Rh-catalyzed direct arylation of a polyhedral oligomeric silsesquioxane

Conjugation of a polyhedral oligomeric silsesquioxane (POSS) with the π-electrons of functional organic units has recently attracted much attention. This is the first example of catalytic direct arylation of a POSS.

Chemical Functionalisation and Photoluminescence of Graphene Quantum Dots

Chemical modification of graphene quantum dots (GQDs) can influence their physical and chemical properties; hence, the investigation of the effect of organic functional groups on GQDs is of importance for developing GQD-organic hybrid materials. Three peripherally functionalised GQDs having a third-generation dendritic wedge (GQD-2), long alkyl chains (GQD-3) and a polyhedral oligomeric silsesquioxane group (GQD-4) were prepared by the Cu(I) -catalysed Huisgen cycloaddition reaction of GQD-1 with organic azides. Cyclic voltammetry indicated that reduction occurred on the surfaces of GQD-1-4 and on the five-membered imide rings at the periphery, and this suggested that the functional groups distort the periphery by steric interactions between neighbouring functional groups. The HOMO-LUMO bandgaps of GQD-1-4 were estimated to be approximately 2 eV, and their low-lying LUMO levels (<-3.9 eV) were lower than that of phenyl-C61 -butyric acid methyl ester, an n-type organic semiconductor. The solubility of GQD-1-4 in organic solvents depends on the functional groups present. The functional groups likely cover the surfaces and periphery of the GQDs, and thus increase their affinity for solvent and avoid precipitation. Similar to GQD-2, both GQD-3 and GQD-4 emitted white light upon excitation at 360 nm. Size-exclusion chromatography demonstrated that white-light emission originates from the coexistence of differently sized GQDs that have different photoluminescence emission wavelengths.

An experimental study on arsoles: structural variation, optical and electronic properties, and emission behavior

The attractive properties of arsoles have been theoretically studied, while experimental studies have been avoided. The practical synthesis of arsoles has realized not only the experimental proof but also novel observation.

Synthesis and properties of polyimides containing hexaisobutyl-substituted T8 cages in their main chains

We prepared two types of polyimides containing T₈ cages in the main chains by polymerization of para-substituted bis(3-aminopropyl)hexaisobutyl-substituted T₈ cage, and studied their mechanical, thermal, and optical properties.

Synthesis of a bi-functional terminal polyhedral octasilicate-core dendrimer containing carbazole and 1,8-naphthalimide, and its photoluminescence properties, film formability, and glass transition behavior

The bi-functional terminal polyhedral octasilicate (OS)-core dendrimer containing carbazole and 1,8-naphthalimide on its peripheries was synthesized and studied its photoluminescence properties, film formability, and glass transition behavior.

Facile synthesis and properties of dithieno[3,2-b:2′,3′-d]arsoles

The dithienoarsole skeleton can be safely and easily constructed, by a method superior to conventional synthetic routes. The obtained dithienoarsoles, including a main-chain type polymer, show luminescence not only in solution but also in the solid state.

Conductive casting films based on an octasilicate-core dendrimer containing the mixed-valence state TCNQ on the periphery

An imidazolium–TCNQ anion radical terminated octasilicate (OS)-core dendrimer was synthesized to form conductive films by casting with the neutral TCNQ.

Synthesis of silsesquioxane-based element-block amphiphiles and their self-assembly in water

The self-assembly of silsesquioxane-based amphiphiles in water was investigated.

A practical method for the generation of organoarsenic nucleophiles towards the construction of a versatile arsenic library

Organoarsenic nucleophiles were easily and safely prepared, leading to a practical method for As–C bond formation. Promising ligand structures such as asymmetric and bidentate types can be widely constructed by the present method.