Room temperature phosphorescence materials based on small organic molecules: Design strategies and applications
Deleted Journal,
Journal Year:
2024,
Volume and Issue:
2(3)
Published: July 23, 2024
Abstract
Room‐temperature
phosphorescence
(RTP)
materials
have
attracted
significant
attention
due
to
their
applications
in
various
fields
such
as
information
storage
and
encryption,
organic
light‐emitting
diode
(OLED),
sensing,
lighting
display,
biological
imaging,
photodynamic
therapy.
Traditionally,
RTP
can
be
efficiently
developed
using
inorganic
systems
with
noble
metals
or
rare
earth
elements.
Recently,
many
efforts
been
devoted
the
development
of
based
on
small
molecules.
The
strategies
construct
include
hydrogen
bonding,
heavy
atom
effect,
n
–π*
transitions,
π–π
stacking,
donor–acceptor
host–guest
doping.
Herein,
we
summarize
recent
examples
molecules
primarily
focusing
design
properties.
Moreover,
promising
OLED,
well
bio‐imaging
phototherapy
are
discussed.
challenges
perspectives
given
provide
inspiration
toward
future
materials.
Language: Английский
Ammonia Detection by Electronic Noses for a Safer Work Environment
Sensors,
Journal Year:
2024,
Volume and Issue:
24(10), P. 3152 - 3152
Published: May 15, 2024
Providing
employees
with
proper
work
conditions
should
be
one
of
the
main
concerns
any
employer.
Even
so,
in
many
cases,
shifts
chronically
expose
workers
to
a
wide
range
potentially
harmful
compounds,
such
as
ammonia.
Ammonia
has
been
present
composition
products
commonly
used
industries,
namely
production
lines,
and
also
laboratories,
schools,
hospitals,
others.
Chronic
exposure
ammonia
can
yield
several
diseases,
irritation
pruritus,
well
inflammation
ocular,
cutaneous,
respiratory
tissues.
In
more
extreme
is
related
dyspnea,
progressive
cyanosis,
pulmonary
edema.
As
such,
use
needs
properly
regulated
monitored
ensure
safer
environments.
The
Occupational
Safety
Health
Administration
European
Agency
for
at
Work
have
already
commissioned
regulations
on
acceptable
limits
Nevertheless,
monitoring
gas
still
not
normalized
because
appropriate
sensors
difficult
find
commercially
available
products.
To
help
promote
promising
methods
developing
sensors,
this
will
compile
compare
results
published
so
far.
Language: Английский
The Role of Locally Excited State and Charge Transfer State in Organic Room Temperature Phosphorescence and Corresponding Applications
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 2, 2024
Abstract
Donor–acceptor
(D–A)
structure
with
charge
transfer
(CT)
effect
is
widely
utilized
in
the
construction
of
organic
luminescent
materials.
The
adjustment
their
CT
and
related
property
usually
relies
on
changes
molecular
different
D
or
A
moieties,
which
will
lead
to
some
uncertainties
structure‐property
relationship.
With
aim
explore
clear
inherent
mechanism
for
D–A
molecule
effect,
it
ideal
that
regulation
intramolecular
one
same
can
be
realized.
Accordingly,
three
type
phosphorescence
luminogens
are
designed
synthesized.
Once
being
doped
into
polymer
matrixes,
disparate
effects
room
temperature
(RTP)
properties
achieved
a
single
molecule.
Subsequent
experiments
confirm
distributions
molecules
locally
excited
(LE)
state
mainly
responsible
distinct
RTP
behaviors,
exhibiting
well‐clarified
relationship
luminogens.
Furthermore,
transition
from
LE
even
realized
through
chemical
reaction,
leading
activated
practical
applications.
Language: Английский
Ultrafast excited-state dynamics and “three-in-one” phototheranostic properties of a phenanthroline-carbolong photosensitizer
Haixia Chang,
No information about this author
Feng Jiang,
No information about this author
X. H. Liu
No information about this author
et al.
