Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 4, 2024
Abstract
Photocatalytic
reactive
oxygen
species
(ROSs)
plays
an
important
role
in
photodynamic
therapy
and
photochemical
reactions.
However,
most
reported
photocatalysts
suffer
from
insufficient
utilization
of
visible
light
low
conversion
O
2
,
which
requires
the
development
higher
performance
catalysts
toward
practical
applications.
Herein,
a
series
porphyrin‐based
COFs
have
been
prepared.
Comparative
experimental
theoretical
studies
revealed
that
synergistic
interaction
between
two
building
blocks
can
significantly
enhance
yields
ROSs
by
independently
accomplishing
photon
harvesting
capture
with
smooth
energy
transfer
them.
Particularly,
1
yield
3P‐Por‐COF
is
increased
to
1.3
3.4
times
classical
PCN‐224
porphyrin
molecular
aggregates.
Furthermore,
TOF
as
high
271
h
−1
≈100%
selectivity
under
red
irradiation
catalyzing
thioanisole
methyl
phenyl
sulfoxide.
The
stability
degradation
toluene
gas
natural
are
also
superior
conventional
Fenton
catalytic
system.
present
results
should
contribute
design
high‐performance
frameworks‐based
for
production.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(47), P. 32161 - 32205
Published: Nov. 18, 2024
Covalent
organic
frameworks
(COFs)
are
created
by
the
condensation
of
molecular
building
blocks
and
nodes
to
form
two-dimensional
(2D)
or
three-dimensional
(3D)
crystalline
frameworks.
The
diversity
with
different
properties
functionalities
large
number
possible
framework
topologies
open
a
vast
space
well-defined
porous
architectures.
Besides
more
classical
applications
materials
such
as
absorption,
separation,
catalytic
conversions,
interest
in
optoelectronic
COFs
has
recently
increased
considerably.
electronic
both
their
linkage
chemistry
can
be
controlled
tune
photon
absorption
emission,
create
excitons
charge
carriers,
use
these
carriers
photocatalysis,
luminescence,
chemical
sensing,
photovoltaics.
In
this
Perspective,
we
will
discuss
relationship
between
structural
features
properties,
starting
connectivity,
layer
stacking
2D
COFs,
control
over
defects
morphology
including
thin
film
synthesis,
exploring
theoretical
modeling
structural,
electronic,
dynamic
discussing
recent
intriguing
focus
on
photocatalysis
photoelectrochemistry.
We
conclude
some
remarks
about
present
challenges
future
prospects
powerful
architectural
paradigm.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 7, 2025
Large
enhancement
of
nonlinear
absorption
and
refraction
are
achieved
simultaneously
in
highly
ordered
two
dimensional
(2D)
covalent
organic
framework
(COF)
films
prepared
by
solidliquid
interface
one-step
method
to
overcome
the
weakness
COF
powders
solubility.
In
intrinsic
optical
response
obtained
at
532
nm
with
5
ns
pulse,
coefficients
(β)
-4.87
×
10-5
-1.29
m
W-1,
respectively.
Simultaneously,
fitted
closed-aperture
curves
also
show
large
refractive
indexes
(n2),
-5.62
10-12
m2
W-1
-0.76
W-1.
The
4f
coherent
imaging
performed
same
condition
a
single-shot
pulse
further
verifies
outstanding
without
any
damage
probably
experienced
Z-scan
technique.
Moreover,
differences
electronic
structure
photoexcited
states
between
compared
explain
difference
response.
All
results
indicate
that
crystalline
giant
can
be
capable
modulating
both
amplitude
phase
light,
providing
huge
potential
all-optical
manipulating
switching
nanoscale
as
materials.
In
recent
years,
with
the
rapid
development
of
ultrastrong
and
ultrafast
lasers,
it
has
become
essential
to
develop
new
materials
excellent
nonlinear
optical
(NLO)
properties.
Porphyrin-based
metal-organic
frameworks
(MOFs)
have
great
potential
for
application
in
field
NLO
due
their
large
conjugated
structure
good
stability.
As
a
typical
porphyrin-based
MOF,
porphyrin
paddle-wheel
framework-3
(PPF-3)
been
prepared
applied
fields
catalysis
sensing,
yet
investigation
PPF-3
remains
unexplored.
this
study,
ZnS/PPF-3
composite
was
successfully
using
solvent
thermal
method
situ
load
ZnS
on
surface
PPF-3.
Utilizing
Z-scan
technique,
properties
ZnS,
PPF-3,
were
investigated
under
different
input
energy
intensities.
material
exhibits
significantly
enhanced
properties,
third-order
absorption
coefficient
(β
Molecules,
Journal Year:
2024,
Volume and Issue:
29(17), P. 4111 - 4111
Published: Aug. 30, 2024
The
combination
of
metal–phthalocyanine
complexes
and
axially
coordinated
organic
molecules
into
polymer
chains
presents
a
significant
challenge
in
the
synthesis
hybrid
materials.
A
calculated
structure
for
one-dimensional
coordinate
polymers
with
N-donor
ligands
using
ab
initio
(PM6)
DFT
(LanL2Dz)
methods
is
presented.
have
shown
that
there
linear,
without
distorted
geometry
two
bipyridine
ligands.
components
proposed
consist
square-planar
Zn
phthalocyanine
(PcZn)
connected
via
bridging
(L).
Electronic
properties
monomer
PcZnL
zinc
bidentate
been
analyzed
calculations
based
on
density
functional
theory
(B3LYP6-31G(d,p)).
Molecular
orbital
show
this
connection
between
metallomacrocycle
conjugated
ligand
results
small
energy
gap,
promising
molecularly
active
materials
as
conductors.
crystallographic
reports
indicate
obtaining
kind
participation
Pc
possible.
The Journal of Physical Chemistry A,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 12, 2024
Modern
approaches
to
the
design
of
nonlinear
optical
materials
often
rely
on
computational
techniques.
Here,
we
discuss
effects
variation
in
center
tetrel
atoms,
Tt
=
C,
Si,
or
Ge,
a
series
covalent
organic
frameworks
COF-102
family.
The
halogen
substitution,
Hal
Cl,
Br,
I
intramolecular
bonding
are
also
discussed.
characteristics
calculated
electron
density
have
been
implemented
describe
features
distribution
around
central
fragment
involving
tetrahedral
atom.
effect
atom
leads
dramatic
change
character
delocalization
Tt-C
