High Photoinitiating Efficiency of Benzothioxanthene‐Based Oxime Esters in Photopolymerization via Photocleavage and/or Single Electron Transfer under Visible Light and Sunlight
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
Язык: Английский
High Photoinitiating Efficiency of Benzothioxanthene‐based Oxime Esters in Photopolymerization via Photocleavage and/or Single Electron Transfer under Visible Light and Sunlight
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
Язык: Английский
2,3-Diaminonaphthalene-1,4-dione: Versatile precursor for the synthesis of molecular systems
Synthetic Communications,
Год журнала:
2024,
Номер
unknown, С. 1 - 24
Опубликована: Дек. 3, 2024
The
current
review
investigates
the
reactivity
of
2,3-diaminonaphthalene-1,4-dione
in
production
substituted
and
annulated
1,4-naphthoquinones.
2,3-Diaminonaphthalene-1,4-dione
has
two
adjacent
amino
functions,
allowing
for
reactions
with
a
variety
electrophilic
centers.
They
are
regarded
as
effective
chemical
reagents
capable
producing
wide
range
heterocyclic
derivatives
biological
applications
favorable
electrochemical
properties.
We
reviewed
all
available
papers
on
synthesis
1,4-naphthoquinones
via
various
electrophiles.
This
includes
reports
which
is
annulated,
yielding
heterocycles
mono-,
bi-,
tri-,
tetracyclic
rings.
divided
into
sections
based
type
annulation
system
number
heteroatoms
each
system.
Язык: Английский
Photopolymerization initiated by aggregation-induced emission (AIE) dyes: Towards design of fluorescent photocatalysts with hybridized excited state
European Polymer Journal,
Год журнала:
2025,
Номер
unknown, С. 113750 - 113750
Опубликована: Янв. 1, 2025
Язык: Английский
Recent advances on naphthoquinone-imidazolyl and naphthoquinone-thiazolyl derivatives as photoinitiators of photopolymerization
European Polymer Journal,
Год журнала:
2024,
Номер
219, С. 113401 - 113401
Опубликована: Авг. 27, 2024
Язык: Английский
High‐Performance Sunlight‐Induced Polymerized Hydrogels and Applications in 3D and 4D Printing
Small,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 18, 2024
Abstract
Currently,
there
are
only
few
reports
on
water‐soluble
photoinitiating
systems.
In
this
study,
a
highly
organic
dye
i.e.
sodium
(E)‐3,3′‐((4‐(2‐(3‐methylbenzo[
d
]thiazol‐3‐ium‐2‐yl)vinyl)phenyl)azanediyl)dipropionate
iodide,
was
synthesized
and
served
as
photoinitiator.
Notably,
initiator,
at
low
concentration
of
just
0.01
wt%,
demonstrates
high
photoinitiation
ability,
with
some
hydrogel
formulations
achieving
nearly
100%
double
bond
conversion
under
sunlight.
Photopolymerization
kinetics
were
monitored
using
Real‐Time
Fourier
Transform
Infrared.
To
explore
the
complex
chemical
principles
radical
polymerization,
UV‐visible
absorption
fluorescence
spectroscopy,
steady‐state
photolysis,
quenching
experiments
cyclic
voltammetry
employed
to
gain
comprehensive
understanding
photochemical
mechanism
involved.
Additionally,
several
characteristics
hydrogels
also
investigated
water
content,
swelling,
volume
swelling.
addition
their
excellent
capabilities,
developed
in
study
supported
3D
printing.
objects
smooth
surface
spatial
resolution
could
be
successfully
printed
direct
laser
writing.
The
fabricated
reversibly
change
shape
response
(adding
or
removing
water),
enabling
successful
4D
printing
behavior.
Furthermore,
efficient
ability
opens
new
avenues
for
sunlight‐polymerized
potential
applications
bioprinting.
Язык: Английский