Nonconventional Luminescence of Copolymer‐Containing Ureido Moieties From Blue to Green
Macromolecular Chemistry and Physics,
Год журнала:
2025,
Номер
unknown
Опубликована: Июнь 3, 2025
ABSTRACT
Nonconventional
luminescent
polymers
with
nonconjugated
structures
have
attracted
much
attention
due
to
their
unique
photophysical
properties.
However,
it
remains
a
significant
challenge
develop
nonconventional
long‐wavelength
emission.
Herein,
four
types
of
copolymer‐containing
ureido
moieties,
exhibiting
fluorescence
from
the
blue
green
region,
were
synthesized
via
free
radical
polymerization.
Compared
other
polymers,
poly[(N‐allylurea)‐co‐(itaconic
anhydride)]
(PNI),
which
has
moieties
in
its
main
chain
and
maleic
anhydride
ring
as
pendant
group,
displayed
redshift
region
optimal
excitation
emission
wavelengths
438
524
nm,
respectively.
The
as‐prepared
copolymers
show
typical
characteristics
excitation‐
concentration‐dependent
Copolymer
PNI
demonstrates
remarkable
solvatochromic
effect
electron‐rich
solvents
such
DMF
DMSO,
emitting
red
upon
exposure
520
nm
light.
Moreover,
polymethyl
methacrylate
(PMMA)‐copolymer
films
are
highly
emissive,
maximum
quantum
yields
reach
up
15.8%.
This
work
not
only
proposes
strategy
for
design
materials
but
also
provides
deeper
understanding
mechanism.
Язык: Английский
Nonconventional Full-Color Luminescent Polyurethanes: Luminescence Mechanism at the Molecular Orbital Level
ACS Materials Letters,
Год журнала:
2024,
Номер
7(1), С. 24 - 31
Опубликована: Ноя. 21, 2024
The
study
of
structure–activity
relationships
is
a
top
priority
in
the
development
nontraditional
luminescent
materials.
In
this
work,
nonconjugated
polyurethanes
(PUs)
with
full-color
emission
(red,
green,
and
blue)
are
easily
obtained
by
control
diol
monomer
structure
polymerization
conditions.
Selected
monomers
introduced
single,
double,
or
triple
bond
repeating
units
into
main
chain
PUs,
order
to
understand
how
unsaturated
bonds
H-bonds
affect
their
luminescence
from
molecular
orbital
viewpoint.
Detailed
experimental
theoretical
results
show
that
PUs
have
different
temperature-dependent
behaviors
related
interplay
H-bonding,
through-space
n−π
interactions,
aggregation
properties.
potential
applications
colorful
displays,
covert
information
transmission,
multifunctional
bioimaging
been
verified.
This
work
provides
new
general
protocol
for
simple
preparation
nonconventional
fluorescent
polymers
deepens
understanding
mechanisms.
Язык: Английский
Eu‐Doped Polyurethane with Efficient Multicolor Fluorescence, Self‐Healing, Stimuli‐Responsiveness and Its Diverse Applications
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 8, 2024
Abstract
Multicolor
lanthanide‐doped
polymers
have
found
versatile
applications
in
data
encryption,
sensing,
and
smart
display.
However,
multiple
components,
sophisticated
design,
complex
preparation
procedures
are
often
required.
In
contrast,
their
intrinsic
multicolor
fluorescence
emission
is
been
effectively
used.
Herein,
Eu‐doped
polyurethane
(ETP@PU),
integrating
tunable
emission,
self‐healing,
multi‐responsiveness,
prepared
through
a
facile
route
via
step‐growth
polymerization
of
PU
using
commercial
Eu‐ligand
(Eu(TTA)
3
Phen,
ETP)
as
fluorophore.
FTIR
XPS
analysis
demonstrate
the
successful
coordination
Eu
3+
with
carbamate
groups
PU,
which
not
only
enhances
mechanical
properties
but
also
bestows
unique
luminescent
properties.
With
increasing
ETP
content,
declines,
while
that
displays
discernible
enhancement,
resulting
emission.
The
highest
quantum
yield
Eu‐related
reaches
71.3%
due
to
robust
efficient
energy
transfer
between
PU.
Moreover,
ETP@PU
exhibits
excellent
self‐healing
capacity
potential
investigated
field
light‐emitting
diodes,
process
monitoring.
This
work
provides
strategy
develop
promising
for
various
applications.
Язык: Английский