Abstract: In order to provide an organic compound that can be suitably used as a luminescent material for a display, and an organic light emitting device containing such an organic compound, an organic compound in accordance with an embodiment of the present invention has a lone electron-pair and a ? E electron orbit, and in the organic compound, an energy gap ?EST obtained by subtracting an energy level ET1 of a lowest triplet excitation state T1 from an energy level ES1 of a lowest singlet excitation mode S1 is ?0.20 eV??EST<0.0090 eV.

Abstract: Provided is a novel nanoparticle, a contrast agent for magnetic resonance imaging containing the same, and a ligand compound used for production of the nanoparticle. The present invention relates to a nanoparticle including: a metal particle containing iron oxide; and a ligand which is bound to a metal atom on a surface of the metal particle and is represented by formula (3): where m is an integer of 1 to 4, and a broken line represents a coordinate bond with a metal atom on the surface of the metal particle.

Abstract: Provided is a novel nanoparticle, a contrast agent for magnetic resonance imaging containing the same, and a zwitterionic ligand compound used in production of the nanoparticle. The contrast agent for MRI of the present invention can be suitably used as a contrast agent for MRI in a medical field. The nanoparticle and the zwitterionic ligand compound of the present invention are applicable to various pharmaceutical compositions and the like, including a contrast agent for MRI, and can be used widely in the fields of pharmaceuticals, biotechnology, and the like, including various diagnosis methods and examination reagents.

Abstract: Provided is a novel nanoparticle, a contrast agent for magnetic resonance imaging containing the same, and a ligand compound used for production of the nanoparticle. The present invention relates to a nanoparticle including: a metal particle containing iron oxide; and a ligand which is bound to a metal atom on a surface of the metal particle and is represented by formula (3): where m is an integer of 1 to 4, and a broken line represents a coordinate bond with a metal atom on the surface of the metal particle.

Abstract: In order to provide g-C3N4 capable of being simply and easily handled, a g-C3N4 film is produced by heating, as a starting material, a compound represented by X+mYm?, wherein X+ is a guanidium ion or the like ion, and Ym? is an anion, to vaporize the compound or its reactant, and depositing the compound or the reactant over a surface of a base material heated, the surface carrying negative electric charges or having ? electrons, so that the compound or the reactant is polymerized on the base material to generate g-C3N4.

Abstract: In order to provide g-C3N4 capable of being simply and easily handled, a g-C3N4 film is produced by heating, as a starting material, a compound represented by X+mYm?, wherein X+ is a guanidium ion or the like ion, and Ym? is an anion, to vaporize the compound or its reactant, and depositing the compound or the reactant over a surface of a base material heated, the surface carrying negative electric charges or having ? electrons, so that the compound or the reactant is polymerized on the base material to generate g-C3N4.