Versatile Inorganic Oligomer-based Photochromic Spiropyrane Gels

【Author】

Jiajia Song;Wei Duan;Yun Chen;Xiangyang Liu;State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University;College of Ocean and Earth Sciences, College of Materials, College of Physical Science and Technology, State Key Laboratory of Marine Environmental Science (MEL), Research Institute for Biomimetics and Soft Matter, Xiamen University;Department of Physics, National University of Singapore;

【Institution】

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University;College of Ocean and Earth Sciences, College of Materials, College of Physical Science and Technology, State Key Laboratory of Marine Environmental Science (MEL), Research Institute for Biomimetics and Soft Matter, Xiamen University;Department of Physics, National University of Singapore;

【Abstract】

Here we report an example of a general strategy for the immobilization of various different photochromic spiropyran molecules on eco-friendly cheap nanomatrix. The spiropyrans are encapsulated in calcium salt oligomers-based gels by centrifugation, forming an inorganic oligomer-based gelatinous photoswitchable hybrid material. Ca2+ is also used to regulate the optical properties of spiropyrans through chelation. The oligomer-based gel can not only provide the space required for photoisomerization, but also reduce the interference of the surrounding environment on the photochromic properties. Moreover, a practical paper-based and colloidal flexible substrate platform is constructed for the removal and naked-eye detection of liquid and gaseous hydrazine at room temperature based on the reactivity of the formyl group on spiropyrans loaded in Ca_3(PO_4)_2 oligomers. This general strategy can be used for other inorganic oligomer-based molecular switches and sensing systems.

【Keywords】

inorganic oligomer;;photochromic;;gels;;naked-eye detection of hydrazine

References

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