Synthesis of Pinpoint-Fluorinated Polycyclic Aromatic Hydrocarbons: Benzene Ring Extension Cycle Involving Microwave-Assisted SNAr Reaction

Fluoroarenes bearingnoelectron-withdrawing groups (non-activated fluoroarenes) readily underwent nu-cleophilic aromatic substitution with a-cyanocarbanions under microwave irradiation. The sequence (i)formylalkyla-tion involving the cyanoalkylation of fluoroarenes, (ii)di-fluorovinylidenati on, and (iii)Friedel–Crafts-typecycliza-tion, afforded extended fluoroarenes by one benzene ring per cycle. Furthermore, the performance of multiple cyclessuccessfully providedhigher-order pinpoint-fluorinated polycyclic aromatic hydrocarbons (F-PAHs)

Controlled Synthesis of Au25 Superatom Using a Dendrimer Template

Superatoms are promising materials for their potential in elemental substitution and as new building blocks. Thus far, various synthesis methods of thiol-protected Au clusters including an Au25 superatom have been investigated. However, previously reported methods were mainly depending on the thermodynamic stability of the aimed clusters. In this report, a synthesis method for thiol-protected Au clusters using a dendrimers template is proposed. In this method, the number of Au atoms was controlled by the stepwise complexation feature of a phenylazomethine dendrimer. Therefore, synthesis speed was increased compared with the case without the dendrimer template. Hybridization for the Au25 superatoms was also achieved using the complexation control of metals