«cluster complex»
۳۸٬۹۴۷ نتیجهTetraplatinum cluster complexes bearing hydrophilic anchors as precursors for γ-Al2O3-supported platinum nanoparticles.
Tetraplatinum cluster complexes bearing hydrophilic anchors, [Pt4(μ-OCOCH3)4(μ-OCOC6H4OH-4)4] (2a), [Pt4(μ-OCOCH3)4(μ-OCOC6H4B(OH)2-4)4] (2b), and [Pt4(μ-OCOCH3)4(μ-OCOC6H4NH2-4)4] (2c), were successfully prepared by a selective substitution reaction of four in-plane acetates of
Dihedral sieving on cluster complexes
The cyclic sieving phenomenon of Reiner, Stanton, and White characterizes the stabilizers group actions on finite sets using q-analogue polynomials. Eu Fu demonstrated a generalized cluster complexes every type q-Catalan numbers. In this paper, we exhibit dihedral phenomenon, int
Nanoscale Atomic Clusters, Complexity of
200. von Hippel AR (1956) Molecular engineering. Science 123(3191):315–317 201. von Neumann J (1956) Probabilistic Logics and the Synthesis of Reliable Organisms from Unreliable Components. In: Automata Studies. Princeton University Press, Princeton, pp 43–98 202. Waingold E, Tay
Facets of the Generalized Cluster Complex and Regions in the Extended Catalan Arrangement of Type A
In this paper we present a bijection between two well known families of Catalan objects: the set of facets of the m-generalized cluster complex ∆(An) and that of dominant regions in the m-Catalan arrangement Cat(An), where m ∈ N>0. In particular, the map which we define bijects f
Faces of Generalized Cluster Complexes and Noncrossing Partitions
Let Φ be an finite root system with corresponding reflection group W and let m be a nonnegative integer. We consider the generalized cluster complex ∆(Φ) defined by S. Fomin and N. Reading and the poset NC(m)(W ) of m-divisible noncrossing partitions defined by D. Armstrong. We g
On the enumeration of positive cells in generalized cluster complexes and Catalan hyperplane arrangements
Let Φ be an irreducible crystallographic root system with Weyl group W and coroot lattice Q̌, spanning a Euclidean space V . Let m be a positive integer and AmΦ be the arrangement of hyperplanes in V of the form (α, x) = k for α ∈ Φ and k = 0, 1, . . . ,m. It is known that the nu
Characterization of Catalytically Active Octahedral Metal Halide Cluster Complexes
Halide clusters have not been used as catalysts. Hexanuclear molecular halide clusters of niobium, tantalum, molybdenum, and tungsten possessing an octahedral metal framework are chosen as catalyst precursors. The prepared clusters have no metal–metal multiple bonds or coordinati
Catalytic Reactions over Halide Cluster Complexes of Group 5–7 Metals
Halide clusters of Group 5–7 metals develop catalytic activity above 150–250 °C, and the activity is retained up to 350–450 °C by taking advantage of their thermal stability, low vapor pressure, and high melting point. Two types of active site function: the solid Brønsted acid si
Merging Timescales and Merger Rates of Star Clusters in Dense Star Cluster Complexes
Abstract. Interacting galaxies like the famous Antennae (NGC 4038/4039) or Stephan’s Quintet (HCG 92) show considerable star forming activity in their tidal arms. High resolution images (e.g. from HST-observations) indicate that these regions consist of up to hundreds of massive
Adamantane-like cluster complexes of mixed-valent copper-copper and nickel-copper thiolates.
Square-planar copper(II) and nickel(II) derivatives of the cis-dithiolate N(2)S(2) ligand bis(N,N'-2-mercapto-2-methylpropyl)-1,5-diazocyclooctane, (bme*daco)M, nucleate four Cu(I)Cl moieties, forming M(II)(2)Cu(I)(4)S(4) clusters with unusual triply bridging thiolates, mu(3)-SR,