Chinese Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 28, 2024
Comprehensive
Summary
The
construction
of
luminescent
two‐dimensional
(2D)
imine‐linked
covalent
organic
frameworks
(COFs)
is
a
formidable
challenge
due
to
the
strong
interlayer
stacking
and
bond
rotations
that
typically
suppress
intramolecular
charge
transfer
(ICT),
leading
nonradiative
energy
dissipation.
Herein,
three
COFs
with
tailored
distances
are
designed
modulate
ICT
behaviours.
targeted
COF
(TPAZ‐TPE‐COF)
achieved
significantly
enhanced
photoluminescence
quantum
yield
(PLQY)
21.22%
in
solid
state
by
restricting
rotation
enlarging
layer
distance.
This
represents
3.5‐fold
530.5‐fold
improvement
over
TPAZ‐PYTA‐COF
(6.15%),
which
has
shortened
space,
TPAZ‐PATA‐COF
(0.04%),
exhibits
rotations,
respectively.
Importantly,
TPAZ‐TPE‐COF
also
exceptional
sensing
performance
for
iron
ions,
detection
limit
at
ppb
level.
Both
experimental
theoretical
analyses
reveal
prominent
assigned
effective
suppression
pathways,
especially
those
arising
from
vibrations.
These
findings
pave
way
deliberate
2D
high
PL
intensity,
thereby
expanding
portfolio
potential
applications
optoelectronics.
ACS Materials Letters,
Journal Year:
2024,
Volume and Issue:
7(1), P. 220 - 228
Published: Dec. 13, 2024
Developing
multifunctional
adsorbents
with
exceptional
capture
performance
and
outstanding
antibiofouling
activity
is
of
great
significance
for
the
recovery
gold.
However,
most
reported
materials
only
have
a
single
adsorption
function,
which
restricts
their
practical
application
gold
extraction
from
complex
matrices.
Herein,
we
construct
series
three-component
covalent
organic
frameworks
(COFs)
good
antibacterial
All
obtained
COFs
show
high
capacities
over
1250
mg·g–1
gold,
may
be
attributed
to
specific
surface
area,
regular
pore
structure
abundant
binding
sites.
In
particular,
optimized
COF-TPTD-DHTA-TAB
gives
excellent
capacity
(2884
mg·g–1),
ultrafast
kinetics
(60
min)
distribution
coefficient
(Kd
>
4
×
105
mL·g–1).
More
importantly,
sterilization
observed
on
both
COF-TPTD-DHTA
under
visible
light
irradiation.
This
work
provides
paradigm
develop
ionic
recovery.
Chinese Journal of Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 28, 2024
Comprehensive
Summary
The
construction
of
luminescent
two‐dimensional
(2D)
imine‐linked
covalent
organic
frameworks
(COFs)
is
a
formidable
challenge
due
to
the
strong
interlayer
stacking
and
bond
rotations
that
typically
suppress
intramolecular
charge
transfer
(ICT),
leading
nonradiative
energy
dissipation.
Herein,
three
COFs
with
tailored
distances
are
designed
modulate
ICT
behaviours.
targeted
COF
(TPAZ‐TPE‐COF)
achieved
significantly
enhanced
photoluminescence
quantum
yield
(PLQY)
21.22%
in
solid
state
by
restricting
rotation
enlarging
layer
distance.
This
represents
3.5‐fold
530.5‐fold
improvement
over
TPAZ‐PYTA‐COF
(6.15%),
which
has
shortened
space,
TPAZ‐PATA‐COF
(0.04%),
exhibits
rotations,
respectively.
Importantly,
TPAZ‐TPE‐COF
also
exceptional
sensing
performance
for
iron
ions,
detection
limit
at
ppb
level.
Both
experimental
theoretical
analyses
reveal
prominent
assigned
effective
suppression
pathways,
especially
those
arising
from
vibrations.
These
findings
pave
way
deliberate
2D
high
PL
intensity,
thereby
expanding
portfolio
potential
applications
optoelectronics.
