Macromolecular Rapid Communications,
Год журнала:
2023,
Номер
45(3)
Опубликована: Ноя. 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.
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
63(9), С. 3962 - 3974
Опубликована: Фев. 22, 2024
Free
radical
polymerization
initiated
under
visible
light
or
sunlight
remains
one
of
the
major
challenges
in
photopolymer
chemistry
area.
Because
low
intensity
modern
sources
(light-emitting
diodes,
LEDs)
and
mismatch
their
absorption
spectra
with
that
irradiation
sources,
commercial
usual
photoinitiators
often
exhibit
poor
efficiency
blue
sunlight.
In
this
work,
eight
naphtho[2,3-d]thiazole-4,9-dione
benzaldehyde-based
oxime
esters
were
developed
as
type
I
multicomponent
photoinitiating
systems
good
properties
region,
especially
at
405
450
nm.
Compared
to
benchmark
photoinitiator
(diphenyl(2,4,6-trimethylbenzoyl)phosphine
oxide,
TPO),
some
our
initiators
furnished
similar
better
photoinitiation
performance
than
reference
upon
exposure
LED@405
TPO,
most
newly
proposed
used
could
furnish
on
par
system
nm
LED@450
Among
interesting
results
study,
final
acrylate
function
conversions
be
obtained
during
free
trimethylolpropane
triacrylate
within
1
h
by
using
solar
when
combined
iodonium
salt
aromatic
amine.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(35)
Опубликована: Июнь 15, 2024
In
this
work,
six
benzothioxanthene-based
oxime
esters
were
employed
as
photoinitiators
for
photopolymerization
under
visible
light
(LED)
and
sunlight.
Their
abilities
to
behave
Type
I
by
mean
of
a
photocleavage
mechanism
but
also
in
multicomponent
photoinitiating
systems
with
an
iodonium
salt
(through
electron
transfer
mechanism)
both
explored
the
different
structures.
Due
their
broad
absorption
spectra
tailing
up
600
nm,
properties
systematically
tested
excitation
low-intensity
LED
at
wavelengths
405
nm
450
nm.
Additionally,
parallel
polymerization
tests
done
artificial
light,
investigated
solar
displayed
high
reactivity
France
(Western
Europe)
even
winter
conditions.
For
best
candidates
i.e.
most
reactive
structures,
direct
laser
write
experiments
carried
out,
evidencing
interest
these
Angewandte Chemie,
Год журнала:
2024,
Номер
136(35)
Опубликована: Июнь 15, 2024
Abstract
In
this
work,
six
benzothioxanthene‐based
oxime
esters
were
employed
as
photoinitiators
for
photopolymerization
under
visible
light
(LED)
and
sunlight.
Their
abilities
to
behave
Type
I
by
mean
of
a
photocleavage
mechanism
but
also
in
multicomponent
photoinitiating
systems
with
an
iodonium
salt
(through
electron
transfer
mechanism)
both
explored
the
different
structures.
Due
their
broad
absorption
spectra
tailing
up
600
nm,
properties
systematically
tested
excitation
low‐intensity
LED
at
wavelengths
405
nm
450
nm.
Additionally,
parallel
polymerization
tests
done
artificial
light,
investigated
solar
displayed
high
reactivity
France
(Western
Europe)
even
winter
conditions.
For
best
candidates
i.e.
most
reactive
structures,
direct
laser
write
experiments
carried
out,
evidencing
interest
these
Molecules,
Год журнала:
2024,
Номер
29(16), С. 3898 - 3898
Опубликована: Авг. 17, 2024
Photopolymerization
is
becoming
increasingly
popular
in
industry
due
to
its
copious
advantages.
The
vital
factor
the
entire
pre-polymerization
formulation
presence
of
photoinitiators.
Depending
on
application,
photoinitiators
have
different
features.
Hence,
scientists
are
particularly
interested
developing
new
that
can
expand
scope
applications
and
be
used
create
products
with
features
demanded
by
current
trends.
This
brief
review
summarizes
dental
materials
hydrogels
those
obtained
from
natural
synthetic
sources.
Polymers,
Год журнала:
2023,
Номер
15(21), С. 4202 - 4202
Опубликована: Окт. 24, 2023
During
the
last
decades,
multicomponent
photoinitiating
systems
have
been
focus
of
intense
research
efforts,
especially
for
design
visible
light
systems.
Although
highly
reactive
three-component
and
even
four-component
designed,
complexity
to
elaborate
such
mixtures
has
incited
researchers
monocomponent
Type
II
photoinitiators.
Using
this
approach,
photosensitizer
radical/cation
generator
can
be
combined
within
a
unique
molecule,
greatly
simplifying
elaboration
photocurable
resins.
In
field,
sulfonium
salts
are
remarkable
photoinitiators
but
these
structures
lack
absorption
in
range.
Over
years,
various
structural
modifications
carried
out
order
redshift
their
absorptions
region.
work,
an
overview
different
activable
under
reported
date
is
proposed.
