Macromolecular Rapid Communications,
Journal Year:
2023,
Volume and Issue:
45(3)
Published: Nov. 13, 2023
Abstract
A
straightforward
approach
is
employed
to
synthesize
methylene‐bridged
poly(hetero
aromatic)s
based
on
furan,
pyrrole,
thiophene,
and
thiophene
derivatives.
The
process
involves
an
electrophilic
aromatic
substitution
reaction
facilitated
by
a
visible
light‐initiated
system
consisting
of
manganese
decacarbonyl
iodonium
salt.
mainly
relies
the
formation
halomethylium
cation,
attack
this
cation
heteroaromatic,
regeneration
methylium
reactivity
differences
between
heteroaromatic
cations
for
successful
polymerizations.
This
innovative
synthetic
strategy
lead
polymers
with
relatively
high
molecular
weights
as
stoichiometric
imbalance
comonomers
increased.
Accordingly,
these
newly
obtained
exhibit
remarkable
fluorescence
properties,
even
at
excitation
wavelengths
low
330
nm.
Moreover,
harnessing
halogens
chain
ends
homopolymers,
block
copolymers
are
successfully
synthesized,
offering
opportunities
tailored
applications
in
diverse
fields.
Environmental Science and Ecotechnology,
Journal Year:
2024,
Volume and Issue:
22, P. 100449 - 100449
Published: July 5, 2024
In
recent
years,
there
has
been
significant
interest
in
photocatalytic
technologies
utilizing
semiconductors
and
photosensitizers
responsive
to
solar
light,
owing
their
potential
for
energy
environmental
applications.
Current
efforts
are
focused
on
enhancing
existing
photocatalysts
developing
new
ones
tailored
uses.
Anthraquinones
(AQs)
serve
as
redox-active
electron
transfer
mediators
photochemically
active
organic
photosensitizers,
effectively
addressing
common
issues
such
low
light
utilization
carrier
separation
efficiency
found
conventional
semiconductors.
AQs
offer
advantages
abundant
raw
materials,
controlled
preparation,
excellent
capabilities,
photosensitivity,
with
applications
spanning
the
energy,
medical,
sectors.
Despite
utility,
comprehensive
reviews
AQs-based
systems
contexts
lacking.
this
review,
we
thoroughly
describe
photochemical
properties
of
photocatalysis,
particularly
key
challenges
like
clean
production,
antibacterial
action,
pollutant
degradation.
However,
face
limitations
practical
due
electrical
conductivity
solubility-related
secondary
contamination.
To
mitigate
these
issues,
design
synthesis
graphene-immobilized
highlighted
a
solution
enhance
Additionally,
future
research
directions
proposed
deepen
understanding
AQs'
theoretical
mechanisms
provide
wastewater
treatment.
This
review
aims
facilitate
mechanistic
studies
improve
technologies.
Polymer Journal,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 7, 2025
Abstract
Among
the
photoinitiators
that
can
be
activated
using
ultraviolet-visible
light-emitting
diodes,
Type
I
often
contain
sulfur,
nitrogen,
and
phosphorus
may
affect
human
health
environment,
whereas
II
typically
only
carbon,
hydrogen,
oxygen,
as
exemplified
by
anthraquinone
derivatives,
but
require
coinitiators.
Hence,
sulfur-,
nitrogen-,
phosphorus-free
are
highly
desirable.
In
our
pursuit
of
such
photoinitiators,
we
examined
ability
different
silyloxyanthraquinones
to
initiate
radical
photopolymerization
upon
irradiation
at
405
nm
found
some
achieved
high
conversion
in
absence
a
coinitiator.
The
initiation
mechanism
was
probed
analyzing
photolysis
products,
electron
spin
resonance
spectroscopy,
isotope
labeling
experiments.
1-substituted
silyloxy
compounds
acted
generating
isopropyl
radicals
initiating
species.
These
among
very
few
known
with
an
skeleton
sensitive
visible
light.
findings
this
study
facilitate
design
clean
initiators
free
commonly
present
other
initiators.
