Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
64(1)
Опубликована: Сен. 3, 2024
Antiferroelectric
(AFE)
has
emerged
as
a
promising
branch
of
electroactive
materials,
due
to
intriguing
physical
attributes
stemming
from
the
electric
field-induced
antipolar-to-polar
phase
transformation.
However,
requirement
extremely
high
field
strength
switch
adjacent
sublattice
polarization
poses
great
challenges
for
exploiting
new
molecular
AFE
system.
Although
photoirradiation
is
striking
noncontact
and
nondestructive
manipulation
tool
optimize
properties,
optical
control
antiferroelectricity
still
remains
unexplored.
Here,
by
adopting
light-sensitive
I
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(29)
Опубликована: Май 15, 2024
Abstract
Lead
halide
molecular
ferroelectrics
represent
an
important
class
of
luminescent
ferroelectrics,
distinguished
by
their
high
chemical
and
structural
tunability,
excellent
processability
distinctive
characteristics.
However,
inherent
instability,
prone
to
decomposition
upon
exposure
moisture
light,
hinders
broader
ferroelectric
applications.
Herein,
for
the
first
time,
we
present
a
series
isoreticular
metal–organic
framework
(MOF)‐type
lead
demonstrating
exceptional
robustness
under
ambient
conditions
at
least
15
months
even
when
subjected
aqueous
boiling
conditions.
Unlike
conventional
metal‐oxo
secondary
building
units
(SBUs)
in
MOFs
adopting
highly
centrosymmetric
structure
with
limited
distortion,
our
halide‐based
occupy
structurally
deformable
[Pb
2
X]
+
(X=Cl
−
/Br
/I
)
SBUs
that
facilitate
c
‐axis‐biased
displacement
Pb
2+
centers
substantially
contribute
thermoinducible
transformation.
Importantly,
this
MOF‐type
undergo
ferroelectric‐to‐paraelectric
phase
transitions
remarkably
Curie
temperature
up
505
K,
superior
most
ferroelectrics.
Moreover,
covalent
bonding
between
phosphorescent
organic
component
light‐harvesting
inorganic
achieves
efficient
spin‐orbit
coupling
intersystem
crossing,
resulting
long‐lived
afterglow
emission.
The
compelling
combination
stability,
ferroelectricity
emission
exhibited
opens
many
potential
opportunities
energy‐conversion
Chemical Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
Hybrid
organic-inorganic
perovskite
(HOIP)
ferroelectrics
exhibit
polarization
reversibility
and
have
a
wide
range
of
applications
in
the
fields
smart
switches,
memorizers,
sensors,
Angewandte Chemie,
Год журнала:
2024,
Номер
136(29)
Опубликована: Май 15, 2024
Abstract
Lead
halide
molecular
ferroelectrics
represent
an
important
class
of
luminescent
ferroelectrics,
distinguished
by
their
high
chemical
and
structural
tunability,
excellent
processability
distinctive
characteristics.
However,
inherent
instability,
prone
to
decomposition
upon
exposure
moisture
light,
hinders
broader
ferroelectric
applications.
Herein,
for
the
first
time,
we
present
a
series
isoreticular
metal–organic
framework
(MOF)‐type
lead
demonstrating
exceptional
robustness
under
ambient
conditions
at
least
15
months
even
when
subjected
aqueous
boiling
conditions.
Unlike
conventional
metal‐oxo
secondary
building
units
(SBUs)
in
MOFs
adopting
highly
centrosymmetric
structure
with
limited
distortion,
our
halide‐based
occupy
structurally
deformable
[Pb
2
X]
+
(X=Cl
−
/Br
/I
)
SBUs
that
facilitate
c
‐axis‐biased
displacement
Pb
2+
centers
substantially
contribute
thermoinducible
transformation.
Importantly,
this
MOF‐type
undergo
ferroelectric‐to‐paraelectric
phase
transitions
remarkably
Curie
temperature
up
505
K,
superior
most
ferroelectrics.
Moreover,
covalent
bonding
between
phosphorescent
organic
component
light‐harvesting
inorganic
achieves
efficient
spin‐orbit
coupling
intersystem
crossing,
resulting
long‐lived
afterglow
emission.
The
compelling
combination
stability,
ferroelectricity
emission
exhibited
opens
many
potential
opportunities
energy‐conversion
Journal of Materials Chemistry C,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
A
one-dimensional
organic
–
inorganic
hybrid
ferroelectric,
(C
4
H
8
NH
2
)
[BiCl
5
],
exhibiting
a
dielectric-optical
duple
switch
is
reported.
Theoretical
study
discloses
that
the
ferroelectricity
originates
from
both
cations
and
anions.
Crystal Growth & Design,
Год журнала:
2025,
Номер
25(5), С. 1597 - 1604
Опубликована: Фев. 24, 2025
Organic–inorganic
metal
halides
(OIMHs)
have
attracted
great
interest
in
the
design
of
various
functional
materials
due
to
their
advantages
easy
processability,
rich
structural
diversity,
and
assembly
flexibility.
