期刊
LANGMUIR
卷 31, 期 46, 页码 12736-12741出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.5b03102
关键词
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资金
- National Key Basic Research Program [2012CB626804]
- National Natural Science Foundation of China [20901022, 21171046, 21271060, 21236001]
- Tianjin Natural Science Foundation [13JCYBJC18400]
- Natural Science Foundation of Hebei Province [B2013202243]
- Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) [IRT1059]
- Educational Committee of Hebei Province [2011141, LJRC021]
We present herein an easy way to prepare novel responsive hydrogels by simply doping lanthanide complexes into a polymer hydrogel, poly(2-acrylamido-2-methyl-1-propanesulfonicacid) (PAMPSA). The resulting hybrid hydrogels can be readily processed into a range of shapes. Both the on-off luminescence switching and the healable properties are simultaneously achieved in the resulting responsive hybrid hydrogels. They exhibit effectively self-healing performance without any external stimulus and reversible on-off luminescence switching triggered by exposure to acid-base vapor. The key to this on-off luminescence switching behavior is that the protonation of the organic ligands compete with full coordination to Ln(3+) and that incomplete coordination affects the luminescence yield. The high proton strength in the resulting hydrogels makes the doped lanthanide complexes unstable, and ammonia (or triethylamine) vapor can dramatically decrease the proton strength through neutralization, driving the full coordination of the ligand to Ln(3+).
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