Tuning Metal-Organic Framework Nanocrystal Shape through Facet-Dependent Coordination

被引：70

作者：

Liu, Xiao-Yuan ^{[2
]}

Lo, Wei-Shang ^{[2
]}

Wu, Chunhui ^{[1
]}

Williams, Benjamin P. ^{[2
]}

Luo, Lianshun ^{[1
]}

Li, Yang ^{[2
]}

Chou, Lien-Yang ^{[1
]}

Lee, Yongjin ^{[1
]}

Tsung, Chia-Kuang ^{[2
]}

机构：

[1] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

[2] Boston Coll, Dept Chem, Merkert Chem Ctr, Chestnut Hill, MA 02467 USA

来源：

NANO LETTERS | 2020年 / 20卷 / 03期

关键词：

Shaped nanocrystals; metal-organic frameworks; coordination on MOP facets; infrared spectroscopy; molecular dynamics simulations; ZEOLITIC IMIDAZOLATE FRAMEWORKS; GAS-ADSORPTION; ZIF-8; SELECTIVITY; SIZE; NANOPARTICLES; LUMINESCENT; MORPHOLOGY; STABILITY; CATALYSIS;

D O I：

10.1021/acs.nanolett.9b04997

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We studied coordination-dependent surfactant binding on shaped MOF nanocrystals. Cetyltrimethylammonium bromide (CTAB) on the surface of ZIF-8 was used as a model system. Infrared spectroscopic analysis and molecular dynamics simulations reveal different coordination environments for Zn nodes on {100} and {110} facets, resulting in different CTAB adsorption. We found that we are able to fine-tune the ratio of {100} and {110} facets in the nanocrystals. We also observed that once the MOF nanocrystals are enclosed by pure {110} facets growth along the {100} facets is terminated because the MOF nanocrystal has no surface area for CTAB adsorption. Growth can then be reinitiated through the etching of these rhombic dodecahedral nanocrystals to form a small amount of under-coordinated sites. This work represents the first systematic study of the design principles underpinning the synthesis of shaped MOF nanocrystals.

引用

页码：1774 / 1780

页数：7