A phosphorescent emitter compound having a first ligand L.sub.A having a Formula I,

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is disclosed. An OLED having the compound incorporated therein is also disclosed.

Phosphorescent metal complexes comprising a pendant redox-active metallocene are disclosed. These complexes are useful as emitters for phosphorescent OLEDs.

A phosphorescent metal complex is provided, which comprises a metallic central atom M and at least one ligand coordinated by the metallic central atom M, wherein the one metallic central atom M and the ligand form a six-membered metallacyclic ring. Additionally specified are a radiation-emitting component comprising a metal complex, and a process for preparing the metal complex.

A photoelectric conversion element, a photoelectric conversion element, a dye-sensitized solar cell and a dye solution, having an electrically conductive support, a photoconductor layer containing an electrolyte, a charge transfer layer containing an electrolyte, and a counter electrode, wherein the photoconductor layer contains semiconductor fine particles carrying a metal complex dye; and wherein the metal complex dye has at least a carboxyl group and a salt of the carboxyl group, the salt being selected from the group consisting of a potassium salt, a lithium salt, and a cesium salt, and the ratio of the number of the salt of the carboxyl group divided by the total number of the carboxyl group and the salt of the carboxyl group to be found in one molecule of the metal complex dye, lying in the range of 0.1 to 0.9.

Provided are a photoelectric conversion element, a solar cell using the photoelectric conversion element, and a composition. The photoelectric conversion element includes a first electrode including a photosensitive layer, which includes a light absorbing agent, on a conductive support. The light absorbing agent includes a compound having a perovskite-type crystal structure that includes organic cations represented by the following Formulae (1) and (2), a cation of a metal atom, and an anion.

R.sup.1N(R.sup.1a).sub.3.sup.+Formula (1)

R.sup.2N(R.sup.2a).sub.3.sup.+Formula (2)

In Formulae (1) and (2), R.sup.1 represents a specific group such as an alkyl group (including a specific substituent group in a case where the number of carbons is 1 or 2), and a cycloalkyl group. R.sup.2 represents a methyl group, an ethyl group, and the like. R.sup.1a and R.sup.2a represent a specific group such as a hydrogen atom and an alkyl group.

A photoelectric conversion element has a conductive support, a photoreceptor layer containing an electrolyte, a charge carrier layer containing an electrolyte and a counter electrode, and the photoreceptor layer has semiconductor particles on which a metal complex dye represented by Formula (I) is carried.
M.sup.1(LA)(LD)(Z.sup.1).CIFormula (I) M.sup.1 represents a metal atom; Z.sup.1 represents a monodentate ligand; LA represents a tridentate ligand represented by Formula (AL-1); LD represents a bidentate ligand represented by Formula (DL-1); and CI represents a counterion necessary for neutralizing the charge. ##STR00001##

Emissive devices are provided that include a phosphorescent emitter placed within a threshold distance of an enhancement layer to achieve transient lifetimes of 200 ns or less.

The present invention relates to a process for the preparation of an optically pure (+) or (?) enantiomer of an iminium salt having the formula (I), aid process comprising the following steps: a) a reduction step of an iminium salt having the formula (II), said salt being in the form of a racemic mixture, in order to obtain a compound having the formula (III) in the form of a racemic mixture, b) a step of chiral HPLC separation of the compound of formula (III) in the form of a racemic mixture, for obtaining an optically pure (+) or (?) enantiomer compound having the formula (IV), and c) an oxidation step of the compound of formula (IV) for obtaining the compound of formula (I).

Provided are a photoelectric conversion element and a dye sensitized solar cell having a supporting substrate, a conductive layer, a power generating layer having a porous semiconductor layer onto which a metal complex dye represented by Formula (1) is adsorbed, a porous insulating layer, and a counter electrode conductive layer, in which the layers are laminated in this order on the supporting substrate, and voids that each of the power generating layer, the porous insulating layer, and the counter electrode conductive layer has are filled with an electrolyte.

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R represents a hydrogen atom, an alkyl group, or an aryl group. G represents a group represented by any one of Formulae (G-1) to (G-4). A.sup.1 to A.sup.3 each represent a hydrogen atom, a carboxyl group, or a salt thereof. At least one of A.sup.1 to A.sup.3 is a carboxyl group or a salt thereof. X.sup.1 and X.sup.2 each represent O, S, and others. R.sup.a represents an alkyl group and the like. R.sup.b to R.sup.e each represent a hydrogen atom or a substituent. na represents 1 to 3. (G-1) to (G-4) are bonded to a pyridine ring in the portion of *.

The present invention relates to fields of organic chemistry and organometallic chemistry. The present invention discloses a chain multiyne compound, a preparation method thereof and an application in synthesizing a fused-ring metallacyclic compound. A structure of the chain multiyne compound in the present invention is shown as Formula I below. The present invention also provides a preparation method of the chain multiyne compound and an application thereof in a synthesis of a fused-ring metallacyclic compound. The chain multiyne compound disclosed in the present invention has multiple functional groups and the structure of the chain multiyne compound is adjustable. The chain multiyne compound can also be used to synthesize the fused-ring metallacyclic compound efficiently. The preparation method of the chain multiyne compound disclosed in the present invention is simple, which can be used to prepare the chain multiyne compound rapidly and efficiently.

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