Nanomaterials,
Journal Year:
2023,
Volume and Issue:
13(21), P. 2904 - 2904
Published: Nov. 5, 2023
Luminescence
thermometry
has
emerged
as
a
very
versatile
optical
technique
for
remote
temperature
measurements,
exhibiting
wide
range
of
applicability
spanning
from
cryogenic
temperatures
to
2000
K.
This
technology
found
extensive
utilization
across
many
disciplines.
In
the
last
thirty
years,
there
been
significant
growth
in
field
luminous
thermometry.
accompanied
by
development
read-out
procedures,
creation
luminescent
materials
sensitive
probes,
and
advancements
theoretical
understanding.
review
article
primarily
centers
on
nanoparticles
employed
luminescence
this
paper,
we
provide
comprehensive
survey
recent
literature
pertaining
lanthanide
transition
metal
nanophosphors,
semiconductor
quantum
dots,
polymer
nanoparticles,
carbon
nanodiamonds
addition,
engage
discussion
regarding
benefits
limitations
comparison
with
conventional,
microsized
probes
their
application
Accounts of Materials Research,
Journal Year:
2023,
Volume and Issue:
4(10), P. 879 - 891
Published: Aug. 29, 2023
ConspectusThermally
activated
delayed
fluorescence
(TADF)
materials
are
widely
used
in
organic
light-emitting
diodes,
but
their
long
emission
lifetimes
also
make
them
ideal
for
use
bioimaging
probes,
fluorescent
sensors,
and
phototheranostics.
Unfortunately,
development
toward
these
applications
has
been
restricted
by
the
poor
compatibility
of
most
TADF
with
aqueous
conditions.
This
problem
can
be
addressed
encapsulating
dyes
into
nanoparticles
that
form
stable
suspensions,
while
preserving─or
even
enhancing─the
photophysical
properties
emitters
they
contain.
Free
heavy
metals,
exhibit
reduced
cytotoxicity,
improved
oxygen
tolerance,
higher
brightness
compared
to
unencapsulated
emitters.This
Account
discusses
recent
advances
application
TADF-active
polymer
as
biocompatible
imaging
probes
stimuli-responsive
materials.
We
demonstrate
encapsulation
semiconducting
dots
(Pdots),
aggregated
(a-Odots)
glassy
(g-Odots)
results
tunable
sizes,
surface
chemistries,
optoelectronic
properties.
These
nanomaterials
particularly
well-suited
applications,
customizable
bioconjugate
chemistry
profiles
ranging
from
deep-blue
near-infrared.
As
generate
long-lived
emission,
time-resolved
obtain
images
high
signal-to-noise
ratios
against
background
biological
autofluorescence.
Materials
multiphoton
absorbance
capable
near-infrared
excitation
presented.
further
discuss
strategies
chemically
modifying
nanoparticles'
coronas
using
biomolecules
cell-penetrating
motifs
target
structures
both
internal
external
cell.
With
strategies,
high-contrast
human
breast,
liver,
kidney
cancer
cells
achieved.
The
ability
specific
tissues,
such
cells,
spurred
phototheranostics,
which
harness
produce
cytotoxic
singlet
upon
irradiation
light.Lastly,
changes
response
oxygen,
temperature,
solvent
conditions,
we
how
integration
highly
effective
environmental
stimuli.
sensors
have
potential
vitro
nanosensors
vivo
molecular
reporters
disease
detection.
an
alternative
type
sensor,
employed
electrochemiluminescence
assays
biomarker
To
explore
stimulus–polymer
interactions
on
a
fundamental
level,
incorporation
bottlebrush
polymers
is
discussed.
Overall,
this
demonstrates
containing
great
spur
new
technologies
imaging,
sensing,
bioanalysis.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(19), P. 12168 - 12186
Published: April 30, 2024
Assessment
of
hypoxia,
nutrients,
metabolite
gradients,
and
other
hallmarks
the
tumor
microenvironment
within
3D
multicellular
spheroid
organoid
models
represents
a
challenging
analytical
task.
