10.1021/acs.chemmater.7b05121.s001
Xinghua Guo
Xinghua
Guo
Yin Tian
Yin
Tian
Meicheng Zhang
Meicheng
Zhang
Yang Li
Yang
Li
Rui Wen
Rui
Wen
Xing Li
Xing
Li
Xiaofeng Li
Xiaofeng
Li
Ying Xue
Ying
Xue
Lijian Ma
Lijian
Ma
Chuanqin Xia
Chuanqin
Xia
Shoujian Li
Shoujian
Li
Mechanistic Insight into Hydrogen-Bond-Controlled
Crystallinity and Adsorption Property of Covalent Organic Frameworks
from Flexible Building Blocks
American Chemical Society
2018
monomer sources
crystallinity
adsorption performance
H-bonding interaction
lattice sizes
application values
order degree
adsorption properties
intralayer hydrogen bonds
Flexible Building Blocks
as-prepared COFs show
adsorption capacities
building blocks
Covalent Organic Frameworks
variation tendency
H-bonding effects
ultrahigh-capacity iodine adsorbents
FBB
Mechanistic Insight
Hydrogen-Bond-Controlled Crystallinity
hydrogen bonds
Adsorption Property
2018-03-19 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Mechanistic_Insight_into_Hydrogen-Bond-Controlled_Crystallinity_and_Adsorption_Property_of_Covalent_Organic_Frameworks_from_Flexible_Building_Blocks/6024011
The
effective control of crystallinity of covalent organic frameworks
(COFs) and the optimization of their performances related to the crystallinity
have been considered as big challenges. COFs bearing flexible building
blocks (FBBs) generally own larger lattice sizes and broader monomer
sources, which may endow them with unprecedented application values.
Herein, we report the oriented synthesis of a series of two-dimensional
(2D) COFs from FBBs with different content of intralayer hydrogen
bonds. Studies of H-bonding effects on the crystallinity and adsorption
properties indicate that partial structure of the COFs is “locked”
by the H-bonding interaction, which consequently improves their microscopic
order degree and crystallinity. Thus, the regulation of crystallinity
can be effectively realized by controlling the content of hydrogen
bonds in COFs. Impressively, the as-prepared COFs show excellent and
reversible adsorption performance for volatile iodine with capacities
up to 543 wt %, much higher than all previously reported adsorbents,
although the variation tendency of adsorption capacities is opposite
to their crystallinity. This study provides a general guidance for
the design and construction of highly/appropriately crystalline COFs
and ultrahigh-capacity iodine adsorbents.