Formation and Characterization of the Tetranuclear Scandium Nitride:  Sc₄N₄

Abstract

The scandium dimer reacts with dinitrogen in solid argon to form the previously characterized planar cyclic Sc(mu-N)2Sc molecule, with the N-N bond being completely cleaved. The cyclic Sc(mu-N)2Sc molecules dimerize on annealing to form a cubic Sc4N4 cluster with tetrahedral symmetry, which is a fundamental building block for ScN nanoparticles and crystals.

Metal Cluster Models for Heterogeneous Catalysis: A Matrix‐Isolation Perspective

“…The reactivity of metal atoms and dimers toward N 2 was reviewed in 2006 . Sc 2 , Y 2 , La 2 and Ti 2 react spontaneously with N 2 to form Sc 2 N 2 and Ti 2 N 2 to break the strong triple bond (see Scheme ) . One of the bands of the Ti 2 N 2 product in the IR spectrum is shown in Figure .…”

“…[248] Sc 2 ,Y 2 ,L a 2 and Ti 2 react spontaneously with N 2 to form Sc 2 N 2 and Ti 2 N 2 to break the strong triple bond (see Scheme14). [228][229][230][231] One of the bands of the Ti 2 N 2 product in the IR spectrum is shown in Figure 13. The bandsd ue to each isotopologue are split into three components due to the polycrystalline matrix host ("matrixs plitting").…”

“…Reactions of metal clusters have been studied with O 2 , N 2 , CO, N 2 O and H 2 O . There are only a few examples for reactions of clusters with organic molecules …”

Exploring Trimetallic Clusters Containing Alkali and Alkaline Earth Metal Atoms with High Activity for Nitrogen Activation

“…Coordination modes of N 2 on supporting atoms were found critical for N 2 activation. On bimetallic clusters, N 2 can rst obtain the adsorption intermediate of side-on:end-on and then dissociate [35,37], or it can pass through the intermediate of side-on:side-on and then dissociate [40][41][42]. On trimetallic clusters, N 2 is adsorbed on the center of the metal triangle in the form of end-on:side-on:side-on or end-on:end-on:side-on coordination modes before dissociation [43][44][45][46].…”

Characterisation of photochemically formed reactive species from kinetic and thermodynamic data using UV-Vis. Laser flash photolysis, Time resolved IR and matrix isolation techniques

“…Scandium dimers react with N 2 in an argon matrix at 6 K. 6 The previously observed Sc(m-N) 2 Sc species dimerises upon annealing and in conditions of low N 2 concentrations, to produce the cubic Sc 4 N 4 ( Fig. 1).…”