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The Ir-based materials are prepared via metathesis reaction between halide and alkali metal salts of two cationic and three anionic Ir complexes and their electrochemical and photophysical characterization are described. The studies have shown that the soft salts have produced maximum external quantum efficiencies (EQE) and that the internal energy alignment between two ions in the soft salts is responsible for the disparate results

Comprehensively characterization of a generic and efficient chemical patterning method based on local plasma-induced conversion of surface functional groups on self-assembled monolayers (SAMs) is described. Spatially controlled plasma exposure realized by elastomeric poly(dimethylsiloxane) (PDMS) contact masks or channel stamps with feature sizes ranging from nanometer, micrometer, to centimeter is also presented.

A new comprehensive method to combine scanning probe microscopy (SPM) nanolithography and modified SPM break junction techniques to fabricate and characterize single molecular break junction devices is described. The newly designed approach also allowed one to eliminate, or at least minimize, the variations of experimental conditions and enabled the measurement of multiple molecules under the same experiment with exactly the same experimental conditions.

White electroluminescent (EL) emission is demonstrated from single-layered solid-state light-emitting electrochemical cells (LECs) based on host-guest cationic iridium complexes. The results have shown that white LECs based on host-guest cationic transition metal complexes is a good alterative for solid-state lighting methods.

The self-assembly, as well as the tunable plasmonic response of the highly ordered alkanethiolate-stabilized gold nanoparticle superlattices are discussed. The approach demonstrates the application of near-field coupling for the development of plasmonic crystals.

The original measurements of the single-molecule conductance of a carotenoid polyene were made by inserting the molecule into an alkanethiol self-assembled monolayer and contacting the inserted molecules either directly with a conducting atomic force microscope (AFM) probe or by using a gold nanoparticle as an intermediate contact. The electronic decay constant for carotenoid polyenes is measured, finding a value in good agreement with results of electronic structure calculations.

Pollutant treatment is critical in modern society and often requires tedious workup and expensive facilities. By virtue of structural diversity and tunability, metal-organic frameworks (MOFs) have shown promise in pollutant control. We herein report a powerful templated freeze-drying protocol for the fabrication of multifunctional MOF hollow tubular structures for both air and liquid contaminants filtration. Various hollow tube systems (e.g., "Janus", "coaxial" and "cellular") are produced. Specially, a multilayer coaxial MOF hollow tube is prepared for highly efficient capture of mixed inorganic-organic liquid contaminants with >94% filtration efficiency. Further, a "cellular" hollow tube with low pressure-drop (12 Pa, 10 cm s[sup -1]) is applied in particulate matter filtration with high efficiency (>92%). Given the rich structural and functional diversities, this protocol might bring MOFs into industrial applications to remediate environmental problems. [ABSTRACT FROM AUTHOR]