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.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 29, 2024
Abstract
Despite
the
remarkable
luminescent
properties
and
temperature
sensing
capabilities
of
lanthanide
materials,
their
photothermal
effect
in
practical
measurement
systems
presents
a
major
challenge
to
reliability.
Herein,
taking
Pr
3+
as
typical
exemplar,
influence
excitation
wavelength
approach
on
is
systematically
examined.
The
pulsed
laser
method
identified
an
efficient
tactic
restrain
self‐heating
luminescence
materials.
In
accordance
with
this
principle,
it
discovered
that
diverse
wavelengths
give
rise
alterations
internal
energy
transport
channels
further
impact
performance.
980
nm
can
result
non‐thermal
coupling
occupying
states
3
P
0
/
1
,
which
are
recognized
thermal
levels
conventional
concept,
yield
relative
sensitivity
(
S
r
)
performance
more
than
three
times
superior
down‐shifting‐based
sensing.
work
provides
comprehensive
analytical
solution
for
achieving
highly
sensitive
stable
based
working
mode
strategies.
Journal of Fluorescence,
Journal Year:
2023,
Volume and Issue:
34(3), P. 1039 - 1048
Published: July 14, 2023
Abstract
Visible
and
near-infrared
(NIR)
upconversion
luminescence
(UCL)
emissions
originating
from
the
BaY
2
F
8
:
Yb
3+
,
Tm
systems
were
investigated
under
a
laser
excitation
at
980
nm.
The
:20
mol%
x
y
0.5
phosphors
showed
prominent
UCL
800
810
optimized
doping
concentrations
of
in
host
matrix
evaluated,
their
spectroscopic
properties
determined,
studies
on
temperature-dependent
behaviour
carried
out.
temperature-sensing
studied
by
generating
fluorescence
intensity
ratio
(FIR)
peaks
thermally-coupled
energy
levels
ions.
Stark
sublevels
1
G
4
level
ions
utilized
to
estimate
abilities
phosphor.
Graphical
Current Analytical Chemistry,
Journal Year:
2023,
Volume and Issue:
19(10), P. 693 - 703
Published: Oct. 19, 2023
Abstract:
This
review
provides
a
comprehensive
examination
of
the
application
fluorescence
materials
for
detection
latent
fingerprints
in
forensic
sciences.
Traditional
methods
like
powder
dusting,
cyanoacrylate
fuming,
chemical
methods,
and
small
particle
reagent
techniques
have
shown
limitations
due
to
issues
low
contrast,
sensitivity,
selectivity,
high
toxicity.
To
overcome
these
drawbacks,
recent
focus
has
shifted
towards
using
fluorescent
materials,
owing
their
unique
optical
properties.
underscores
importance
fingerprint
development
employing
metal
nanoparticles,
semiconductor
organic
compounds.
These
advanced
not
only
provide
heightened
selectivity
compared
traditional
but
also
manifest
diminished
In
essence,
delivers
methodical
survey
pioneering
techniques.
Lanthanum
oxyfluoride
(LaOF)
is
widely
utilized
across
various
fields
due
to
its
exceptional
properties
and
diverse
phase
structures:
cubic
(α-LaOF),
rhombohedral
(γ-LaOF),
tetragonal
(β-LaOF),
each
with
distinct
characteristics.
The
varying
F/O
occupancy
in
these
structures,
influenced
by
oxygen
vacancies
concentration
(η),
necessitates
an
understanding
of
how
η
impacts
LaOF's
transition
process.
This
study
simulated
different
scenarios
manipulating
η,
calculating
the
electron
localization
function
(ELF)
excess
energy
(Eexc)
through
first-principles
density
functional
theory
(DFT).
Results
indicate
that
α-LaOF
predominates
at
lower
(13%
~
14%),
succeeded
β-LaOF
γ-LaOF
higher
(32%
39%).
Oxygen
facilitate
a
favorable
pathway
for
occupancy.
Experimental
verification
involved
calcining
lanthanum
fluorocarbonate
(LaCO3F)
N2,
obtaining
LaOF
structures.
At
600°C,
formed
13.10%,
while
750°C,
emerged
increased
39.01%.
Further
heating
1000°C
induced
γ-LaOF's
decreased
32.60%,
creating
two-phase
coexistence
zone
between
β-LaOF.
1300°C,
decomposed
into
La2O3,
simultaneously
triggering
β-LaOF's
back
γ-LaOF.
sequence
N2
temperatures
follows
→
+
La2O3.Experimental
results
effectively
validate
DFT
predictions,
enhancing
our
intricate
behavior
under
conditions
offering
valuable
insights
applications
fields.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 6, 2024
The
development
of
high-sensitivity
thermometers
has
become
increasingly
important
in
recent
years
as
the
demand
for
noncontact
optical
temperature
measurement
grown.
Herein,
we
report
a
series
Sr
