A series of N-heterotriangulenes decorated with 4-pyridyl anchors were synthesized and their performance in n-type TiO2- and ZnO-based dye-sensitized solar cells investigated.

Diels-Alder cycloaddition reactions of 1,3,5-hexatriynes with tetraphenylcyclopentadienone have been performed, and mainly gave 1,2-diethynyl-3,4,5,6-tetraphenylbenzene derivatives as products. The Diels-Alder reactions were optimized under conventional heating and microwave irradiation conditions, and showed good selectivity towards the central carboncarbon triple bond of the triyne. Empirical evidence suggests

The Diels—Alder reaction of tetraphenylcyclopentadienone with triynes (I) gives fully substituted benzenes in good yields.