Nanomaterials,
Год журнала:
2022,
Номер
12(23), С. 4299 - 4299
Опубликована: Дек. 3, 2022
The
direct
conversion
of
sunlight
into
hydrogen
through
water
splitting,
and
by
converting
carbon
dioxide
useful
chemical
building
blocks
fuels,
has
been
an
active
area
research
since
early
reports
in
the
1970s.
Most
semiconductors
that
drive
these
photocatalytic
processes
have
inorganic
semiconductors,
but
first
report
nitride
organic
also
considered.
Conjugated
materials
relatively
extensively
studied
as
photocatalysts
for
solar
fuels
generation
over
last
5
years
due
to
synthetic
control
composition
properties.
understanding
materials'
properties,
its
impact
on
performance
underlying
factors
is
still
infancy.
Here,
we
focus
interfaces,
nanostructure
fundamental
which
significantly
contribute
photocatalysts.
In
particular,
presenting
explicit
examples
interface
polymer
with
how
it
affects
performance.
Wetting
shown
be
a
clear
factor
present
strategies
increased
wettability
conjugated
modifications
material.
Furthermore,
limited
exciton
diffusion
length
polymers
identified
affect
materials.
Addressing
this,
discuss
internal
external
surface
areas
increase
activity
production
from
water.
Advanced Functional Materials,
Год журнала:
2022,
Номер
32(16)
Опубликована: Янв. 2, 2022
Abstract
As
new
and
better
materials
are
implemented
for
organic
electrochemical
transistors
(OECTs),
it
becomes
increasingly
important
to
adopt
more
economic
environmentally
friendly
synthesis
pathways
with
respect
conventional
transition‐metal‐catalyzed
polymerizations.
Herein,
a
series
of
novel
n‐type
donor–acceptor‐conjugated
polymers
based
on
glycolated
lactone
bis‐isatin
units
reported.
All
the
synthesized
via
green
metal‐free
aldol
polymerization.
The
strong
electron‐deficient
lactone‐building
blocks
provide
low‐lying
lowest
unoccupied
molecular
orbital
(LUMO)
rigid
backbone
needed
efficient
electron
mobility
up
0.07
cm
2
V
−1
s
.
Instead,
polar
atoms
in
ethylene
glycol
side
chains
contribute
ionic
conductivity.
resulting
OECTs
exhibit
normalized
maximum
transconductance
g
m,norm
0.8
S
μC
*
6.7
F
Data
microstructure
show
that
such
device
performance
originates
from
unique
porous
morphology
together
highly
disordered
amorphous
microstructure,
leading
ion‐to‐electron
coupling.
Overall,
design
strategy
provides
an
inexpensive
polymerization
route
high‐performing
OECTs.
Organic Process Research & Development,
Год журнала:
2024,
Номер
28(4), С. 816 - 830
Опубликована: Март 14, 2024
From
the
context
of
sustainability,
contemporary
synthetic
organic
chemistry
practices
require
significant
transformation,
as
indicated
by
various
sustainability
matrices
like
atom
economy,
process
mass
intensity
(PMI),
E-factor,
and
DOZN.
These
factors
have
evidently
unveiled
inherent
inefficiencies
intrinsic
to
conventional
protocols
identified
solvents
principal
causative
agent.
In
response,
utilization
water
a
primary
reaction
medium
for
transformations
has
emerged
an
appealing
alternative.
This
approach
flourished
with
emergence
micellar
catalysis,
where
amphiphilic
molecules
alter
bulk
aqueous
medium's
solvation
properties
promote
desired
chemical
transformation
under
milder
sustainable
conditions.
After
2010,
this
technology
gained
considerable
momentum
established
foundational
framework
performing
reactions
conditions,
consequently
mitigating
dependency
on
hazardous
solvents.
perspective,
recent
advances
in
field
catalysis
will
be
discussed
industrial
applications,
along
future
directions
challenges
associated
regime.
European Journal of Organic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 5, 2025
Abstract
Cross‐coupling
technology
is
still
the
cornerstone
of
conjugated
polymer
synthesis.
However,
most
cross‐coupling
reactions
rely
on
platinum
group
metals
(e.
g.
rhodium,
palladium,
iridium
and
platinum),
supply
these
rare
expensive
metal
catalysts
at
risk,
making
use
unsustainable.
In
addition,
contamination
polymers
with
trace
metallic
another
concern,
especially
for
organic
electronics
where
products
are
used
in
devices
whose
performance
can
be
affected
by
even
′undetectable’
levels
contaminant.
pursuit
more
sustainable
chemistry
future,
various
have
been
utilized
synthesis
without
aid
transition‐metal
catalysts.
Presented
herein
a
comprehensive
overview
that
go
beyond
transition
metal‐catalysed
reactions.
We
discuss
metal‐free
strategies
methods
detail
divide
them
into
“condensation”
reactions,
“click”
other
miscellaneous
Reaction
mechanisms
key
intermediates
also
elucidated.
