Efficient photosensitization of terbium ions enabled by hydrolysis of siloxy groups in ligands with specific side-chains.
We have demonstrated the first observable case of efficient energy transfer from poly-ligands to terbium ions through cross-linked siloxane in solution. The intensification of green luminescence was easily perceived by the naked eye under UV-254 nm illumination, where even the terbium dopants reached 0.1 μM. Moreover, the nano-scale fibrous structure (diameter 100-200 nm) aggregated to a micro-meter size round plate (diameter 1.1 μm). In addition, compound 1 equipped with three long tetradecyl chains in gels gained more of an advantage over the doubly tetradecylated compounds 2 and 3 in terms of energy migration to terbium ions due to side chain effects.
Department of Bioscience and Biotechnology, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan. qmwang@scnu.edu.cn
QianMing
Q
Wang
Keishiro
K
Ogawa
Yan
Y
Li
Hitoshi
H
Tamiaki
D004735:Energy Transfer; D006868:Hydrolysis; D007477:Ions / Q000737:chemistry; D008024:Ligands; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D018625:Microscopy, Atomic Force; D017319:Photosensitizing Agents / Q000737:chemistry*; D012833:Siloxanes / Q000737:chemistry; D012996:Solutions / Q000737:chemistry; D013725:Terbium / Q000737:chemistry*
D007477:Ions; D008024:Ligands; D017319:Photosensitizing Agents; D012833:Siloxanes; D012996:Solutions; D013725:Terbium