Direct in Situ Conversion of Metals into Metal-Organic Frameworks: A Strategy for the Rapid Growth of MOF Films on Metal Substrates

被引:81
作者
Ji, Hoon [1 ]
Hwang, Sunhyun [1 ]
Kim, Keonmok [1 ]
Kim, CheolGi [1 ]
Jeong, Nak Cheon [1 ]
机构
[1] Daegu Gyeongbuk Inst Sci & Technol, Dept Emerging Mat Sci, Daegu 42988, South Korea
基金
新加坡国家研究基金会;
关键词
metal-organic frameworks; MOF films; in situ syntheses; conductivities; acid-base chemistry; ELECTRICAL-CONDUCTIVITY; CARBON-DIOXIDE; PROTON CONDUCTIVITY; POROUS MATERIALS; THIN-FILMS; ADSORPTION; SEPARATION; CHEMISTRY; DESIGN; ROUTE;
D O I
10.1021/acsami.6b12755
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
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.
引用
收藏
页码:32414 / 32420
页数:7
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