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Dual-target optical sensors assembled by lanthanide complex incorporated sol–gel-derived polymeric films

  • Original Paper: Sol-gel and hybrid materials for optical, photonic and optoelectronic applications
  • Published:
Journal of Sol-Gel Science and Technology Aims and scope Submit manuscript

Abstract

Sensors bearing functional units that could transform the chemical recognition into readable signals due to binding to single or even more targets have received much attention. Here, two F−/Cu2+ optical sensors based on lanthanide edifices were designed. The f–f forbidden transitions of lanthanide elements differ significantly from organic compounds since they exhibited favorable features such as narrow emissions and high color purity. Europium(III) complex of 2-(3-carboxyphenyl)imidazo[4,5-f]-1,10-phenanthroline (Eu-1) and europium(III) ternary complex of 2-(3-carboxyphenyl)imidazo[4,5-f]-1,10-phenanthroline and dibenzoylmethane (Eu-2) showed on–off changes in responses to the guest species. The excitation wavelength of Eu-2 could be extended to nearly visible light range, and this longer wavelength sensitisation will be useful in the selection of cheap laser sources. Generally organic complexes suffered from the instabilities in practical uses, the encapsulation of indicators into hosts will be necessary. Therefore, the lanthanide containing hybrid films which were composed of cross-linked siloxane and polymeric matrices were also prepared. The inorganic–organic film could be excited at 410 nm and demonstrated improved thermal stability. Moreover, we could detect F− and Cu2+ in aqueous mixed solution and this feature would be favorable for future uses.

Graphical Abstract

F−/Cu2+ optical lanthanide sensors were designed. The excitation wavelength of europium(III) complex with 2-(3-carboxyphenyl)imidazo[4,5-f]-1,10-phenanthroline and dibenzoylmethane (Eu-2) could be extended to nearly visible light range. Moreover, the Eu-2 doped film with cross-linked siloxane and polymeric hosts was also prepared.

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Acknowledgments

Q. M. appreciates National Natural Science Foundation of China (No. 21371063 and No. 21328503), excellent university young scholar fund of Guangdong province (Yq2013053), Science and Technology Project in Guangzhou (2014J4100054), Natural Science Foundation of Guangdong (2015A030313378) and Guangdong Science and Technology plan (2013B010403025). J. W. thanks supports from National Natural Science Foundation of China (No. 51571094) and Guangdong province fund (2014B09091505). R. Su thanks for the financial assistance of graduate school from South China Normal University (2015).

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Authors and Affiliations

  1. Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, People’s Republic of China

    Yuhui Zheng

  2. School of Chemistry and Environment, South China Normal University, Guangzhou, 510006, People’s Republic of China

    Rong Su, Surong Deng, Ruhe Zhang & Yuhui Zheng

  3. Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, Guangzhou, 510006, People’s Republic of China

    Yuhui Zheng

  4. Institute for Advanced Materials, Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, People’s Republic of China

    Jinwei Gao

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  1. Rong Su
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  2. Jinwei Gao
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  3. Surong Deng
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  4. Ruhe Zhang
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Correspondence to Yuhui Zheng.

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Su, R., Gao, J., Deng, S. et al. Dual-target optical sensors assembled by lanthanide complex incorporated sol–gel-derived polymeric films. J Sol-Gel Sci Technol 78, 606–612 (2016). https://doi.org/10.1007/s10971-016-3982-7

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  • DOI: https://doi.org/10.1007/s10971-016-3982-7

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