Intramolecular interactions of dual-chromophoric oligosilanes in the ground and excited states

Abstract

Photophysical and photochemical properties of oligosilanes were widely investigated; however, intramolecular interaction between oligosilane chromophores in the ground and excited states remains open. 1,3-Bis(permethyldecasilanyl)propane 1 was prepared to investigate the intramolecular interaction between decasilane moieties. Although the UV absorption of 1 was almost similar to that of mono-chromophoric permethyldecasilane (3), new emission band was observed besides weak normal emission of decasilane in the fluorescence spectrum of 1. The emission indicated that the two decasilane-chromophores interacted each other in the excited state.