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.
ACS Materials Letters,
Journal Year:
2024,
Volume and Issue:
6(4), P. 1327 - 1337
Published: March 7, 2024
Luminescent
nanothermometers
with
high
spatial
and
thermal
resolution
are
desirable
for
a
wide
range
of
temperature-sensing
applications.
Lanthanide-doped
nanoparticles
can
be
excited
by
emit
light
in
the
near-infrared
(NIR)
region,
rendering
them
ideal
candidates
NIR
nanothermometry.
Pr3+
has
demonstrated
sensing
ability
region
but
only
when
UV–visible
light.
Here,
we
propose
series
NIR-I
Pr3+,
Ho3+,
Yb3+-doped
NaGdF4
core/multishell
double-
single-band
ratiometric
nanothermometry
operating
NIR-II
region.
Thermal
was
organic
aqueous
dispersions
as
well
powders.
The
Sr
based
on
1G4
→
3H5
Ho3+
5I6
5I8
radiative
transitions
reached
2.4%
°C–1
at
40
°C,
while
maximal
obtained
using
emission
0.8%
10
°C.
These
findings
demonstrate
promise
Pr3+-doped
NIR-NIR
