88829-35-0Relevant academic research and scientific papers
1,8-Dipyrenylnaphthalenes: Syntheses, Molecular Structure, and Spectroscopic Properties
Wahl, Peter,Krieger, Claus,Schweitzer, Dieter,Staab, H. A.
, p. 260 - 276 (2007/10/02)
Syntheses of 1,8-dipyrenylnaphthalenes 1 - 3 are reported.The stereoisomers 1 and 2 were separated; their structural assignment is based on 1H NMR, on the optical activity of 2, and on X-ray structure analyses of 1 and 2.Kinetic parameters for the isomerisation 2 1 were determined by optical rotation measurements. - Emission spectra of 1 - 3 are discussed in comparison to monopyrenyl compounds 4 and 8.For 1 and 3 typical 'excimer-like' fluorescence is observed.The difference between 1 and 2 clearely demonstrates the dependence of excimer interactions between the pyrene units on the mutual orientation of the ?-systems involved. - On the basis of X-ray analyses the molecular structures of 1 - 3 are discussed with emphasis on ?...?-interactions between the pyrene units.
