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  • 09월 05일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제120회 대한화학회 학술발표회, 총회 및 기기전시회 Hollowing out MOFs: hierarchical micro- and mesoporous MOFs with tailorable porosity via selective acid etching [동우화인켐㈜ 포스터상]

등록일
2017년 8월 23일 15시 16분 14초
접수번호
1141
발표코드
INOR.P-72 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 19일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Inorganic Chemistry
저자 및
공동저자
Jaehyoung Koo, In-Chul Hwang1, Xiujun Yu1, Kimoon Kim2,*
Chemistry, Pohang University of Science and Technology, Korea
1Pohang University of Science and Technology, Korea
2Department of Chemistry, Pohang University of Science and Technology, Korea

With increasing interests on metal-organic frameworks (MOFs), post-synthetic modification method receives considerable attention to get more control over the materials, as a pre-synthesized highly porous and desirable framework can be chosen for further modification to fine tune the pore environment without disrupting the framework topology. In 2009, we reported the complete exchange of framework-constituting metal ions from microporous frameworks keeping the original framework topology intact. Extending this work, recently we have demonstrated a partial removal of metal ions of MOFs can generate larger pores with preserving the original microporous framework. As a first example, we presented a post-synthetic transformation from microporous MOF to hierarchical micro- and mesoporous MOF. This unique transformation is achieved by treating microporous MOF POST-66 with water. However, this method is only applicable to MOFs with low water stability and fine-tuning of pore size still needs to be addressed. Here, we report a new novel strategy for the synthesis of water-stable hierarchical porous MOFs by a selective acid etching process (Scheme 1). The process is controlled by the size-selective diffusion of acid molecules through the MOF windows. This method enables the fine-tuning of the porosity of hierarchical MOFs, allowing for the generation of well-defined mesopores with high mesopore volume. Because of the size-selective diffusion of acid molecules, the inherent crystallinity and external morphology of the resulting MOFs are well-maintained after acid treatment. This novel strategy may provide an alternate route towards the synthesis of diverse hierarchical MOFs.


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