Observation of the diffusion-free intermolecular excimer of 9-methyladenine in aqueous solution by picosecond time-resolved spectroscopy |
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| Institution: | 1. Cancer Research UK Cancer Therapeutics Unit, Division of Cancer Therapeutics, The Institute of Cancer Research, London, UK;1. College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, People''s Republic of China;2. School of Electronic and Information Engineering, Sanjiang University, Nanjing 210012, People''s Republic of China;3. School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, People''s Republic of China |
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| Abstract: | Diffusion-free intermolecular excimer formation in liquid solution is observed for an aqueous solution of 9-methyladenine using the synchroscan streak camera technique. The excimer fluorescence (330 ps lifetime) appears at 380 nm, at longer wavelength than the monomer fluorescence (5 ps lifetime). The excimer is formed via a weakly coupled stacking dimer composed of ground-state monomers. |
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