Chinese Journal of Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 21, 2025
Comprehensive
Summary
Photocatalytic
synthesis
of
hydrogen
peroxide
(H
2
O
)
from
air
and
water
presents
a
sustainable
efficient
alternative
to
the
traditional
anthraquinone
method.
Therefore,
design
photocatalysts
for
H
production
are
important.
In
this
work,
we
apply
nitrogen‐site
engineering
strategy
achieve
high‐performance
by
synthesizing
three
imine‐
linked
oligo(phenylenevinylene)‐based
covalent
organic
frameworks
(OPV‐COFs)
doped
with
different
numbers
nitrogen
atoms
(denoted
as
COF‐920‐
n
N,
=
0,
1,
3).
characterization
confirmed
high
crystallinity
porosity
COFs,
critical
photocatalysis.
Each
OPV‐COF
exhibited
ability
rapidly
synthesize
using
water,
COF‐920‐1N
achieving
highest
rate
4288
μmol·g
–1
·h
under
visible
light,
higher
than
those
most
other
reported
COFs.
Mechanism
studies
demonstrated
that
introduction
pyridine
at
junction
changes
electronic
structure
electron
transfer
path
within
enhancing
photogenerated
mobility
reducing
electron‐hole
recombination.
This
study
not
only
pioneers
class
OPV‐COFs
photocatalytic
,
but
also
sets
foundational
rational
COFs
in
applications.
Chemical Society Reviews,
Год журнала:
2023,
Номер
52(22), С. 7949 - 8004
Опубликована: Янв. 1, 2023
Photocatalytic
organic
reactions,
harvesting
solar
energy
to
produce
high
value-added
chemicals,
have
attracted
increasing
attention
as
a
sustainable
approach
address
the
global
crisis
and
environmental
issues.
Reticular
framework
materials,
including
metal-organic
frameworks
(MOFs)
covalent
(COFs),
are
widely
considered
promising
candidates
for
photocatalysis
owing
their
crystallinity,
tailorable
pore
environment
extensive
structural
diversity.
Although
design
synthesis
of
MOFs
COFs
been
intensively
developed
in
last
20
years,
applications
photocatalytic
transformations
still
preliminary
stage,
making
systematic
summary
necessary.
Thus,
this
review
aims
provide
comprehensive
understanding
useful
guidelines
exploration
suitable
MOF
COF
photocatalysts
towards
appropriate
reactions.
The
commonly
used
reactions
categorized
facilitate
identification
reaction
types.
From
practical
viewpoint,
fundamentals
experimental
design,
active
species,
performance
evaluation
external
conditions,
discussed
detail
easy
experimentation.
Furthermore,
latest
advances
COFs,
composites,
comprehensively
summarized
according
actual
sites,
together
with
discussion
structure-property
relationship.
We
believe
that
study
will
be
helpful
researchers
novel
reticular
various
synthetic
applications.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(40), С. 21470 - 21497
Опубликована: Янв. 1, 2023
Various
strategies
for
improving
the
photocatalytic
performance
of
covalent
triazine
frameworks,
including
molecular
design,
structural
regulation
and
creation
heterostructures,
are
summarized.
ACS Catalysis,
Год журнала:
2024,
Номер
unknown, С. 17654 - 17663
Опубликована: Ноя. 15, 2024
The
photosynthesis
of
hydrogen
peroxide
(H2O2)
from
pure
water
and
oxygen
using
metal-free
photocatalysts
offers
a
renewable
approach
to
convert
solar
energy
storable
chemical
energy.
However,
the
efficiency
H2O2
is
often
hindered
by
rapid
recombination
photogenerated
charge
carriers.
Herein,
we
present
an
elegantly
designed
covalent
triazine
framework
(CTF)
photocatalyst,
denoted
as
Ace-asy-CTF,
with
stepwise
electron
transfer
pathway
for
highly
efficient
H2O2.
Notably,
Ace-asy-CTF
possesses
localized
excited-state
distribution
that
created
weakly
conjugated
acetenyl
units
in
asymmetric
frameworks,
revealed
transient
spectroscopies
further
supported
theoretical
calculations.