Chemical Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
The
favorable
excited-state
dynamics,
nonlinear
optics,
and
extraordinary
phototheranostic
capabilities
of
conjugated
metallaaromatics
are
attractive
topics
research.
A
promising
multifunctional
photosensitizer,
double-phenanthroline-carbolong
DPC,
was
investigated
comparatively.
It
featured
strong
two-photon
absorption
(2PA)
properties
within
the
near-infrared
(NIR)
range,
with
a
maximum
2PA
cross-section
∼7417
GM
at
770
nm
in
MeOH.
Time-dependent
density
functional
theory
ultrafast
dynamics
illustrated
that
fast
charge
transfer
coupled
intersystem
crossing
to
stable
triplet
state
outcompeted
radiative
decays.
"three-in-one"
phototherapeutic
effect
included
NIR-wavelength
excitation,
photodynamic
therapy,
photothermal
therapy
as
subsequently.
significant
contribution
from
intrinsic
intramolecular
communication
along
DPC
skeleton
provided
possibility
for
moderate
conversion
(η
=
36.8%)
synergistic
(Φ
Δ
8.4%).
Interestingly,
singlet
oxygen
generation
also
observed
when
irradiated
excitation
wavelengths.
In
vitro
experiments
demonstrated
phototoxicity
4T1
cancer
cells.
This
work
offers
insights
into
carbolong
highlights
their
potential
applications
fields
optics
phototheranostics.
Language: Английский
Improved Solvatochromism and Quantum Yields in Acridine through Polarity-Enhanced π-Conjugation
The Journal of Physical Chemistry Letters,
Journal Year:
2025,
Volume and Issue:
unknown, P. 4853 - 4860
Published: May 8, 2025
Fluorophores
exhibiting
strong
solvatochromism
are
strongly
desired
for
applications
in
cellular
imaging,
photodevices,
and
fluorescence
sensing.
However,
achieving
high
quantum
yields
increasingly
polar
environments
remains
a
significant
challenge
due
to
the
complex
balance
required
between
transition
dipole
moment
low
emission
energy.
In
this
study,
we
present
an
acridine
derivative
of
pyrene,
Ad-Py,
which
features
donor-π-acceptor
(D-π-A)
scaffold.
Notably,
fluorophore
demonstrated
solvatochromic
property,
red-shift
113
nm,
along
with
(Φf
=
83.5-90.6%)
from
less
solvent
n-hexane
highly
dimethyl
sulfoxide
(DMSO).
The
incorporation
pyrene
moiety
effectively
extended
π-conjugation
Ad-Py
solvents
finely
tuned
proportion
charge
transfer
(CT)
state,
leading
enhanced
yields.
Moreover,
its
sensitivity
microenvironmental
changes,
facilitated
visual
measurement
SO2,
detection
limit
<10
ppb.
Language: Английский
Carrier dynamics competition in the nanocrystal-molecule complex for triplet generation studied by transient-absorption spectroscopy
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy,
Journal Year:
2024,
Volume and Issue:
320, P. 124658 - 124658
Published: June 13, 2024
Language: Английский
Naphthalimide-Modified Clusters for Red-Emitting Devices with High Color Purity
Hui Xiao,
No information about this author
Jin-Yun Wang,
No information about this author
Liyi Zhang
No information about this author
et al.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(37), P. 17157 - 17165
Published: Sept. 5, 2024
Conventional
fluorescent
materials
frequently
exhibit
narrow-band
emissions
with
a
small
full
width
at
half-maximum
(fwhm)
due
to
localized-state
characteristics,
but
electroluminescence
is
less
efficient
owing
the
utilization
of
only
singlet
excitons.
In
this
work,
taking
advantage
naphthalimide
(NAI)-acetylide
derivatives
rigid
planar
structure
and
localized
transition
we
elaborately
designed
two
mononuclear
Pt(II)
complexes
weak
double
fluorescence
phosphorescence.
Taking
them
as
synthetic
precursors,
prepared
three
PtAu
Language: Английский