Here,
we
report
red/near-infrared
(NIR)
emitting
cell
staining
with
O2-sensitive
nanoparticles,
which
enable
measurements
oxygenation
on
conventional
fluorescence
microscope.
Nanosensor
probes,
termed
"MMIR"
(multimodal
infrared),
incorporate
an
NIR
metalloporphyrin
(PtTPTBPF)
deep
red
aza-BODIPY
reference
dyes
biocompatible
polymer
shell,
allowing
for
oxygen
gradient
quantification
via
ratio
phosphorescence
lifetime
readouts.
We
optimized
techniques
evaluated
nanosensor
probe
characteristics
cytotoxicity.
Subsequently,
applied
nanosensors
to
live
based
HCT116,
DPSCs,
SKOV3
cells,
at
rest,
treated
drugs
affecting
respiration.
found
that
growth
medium
viscosity,
size,
formation
method
influenced
oxygenation.
Some
spheroids
produced
from
HCT116
dental
pulp
stem
cells
exhibited
"inverted"
higher
core
levels
than
periphery.
This
contrasted
frequently
encountered
"normal"
hypoxia
toward
caused
by
diffusion.
Further
microscopy
analysis
demonstrated
metabolic
stratification
spheroids:
thus,
autofluorescence
FLIM
NAD(P)H
indicated
glycolytic
localization
OxPhos-active
Collectively,
demonstrate
strong
potential
NIR-emitting
ratiometric
advanced
studies
targeting
quantitative
real-time
monitoring
metabolism
in
complex
tissue
models.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 10, 2024
Materials
exhibiting
thermally
activated
delayed
fluorescence
(TADF)
based
on
transition
metal
complexes
are
currently
gathering
significant
attention
due
to
their
technological
potential.
Their
application
extends
beyond
optoelectronics,
in
particular
organic
light-emitting
diodes
(OLEDs)
and
electrochemical
cells
(LECs),
include
also
photocatalysis,
sensing,
X-ray
scintillators.
From
the
perspective
of
sustainability,
earth-abundant
centers
preferred
rarer
second-
third-transition
series
elements,
thus
determining
a
reduction
costs
toxicity
but
without
compromising
overall
performances.
This
review
offers
an
overview
TADF
as
photoconversion
materials.
Particular
is
devoted
types
ligands
employed,
helping
design
novel
systems
with
enhanced
properties.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(17)
Published: March 5, 2024
By
combining
bioimaging
and
photodynamic
therapy
(PDT),
it
is
possible
to
treat
cancer
through
a
theranostic
approach
with
targeted
action
for
minimum
invasiveness
side
effects.
Thermally
activated
delayed
fluorescence
(TADF)
probes
have
gained
recent
interest
in
theranostics
due
their
ability
generate
singlet
oxygen
(
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(33), P. 43933 - 43941
Published: Aug. 13, 2024
Fluorescent
nanothermometers
based
on
thermal-dependent
lifetime
have
a
significant
advantage
in
biological
imaging
owing
to
their
immunity
toward
scattering,
absorption,
and
autofluorescence.
In
this
study,
we
present
the
first
example
of
water-soluble
europium
complex
(
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(9), P. 11930 - 11943
Published: Feb. 23, 2024
Optical
temperature
sensors
based
on
self-referenced
readout
schemes
such
as
the
emission
ratio
and
decay
time
are
crucial
for
a
wide
range
of
applications,
with
former
often
preferred
due
to
simplicity
instrumentation.
This
work
describes
new
group
dually
emitting
dyes,
platinum(II)
pincer
complexes,
that
can
be
used
directly
ratiometric
sensing
without
an
additional
reference
material.
They
consist
Pt(II)
metal
center
surrounded
by
pyridinedipyrrolide
ligand
(PDP)
terminal
(benzonitrile,
pyridine,
1-butylimidazol
or
carbon
monoxide).
