Nanosized Molecular Propellers by Cyclodehydrogenation of Polyphenylene Dendrimers Simpson, Christopher D. ; Mattersteig, Gunter ; Martin, Kai ; Gherghel, Lileta ; Bauer, Roland E. ; Räder, Hans Joachim ; Müllen, Klaus Abstract Publication: Journal of the American Chemical Society Pub Date: March 2004 DOI: 10.1021/ja036732j Bibcode: 2004JAChS.126.3139S