화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.25, No.6, 591-598, June, 2017
DOI10.1007/s13233-017-5110-0  Export Citation
Synthesis, Characterization and Photophysical Behavior of Heteroleptic Ruthenium-Complexed Ladder-Like Structured Polysilsesquioxanes
Anil Reddy Marri1, Kie Yong Cho1, 2, Albert S. Lee1, Hyun-Ji Kim1, Do Xuan Huy1, 3, Seung Sang Hwang1, and Kyung-Youl Baek1, 3, †
  • 1Materials Architecturing Research Center, Korea Institute of Science and Technology, Seoul 02792, Korea
  • 2Center for Convergent Chemical Process, Korea Research Institute of Chemical Technology, Daejeon 34114, Korea
  • 3Division of Nano & Information Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Korea
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Heteroleptic ruthenium-complexed ladder-like structured polysilsesquioxane (LPSQ-Ru) was synthesized by post coordination reaction of bidentate ligand side chains in LPSQ with reactive Ru(II) complexes, which was well characterized by 1H and 29Si NMR, FT-IR, and spectroscopic techniques. The photophysical properties of LPSQ-Ru were examined by UV and PL analyses in both solution and solid states, comparing to analogous polymers of rutheniumcomplexed polystyrene (PS-Ru). Obtained absorptions of LPSQ-Ru and PS-Ru were broadened ranging from 390-490 nm regardless of the states. However, LPSQ-Ru exhibited higher and shaper PL emission spectrum in comparison to that of PS-Ru, particularly in the solid state, because Ru-complexes in LPSQ were much effectively isolated, preventing their aggregations due to the rigid double strained siloxane backbone. This extinguished photophysical property in LPSQ-Ru kept after intensive thermal treatment at 250 °C for 90 min, which was not achieved in PS-Ru (~5-fold decrease). These differences originated from the backbone structures were also appeared in electrochemical properties in the solid states.
Keywords:ruthenium complex;polysilsesquioxane;metallopolymers;photophysical properties;thermal stability
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