Using
ligands
5-(3,5-dicarboxybenzyl)-1H-pyrazole-3,5-dicarboxylic
acid
(H4L)
and
1,2,4,5-tetrakis(4-pyridyl)benzene
(CAS)
with
Zn(II)
or
Cd(II)
ions,
two
coordination
polymers,
namely
{[Zn2(L)(CAS)]·H2O}n
(1)
{[Cd2(L)(CAS)]·(H2O)·(DMF)}n
(2)
was
synthesized
by
solvothermal
method
characterized
single-crystal
X-ray
diffraction,
elemental
analysis,
thermogravimetric
analysis
powder
diffraction.
The
diffraction
structure
indicates
that
complex
1
belongs
to
orthorhombic
crystal
system
the
Pbcn
space
group.
In
1,
CAS
are
interconnected
form
a
2D
diamond
structure.
layers
interlinked
L4-
generate
3D
network
Complex
2
crystallizes
tetragonal
group
of
I41/acd.
ligands,
in
cross-linked
planar
is
formed
bonds
between
layers.
fluorescence
sensing
experiments
indicate
complexes
could
detect
p-nitrophenol
(4-NP)
quenching
high
sensitivity
selectivity,
detection
limits
were
0.344
0.554
μmol·L-1,
respectively.
can
also
be
used
for
highly
sensitive
selective
fluazinam
(FLU)
limit
0.185
μmol·L-1.
Additionally,
mechanism
investigated.
Dalton Transactions,
Год журнала:
2023,
Номер
53(2), С. 394 - 409
Опубликована: Ноя. 13, 2023
Recent
progress
in
luminescent
metal–organic
frameworks
for
detecting
ions,
volatile
organic
compounds,
biomolecules
and
environmental
toxins
device
fabrication
has
been
reviewed.
Analytical Chemistry,
Год журнала:
2024,
Номер
96(35), С. 14248 - 14256
Опубликована: Авг. 21, 2024
Precise
and
rapid
identification
of
pesticides
is
crucial
to
ensure
a
green
environment,
food
safety,
human
health.
However,
complex
sample
environments
often
hinder
precise
identification,
especially
for
simultaneous
differentiation
multiple
pesticides.
Herein,
we
first
synthesize
Eu(III)-functionalized
HOF-on-HOF
composite
(Eu@PFC-1@MA-TPA)
then
utilize
principal
component
analysis
(PCA)
machine
learning
(ML)
algorithm
achieve
the
2,6-dichloro-4-nitroaniline
(DCN)
thiabendazole
(TBZ)
their
mixtures.
Eu@PFC-1@MA-TPA
displays
high
quantitative
ability,
which
can
distinguish
single
DCN
TBZ
as
low
1
μM
mixtures
at
5
through
PCA.
In
addition,
hydrogel
film
Eu@PFC-1@MA-TPA/AG
fabricated
monitor
in
drinking
water,
tap
river
apple
juice
with
sensitivity.
Furthermore,
based
on
obvious
fluorescence
color
variance
pesticides,
achieves
visual
situ
imaging
detection
More
importantly,
construct
an
intelligent
artificial
vision
platform
integrating
DenseNet
algorithm,
identify
concentrations
types
within
s
over
98%
accuracy.
This
work
develops
method
combining
visualized
sensor
ML
algorithm.
Abstract
Misuse
of
antibiotics
and
pesticides
has
led
to
hazardous
effects
on
human
health,
livestock,
agriculture,
aquaculture,
which
urges
researchers
find
simple,
rapid,
efficient,
cost‐effective
methods
for
quick
on‐site
analysis
these
organic
pollutants
with
functional
materials.
Herein,
a
2D
chemically
robust
MOF:
IITKGP‐71
,
{[Cd(MBPz)(2,6‐NDC)]·2H
2
O}
n
is
strategically
developed
ease
in
scalability
exploited
as
dual
sensors
toward
the
toxic
antibiotic
pesticide
detection
via
luminescence
quenching
aqueous
medium
.
The
framework
displays
exceptional
chemical
robustness
water
3
months,
an
open
atmosphere
over
wide
range
pH
solution
(pH
=
3–12)
day.
can
selectively
quench
nitrofuran
(NFZ
NFT)
organochlorine
DCN
while
remaining
unaffected
by
other
interfering
pesticides,
respectively.
An
excellent
trade‐off
between
high
effectivity
(high
K
sv
)
sensitivity
(low
LOD)
was
achieved
targeted
analytes.
easy
scalability,
stability,
fast
responsivity,
multi‐responsive
nature,
recyclability
outstanding
structural
stability
made
this
viable
playing
crucial
role
safeguarding
aquatic
ecosystems
public
health
from
pesticides.
Inorganic Chemistry,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 28, 2025
Pyrazine
(tppz)
and
5-sulfosalicylic
acid
(H3SSA)
mixed-bridging
Cd(II)-CP,
{[Cd2(HSSA)2(tppz)2]}n
(1),
is
highly
luminescent,
the
emission
has
been
quenched
selectively
by
Al3+
in
presence
of
other
cations,
with
a
limit
detection
(LOD)
43.9
nM
(1.18
ppb).
The
1
also
4-nitroaniline
(4-NA)
(LOD,
49
nM)
dicloran
(2,6-dichloro-4-nitroaniline,
DCN),
pesticide
42.8
nM),
an
aqueous
medium
existence
11
nitroaromatic
compounds
(NACs).
structure
probe,
1,
shows
diverse
bridging
pyridyl-N
tppz
carboxylate-O
HSSA2-
to
architect
2D
CP
16-member
metallo-macrocycle,
followed
S═O···Cd(II)
(2.291(2)
Å),
π···π
(3.892
C-H···π
noncovalent
interactions
form
3D
supramolecular
cavity.
phenolic-OH
remains
uncoordinated
cavity
network.
Upon
interaction
Al3+/4-NA/DCN
Cd(II)-CP
free
may
induce
easy
dissociation,
which
assist
energy
transfer
for
quenching.
explained
through
various
experiments
theoretical
calculations.
DFT
computation
determines
band
gap
as
3.42
eV
(experimentally,
3.18
eV),
motivated
measure
electrical
conductivity.
conductivity,
3.53
×
10-5
S
m-1
(dark),
enhanced
upon
light
irradiation
7.66
m-1.
