Abstract
The intramolecular photochemical processes excimer formation and charge-transfer (CT) complex formation were investigated by comparing the behavior of α,ω-di(1-naphthyl)permethyloligosilanes ((1-naphthyl)-(SiMe2) n -(1-naphthyl); NS n N, n = 1, 3, and 6) and 1-(1-naphthyl)permethyloligosilanes ((1-naphthyl)-(SiMe2) n -Me; NS n, n = 1, 3, and 6) by use of stationary and time-resolved fluorescence (TR-FL) measurements. Formation of excimer and CT complexes is highly dependent on the silicon chain length and polarity of the medium.
Graphical Abstract
Intramolecular excimer formation between the two naphthyl groups and charge transfer interactions between the naphthyl and silane moieties were investigated by use of a time-correlated single-photon counting method.
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Acknowledgments
This work was supported by a Grant-in-Aid for Scientific Research (no. 20550056), Scientific Research on Priority Areas (417, no. 17029013), and the G-COE program from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of the Japanese Government and the COE start-up program from Chiba University.
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Dedicated to Professor Kazuhiko Mizuno on his retirement from Osaka Prefecture University.
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Karatsu, T., Nakamura, T., Terasawa, M. et al. Time-resolved fluorescence of α,ω-di(1-naphthyl)oligosilanes and 1-naphthyloligosilanes: intramolecular excimer formation and charge-transfer interactions. Res Chem Intermed 39, 347–357 (2013). https://doi.org/10.1007/s11164-012-0653-3
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DOI: https://doi.org/10.1007/s11164-012-0653-3