Abstract: A block copolymer includes an end group, a block that binds to the end group, and a block that does not bind to the end group. The block that does not bind to the end group contains at least one non-crosslinkable constitutional unit represented by the formula (X) and/or at least one non-crosslinkable constitutional unit represented by the formula (Z). At least one of formulas (i) XI>XII, (ii) ZI>ZII and (iii) XI+ZI>XII+ZII is satisfied when the total number of non-crosslinkable constitutional units represented by formulas (X) and (Z) in the block that does not bind to the end group are represented by XI and ZI, respectively, and the total number of non-crosslinkable constitutional units represented by formulas (X) and (Z) in the block that binds to the end group are represented by XII and ZII, respectively.

Abstract: A block copolymer includes an end group, a block that binds to the end group, and a block that does not bind to the end group. The block that does not bind to the end group contains at least one non-crosslinkable constitutional unit represented by the formula (X) and/or at least one non-crosslinkable constitutional unit represented by the formula (Z). At least one of formulas (i) XI>XII, (ii) ZI>ZII and (iii) XI+ZI>XII+ZII is satisfied when the total number of non-crosslinkable constitutional units represented by formulas (X) and (Z) in the block that does not bind to the end group are represented by XI and ZI, respectively, and the total number of non-crosslinkable constitutional units represented by formulas (X) and (Z) in the block that binds to the end group are represented by XII and ZII, respectively.

Abstract: The present invention provides a photovoltaic cell having a large short-circuit current density and a large photoelectric conversion efficiency.

Abstract: The present invention provides a photovoltaic cell having a large short-circuit current density and a large photoelectric conversion efficiency.

Abstract: A dihalobiphenyl compound represented by the formula (1): wherein A represents an amino group substituted with one or two C1-C20 hydrocarbon groups or a C1-C20 alkoxy group, R1 represents a fluorine atom, a C1-C20 alkyl group, etc., X1 represents a chlorine atom, a bromine atom or an iodine atom, an k represents an integer of 0 to 3, and a polyarylene comprising a repeating unit represented by the formula (2): wherein A, R1 and k represent the same meanings as defined above.

Abstract: An luminescent device material which is inexpensive and exhibits excellent durability in the presence of oxygen can be provided using a luminescent silver complex which has an organic multidentate ligand, particularly, a luminescent silver complex wherein the organic multidentate ligand is coordinated to a phosphorus atom, a nitrogen atom, an oxygen atom, a sulfur atom, an arsenic atom, an oxygen anion, a nitrogen anion, or a sulfur anion, or a polymer of the luminescent silver complex.

Abstract: An electrode catalyst for fuel cell, containing a multinuclear complex, in which the multinuclear complex contains 2 to 4 transition metal atoms coordinated with a ligand having 5 to 15 coordination atoms in its molecule; and an electrode catalyst for fuel cell, comprising a mononuclear metal complex containing, as a ligand, an organic compound containing two or more phenol rings and three or more aromatic heterocycles.

Abstract: Provided is a block copolymer comprising one or more segments having an acid group and one or more segments having substantially no acid group, wherein the segment having an acid group is represented by the following formula (1): wherein m represents an integer of 10 or more, Ar1, Ar2 and Ar3 each independently represent a divalent aromatic group, these divalent aromatic groups may be substituted by an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, an aryl group having 6-10 carbon atoms or an aryloxy group having 6-10 carbon atoms; at least one of Ar1 and Ar2 has an acid group, Ar3 may or may not have an acid group; Y represents —CO— or —SO2—, a plurality of Ys may be different from each other, and the segment having substantially no acid group has a repeating unit represented by the following formula (2): wherein n represents an integer of 10 or more, Ar4 and Ar5 each independently represent a divalent aromatic group, these divalent aromatic groups may be substituted

Abstract: A dihalobiphenyl compound represented by the formula (1): wherein A represents an amino group substituted with one or two C1-C20 hydrocarbon groups or a C1-C20 alkoxy group, R1 represents a fluorine atom, a C1-C20 alkyl group, etc., X1 represents a chlorine atom, a bromine atom or an iodine atom, an k represents an integer of 0 to 3, and a polyarylene comprising a repeating unit represented by the formula (2): wherein A, R1 and k represent the same meanings as defined above.