Seon-Mi Park

Three-dimensional framework containing Mn(salen) + and Re 6 Se 8 (CN) 6 4− cluster

Abstract Three-dimensional framework material containing Mn(salen)+ units and cyano–Re6Se8 clusters was prepared, and its crystal structure was determined by X-ray crystallography. The compound crystallized in the rhombohedral space group R 3 c with a=16.1760(4) A, c=44.965(1) A, V=10189.3(4) A 3 , and Z=6. In the structure, each anionic cluster, Re6Se8(CN)64− was bridged by six Mn(salen)+ units to form a three-dimensional framework.

Eu5In2Sb6, Eu5In2−xZnxSb6: rare earth zintl phases with narrow band gaps

The new Zintl phase Eu5In2Sb6 was obtained from a direct element combination reaction in a sealed graphite tube at 870 °C and its structure was determined. It crystallizes in the orthorhombic space group Pbam(No. 55), with a unit cell of a = 12.510(3) A, b = 14.584(3) A, c = 4.6243(9) A, and Z = 2. Eu5In2Sb6 shows the Ca5Ga2As6–type structure and has a one-dimensional structure with infinite anionic double chains [In2Sb6]10− separated by Eu2+ ions. Each single chain is made of corner sharing InSb4 tetrahedra. Two such tetrahedral chains are bridged by a Sb2 group to form double chains. The compound satisfies the classical Zintl concept and is a narrow band gap semiconductor. The substitution of Zn for In atoms in Eu5In2Sb6 resulted in an increase in hole concentration and the material is more metallic. Polycrystalline ingots of Eu5In2Sb6 and Eu5In2−xZnxSb6 showed electrical conductivity of ∼36 S cm−1, ∼146 S cm−1 and Seebeck coefficient of ∼76 µV K−1and ∼51 µV K−1 at room temperature, respectively.

Synthesis and reactivity of rhenium cluster-supported manganese porphyrin complexes

Abstract The first discrete molecules of rhenium cluster-supported Mn(OEP) and Mn(TPP) complexes have been synthesized. The Mn(TPP)-containing rhenium cluster as a heterogeneous catalyst showed a high catalytic activity in the epoxidation of olefins by iodosylbenzene.

Crystal structure of the two-dimensional framework [Mn(salen)]4n[Re6Te8(CN)6]n [salen = N,N′-ethylenebis(salicylideneaminato)]

The first complex-bridged cyano–rhenium cluster framework material [Mn(salen)]4n[Re6Te8(CN)6 ]n, with a two-dimensional layered structure is prepared by the reaction of a methanol solution of [Mn(salen)]ClO4 with an aqueous solution of Na4[Re6Te8(CN)6].