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Tunable chiroptical application by encapsulating achiral lanthanide complexes into chiral MOF thin films

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Abstract

Chiral metal-organic frameworks (chirMOFs) have been widely considered on enantioselective adsorption/separation, asymmetric catalysis, biological and nonlinear optical applications. However, chirMOFs are facing a great challenge in development of chiroptical thin films with circularly polarized luminescence (CPL) property. Here, we first report CPL thin films by encapsulating achiral lanthanide complexes Ln(acac)3 (Ln = EuaTbbGdc) into the pores of surface-coordinated chirMOF thin films (SURchirMOF) [Zn2(cam)2dabco]n with layer by layer (lbl) encapsulation strategy. Due to the unique combination of chiral porous MOF and adjustable luminescent complexes in the host-guest thin films, the obtained Ln(acac)3@SURchirMOF possess strong and tunable CPL property with high dissymmetry factors. The compared CPL and fluorescent lifetime results show that the advantage of this preparation strategy can effectively achieve energy transfer from Ln(acac)3 to SURchirMOF, resulting in an excellent CPL performance. This study not only provides a novel strategy to develop new types of chiral thin films but also offers an efficient approach for tunable chiroptical applications.

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Acknowledgements

This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB20000000), the National Key Research and Development Program of China (No. 2018YFA0208600), the National Natural Science Foundation of China (No. 21872148) and the Youth Innovation Promotion Association of the Chinese Academy of Sciences (No. 2018339).

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Authors and Affiliations

  1. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China

    Rui Zhai, Yihong Xiao, Zhigang Gu & Jian Zhang

  2. College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China

    Rui Zhai

  3. Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, 350108, China

    Zhigang Gu & Jian Zhang

  4. University of Chinese Academy of Sciences, Beijing, 100049, China

    Yihong Xiao, Zhigang Gu & Jian Zhang

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  1. Rui Zhai
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Correspondence to Zhigang Gu.

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Zhai, R., Xiao, Y., Gu, Z. et al. Tunable chiroptical application by encapsulating achiral lanthanide complexes into chiral MOF thin films. Nano Res. 15, 1102–1108 (2022). https://doi.org/10.1007/s12274-021-3610-x

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