ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 5, 2025
Achieving
precise
control
over
emission
characteristics,
such
as
wavelength
and
lifetime,
is
critical
to
unlocking
the
full
potential
of
luminescent
nanomaterials
for
diverse
applications.
In
this
work,
we
present
a
strategy
fine-tuning
optical
properties
upconversion
nanocrystals
by
engineering
parts-per-million
(ppm)-doping-level
lanthanide
impurities.
We
show
that
even
trace
impurities
(∼10
ppm,
fewer
than
10
atoms
per
nanocrystal),
which
are
only
hundredth
conventionally
studied
doping
levels
were
previously
considered
negligible,
serve
efficient
energy
traps
in
migration-based
processes.
By
introducing
controlled
trapping
centers
via
minimal
impurity
doping,
successfully
regulate
colors
lifetimes
with
high
precision.
Moreover,
find
high-purity
exhibit
significantly
greater
lifetime
changes
response
surface
interactions,
enabling
an
energy-transfer-based
ultrasensitive
spectrum
sensing.
This
approach
facilitates
development
upconversion-based
DNA
sensors
detection
limits
order
magnitude
lower
those
conventional
methods,
highlighting
these
highly
effective
nanoprobes
interference-resistant
biosensing
complex
environments.
International Journal of Mining Science and Technology,
Journal Year:
2023,
Volume and Issue:
33(10), P. 1193 - 1202
Published: Oct. 1, 2023
Rare
earth
element
is
an
important
strategic
metal,
but
the
supply
of
high
purity
rare
ores
growing
slowly,
which
in
sharp
contradiction
with
rapidly
demand.
Froth
flotation
has
been
confirmed
to
be
effective
method
separate
bastnaesite
from
its
gangue
minerls.
However,
traditional
collectors
are
facing
serious
problems
separation
minerals,
requiring
addition
excess
depressant
and
regulator
process.
Herein,
we
proposed
synthesized
novel
Gemini
hydroxamic
acids
Octyl-bishydroxamic
acid
(OTBHA),
Decyl-bishydroxamic
(DCBHA)
Dodecyl-bishydroxamic
(DDBHA)
as
bastnaesite-barite
system.
The
effect
different
carbon
chain
lengths
on
molecular
properties
were
explored
by
density
functional
theory
(DFT)
calculations.
DCBHA
possessed
a
stronger
reactivity
compared
OCBHA
DDBHA.
results
verified
consistency
computational
calculation
about
performance
prediction
acids.
Compared
DDBHA,
displayed
superior
collecting
affinity
toward
bastnaesite,
did
not
float
barite.
Zeta
potential
showed
that
presence
increased
while
it
had
almost
no
barite,
indicating
for
bastnaesite.
Then,
Fourier
transform
infrared
(FTIR)
X-ray
photoelectron
spectroscopy
(XPS)
analyses
indicated
adsorption
mechanism
was
due
two
hydroxamate
groups
co-anchored
surface
forming
five-membered
―(O―O)―Ce
complexes.
In
addition,
atomic
force
microscopy
(AFM)
clearly
observed
uniformly
aggregated
surface,
contact
angle
improved
hydrophobicity
Processes,
Journal Year:
2024,
Volume and Issue:
12(6), P. 1235 - 1235
Published: June 16, 2024
Rare
earth
elements
(REEs)
are
at
the
forefront
of
discussions,
given
their
crucial
role
in
cutting-edge
and
eco-friendly
innovations
that
propel
industrial
revolution
towards
a
green
economy.
These
have
become
indispensable
to
various
modern
technologies,
such
as
smartphones,
electronic
devices,
renewable
energy
sources.
Many
different
concepts
analyses
been
introduced,
chemical
similarities
among
REEs,
health
risks
ecological
damages,
negative
environmental
impacts
current
recovery
processes,
strategies
for
advancing
REE
circular
Although
these
widely
used
applications
over
last
20
years,
literature
on
aspects
is
fragmented
spread
across
research
areas,
shared
by
multiple
branches
application
fields.
fields
include
safety
concerns,
economic
challenges,
technology.
Summarizing
classifying
this
challenging
due
its
nature,
variety
topics,
approaches
used.
The
quest
cleaner
recycling
necessitates
comprehensive
assessment
covering
economic,
technological,
aspects.
primary
goal
review
provide
holistic
perspective
with
central
focus
dimensions,
particularly
emphasizing
reuse,
recycling,
occupational
safety.
begins
addressing
complexities
highlighting
associated
considerations.
It
further
explores
reuse
shedding
light
advantages,
drawbacks,
hazards,
costs
technologies
recovery.
Additionally,
summarizes
exposure
considerations
related
REEs.
Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: May 17, 2024
Abstract
Understanding
lanthanide
coordination
chemistry
can
help
develop
new
ligands
for
more
efficient
separation
of
lanthanides
critical
materials
needs.
The
Cambridge
Structural
Database
(CSD)
contains
tens
thousands
single
crystal
structures
complexes
that
serve
as
a
training
ground
both
fundamental
chemical
insights
and
future
machine
learning
generative
artificial
intelligence
models.
This
work
aims
to
understand
the
currently
available
in
CSD
by
analyzing
shell,
donor
types,
ligand
from
perspective
rare-earth
element
(REE)
separations.
We
obtain
four
sets
CSD:
Subset
1,
all
Ln-containing
(49472
structures);
2,
mononuclear
Ln
(27858
3,
without
cyclopentadienyl
(Cp)
(26156
4,
with
at
least
one
1,10-phenanthroline
(phen)
or
its
derivative
coordinating
(2226
structures).
subsequent
analysis
these
subsets
examines
trends
numbers
first
shell
distances
well
identifies
characterizes
groups.
In
addition,
examples
Ln-complexes
commercially
complexants
phen-based
are
interrogated
detail.
systematic
investigation
lays
groundwork
data-driven
designs
REE
separations
based
on
structural
into
chemistry.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Rare
earth
elements
(REEs)
are
widely
used
in
various
high-tech
industries.
Developing
affinity
ligands
that
can
detect
and
distinguish
REEs
is
at
the
forefront
of
analytical
chemistry.
It
also
interesting
to
understand
limits
natural
biomolecules
for
recognition
REEs.
In
this
study,
Sc
