Synthesis of polypyridyl ruthenium complexes
with 2-(1-aryl)-1H-imidazo[4,5-f]-1,10-phenanthroline ligand and its
application for luminescent oxygen sensing

doi:10.1007/s11458-010-0103-y

Front. Chem. China

2010, Vol. 5

Issue (2) : 193-199 https://doi.org/10.1007/s11458-010-0103-y

Research articles

Synthesis of polypyridyl ruthenium complexes with 2-(1-aryl)-1H-imidazo[4,5-f]-1,10-phenanthroline ligand and its application for luminescent oxygen sensing

Shaomin JI¹,Wanhua WU¹,Wenting WU¹,Qi YANG¹,Quan WANG¹,Xin ZHANG¹,Yubo WU¹,Jianzhang ZHAO¹,Huimin GUO²,

1.State Key Laboratory of Fine Chemicals, School of Chemical Engineering, P.O. Box 40, 158 Zhongshan Road, Dalian University of Technology, Dalian 116012, China; 2.Department of Chemistry, School of Chemical Engineering, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, China;

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Abstract Polypyridyl ruthenium (Ru) complexes 1–3 were prepared. Their photophysical properties were investigated by UV-Vis absorption and luminescence emission spectra. The luminescent lifetimes of these Ruthenium complex were prolonged by more than 5 folds (t = 2.50 ms for complex 3) when compared with the parent Ru complex 1 (t = 0.45 ms). We propose that the extended luminescent lifetime of complex 3 is due to the equilibrium between ³MLCT state and the pyrene localized ³π-π^* triplet state (³IL). The luminescent O₂-sensing property of the complexes in solution and the IMPEK-C polymer film were studied, and the O₂ sensing was quantified with the two-site model. The oxygen-sensing property of the Ru complexes can be improved by 104-fold with extension of the luminescent lifetimes. For example, the quenching constant K_SV was improved from 0.0023 Torr^−1 of 1 to 0.2393 Torr^−1 for 3. Our results demonstrated a versatile approach for the preparation of Ru (II) polypyridine complexes with extended luminescent lifetimes as functional materials, for example, for luminescent oxygen-sensing applications.

Keywords phosphorescence ruthenium oxygen sensor quenching intraligand triplet state

Issue Date: 05 June 2010

Cite this article:

Shaomin JI,Quan WANG,Wanhua WU, et al. Synthesis of polypyridyl ruthenium complexes with 2-(1-aryl)-1H-imidazo[4,5-f]-1,10-phenanthroline ligand and its application for luminescent oxygen sensing[J]. Front. Chem. China, 2010, 5(2): 193-199.

URL:

https://academic.hep.com.cn/fcc/EN/10.1007/s11458-010-0103-y
https://academic.hep.com.cn/fcc/EN/Y2010/V5/I2/193

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