Upon
excitation
blue
light,
these
complexes
exhibit
green
orange
emission,
quantum
yields
in
anoxic
toluene
at
25
°C
ranging
from
13%
86%
times
spanning
8.5
97
μs.
The
is
attributed
simultaneous
thermally
activated
delayed
fluorescence
(TADF)
phosphorescence
processes
basis
photophysical
investigations
DFT
calculations.
Rather
uniquely,
simple
manipulations
substituents
PDP
alteration
allow
fine-tuning
between
TADF
almost
100%
(Pt(MesPDPC6F5(BN))
over
80%
(Pt(PhPDPPh(BuIm)).
Apart
capabilities,
also
useful
time-based
indicators
coefficients
exceeding
1.5%
K–1
most
cases.
Immobilization
dyes
into
oxygen-impermeable
polyacrylonitrile
produces
materials
read
out
ordinary
RGB
camera
smartphone.
In
addition,
Pt(PhPDPPh)Py
incorporated
biocompatible
RL100
nanoparticles
suitable
cellular
nanothermometry,
we
demonstrate
measurements
multicellular
colon
cancer
spheroids.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 27, 2025
Abstract
Microspheres
dispersed
in
composites
exhibit
excellent
infrared
emissivity
for
radiative
cooling
applications,
which
reflect
sunlight
and
passively
dissipate
heat
into
space
without
electricity.
In
this
study,
hierarchical
microspheres
(HMs)
with
a
two‐tier
structure,
composed
of
SiO
2
,
TiO
‐coated
BaSO
4
or
PNIPAM,
are
incorporated
PDMS‐based
composites.
These
feature
larger
spheres
assembled
from
submicrometer‐scale
nanoparticles
fabricated
via
microfluidics
to
enhance
performance.
HMs
not
only
boost
visible
light
reflection
structural
color
through
photonic
stop
band
but
also
achieve
an
average
97.55%
the
atmospheric
window.
Both
experimental
simulated
results
show
that
performance
composite
material
compared
solid
same
diameter.
Additionally,
applying
coating
further
increases
overall
98.05%.
Incorporating
increased
reflectivity
96.56%,
while
maintaining
superior
at
97.58%.
The
inclusion
PNIPAM
enabled
temperature‐responsive
transmissivity,
materials
containing
preserving
high
HM
structures
solar
thermal
emission,
making
them
effective
cooling.
Sensors and Actuators B Chemical,
Journal Year:
2023,
Volume and Issue:
393, P. 134236 - 134236
Published: June 30, 2023
Temperature
is
an
essential
parameter
for
reliable
assessment
of
oxygen
concentration
by
optical
sensors.
This
can
be
done
a
conventional
sensor
such
as
resistance
thermometer
or
adding
temperature
probe
to
the
sensing
material.
A
that
relies
on
single
emitter
capable
simultaneous
and
would
highly
advantageous.
Unfortunately,
materials
are
extremely
rare
moreover
poorly
suitable
measurement
at
ambient
temperatures
physiological
conditions.
To
cover
this
gap,
we
systematically
investigated
15
Pd(II)
6
Pt(II)
complexes
π-extended
porphyrins
simultaneously
emit
thermally
activated
delayed
fluorescence
(TADF)
phosphorescence.
The
class
quinone-extended
benzoporphyrins
was
found
feature
especially
high
ratios
TADF
phosphorescence
(1.4-2.7
0.10-0.21,
complexes,
respectively,
25
°C)
which
represents
approximately
sixteen-fold
improvement
compared
benchmark
octasulfone-substituted
porphyrins.
Interconversion
into
with
increasing
enables
ratiometric
in
range
from
0
about
65
°C
whereas
accessed
through
decay
time
either
Simultaneous
both
demonstrated
naphthoquinone-extended
benzoporphyrin
embedded
polystyrene
shows
dual
emission
maxima
677
789
nm.
characterized
5
55
partial
pressure
202
hPa,
corresponding
conditions
majority
applications.
As
application
example
compensated
imaging
distribution
demonstrated.
