ACS Omega,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 26, 2024
A
straightforward
method
for
synthesizing
a
stable,
photoreactive,
and
fluorescent-probe
azo
dye
molecule
is
presented,
highlighting
the
influence
of
pyrylium
groups
within
electronic
structure
novel
dye.
This
compound,
named
pyrylazo
molecule,
synthesized
through
chemical
reaction
between
2,4,6-trimethylpyrylium
4-methoxybenzenediazonium
species.
The
methyl
group
at
para
position
readily
reacts
with
diazonium
forming
stable
protonated
pyrylium-azo
(N-protonated
pyrylazo).
can
easily
change
into
its
N-deprotonated
form
upon
introduction
weak
base,
such
as
an
amine,
promoting
significant
spectral
shifts
in
visible
absorption
fluorescence
bands.
Because
that
other
photochemical
properties,
this
has
shown
potential
applications
photoinduced
processes
biological
contexts,
particularly
Coulombic
interactions
micelles
animal
cells.
In
contrast
to
nonfluorescent
dyes,
singlet
excited
state
deactivated
radiative
process
organized
media,
evidenced
by
behavior
during
micelle
cell
membrane
permeation,
emission
cytoplasm.
Nanosecond-transient
spectroscopy
reveals
reversible
proton
release
occurring
state,
suggesting
states
may
play
roles
transport
ion
channels,
artificial
photosynthesis,
protein
folding.
These
promising
underscore
remarkable
photophysical
properties
not
observed
molecules
reported
before.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 8, 2025
Abstract
The
excellent
optical
memory
effect
of
electrochromic
materials
plays
a
significant
role
in
the
construction
bistable
device
that
has
great
potential
application
prospects
field
energy‐saving.
Extensive
efforts
have
been
devoted
to
improving
devices
by
conducting
engineering,
whereas
fewer
focus
on
molecular
engineering
at
level.
Herein,
scalable
method
is
developed
prepare
new
metallo‐supramolecular
polymer
(MSP)
with
conjugation
spacer
among
polymeric
skeleton,
which
switches
from
deep
purple
transmissive
performance,
such
as
fast
switching
speed
(1.3
and
3.8
s
for
coloring
bleaching
process,
respectively),
high
coloration
efficiency
(1052.5
cm
2
C
−1
576
nm)
long‐term
cycling
stability
(decreases
14.1%
after
1000
cycles).
Moreover,
due
introduction
PolyFe‐PF
6
film
enhanced
considerably,
only
attenuates
12%
cutting
off
external
3600
s.
As
demonstration
its
application,
an
fabricated.
These
results
illustrate
into
skeleton
effective
strategy
MSPs.
Journal of the American Chemical Society,
Journal Year:
2023,
Volume and Issue:
145(33), P. 18391 - 18401
Published: Aug. 11, 2023
Energy
transfer
and
exciplex
emission
are
not
only
crucial
photophysical
processes
in
many
living
organisms
but
also
important
for
the
development
of
smart
photonic
materials.
We
report,
herein,
rationally
designed
synthesis
characterization
two
highly
charged
bischromophoric
homo[2]catenanes
one
cyclophane
incorporating
a
combination
polycyclic
aromatic
hydrocarbons,
i.e.,
anthracene,
pyrene,
perylene,
which
intrinsically
capable
supporting
energy
formation.
The
possible
coconformations
homo[2]catenanes,
on
account
their
dynamic
behavior,
have
been
probed
by
Density
Functional
Theory
calculations.
unique
properties
these
exotic
molecules
explored
steady-state
time-resolved
absorption
fluorescence
spectroscopies.
tetracationic
pyrene-perylene
system
exhibits
emanating
from
efficient
Förster
resonance
(FRET)
mechanism
occurs
48
ps,
while
octacationic
homo[2]catenane
displays
weak
photoluminescence
following
extremely
fast
(<0.3
ps)
in-depth
fundamental
understanding
involved
cyclophanes
paves
way
use
future
bioapplications
devices.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(26)
Published: May 8, 2024
Abstract
A
series
of
sulfur‐bridged
2,2′‐viologens,
2,2′‐thienoviologens
(2,2′‐SV
2+
)
with
propyl
bridge
and
hydroxyl
bridges,
are
synthesized
for
the
first
time.
The
exhibited
improved
visible‐light
absorption,
narrow
energy
gap,
more
negative
reduction
potential
(160
mV
lower
than
4,4′‐thienoviologens)
stable
free
radical
states
compared
4,4′‐thienoviologens
parent
2,2′‐viologens.
utilization
femtosecond
transient
absorption
(fs‐TA)
demonstrated
that
2,2′‐thienoviologen
can
produce
distinct
charge‐separated
under
visible
light
excitation.
Due
to
their
excellent
photophysical
electrochemical
properties,
used
electrochromic
devices
combined
g‐C
3
N
4
via
hydrogen
bonds
catalytic
production.
