The sulfur atoms positions in three isomers play an important role in the intermolecular interactions and OFET performances.

In this research, with the assistance of scanning tunneling microscopy (STM), we observed the two-dimensional (2D) self-assembly transition of a star-shaped oligofluorene derivative (StOF) from disordered structure to honeycomb network by adjusting StOF concentration in solution. By introducing guest molecules coronene (COR), we for the first time achieved novel triangle-shaped COR trimers on liquid/highly oriented pyrolytic graphite (HOPG) interface in both honeycomb network and the disordered structure. In thermal tests, the COR/StOF-disorder system underwent a structural conformation to form well-ordered ladder structures, while the COR/StOF-honeycomb system remained the perfect hexagonal network with COR trimers included in the cavities. Density functional theory (DFT) calculations have been employed to investigate the forming mechanism of the molecular nanoarrays. These studies are expected to enhance controlling on 2D self-assembly and provide a facial approach toward constructing on-surface molecular clusters.

Driving organic reactions by heterogeneous photocatalysts is highly desired in green chemistry. (Plasmonic metal)/semiconductor heterostructures can greatly increase the photocatalytic activity by virtue of effective plasmonic harvesting of sunlight. Herein, we report on the driving of click reactions using (plasmonic Au nanosphere core)@(Cu 2 O shell) nanostructures under nearinfrared light illumination. Upon plasmon excitation, the hybrid nanostructures exhibit excellent catalytic performance for the regioselective production of 1,2,3triazoles. The yields of the click reactions under light illumination are about two times those of the reactions under sole thermal heating at the same temperatures. The reduced reaction yields in the presence of methanol, a hole scavenging agent, suggest that the plasmonic hot holes play a crucial role in the click reactions. Our results and the gained understanding will be valuable for the design of high-performance plasmonic photocatalysts for different regioselective organic reactions.

Thiol-ene click reactions are important for the construction of carbon–sulfur bonds. The use of visible-light photoredox catalysis for the formation of C–S bonds has attracted much attention. In this work,...