In Situ Growth of Metal鈥揙rganic Framework Thin Films with Gas Sensing and Molecule Storage Properties

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• 作者：Wei-Jin Li ; Shui-Ying Gao ; Tian-Fu Liu ; Li-Wei Han ; Zu-Jin Lin ; Rong Cao
• 刊名：Langmuir
• 出版年：2013
• 出版时间：July 9, 2013
• 年：2013
• 卷：29
• 期：27
• 页码：8657-8664
• 全文大小：515K
• 年卷期：v.29,no.27(July 9, 2013)
• ISSN：1520-5827

文摘

New porous metal鈥搊rganic framework (MOF) films based on the flexible ligand 1,3,5-tris[4-(carboxyphenyl)oxamethyl]-2,4,6-trimethylbenzene (H₃TBTC) were fabricated on 伪-Al₂O₃ substrates under solvent thermal conditions. The factors affecting the fabrication of films, such as the temperature of pre-activation and the dosage of the reagents, were investigated. Tuning the subtle factors on film fabrications, a series of MOF thin films with different morphologies and grain sizes were prepared. The morphology and grain size of the films are monitored by scanning electron microscopy (SEM). X-ray diffraction (XRD) and attenuated total reflection infrared (ATR鈥揑R) were also used to characterize the MOF films. The results indicate that the temperature of pre-activation and the dosage of the reagents are the key parameters during the process of film formation. The properties of the films, especially the sensing and sorption behavior, have been studied by an optical digital cameral and ultraviolet鈥搗isible (UV鈥搗is) spectra. The evidence shows that the films are sensitive to small organic molecules, such as methanol and pyridine. Meanwhile, the films can adsorb small dye molecules. Thus, the films may have potential applications in either organic vapor sensing or storage of small dye molecules.