1. Light Energy Accumulation from Pyrene Derivative to Tris(bipyridine)ruthenium on Clay Surface
- Author
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Daiki Morimoto, Kenji Saito, Tatsuto Yui, Masayuki Yagi, Haruya Yoshida, Shinsuke Takagi, and Keita Sato
- Subjects
Cationic polymerization ,chemistry.chemical_element ,02 engineering and technology ,Surfaces and Interfaces ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Photochemistry ,01 natural sciences ,0104 chemical sciences ,Ruthenium ,chemistry.chemical_compound ,Bipyridine ,chemistry ,Electrochemistry ,Pyrene ,Molecule ,General Materials Science ,Absorption (chemistry) ,0210 nano-technology ,Spectroscopy ,Stoichiometry ,Derivative (chemistry) - Abstract
A novel type of energy donor–acceptor system on a clay surface has been prepared. The energy transfer between an energy-donating cationic pyrene derivative (An-Py2+) and an energy-accepting tris(bipyridine)ruthenium complex (Ru2+) on the clay surface was investigated using absorption, emission, and lifetime measurements. An obvious energy transfer was observed, and one Ru2+ molecule quenched the emission from five molecules of An-Py2+ with an emission quenching efficiency of 85% on the clay surface. This suggests that the light energies absorbed by five of the An-Py2+ molecules were accumulated in the one Ru2+ molecule. Near-quantitative emission quenching was observed for stoichiometric amounts of An-Py2+ and Ru2+. The apparent quenching rate constant is approximately 1017 L mol–1 s–1, and thus the quenching rate constant is 107–108 times higher than the diffusion rate constant in a homogeneous solution.
- Published
- 2017