Six
symmetric
D-π-A-π-D
indole
derivatives
(IDs)
have
been
investigated
as
visible
light
photoinitiators
(PIs).
The
IDs,
with
different
the
electron
donor
(D),
C=C
bond
π-bridge
and
carbonyl
group
acceptor
(A),
are
type
II
PIs
owning
to
their
intermolecular
hydrogen
abstraction.
In
process
of
generating
free
radicals,
transformed
hydroxyl
alkyl
which
disrupted
large
conjugation
systems
resulted
in
color
fading.
Real
time
infrared
(RT-IR)
indicated
that
IDs
ID/N-methyldiethanolamine
(MDEA)
effectively
initiated
photopolymerization
1,
6-hexanediol
diacrylate
under
illumination.
ID-HA
containing
acrylate
double
bonds
is
expected
be
served
not
only
a
PI
but
also
crosslinker
extremely
high
migration
stability.
extraction
rate
from
polymer
films
following
30
min
illumination
was
1.0%.
has
lower
energy
excited
triplet
state
(DFT
calculations),
favorable
for
transfer
radical
generation.
Therefore,
acetonitrile
solution
completely
faded
within
15
s
illumination,
demonstrating
best
photobleaching
behavior.
Meanwhile,
polymerization
conversion
by
it
alone
could
reach
81%.
Furthermore,
47
mm
(with
96.8%
whiteness
bleaching
ratio)
55
94.5%
columns
were
obtained
respectively,
using
ID-HA/MDEA
PI.
Thus,
outstanding
performance,
stability
thermal
endow
potential
applications
deep
photopolymerization,
food
packaging
biomedicine.
Macromolecular Rapid Communications,
Journal Year:
2024,
Volume and Issue:
45(21)
Published: July 15, 2024
Abstract
Over
the
past
two
decades,
deep
eutectic
solvents
(DESs)
have
captured
significant
attention
as
an
emergent
class
of
that
unique
properties
and
applications
in
differing
fields
chemistry.
One
area
where
DES
systems
find
utility
is
design
polymeric
gels,
often
referred
to
“eutectogels,”
which
can
be
prepared
either
using
a
replace
traditional
solvent,
or
monomers
form
part
themselves.
Due
extensive
network
intramolecular
interactions
(e.g.,
hydrogen
bonding)
ionic
species
exist
systems,
eutectogels
possess
appealing
material
properties—high
adhesive
strength,
tuneable
viscosity,
rapid
polymerization
kinetics,
good
conductivity,
well
high
strength
flexibility.
In
addition,
non‐covalent
crosslinking
approaches
are
possible
due
inherent
these
materials.
This
review
considers
several
key
eutectogels,
including
organic
electronics,
wearable
sensor
technologies,
3D
printing
resins,
adhesives,
range
various
biomedical
applications.
The
design,
synthesis,
discussed,
addition
advantages
this
synthetic
approach
comparison
gel
design.
Perspectives
on
future
directions
field
also
highlighted.
Chem & Bio Engineering,
Journal Year:
2024,
Volume and Issue:
1(1), P. 76 - 82
Published: Jan. 4, 2024
Coloration
is
essential
for
enhancing
visual
aesthetics
and
facilitating
information
communication,
but
it
difficult
to
apply
highly
complex
surfaces.
Efficient
manufacturing
of
3D
printed
colored
products
particularly
challenging,
given
the
arbitrary
nature
We
accomplish
this
goal
with
3D/4D
color
printing
using
a
photoprintable
resin
containing
free
radical
initiator,
photocurable
monomers,
photoacid
generator,
an
acid-sensitive
dye.
The
initiator
activated
long
wavelength
light
(405
nm)
photoprinting.
Independently,
generator
triggered
shorter
(365
activate
dye
coloration.
This
allows
decoupling
coloration
yield
geometrically
objects
designable
surface
patterns
as
efficient
yet
simple
way
produce
objects.
Macromolecular Rapid Communications,
Journal Year:
2024,
Volume and Issue:
45(19)
Published: May 13, 2024
Abstract
Solvent‐free
photopolymerization
of
vinyl
monomers
to
produce
high
modulus
materials
with
applications
in
3D
printing
and
photoswitchable
is
demonstrated.
Polymerizable
eutectic
(PE)
mixtures
are
prepared
by
simply
heating
stirring
various
molar
ratios
N
‐isopropylacrylamide
(NIPAM),
acrylamide
(AAm)
2‐hydroxyethyl
methacrylate
(HEMA).
The
structural
thermal
properties
the
resulting
evaluated
1D
2D
NMR
spectroscopy
as
well
differential
scanning
calorimetry
(DSC)
thermogravimetric
analysis
(TGA).
UV
photocuring
kinetics
PE
via
situ
photo‐DSC
photorheology
measurements.
cure
rapidly
display
storage
moduli
that
orders
magnitude
greater
than
equivalent
copolymers
cured
an
aqueous
medium.
versatility
these
systems
demonstrated
through
addition
a
spiropyran
acrylate
monomer,
applying
formulation
stereolithography
(SLA)‐based
resin.
Due
hydrogen‐bonding
network
systems,
resin
possible
absence
crosslinkers.
RAFT
agent
reduce
average
polymer
chain
length
enables
which
retain
their
shape
can
be
dissolved
on
demand
appropriate
solvents.
