Cyano-substituted triphenylamine derivative with mechanochromism and mechanoluminescence
Dyes and Pigments,
Год журнала:
2024,
Номер
223, С. 111960 - 111960
Опубликована: Янв. 21, 2024
Язык: Английский
Crystal Engineering-Driven Sunlight Responsiveness and Flexible Waveguide Transmission
The Journal of Physical Chemistry Letters,
Год журнала:
2024,
Номер
15(28), С. 7335 - 7341
Опубликована: Июль 10, 2024
Here,
a
barbituric
acid
derivative
containing
pyrene
rings
(DPPT)
was
successfully
synthesized,
and
two
types
of
crystals
were
prepared
by
using
crystal
engineering
methods.
Orange
sheet-like
(DPPT-O,
observed
in
visible
light),
DCM/CH3OH
solution,
exhibited
brittleness
weak
fluorescence
emission,
along
with
sunlight-induced
bending
fracturing.
Red
needle-like
(DPPT-R,
also
synthesized
DCM/CH3CN
demonstrated
elastic
properties,
strong
excellent
optical
waveguide
performance
(with
an
loss
coefficient
0.23-0.30
dB
mm-1).
Single-crystal
data
analysis
revealed
that
the
stacking
arrangement
molecules
critically
influenced
elasticity
crystals,
while
reaction
cavity
size
regulated
photomechanical
properties
crystals.
This
study
achieved
effective
control
over
sunlight
responsiveness
flexible
transmission
for
first
time,
providing
innovative
insights
application
homogeneous
organic
polycrystalline
molecular
this
field.
Язык: Английский
Heterostructure of Hydrogen‐Bonded Organic Frameworks for White Light Emission and Information Encryption
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 25, 2024
Abstract
Two
dumbbell‐shaped
building
blocks
(TMB
and
TMBT),
featuring
methyl
benzoate
groups
as
hydrogen
bond
units,
are
selected
to
construct
heterostructures
of
HOFs,
aiming
achieve
multiple
functions
including
white
luminescence,
stimulus‐response
behavior,
well
application
in
information
encryption.
TMB
molecules
self‐assembled
form
a
flexible
HOF
(X‐HOF‐8)
p‐xylene,
containing
solvent
channels
blue
fluorescence.
Upon
removal
guests,
it
can
transform
into
nonporous
crystal
with
gray
In
contrast,
TMBT
forms
guest‐free
(X‐HOF‐9)
displaying
orange
They
could
bulk
heterojunction
(BHJ)
HOFs
energy
transfer
from
TMBT,
exhibiting
composition‐dependent
fluorescent
color.
Notably,
emission
be
achieved
BHJ
converted
fluorescence
upon
guest
removal;
subsequently,
is
restored
re‐capturing
guests.
Furthermore,
rod‐like
triblock
(THJ)
also
constructed,
which
exhibit
regulatory
behavior
response
gaining
or
losing
The
unique
luminescent
characteristics
stimulus
responsiveness
these
make
them
an
excellent
platform
for
applications
anticounterfeit.
This
represents
the
pioneering
achievement
light
HOF,
groundbreaking
realization
THJ
remarkable
exciting
characteristics.
Язык: Английский
Cyano-Substituted Triphenylamine Derivative with Mechanochromism and Mechanoluminescence
Опубликована: Янв. 1, 2023
To
achieve
materials
exhibiting
both
mechanoluminescent
and
mechanochromic
activities,
an
asymmetrical
triphenylamine
derivative,
DCTPAA,
containing
one
aldehyde
group
two
cyano
groups,
was
designed
synthesized.
DCTPAA
displayed
solvatochromism,
with
a
red-shifted
emission
as
the
solvent
polarity
increased,
indicating
donor-acceptor
structure's
inherent
property.
It
emitted
blue
fluorescence
in
its
pristine
crystal
state,
but
exhibited
green
upon
grinding.
The
could
be
restored
after
ground
powder
treated
DCM
vapor,
showcasing
reversible
mechanochromism.
XRD
pattern
suggested
that
process
accompanied
by
phase
change
between
crystalline
amorphous
states.
Notably,
despite
centrosymmetric
space
of
crystal,
material
strong
mechanoluminescence
emission.
intermolecular
packing
analysis
theoretical
calculations
demonstrated
interaction
should
contribute
to
mechanoluminescence.
Язык: Английский