Ultra long-lived electron-hole separation within water-soluble colloidal ZnO nanocrystals: Prospective applications for solar energy production

Hydrolysis of organometallic and metal–amide precursors: synthesis routes to oxo-bridged heterometallic complexes, metal-oxo clusters and metal oxide nanoparticles

“…176,178,179 This synthetic route yields ZnO NPs described as (ZnO)x(ZnL2)y(L)z (L = monoanionic ligand) with more than a single monolayer of ligands. This ligand shell is described as 'impermeable', and protects the ZnO core, which results in slow photoluminescence (electron-hole separation up to 2.2 μs) 180 , giving these NPs enhanced properties relative to ZnO from sol-gel techniques. 179 The process tolerates many different R groups upon the anionic ligand (Fig 24), for instance, the use of liquid crystalline carboxylates such as O2CC6H4OC12H25 allowed the preparation of ZnO NPs which self-assemble into free-standing thin films when compressed upon an air-water interface by the Langmuir method.…”

“…Different ligand precursors lead to NPs with a variety of properties and applications. [176][177][178][179][180][181][182][183] TEM micrograph reproduced with permission from the RSC. 177 the amount of ligand is helpful in forming composite materials, where excess ligand would affect the material properties, e.g.…”

Reaching Milestones in the Oxygenation Chemistry of Magnesium Alkyls: towards Intimate States of O2 Activation and the First Monomeric Well‐Defined Magnesium Alkylperoxide

“…Moreover, we have also emphasized the essential role of the coordination state of the oxygenated organoaluminum and organozinc compounds, as well as the geometric requirements of an O 2 molecule approaching the metal centre . Apart from the fundamental aspects, these systematic studies have advanced rational design of metal alkyl/air systems as radical initiators for organic reactions, stoichiometric and catalytic asymmetric epoxidation of enones and pave the way to well‐defined metal alkoxides (not accessible through the classical alcoholysis path) as potential initiators of cyclic esters polymerization as well as to a new approach for the preparation of semiconductor zinc oxide quantum dots based on organozinc/air systems …”

Disclosing Interfaces of ZnO Nanocrystals Using Dynamic Nuclear Polarization: Sol‐Gel versus Organometallic Approach

“…More recently, we have elaborated the one‐pot self‐supporting organometallic (OSSOM) procedure based on the controlled exposition of a [EtZn(X)]‐type precursor (X=monoanionic organic ligand) to air leading to ZnO NCs coated with an organic shell composed of surface‐anchored X‐type ligands . The OSSOM process is thermodynamically controlled and affords stable, bio‐safe and well‐passivated ZnO NCs with ultra‐long‐lived luminescence …”