Journal of Macromolecular Science Part A,
Journal Year:
2023,
Volume and Issue:
61(1), P. 11 - 18
Published: Nov. 25, 2023
Perylene
diimides
(PDI)
are
known
for
their
excellent
performance
and
stability
as
dyes
used
in
photovoltaics
optoelectronic
devices.
Herein
we
report
photo-liability
the
presence
of
radicals.
Such
properties
can
be
utilized
to
create
light-induced
fluorescent
patterns
photochromic
sensors.
Cascade
reactions
involved
photo-induced
formation
patterns:
radicals
generated
from
photoinitiators
(PIs)
upon
UV
irradiation,
which
degrades
PDI
then
couples
yield
new
fluorophores
with
distinctive
emissions
PDI.
The
process
is
fast
spatial-selective.
Therefore,
envision
application
potential
this
fabrication
various
materials.
Carbon
dots
(CDs)
are
an
emerging
type
of
fluorescent
carbon
nanomaterial
with
broad
application
prospects.
Among
them,
photochromic
CDs
have
been
widely
used
in
the
field
optoelectronic
devices
but
rarely
ultraviolet
(UV)
detection.
In
this
work,
we
successfully
developed
that
exhibit
reversible
emission
under
light
stimulation
amine
solvent
system.
Notably,
showed
ultrafast
behavior
diethylamine
solvent,
shifting
fluorescence
color
from
cyan-green
to
orange-red
after
2
s
irradiation,
solution
changing
pale
yellow
purple.
Furthermore,
performance
could
recover
without
additional
stimuli,
simply
by
standing
for
several
tens
seconds.
Structural
analysis
indicated
rapid
photochromism
arises
changes
surface
functional
group
radicals
CDs,
reversibility
attributed
fluctuation
these
radicals.
Leveraging
excellent
properties
further
a
device
detecting
UV
indices
sunlight.
This
opens
up
prospects
developing
high-performance
detection
based
on
CDs.
Chemical Communications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Charge-assisted
photochromic
iHOF-51
enables
fast
stimulus-responsive
behavior
through
photogenerated
anionic
radicals.
Time-dependent
photochromism
in
the
powder
form
and
FRET-based
photoluminescence
composite
membranes
are
observed.
Precision Chemistry,
Journal Year:
2025,
Volume and Issue:
3(4), P. 221 - 230
Published: Feb. 20, 2025
Stimuli-responsive
smart
materials,
as
an
emerging
material,
can
fulfill
reversible
transformation
of
chemical/physical
properties
under
external
stimuli
such
mechanical
stress,
light,
and
electricity,
which
has
the
highlights
rapid
response,
designable
structure,
function.
Two
ionic
hydrogen-bonded
organic
frameworks
(iHOFs
36-37)
were
synthesized
by
self-assembly
bis(benzene-o/p-sulfonic
acid)-naphthalenediimide
(o/p-H2BSNDI)
two
basic
ligands.
The
naphthalenediimide
(NDI)
was
introduced
into
material
to
equip
iHOFs
36-37
with
radical-driven
photochromic
behavior.
proton
conductivity
iHOF-37
demonstrated
a
maximum
6.50
×
10-4
S·cm-1
at
98%
RH
100
°C,
it
increased
9.10
10-3
due
dual
free
radical
synergism
following
UV
irradiation
(NDI
viologen),
represents
significant
14-fold
enhancement.
Furthermore,
incorporation
chitosan
(CS)
matrix
forms
composite
membranes.
5%-iHOF-37/CS
membrane
reached
up
5.70
10-2
90
8.08
after
irradiation.
This
work
reveals
radicals
generated
NDI
viologen
derivatives,
whose
synergistic
action
plays
role
in
enhancing
membranes,
rendering
rational
design
stimuli-responsive
materials
feasible.
The Journal of Physical Chemistry B,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 14, 2025
A
peptide-linked
naphthalene
diimide
(PNDI)
forms
a
nanospherical
architecture
in
water
medium
its
J-type
self-assembled
state.
In
this
aggregated
state,
the
system
becomes
highly
redox-active
and
undergoes
single-electron
reduction
under
photoreactive
conditions
(λmax
=
365
nm).
The
resulting
photoreduced
red
fluorescent
radical
anions
have
significant
stability.
stability
of
anion
formation
is
dependent
upon
self-assemblies
as
it
found
that
monomeric
PNDI
molecule
fails
to
generate
photoinduced
radial
where
assembled
state
shows
good
computational
study
supports
stabilization
extra
electron
stacking
This
causes
an
increase
intermolecular
binding
energy
molecules
their
Furthermore,
photoirradiated
condition
concentration-dependent.
At
higher
concentration,
dimer
evident;
however,
at
lower
no
such
dimerization
found.
Interestingly,
stable
noncytotoxic
capable
generating
reactive
oxygen
species
(ROS)
aqueous
medium,
results
high
antibacterial
efficacy
against
both
Gram-negative
Escherichia
coli
Gram-positive
Staphylococcus
aureus
bacteria,
with
very
low
minimum
inhibitory
concentrations
(MICs)
16
30
μg/mL.
Mechanistic
studies
revealed
rupture
bacterial
cell
outer
inner
membrane,
observed
8-anilino-1-naphthalenesulfonic
acid
dye
test.
presence
also
confirmed
using
2,7-dichlorofluorescein
diacetate
(DCFDA)
Small,
Journal Year:
2023,
Volume and Issue:
20(16)
Published: Nov. 30, 2023
Bismuth(III)-based
complexes
have
garnered
increasing
attention
in
fluorescence
sensing
due
to
their
environmentally
friendly
and
sustainable
characteristics.
A
Bismuth(III)
coordination
polymer
(CP),1-Cl
based
on
a
naphthalene
diimides(NDI)-pyridinium
is
synthesized
by
an
situ
reaction
method.
Notable
for
its
sensitivity
visible
light,
1-Cl
shows
excellent
photochromic
properties,
the
integration
of
NDI
pyridinium
one
ligand
makes
photogenerated
radicals
more
stable.
Structural
analysis
theoretical
calculations
are
employed
investigate
potential
pathway
photoinduced
electron
transfer
(ET)
during
process.
Notably,
aqueous
solutions,
displays
extraordinary
enhancement
response
bromide
ion
(Br
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 23, 2024
Abstract
Radicals,
with
their
unpaired
electrons,
exhibit
unique
chemical
and
physical
properties
that
have
long
intrigued
chemists.
Despite
early
skepticism
about
stability,
the
discovery
of
persistent
radicals
has
opened
new
possibilities
for
molecular
interactions.
This
review
examines
mechanisms
applications
radically
driven
self‐assembly,
focusing
on
key
motifs
such
as
naphthalene
diimides,
tetrathiafulvalenes,
viologens,
which
serve
models
radical
assembly.
The
potential
interactions
in
development
artificial
machines
(AMMs)
are
also
discussed.
These
AMMs,
powered
by
radical‐radical
interactions,
represent
significant
advancements
non‐equilibrium
chemistry,
mimicking
functionalities
biological
systems.
From
switches
to
ratchets
pumps,
versatility
AMMs
highlighted.
Additionally,
assembly
materials
science
explored,
particularly
creating
smart
redox‐responsive
properties.
concludes
comparing
machines,
offering
insights
into
future
directions.
overview
underscores
impact
chemistry
its
promising
both
synthetic
Inorganic Chemistry Frontiers,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 6, 2024
This
review
summarizes
recent
advances
in
naphthalene
diimide-based
crystalline
hybrid
photochromic
materials,
including
the
different
structures
types,
mechanism
and
their
applications
this
field.
