Consolidated Curium Reprocessing Procedure Inspires Molecular Design for Sensitized Curium Circularly Polarized Luminescence.

Curium's stable redox chemistry and ability to emit strong metal-based luminescence make it uniquely suitable for spectroscopic studies among the actinide series. Targeted ligand and coordination compound design can support both fundamental electronic structure studies and industrial safeguards with the identification of unique spectroscopic signatures. However, limited availability, inherent radioactive hazards, and arduous purifications have long inhibited such investigations of this element.

High Quantum Yields from Perfluorinated Binolate Erbium Complexes and Their Circularly Polarized Luminescence.

High quantum yield and circularly polarized luminescence (CPL) brightness values are reported from Shibasaki-type erbium complexes supported by a perfluorinated Binol ligand (FBinol). The total fluorination of the ligand circumvents nonradiative quenching from C-H vibrations and leads to quantum yields of up to 11% and CPL brightness values of up to 317 M cm (a 19- and 6-fold increase, respectively, compared to (Binol)ErNa). These values are the highest values for any molecular erbium complex to date, making them comparable to Yb emitters.

Why surface hydrophobicity promotes CO electroreduction: a case study of hydrophobic polymer -heterocyclic carbenes.

We report the use of polymer -heterocyclic carbenes (NHCs) to control the microenvironment surrounding metal nanocatalysts, thereby enhancing their catalytic performance in CO electroreduction. Three polymer NHC ligands were designed with different hydrophobicity: hydrophilic poly(ethylene oxide) (PEO-NHC), hydrophobic polystyrene (PS-NHC), and amphiphilic block copolymer (BCP) (PEO--PS-NHC). All three polymer NHCs exhibited enhanced reactivity of gold nanoparticles (AuNPs) during CO electroreduction by suppressing proton reduction.

Transition-Metal Isocorroles as Singlet Oxygen Sensitizers.

Building on a highly efficient synthesis of pyrrole-appended isocorroles, we have worked out conditions for manganese, palladium, and platinum insertion into free-base 5/10-(2-pyrrolyl)-5,10,15-tris(4-methylphenyl)isocorrole, H[5/10-(2-py)TMePiC]. Platinum insertion proved exceedingly challenging but was finally accomplished with -Pt(PhCN)Cl. All the complexes proved weakly phosphorescent in the near-infrared under ambient conditions, with a maximum phosphorescence quantum yield of 0.

Vanol-Supported Lanthanide Complexes for Strong Circularly Polarized Luminescence at 1550 nm.

Strong circularly polarized luminescence (CPL) at 1550 nm is reported for lanthanide complexes supported by Vanol; these are the first examples of coordination of Vanol to lanthanides. A change in the ligand design from a 1,1'-bi-2-naphthol (in Binol) to a 2,2'-bi-1-naphthol (in Vanol) results in significantly improved dissymmetry factors for (Vanol) ErNa (|g |=0.64) at 1550 nm.

Anionic ligand-induced chirality in perovskite nanoplatelets.

Perovskite materials passivated by chiral ligands have recently shown unique chiroptical activity with promising optoelectronic applications. However, the ligands have been limited to chiral amines. Here, chiral phosphate molecules have been exploited to synthesize CsPbBr nanoplatelets.