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Dual-Emissive Langmuir–Blodgett Films of a 9,9-Bis(4-ethynylphenyl)fluorene Derivative of Gold(I) and Some Europium-Substituted Polyoxometalates: Preparation, Characterization and Photoelectric Properties

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Abstract

A new family of organometallic/inorganic composite Langmuir–Blodgett (LB) films consisting of the rigid-rod dinuclear gold(I) complex coordinated with 9,9-bis(4-ethynylphenyl)fluorene (denoted as Au-DPF) as the π-conjugated organometallic molecule coupled with some europium-substituted polyoxometalates (POM; POM = Na9EuW10O36, K13[Eu(SiW11O39)2] and K5[Eu(SiW11O39)(H2O)2]) as the inorganic component were prepared and characterized by π–A isotherms, UV–vis absorption and photoluminescence spectra, atomic force microscopy imaging, scanning tunneling microscopy, and surface photo-voltage spectroscopy. Luminescence spectra of the prepared hybrid LB films show that the near-white emission spectra can be obtained due to the dual-emissive nature of the mixed Au-DPF/POM blends, and POM can facilitate broad aggregate emission bands. These Au-diyne-based LB films displayed interesting electric conductivity behavior. Among them, Au-DPF/K13[Eu(SiW11O39)2] 13-layer film showed a good electrical response, with the tunneling current up to ±100 nA when the voltage was monitored between −1.3 and 1.8 V. The photovoltage response of Au-DPF/EuW22 amounts to 1.5 μV.

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Acknowledgments

Li Liu acknowledges the financial support from National Natural Science Foundation of China (20671033, 21071049) and Natural Science Foundation of Hubei Province of China (2010CDB04702). This work was also supported by the University Grants Committee Areas of Excellence Scheme (AoE/P-03/08), the Hong Kong Research Grants Council (HKBU202709 and HKUST2/CRF/10) and Hong Kong Baptist University (FRG2/09-10/091).

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Authors and Affiliations

  1. Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, People’s Republic of China

    Qiao-Min Fu, Hui Fu, Lei Hu, Li Liu & Shi-Zhong Liu

  2. Key Laboratory of Special Functional Materials, Henan University, Kaifeng, 475001, People’s Republic of China

    Zu-Liang Du

  3. Institute of Molecular Functional Materials, Areas of Excellence Scheme, University Grants Committee, Kowloon Tong, Hong Kong, People’s Republic of China

    Wai-Yeung Wong

  4. Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, People’s Republic of China

    Wai-Yeung Wong

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  1. Qiao-Min Fu
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  4. Li Liu
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  5. Shi-Zhong Liu
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Correspondence to Li Liu or Wai-Yeung Wong.

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Dedicated to the Special Issue for the First International Congress on Advanced Materials.

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Fu, QM., Fu, H., Hu, L. et al. Dual-Emissive Langmuir–Blodgett Films of a 9,9-Bis(4-ethynylphenyl)fluorene Derivative of Gold(I) and Some Europium-Substituted Polyoxometalates: Preparation, Characterization and Photoelectric Properties. J Inorg Organomet Polym 22, 97–104 (2012). https://doi.org/10.1007/s10904-011-9579-2

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