The efficient and economical preparation of functional composite film materials is one of the difficulties in the development of new types of film materials. In particular, the preparation and application of optical functional composite films also require vigorous development.
Recently, the research team led by Zhang Jian, a researcher at the State Key Laboratory of Structural Chemistry of the Fujian Institute of Materials Structure, the Chinese Academy of Sciences, successfully synthesized optical MOF thin-film materials loaded with ultra-small carbon nanolattices. Because of their high chemical stability, low toxicity, good biocompatibility and excellent photophysical properties, carbon nano-dots (CDs) have a wide range of applications in catalysis, fluorescence, sensing and bioimaging. The research team innovatively used the significant difference in the carbonization temperature between the MOF material and the glucose molecules to realize the recombination of carbon nanodots and MOF materials. Generally, the carbonization temperature of the MOF material needs to exceed 500 degrees Celsius, while the carbonization temperature of the glucose molecules is about 200 degrees Celsius. Therefore, the glucose-loaded MOF material maintains the skeleton structure at 200 degrees Celsius, but the glucose is limited by the carbonization behavior at the carbon nano-dots in the MOF pores, thereby obtaining a uniformly dispersed CDs@MOF composite. The size of the carbon nanodots can be controlled by selecting MOFs with different pore structures. The prepared carbon nano-dots supported MOF films not only have good morphology and optical transparency, but also exhibit band-adjustable photoluminescence effect and optical limiting effect. This work achieved controllable synthesis of ultra-small carbon nanolattices in MOF templates, and developed a new CDs@MOF composite optical limiting material, published in German Applied Chemistry (Angew. Chem. Int. Ed. 2017). , DOI: 10.1002/anie.201702162).
In the same period, the research team prepared porphyrin-based PIZA-1 thin film materials (Small, 2017, 1, 1604035) that can selectively detect volatile organic compounds, and explored factors such as growth orientation, thickness, and modified substrate of MOF films for MOF. The effect of film properties has led to the development of a series of thin film materials with chiral separation and catalytic functions (Chem. Commun., 2017, 53, 1470; ACS Appl. Mater. Interfaces, 2017, 9, 7259; Inorg. Chem. , 2017, 56, 3526; Nanoscale 2017, DOI: 10.1039/C7NR02284K).
This research has won the Chinese Academy of Sciences' strategic pilot technology project (Class B), the National Fund Committee's "inorganic-organic hybrid functional material" innovation group, the National Outstanding Youth Fund, the National Natural Science Foundation Youth Project, and the Fujian Provincial Natural Science Foundation project and structure. Funding for the Outstanding Youth Project (Gu Zhigang) of the State Key Laboratory for Chemistry.
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