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<p>Thermoresponsive luminescent organic materials have great potential for intelligent optical devices, but their applicability remains limited due to formidable challenges in achieving tunable response temperature and different colors. In this study, we developed a thermoresponsive polymer/lanthanide ion (Ln<sup>3+</sup>) complex system, enabling precise regulation of luminescence color and response temperature. The polymer was synthesized <i>via</i> copolymerization of acrylamide (Am) with 6-(3-(2-(methacryloyloxy) ethyl)ureido)picolinate (MAUP). The MAUP unit incorporates ligands capable of coordinating with Ln<sup>3+</sup> and functions as an “antenna”, absorbing incident light and efficiently transferring energy to Ln<sup>3+</sup>, leading to diverse luminescent emissions. The thermoresponsive property of the poly(Am-<i>co</i>-MAUP)/Ln<sup>3+</sup> complexes, based on the synergy of ionic coordination and hydrogen bonding, imparts the precise regulation of luminescence with temperature. The response temperature of the poly(Am-<i>co</i>- MAUP)/Ln<sup>3+</sup> complexes can be finely tuned by various factors synergistically, including polymer composition and Ln<sup>3+</sup> concentrations. Moreover, these thermoresponsive luminescent complexes enable potential applications in multi-level information encryption and visual temperature sensing.</p>

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Antenna polymeric complexes with tunable thermoresponsiveness and multicolor luminescence

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Xinzhen Fan,
  • Zhiheng Zhou,
  • Mengqi Luo,
  • Xavier Banquy,
  • Jiawei Zhang,
  • X. X. Zhu,
  • Chuanzhuang Zhao

摘要

Thermoresponsive luminescent organic materials have great potential for intelligent optical devices, but their applicability remains limited due to formidable challenges in achieving tunable response temperature and different colors. In this study, we developed a thermoresponsive polymer/lanthanide ion (Ln3+) complex system, enabling precise regulation of luminescence color and response temperature. The polymer was synthesized via copolymerization of acrylamide (Am) with 6-(3-(2-(methacryloyloxy) ethyl)ureido)picolinate (MAUP). The MAUP unit incorporates ligands capable of coordinating with Ln3+ and functions as an “antenna”, absorbing incident light and efficiently transferring energy to Ln3+, leading to diverse luminescent emissions. The thermoresponsive property of the poly(Am-co-MAUP)/Ln3+ complexes, based on the synergy of ionic coordination and hydrogen bonding, imparts the precise regulation of luminescence with temperature. The response temperature of the poly(Am-co- MAUP)/Ln3+ complexes can be finely tuned by various factors synergistically, including polymer composition and Ln3+ concentrations. Moreover, these thermoresponsive luminescent complexes enable potential applications in multi-level information encryption and visual temperature sensing.