We report a facile approach to water-dispersible polydiacetylene/rare earth ions nanocomposites with reversible thermochromism. The nanocomposites were prepared by doping rare earth ions Dy3+ or Sm3+ into layer-structured 10,12-pentacosadiynoic acid (PCDA) nanoparticles to obtain PCDA/rare earth ions nanocomposites (PCDA-RE) and subsequently annealing PCDA-RE at the temperature slightly higher than the melting point of pure PCDA crystals, followed by topochemically polymerizing the annealed PCDA-RE. The polymerized PCDA-RE, i.e. poly(10,12-pentacosadiynoic acid)/rare earth ions nanocomposites (PDA-RE: PDA-Dy or PDA-Sm), are largely reversible (PDA-Sm) or even completely reversible (PDA-Dy) in the thermochromism, while, without the doping, pure PDA is completely irreversible. It is confirmed that, PDA-RE are also layer-structured with a d-spacing of 5.4 nm, higher than the d-spacing of pure PDA (4.7 nm). In PDA-RE, the rare earth ions form a layer in-between and interact strongly with the PDA bilayers, being responsible for the high degree or even the complete reversibility. This is the first example to make PDA completely reversible through the doping of rare earth ions; the annealing process is essential for the complete reversibility since it removes any defects in the structure.
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August 2014
Research Article|
August 27 2014
Nanocomposites of Polydiacetylene and Rare Earth Ions with Reversible Thermochromism
Kai-yu Fu;
Kai-yu Fu
The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science,
Fudan University
, Shanghai 200433, China
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Dao-yong Chen
Dao-yong Chen
*
The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science,
Fudan University
, Shanghai 200433, China
Search for other works by this author on:
Kai-yu Fu
Dao-yong Chen
*
The State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science,
Fudan University
, Shanghai 200433, China
*
Author to whom correspondence should be addressed. E-mail: [email protected], Tel.: +86-21-65643989
Chin. J. Chem. Phys. 27, 465–470 (2014)
Article history
Received:
April 13 2014
Accepted:
April 28 2014
Citation
Kai-yu Fu, Dao-yong Chen; Nanocomposites of Polydiacetylene and Rare Earth Ions with Reversible Thermochromism. Chin. J. Chem. Phys. 27 August 2014; 27 (4): 465–470. https://doi.org/10.1063/1674-0068/27/04/465-470
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