Ligand-Controlled Selective Synthesis of Indoles and Benzofurans from Secondary Anilines.

A ligand-controlled method for the selective synthesis of indoles and benzofurans from secondary anilines has been discovered. A six-ring palladacycle intermediate may be involved in this process by olefins as a transient directing mediator to give indoles. The indole/benzofuran ratio can be easily tuned by the MPAA ligand.

Sensitive detection of uric acid based on low-triggering-potential cathodic luminol electrochemiluminescence achieved by ReS nanosheets.

The majority of previously reported cathodic electrochemiluminescence (ECL) systems often required very negative potential to be carried out, which has greatly limited their applications in the sensing field. Screening high-performance cathodic ECL systems with low triggering potential is a promising way to broaden their applications. In this work, rhenium disulfide nanosheets (ReS NS) have been revealed as an efficient co-promoter to realize low-triggering-potential cathodic luminol ECL.

Ligand-Enabled -Selective C-H Olefination of Tertiary Aniline Derivatives.

A highly -selective C-H olefination of tertiary anilines without a directing group was developed. This reaction tolerated various substituted arenes and olefin coupling partners, affording -olefination products in moderate to good yields. Preliminary mechanistic studies showed that -Ac-d-Ala, AgCO, and BQ were the key factors for tuning the regioselectivity from to .

Coreactant-free strong Ru(bpy) ECL at ionic liquid modified electrode and its application in sensitive detection of glucose based on resonance energy transfer.

In this work, we have realized the strong anodic ECL emission of Ru(bpy) at ionic liquid (N-butylpyridinium tetrafluoroborate) modified electrode without additional coreactant. Methylene blue (MB) could accept the energy of Ru(bpy) ECL to construct resonance energy transfer (ECL-RET) system, leading to the decrease of ECL signal. In the presence of glucose oxidase, hydrogen peroxide generated from the oxidation process of glucose could oxidize MB and block the ECL-RET route, resulting in the recovery of ECL signal.

Electrogenerated chemiluminescence of Ru(bpy) at MoS nanosheets modified electrode and its application in the sensitive detection of dopamine.

Electrogenerated chemiluminescence (ECL) of Ru(bpy) was studied at a MoS nanosheets modified glassy carbon electrode (MoSNS/GCE) in neutral condition. Electrochemical results revealed that MoS nanosheets could significantly catalyze the electrochemical oxidation of Ru(bpy), as a result, strong anodic ECL was obtained. Several impact factors, such as the modified amount of MoS nanosheets suspension, the pH value, and the concentration of Ru(bpy), were investigated to obtain the optimal experimental condition.