However,
rational
control
stacking
patterns
OIMHs
for
regulation
has
been
a
long-standing
challenge.
Particularly,
little
is
known
about
intrinsic
relationship
between
dimensions
dielectric
response
at
molecular
scale.
Here,
we
investigated
modulation
effect
cationic
halogen
engineering
(N,N-dimethylethanolamine)PbBr3
on
stacking,
as
well
its
impact
thermal,
electrical,
optical
physical
properties.
Halogen
brings
varied
from
one-dimensional
(1D)
hexagonal
perovskite
structure
two-dimensional
(2D)
layered
an
interlocking
1D
chain
structure.
These
attributes
demonstrated
be
closely
related
interactions
crystal
lattice,
leading
variation
sequential
increase
phase
transition
temperature
differences
response,
with
similar
bandgaps
that
are
mainly
determined
by
inorganic
frameworks.
This
study
offers
new
insights
into
performance
optimization
organic–inorganic
hybrids.
Inorganic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 17, 2025
Low-dimensional
hybrid
organic–inorganic
ferroelectric
materials
have
attracted
significant
interest
due
to
their
outstanding
optical
and
electrical
properties.
Nevertheless,
many
of
the
most
extensively
studied
hybrids
incorporate
lead
or
tin,
which
raises
concerns
related
long-term
stability
environmental
sustainability.
Here,
by
using
quasi-spherical
strategy,
we
designed
obtained
a
series
zero-dimensional
indium
metal
compounds:
[Me2CH2X(i-Pr)N][InBr4]
(X
=
H,
1;
F,
2;
Cl,
3;
Br,
4,
respectively),
based
on
halogen-substituted
quaternary
amines.
The
differential
scanning
calorimetry
(DSC),
dielectric,
second
harmonic
generation
(SHG)
measurement
results
show
that
these
four
compounds
high-temperature
phase
transitions
(above
room
temperature).
properties
were
confirmed
through
piezoresponse
force
microscopy
(PFM)
electric
hysteresis
loop
(P-E)
measurements.
This
research
offers
new
ideas
for
advancement
innovation
future
smart
optoelectronic
devices.
Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 25, 2025
Abstract
Organic–inorganic
hybrid
perovskites
(OIHPs)
show
great
potential
for
long
afterglow
luminescence
owing
to
their
adjustable
structures
and
exceptional
optoelectronic
properties.
However,
achieving
stable,
ultra‐long
emission
remains
a
challenge,
primarily
because
of
the
limitations
triplet
exciton
phosphorescence.
This
paper
presents
novel
Mn
2+
‐doped
NH
4
CdCl
3
perovskite
single
crystal
with
red
emission.
By
introducing
defect
states
through
doping,
is
realized
independently
Under
254
nm
excitation,
exhibits
lasting
up
2400
s,
controllable
trap
depth
concentration
by
adjusting
doping
levels,
thus
tuning
duration.
Additionally,
crystals
demonstrate
excellent
photoluminescence
(PL)
under
high‐temperature
humid
conditions.
Information
encryption
patterns
are
also
developed
based
on
materials
varying
concentrations,
demonstrating
anti‐counterfeiting
applications.
study
provides
new
strategy
in
organic–inorganic
perovskites.
ACS Materials Letters,
Год журнала:
2024,
Номер
6(9), С. 3941 - 3950
Опубликована: Июль 26, 2024
It
is
still
unclear
how
weak
interactions
specifically
affect
electronic
structures.
Here,
we
systematically
reduce
the
number
of
N–H
bonds
within
diarylmethane
(DAM),
precisely
diminishing
hydrogen
(H-bonds).
Contrary
to
widely
reported
result
that
H-bonds
could
enhance
molecular
brightness
by
promoting
electron
delocalization,
DAMs
lacking
exhibit
superior
luminescence,
compared
with
in
both
dilute
solutions
and
solid
states.
indicated
tend
induce
n-electron
localization,
preventing
formation
through-space
lone-pair
conjugation
(n–n
TSC).
In
addition,
unlike
studied
π–π
only
existed
aggregate
state,
n–n
TSC
can
even
stabilize
conformation
expressed
solutions.
Herein,
not
achieve
bright
white-light
emissions
nonconjugated
small
molecules
but
also
reveal
surprisingly
competitive
relationship
between
providing
a
new
strategy
for
designing
excellent
optoelectronic
materials
via
bridge.
Inorganic Chemistry Frontiers,
Год журнала:
2024,
Номер
11(19), С. 6418 - 6424
Опубликована: Янв. 1, 2024
Starting
from
the
pivotal
structure–performance
relationship,
three
compounds
are
synthesized
through
halogen
regulation,
and
photoluminescence
is
dependent
on
structure.
