An Efficient, Modular Synthetic Route to Oligomers Based on Zirconocene Coupling: Properties for Phenylene-Thiophene-1-Oxide and Phenylene-Thiophene-1,1-Dioxide Chains This research was supported by the National Science Foundation. M.C.S. thanks the Korea Science and Engineering Foundation (KOSEF)
Angew Chem Int Ed Engl. 2000 Aug 18;39(16):2870-2873.
doi: 10.1002/1521-3773(20000818)39:16<2870::aid-anie2870>3.0.co;2-#.