex.

Abstract: The present invention has been developed for providing a method to easily manufacture a nanosized EuSe crystal which has been conventionally difficult to be manufactured. Heating the Eu(III) complex whose general formula is represented by the following formula generates an EuSe crystal having a particle size corresponding to the heating condition. Alternatively, the mixture composed of Eu(III) complex, a counter cation, and a solvent may be heated. Since the particle size of the nanosized EuSe crystals can be manipulated by the heating condition, the absorption wavelength of the EuSe crystals can be easily controlled. In addition, since it is easy to create a magnetooptic-responsive plastic using the high dispersibility of the EuSe crystals, it can be immediately applied to an optical isolator or other devices.

Abstract: The present invention relates to a new optically active rare earth complex (1) represented by a general formula (1); (in the formula, X1 and X2 each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms or an alkoxyl group having 1 to 4 carbon atoms; Y1, Y2, Y3, and Y4, each independently represents a hydrogen atom, a halogen atom, or an alkyl group having 1 to 4 carbon atoms; R1 represents an alkyl group having 1 to 8 carbon atoms, a fluorine-substituted alkyl group having 1 to 8 carbon atoms, or a phenyl group: R2 is a group selected from the group consisting of (a) cyclopentadienyl groups, (b) phenyl groups, and (c) naphthyl groups).

Abstract: The present invention provides a fluorescent substance excellent in thermal resistance, which can be uniformly dispersed into plastic materials, and has a high fluorescence intensity even after experienced heat history in plastic forming processes. More specifically, the present invention provides a fluorescent substance containing a rare earth complex having benzophenone or benzoyl substituted with an alkyl group, a cycloalkyl group, an acyl group or an alkoxy group having a carbon number of 1 to 20 as a skeletal structure, in which a plurality of rare earth ions are coordinated with one or more types of molecules having a photosensitizing function.

Abstract: A crystalline rare-earth oxide or sulfide which has an average particle diameter of 10 nm or less and in which the rare-earth element has a low valance, in particular, crystalline EuO or EuS of nano size. The rare-earth oxide or sulfide is produced by irradiating an inorganic acid salt or organic acid salt of a rare-earth element having a high valence with a light in the range of from UV to visible light in the presence of: a compound which, upon irradiation with the light in the range of from UV to visible light induces a photooxidation-reduction reaction and simultaneously converts the rare-earth ions having a high valence into ions having a low valence; and a cholagen source compound which immediately reacts with the low valence ions to form a cholagen compound.

Abstract: A rare earth ternary complex represented by the following formula (1): wherein M is a rare earth atom; n1 is 2 or 3; n2 is 2, 3, or 4; Rf1 and Rf2 are the same or different and are each a aliphatic group having 1 to 22 carbon atoms and containing no hydrogen atoms, an aromatic group containing no hydrogen atoms, or an aromatic heterocyclic group containing no hydrogen atoms; and Z is a ligand containing X, phosphorus, or nitrogen.

Abstract: According to the present invention, first, a white LED with high color rendering property is realized. In addition, a general object of the present invention is to provide a highly practical light emitting device wherein a rare earth complex is utilized as a wavelength conversion light emitting device of a high efficiency. Such an object is achieved by providing a combined light emitting device wherein a specific complex having a rare earth ion, particularly an Eu (europium) ion, as the central ion, is borne by a transparent solid matrix such as polymer or plastic, and this rare earth complex is excited by an InGaN based blue light emitting diode or by a semiconductor laser utilizing a light emitting layer of InGaN based material. A combination of such a blue light emitting diode, a YAG yellow fluorescent material and such an Eu complex for red light allows for the formation of a white light source with high color rendering property.

Abstract: A crystalline rare-earth oxide or sulfide which has an average particle diameter of 10 nm or less and in which the rare-earth element has a low valance, in particular, crystalline EuO or EuS of nano size. The rare-earth oxide or sulfide is produced by irradiating an inorganic acid salt or organic acid salt of a rare-earth element having a high valence with a light in the range of from UV to visible light in the presence of: a compound which, upon irradiation with the light in the range of from UV to visible light induces a photooxidation-reduction reaction and simultaneously converts the rare-earth ions having a high valence into ions having a low valence; and a cholagen source compound which immediately reacts with the low valence ions to form a cholagen compound.

Abstract: The present invention provides an optically functional material comprising a rare-earth complex represented by the formula (I) wherein M is a rare-earth atom, n1 is 2 or 3, n2 is 2, 3 or 4, R is a C1-C20 group containing no H, X is a Group IVA atom, Group VA atom other than nitrogen or Group VIA atom other than oxygen, n3 is 0 or 1, and Y is C-Z′ (wherein Z′ is D, a halogen or C1-C20 group containing no H), N, P, As, Sb or Bi, or by the formula (II) wherein N, R, X, n1, n2 and n3 are as defined above.