期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 47, 页码 32414-32420出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b12755
关键词
metal-organic frameworks; MOF films; in situ syntheses; conductivities; acid-base chemistry
资金
- Ministry of Science, ICT, and Future Planning (MSIP) of Korea - National Research Foundation (NRF) [NRF-2016R1A2B2014918]
- DGIST RD Program [16-HRMA-01, 16-BD-0403]
- Ministry of Science, ICT & Future Planning, Republic of Korea [16-BD-0403] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The fabrication of metal organic framework (MOP) films on conducting substrates has demonstrated great potential in applications such as electronic conduction and sensing. For these applications, direct contact of the film to the conducting substrate without a self-assembled monolayer (SAM) is a desired step that must be achieved prior to the use of MOF films. In this report, we propose an in situ strategy for the rapid one-step conversion of Cu metal into HKUST-1 films on conducting Cu substrates. The Cu substrate acts both as a conducting substrate and a source of Cu2+ ions during the synthesis of HKUST-1. This synthesis is possible because of the simultaneous reaction of an oxidizing agent and a deprotonating agent, in which the former agent dissolves the metal substrate to form Cu2+ ions while the latter agent deprotonates the ligand. Using this strategy, the HKUST-1 film could not only be rapidly synthesized within 5 min but also be directly attached to the Cu substrate. Based on microscopic studies, we propose a plausible mechanism for the growth reaction. Furthermore, we show the versatility of this in situ conversion methodology, applying it to ZIF-8, which comprises Zn2+ ions and imidazole-based ligands. Using an I-2-filled HKUST-1 film, we further demonstrate that the direct contact of the MOF film to the conducting substrate makes the material more suitable for use as a sensor or electronic conductor.
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