Based
on
advantageous
electron‐donating
properties
2,2′‐SV
,
release
efficiency
2,2′‐thienoviologens‐modified
composites
is
8542
µmol·h
−1
·g
a
value
highest
reported
production
from
organic
small‐molecule‐modified
78
times
higher
unmodified
.
This
study
presents
concise
method
convert
solar
broaden
applications
2,2′‐viologens
in
photocatalytic
systems.
Advanced Optical Materials,
Journal Year:
2023,
Volume and Issue:
12(10)
Published: Dec. 21, 2023
Abstract
Electrically
triggered
color‐changing
materials,
termed
as
electrochromic
offer
precise
and
programmable
color
transistions
through
the
manipulation
of
electric
field
frequency
amplitude.
They
are
used
displays,
sensors,
military
camouflage,
wearable
devices,
anticounterfeiting
materials.
Their
future
advancements
depend
on
clear
understanding
change
mechanisms
pros/cons
between
different
To
this
end,
we
starts
by
categorizing
electrochromism
into
two
classes
according
to
production
mechanism:
chemical
color‐based
physical
color‐based.
Within
former,
emerges
from
molecules
selectively
absorbing
specific
wavelengths
light
changes
stem
electrochemical
redox
reactions.
The
latter,
meanwhile,
hinges
upon
electrically
induced
alterations
in
geometries,
dimensions,
or
arrangements
nano/micro
structures,
such
photonic
crystals
plasmonic
nanostructures.
principles
both
categories
detailed,
compare
their
differences
terms
response
time,
operating
voltage,
degree
change,
stability.
At
applications
will
be
discussed
spanning
smart
windows
display,
dynamic
energy
storage,
thermal
management.
This
critical
review
is
aimed
provide
multidisciplinary
insights
that
benefit
novices
seasoned
experts
engaged
fundamental
exploration
practical
investigations
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(30)
Published: May 9, 2024
Abstract
Based
on
the
electron‐withdrawing
effect
of
Pt(bpy)Cl
2
molecule,
a
simple
post‐modification
amide
reaction
was
firstly
used
to
graft
it
onto
surface
NH
‐MIL‐125,
which
performed
as
highly
efficient
electron
acceptor
that
induced
conversion
photoinduced
charge
migration
pathway
from
internal
BDC→TiO
x
external
BDC→PtN
migration,
significantly
improving
efficiency
transfer
and
separation.
Furthermore,
precisely
regulating
over
first
coordination
sphere
Pt
single
atoms
achieved
using
further
with
additional
bipyridine
investigate
Pt−N
numbers
activity.
The
as‐synthesized
NML‐PtN
exhibited
superior
photocatalytic
hydrogen
evolution
activity
7.608
mmol
g
−1
h
,
remarkable
improvement
225
2.26
times
compared
pristine
‐MIL‐125
4
respectively.
In
addition,
apparent
quantum
yield
4.01
%
(390
nm)
turnover
frequency
190.3
(0.78
wt
SA;
129
nanoparticles/NML)
revealed
high
solar
utilization
material.
And
macroscopic
color
changes
caused
by
transition
carrier
paths
observed.
It
holds
profound
significance
for
design
MOF‐Molecule
catalysts
separation
precise
regulation
single‐atom
sphere.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
Recent
advances
and
outlook
of
porous
organic
cage-based
materials
(pristine
POCs,
POC
composites
derivatives)
in
the
field
energy
applications,
including
photocatalysis,
electrocatalysis,
separation,
batteries
proton
conductivity.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 19, 2025
Using
electrochemically
responsive
metal-organic
frameworks
(MOFs)
as
host
matrices
to
afford
gating
properties
for
functional
guests
is
rather
attractive
but
remains
unexplored.
Herein,
a
series
of
functionalized
Zr-MOFs
with
viologen-like
skeletons
were
created
by
engineering
2,2'-bipyridinium
bay
substitution
different
alkyl
chains.
Of
the
series,
benefiting
from
enhanced
rigidity,
one
bearing
N,N'-ethylene
bridge,
UiO-67-EE,
exhibited
strongest
electron
deficiency
due
lowest
LUMO
level,
thereby
leading
efficient
transfer
and
favorable
redox
activity,
which
further
endowed
it
outstanding
electrochromic
properties.
More
importantly,
highly
electron-deficient
framework
UiO-67-EE
could
allow
accommodation
electron-rich
guest
molecules
through
host-guest
charge
(CT)
interactions.
By
leveraging
electroresponsiveness
functionality,
served
an
adaptable
platform
controlled
release
capture
control
dynamic
CT
interactions
upon
stimuli
alternate
potentials.
This
smart
electrochemical
behavior
systems
was
also
monitored
in
real
time
distinguishable
optical
changes
guests.
Besides,
exploited
develop
high-performance
sensing
platforms
integrating
molecular
gate
constructed
target-aptamer
complex.