The
aim
to
provide
researchers
practitioners
valuable
insights
will
enable
innovate
expand
horizons
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
63(2)
Опубликована: Сен. 15, 2023
Aldol
condensation
is
a
cost-effective
and
sustainable
synthetic
method,
offering
the
advantages
of
low
complexity,
substrate
universality,
high
efficiency.
Over
past
decade,
it
has
become
popular
for
creating
next-generation
organic
functional
materials,
particularly
rigid-rod
conjugated
(semi)conductors.
This
review
focuses
on
small
molecules,
oligomers,
polymeric
(semi)conductors
synthesized
through
aldol
condensation,
with
emphasis
their
remarkable
features
in
advancing
n-type
field-effect
transistors
(OFETs),
electrochemical
(OECTs),
photovoltaics
(OPVs),
thermoelectrics
(OTEs)
as
well
NIR-II
photothermal
conversion.
Coherence
character,
optical
properties,
microstructure,
chain
conformation
are
investigated
to
understand
material-property
relationships.
Future
applications
challenges
this
area
also
discussed.
Macromolecules,
Год журнала:
2024,
Номер
57(4), С. 1779 - 1787
Опубликована: Фев. 12, 2024
Cyclic
polymers
exhibit
different
solution
and
bulk
properties
compared
to
their
linear
analogs
of
the
same
molecular
weight,
such
as
smaller
hydrodynamic
volumes
higher
glass
transition
temperatures
(Tg).
Polymers
having
boron-centered
Lewis
acids
pendent
groups
have
utility
in
sensors,
biomaterials,
dynamic
covalent
materials.
Conventional
controlled
radical
polymerization
are
most
common
routes
synthesize
with
boronate
ester
boronic
acid
functional
groups.
Herein,
we
expand
synthetic
repertoire
available
for
synthesis
by
reporting
preparation
cyclic
poly(4-ethynylphenylboronate
ester)
(c-PEPB)
ring-expansion
(REP)
4-ethynylphenylboronate
using
a
pincer-supported
tethered
tetra-anionic
tungsten
alkylidene
complex.
The
were
successfully
characterized
light
scattering
measurements,
viscometry,
thermal
analysis.
In
all
cases,
polymer
interrogation
experiments
reveal
key
differences
attributed
topology.
Deprotection
polymeric
esters
was
performed
transesterification
methylboronic
furnish
poly(4-ethynylphenyl
acid)
(c-PEPB–OH).
reversible
reaction
1,2-
1,3-diols
form
used
cross-link
c-PEPB–OH
polyol
cross-linker
gels
from
polymers.
Advanced Functional Materials,
Год журнала:
2022,
Номер
33(8)
Опубликована: Дек. 11, 2022
Abstract
Exploring
highly‐efficient
palladium
(Pd)‐based
electrocatalysts
for
the
alcohol
oxidation
reaction
(AOR)
is
crucial
yet
challenging
chemists
due
to
vague
Pd
interface
with
an
uncontrollable
electronic
environment.
Herein,
organic
heterocyclic
strategy
used
first
time
modulate
state
of
by
anchoring
nanoparticles
conjugated
microporous
polymers
(CMPs)
varied
S‐,
N‐,
O‐,
or
S,
N‐heterocycles.
Among
these
CMPs,
N‐containing
thiazole
polymer
SNC
catalyst
exhibits
current
densities
1575.0
mA
mg
−1
methanol
and
1071.0
ethanol
oxidation,
which
are
among
highest
performance
in
modulated
systems
surpass
commercial
black
catalyst.
Detailed
theory
calculations
suggest
that
although
furan
(O‐heterocycle)
OC
has
strongest
charge
transfer
(0.057
|e|)
cluster,
moderate
electron
(0.041
/SNC
heterojunction
S···N···Pd
noncovalent
interaction
shows
best
catalytic
kinetics.
Moreover,
d‐band
system
closer
volcano
vertex
than
its
counterparts.
These
results
indicate
appropriate
intensity
regulation
well‐defined
structures
may
significantly
improve
AOR
activity.
Macromolecules,
Год журнала:
2023,
Номер
56(5), С. 1875 - 1883
Опубликована: Фев. 28, 2023
Optically
active
π-conjugated
block
copolymers
are
of
considerable
significance
and
interest,
but
their
controlled
synthesis
helical
self-assembly
remain
challenging.
In
this
study,
consisting
polyfluorene
(PF)
poly(phenyl
isocyanide)
(PPI)
segments
were
facilely
prepared
in
one
pot
through
two
sequential
polymerizations.
First,
a
Pd(II)-terminated
PF
precursor
was
synthesized
via
the
Suzuki
cross-coupling
polymerization
7-bromo-9,9-dihexylfluorene-2-boronic
acid
pinacol
ester,
which
catalyzed
using
Pd(0)/t-Bu3P
system.
Then,
PF-b-PPI
with
molar
mass
narrow
dispersities
fabricated
phenyl
isocyanide
monomers
utilizing
as
catalyst.
Benefiting
from
structure
helicity
PPI
block,
resulting
could
self-assemble
into
single-handed
nanofibers.
process,
chirality
transferred
to
self-assembled
nanofibers,
thereby
endowing
them
optical
activity
excellent
circularly
polarized
luminescence
properties.
