Highlights with ‘UV/VIS’

Intramolecular 6-electron photo-redox reactions

Oxidative addition and reductive elimination reactions of small molecules possessing high-order bonds (e.g. N2, O2, NO+) is of fundamental interest in transition metal chemistry. As a means to study the mechanism and intermediates of such...

Structure of gold-oxo nanoclusters in solution

The properties of the two know polyoxoaurates in [Au4As4O20]8– and  [Au4Se4O16]4– were recently studied in a combined experimental and theoretical effort. Through combining electrospray ionization mass spectrometry (ESI-MS) and UV/VIS spectroscopy and analysis with relativistic TDDFT calculations...

Spin-orbit coupling increases dye-sensitized solar cells efficiency

The incident photon-to-current-conversion efficiency (IPCE) of dye-sensitized solar cells depends, amongst others, on the light-harvesting capabilities of the dye. In two recent studies, researchers from the Computational Lab for Hybrid/Organic Photovoltaics of CNR-ISTM Perugia, Italy,...

Agostic Isomers: different colors and structures

Researchers from PNNL have, for the first time, isolated and characterized two agostic isomers (‘agostomers’). Isomers of a cationic Mo piano stool complex, important intermediates in catalytic hydrogenation, have been separated by crystallization and can...

ADF Science papers: Actinide-Noble Gas Complexes and Au20

Recently two remarkable scientific research works using the Amsterdam Density Functional (ADF) program have been published in Science magazine by Pacific Northwest National Laboratory scientist Dr. Jun Li and his collaborators. This research involves the...

Why cooked lobsters turn red

Various newspapers and magazines in The Netherlands have reported about the recent paper ( J. Am. Chem. Soc., 127, 1438 (2005)) by a group at the University of Leiden. The team in Leiden, by a...

A 120 atom tetrahedral silver cluster modeled with ADF

Professor Christine Aikens of Kansas State University and Professor George Schatz of Northwestern University and their co-workers have collaborated on a number of works exploring the electronic spectroscopy of metal nanoparticles with time dependent density...

Modeling the 32 Electron Rule for Heavy Element Compounds

Inorganic chemists are all familiar with the “18-electron rule” for transition metal complexes.   Logically, this leads to a 32-electron rule for inner transition complexes, in which the f orbitals must also play a role....

Lithium – Ammonia solution modeled at the molecular level

In a recent edition of Angewandte Chemie, Eva Zurek, now at the University at Buffalo, along with Peter P. Edwards at the University of Oxford and Roald Hoffmann at Cornell University published a detailed computational...

A coupled TDDFT – atomistic electrodynamics model to study excitations in adsorbate-nanoparticle systems

Morton and Jensen from Penn State have developed a frequency-dependent QM/MM method, the discrete interaction model/quantum mechanics (DIM/QM) model, with which optical properties of molecules adsorbed on surfaces of nanoparticles can be studied. The response...