Meanwhile,
introduced
also
serve
active
sites
reduction
reaction
(ORR).
simultaneously
enhanced
two-step
2e–
ORR
result
excellent
yield
2594
μmol
g–1
h–1,
directly
produced
without
requiring
any
sacrificial
reagents.
This
work
paves
way
development
next-generation
catalysts,
providing
feasible
benchmark
stable
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 29, 2025
Photocatalytic
upcycling
of
waste
polyolefins
into
value-added
chemicals
provides
promise
in
plastic
management
and
resource
utilization.
Previous
works
demonstrate
that
can
be
converted
carboxylic
acids,
with
CO2
as
the
final
oxidation
product.
It
is
still
challenging
to
explore
more
transformation
products,
particularly
mild-oxidation
products
such
alcohols,
because
their
instability
compared
polymer
substrates,
which
are
prone
during
catalytic
reactions.
In
this
work,
we
propose
an
efficient
strategy
regulate
product
type
through
precise
control
radicals,
intermediates,
reaction
paths.
Taking
commonly
used
photocatalyst
C3N4
example,
its
major
acids
CO2.
When
MoS2
introduced
construct
a
Z-scheme
heterostructure,
gas
significantly
reduced
alcohols
appear
high
yield
1358.8
μmol
gcat-1
selectivity
up
80.3%.
This
primarily
attributed
presence
•OH
radicals
from
oxygen
reduction,
acting
key
role
alcohol
formation
while
simultaneously
suppressing
competing
pathways
•O2-
1O2,
thus
reducing
overoxidation
products.
The
β-scission
C-C
bonds
chains
generates
intermediate
alkyl
species,
followed
by
combination
produce
methanol,
energetically
favorable
for
MoS2/C3N4.
contrast,
species
couple
form
formic
acid,
C3N4.
work
new
approaches
controlling
types
offers
insights
involved
polyolefin
photorefinery.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(36), С. 25137 - 25150
Опубликована: Авг. 29, 2024
Living
crystallization-driven
self-assembly
(CDSA)
has
emerged
as
an
efficient
strategy
to
generate
nanofibers
of
π-conjugated
polymers
(CPNFs)
in
a
controlled
fashion.
However,
reports
donor–acceptor
(D–A)
heterojunction
CPNFs
are
extremely
rare.
The
preparation
these
materials
remains
challenge
due
the
lack
rational
design
guidelines
for
D–A
units.
Herein,
we
report
versatile
CDSA
based
upon
carefully
designed
D–A-co-oligomers
which
electron-deficient
benzothiadiazole
(BT)
or
dibenzo[b,d]thiophene
5,5-dioxide
(FSO)
units
attached
two
ends
oligo(p-phenylene
ethynylene)
heptamer
[BT-OPE7-BT,
FSO-OPE7-FSO].
This
arrangement
with
groups
at
oligomer
enhances
stacking
interaction
A–D–A
structure.
In
contrast,
D–A–D
structures
single
BT
middle
string
OPE
disrupt
packing.
We
employed
oligomers
terminal
alkyne
synthesize
diblock
copolymers
BT-OPE7-BT-b-P2VP
and
BT-OPE7-BT-b-PNIPAM
(P2VP
=
poly(2-vinylpyridine),
PNIPAM
poly(N-isopropylacrylamide))
FSO-OPE7-FSO-b-P2VP
FSO-OPE7-FSO-b-PNIPAM.
experiments
ethanol
were
able
length
by
both
self-seeding
seeded
growth
well
block
comicelles
precisely
tunable
composition.
Furthermore,
BT-OPE7-BT-based
core
demonstrate
photocatalytic
activity
photooxidation
sulfide
sulfoxide
benzylamine
N-benzylidenebenzylamine.
Given
scope
compositions
examined
range
formed,
believe
that
living
D–A-based
co-oligomers
opens
future
opportunities
creation
programmable
architectures
diverse
functionalities
applications.
