Hyojong Yoo

Au(core)-Ag(shell) triangular bifrustum nanocrystals were synthesized in aqueous solution using a seed-mediated approach. The formation of the Ag layer on the Au nanoprism seeds leads to structures with highly tunable dipole and quadrupole surface plasmon resonances. Discrete dipole approximation calculations show that it is the geometry of these novel structures rather than the addition of a new element that leads to the plasmon tunability. The structure and composition of these novel nanocryst

Ru(0) complexes of bis(imino)pyridine ligands, [η2-N3]Ru(η6-Ar) and {[N3]Ru}2(μ-N2), where Ar = C6H6 or C6H5Me and [N3] = 2,6-(MesNCMe)2C5H3N, react with N-heterocyclic silicon(IV) compounds to yield Ru(II) silylene complexes of the type [N3]Ru(X)(Cl){Si(NN)} (X = H, Cl, and Si(NN) = N,N‘-bis(neopentyl)-1,2-phenylenedi(amino)silylene). The activation of two groups on the silane occurs in a stepwise fashion: initial oxidative addition of a Si−X bond, followed by 1,2-migration (α-elimination) of t

Polyurethane foams (PUFs) have attracted attention as biomaterials because of their low adhesion to the wound area and suitability as biodegradable or bioactive materials. The composition of the building blocks for PUFs can be controlled with additives, which provide excellent anti-drug resistance and biocompatibility. Herein, nanosized Cu-BTC (copper(II)-benzene-1,3,5-tricarboxylate) was incorporated into a PUF via the crosslinking reaction of castor oil and chitosan with toluene-2,4-diisocyana

Numerous attempts have been made to prepare electrocatalytic nanomaterials and construct electrode systems for effective water-splitting reactions. The growth of transition metal-based heterostructures directly on specific substrates is promising for electrocatalytic applications. In the current work, nickel/iron hydroxide nanohybrids and nickel/iron/selenide nanohybrids are successfully synthesized on selected substrates such as graphite and nickel foil in solution. In particular, nickel/iron/s

Co-based MOFs are directly grown using an electrodeposited layer of Co(OH) 2 on carbon paper and converted to cobalt sulfide (Co x S y ) through a post-treatment process. The final electrode system exhibits remarkable oxygen evolution reaction performance.

NiO nanostructures with high surface area were used to fabricate urease-based NiO biosensors for urea detection.

Designing and constructing hierarchically structured materials with heterogeneous compositions is the key to developing an effective catalyst for overall water-splitting applications. Herein, we report the fabrication of hollow-structured selenium-doped nickel-cobalt hybrids on carbon paper as a self-supported electrode (denoted as Se-Ni|Co/CP, where Ni|Co hybrids consist of nickel-cobalt alloy-incorporated nickel-cobalt oxide). The procedure involves direct growth of zeolitic imidazolate framew

Well-ordered combination of defined coordination spheres and multiple types of ligands (heteroleptic) in a given structure can expand the structural complexity and functional diversity of the resulting metallosupramolecules. Such heteroleptic metallosupramolecular architectures are expected to afford advanced utility in a variety of applications. In this concise review article, recent advances in the development of multi-nuclear-cluster-based heteroleptic multiple-stranded (HLMS) metallosupramol

Low-valent Ru(0) complexes, [η(2)-N3]Ru(η(6)-Ar) (1) or {[N3]Ru}2(μ-N2) (2), where Ar = C6H6 or C6H5Me, and [N3] = 2,6-(2,4,6-(CH3)3C6H2N═CCH3)2C5H3N, activate C-H bonds in imidazolium salts to produce bis(imino)pyridyl ruthenium-(imidazolidin-2-ylidene) complexes, [N3]Ru(H)(X)(NHC) (4) (X = halides and tosylate). Formation of 4 is most likely to proceed via C-H oxidative addition, followed by anion coordination, which is expected to be a useful pathway in synthesizing new complexes with both N-