Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
64(1), P. 192 - 201
Published: Dec. 19, 2024
Trivalent
lanthanide
ions
have
emerged
as
promising
candidates
for
precise
and
remote
temperature
sensing.
Among
them,
Pr3+-based
luminescent
thermometers
remain
underexplored,
particularly
those
operating
in
the
near-infrared
(NIR)
spectral
region.
This
work
presents
synthesis
thorough
characterization
of
a
novel
coordination
polymer,
{[Pr2IIIPt3II(CN)12(4,4′-bpyO2)4(H2O)6]·4H2O}n
(1),
rare
example
Pr3+
thermometry.
Coordination
between
ions,
cyanido-bridged
Pt2+
centers,
4,4′-bpyO2
ligands
enables
efficient
energy
transfer,
producing
luminescence
visible
regions.
The
polymer
demonstrates
distinct
temperature-dependent
over
wide
range
(12–386
K),
with
relative
thermal
sensitivities
≅1%·K–1
minimum
uncertainty
0.2
K.
Abstract
Among
the
various
techniques
used
in
luminescence
thermometry,
kinetics
is
considered
least
sensitive
to
perturbations
related
optical
properties
of
medium
containing
phosphor.
For
this
reason,
temperature
sensing
and
imaging
using
lifetime‐based
thermometers
are
high
interest
for
a
wide
range
specific
applications.
However,
most
such
thermometers,
an
increase
leads
shortening
lifetime,
which
can
hinder
specificity
accuracy
readout.
In
work,
approach
presented
that
utilizes
thermally
induced
symmetry
host
material
associated
with
structural
phase
transition
LiYO
2
:Yb
3+
.
Consequently,
lifetime
excited
level
F
5/2
Yb
ion
prolonged,
achieving
relative
sensitivity
0.5%/K.
The
be
controlled
by
adjusting
dopant
concentration.
Additionally,
thermal
changes
emission
spectrum
enable
use
ratiometric
readout
5.3%/K
at
280K
:5%Yb
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(20), P. 26439 - 26449
Published: May 13, 2024
In
response
to
the
ongoing
quest
for
new,
highly
sensitive
upconverting
luminescent
thermometers,
this
article
introduces,
first
time,
thermometers
based
on
thermally
induced
structured
phase
transitions.
As
demonstrated,
transition
from
low-temperature
monoclinic
high-temperature
tetragonal
structures
of
LiYO2:Yb3+,Er3+
induces
multifaceted
modification
in
spectroscopic
properties
examined
material,
influencing
spectral
positions
luminescence
bands,
energy
gap
values
between
coupled
levels,
and
red-to-green
emission
intensities
ratio.
Moreover,
as
illustrated,
both
color
emitted
light
temperature
(from
265
K,
LiYO2:Er3+,
1%Yb3+,
180
10%Yb3+),
consequently,
thermometric
parameters
thermometer
can
be
modulated
by
concentration
Yb3+
sensitizer
ions.
Establishing
a
correlation
mismatch
ion
radii
host
material
dopant
ions
allows
smooth
adjustment
performance
such
following
specific
application
requirements.
Three
different
approaches
were
investigated
using
levels
(SR
=
1.8%/K
at
K
1%Yb3+),
green
red
ratio
1.5%/K
305
2%Yb3+),
single
band
ratiometric
approach
2.5%/K
240
10%Yb3+).
The
structural
LiYO2:Er3+,Yb3+
has
enabled
development
multiple
thermometers.
This
innovative
opens
avenues
advancing
field
thermometry,
offering
enhanced
relative
thermal
sensitivity
adaptability
various
applications.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(42), P. 57421 - 57427
Published: Oct. 9, 2024
Exploring
methods
to
achieve
high
thermal
stability
in
phosphors
is
of
great
significance
for
their
applications
high-temperature
fields.
Currently,
energy
transfer
(ET)
from
the
host
activator
lanthanide
ions
(Ln3+)
an
effective
approach
improving
antithermal
quenching
phosphors.
In
this
contribution,
LaNbO4
(LNO)
with
efficient
blue
emission
used
as
construct
host–Ln3+
dual-emitting
LNO/Ln3+
(Eu3+/Sm3+/Pr3+)
phosphor
system,
and
ET
efficiency
under
activation
investigated.
Experimental
results
indicate
that
temperature
rises,
LNO
Ln3+
increases,
resulting
completely
opposite
luminescent
responses
between
Ln3+.
That
is,
undergoes
quenching,
while
exhibits
where
integrated
luminescence
intensity
at
498
K
2.50–3.73
times
298
K.
Therefore,
based
on
differing
response
trends
peaks
phosphors,
a
dual-mode
optical
sensing
system
can
be
designed
using
fluorescence
ratio
color
change,
achieving
relative
sensitivity.
Thus,
work
provides
new
insights
into
design
sensing.
Journal of Materials Chemistry B,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
This
review
explores
nanoparticles
in
image-guided
thermal
therapy,
highlighting
their
targeted
treatment
potential,
temperature
feedback,
nanomaterial
architectures,
and
applications
hyperthermia
precision
medicine.
Rare
earth-doped
nanomaterials
can
achieve
diverse
upconversion
luminescence
by
changing
doping
ions,
presenting
them
as
promising
candidates
for
rapid
temperature
measurement.
However,
most
luminescent
phosphors
have
a
thermal
quenching
effect,
which
greatly
weakens
the
luminous
intensity
of
material
and
impairs
thermometry
performances.
Here,
we
studied
synthesis
Bi4Ti3O12
nanosheets
tridoped
with
Er3+,
Yb3+,
Nd3+
ions
using
molten
salt
method.
Notably,
this
demonstrates
both
enhancement
effects.
The
unusual
phenomenon
results
in
high
sensitivity
optical
sensor
based
on
inter-ion
energy
level
between
Er3+
Nd3+.
At
523
K,
reaches
5.83%
K-1,
surpassing
that
sensors
relying
coupling
only
nearly
ninefold.
Our
findings
suggest
strategy
to
augment
sensing
materials,
paving
way
potential
applications
precise
monitoring.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 7, 2024
Abstract
Organic–inorganic
metal
halides
(OIMHs)
possess
low
preparation
costs
and
high
photoluminescence
quantum
yield.
Within
a
specific
range,
the
temperature‐dependent
nature
of
OIMHs'
luminescent
lifetime
facilitates
temperature
sensing
thermal
imaging
functionalities.
In
this
study,
non‐toxic
(C
10
H
22
N)
6
SbBr
9
·H
2
O
([C
N]
+
is
4‐(tert‐buty)cyclohexanamine
cation)
with
0D
structure
crystallized
in
Pbcn
space
group
obtained.
Under
blue
light
excitation
at
room
temperature,
it
demonstrates
intense
broad
emission
centered
635
nm.
Further
investigation
into
correlation
between
has
unveiled
exceptional
precision.
The
relative
sensitivities
within
range
power
system
alert
30–70
°C
lie
2.5%
4.5%
K
−1
.
This
matches
typical
high‐temperature
warning
threshold
for
systems.
Moreover,
after
immersion
water
alcohol,
compound
maintains
remarkable
stability,
multiple
heating/cooling
cycles
confirming
its
reliability
under
test
temperatures.
Additionally,
composite
thin‐film
device
composed
O,
showcasing
potential
as
stable
durable
fabricated.
