A
key
factor
in
enhancing
molecular-level
detection
is
the
analyte's
potential
to
direct
a
visible
photophysical
characteristic.
Here,
we
describe
molecular
probe,
Xanth-CHO,
and
studies
on
how
ethylenediamine
(EDA)
1,3-diaminopropane
(DAP)
cause
fluorescence
turn-on
reactions
that
allow
their
an
aqueous
buffer.
Since
Xanth-CHO
aggregate
state
buffer,
presence
of
EDA
or
DAP
modifies
this
causes
probe
undergo
radiative
decay
by
producing
imine
products
Xanth-CHO.
The
intensity
rises
linearly
with
increasing
concentrations,
permitting
limit
at
nanomolar
level.
efficiency
detecting
has
been
demonstrated
competitive
analysis
evaluation
real
water
samples.
Further,
probe-coated
TLC
strips,
as
low-cost
tool,
were
deployed
for
vapor
phase
recognition
vapors
during
fish
spoilage.
JACS Au,
Journal Year:
2024,
Volume and Issue:
4(2), P. 545 - 556
Published: Jan. 23, 2024
The
exploration
of
emerging
functionalized
quantum
dots
(QDs)
through
modulating
the
effective
interaction
between
sensing
element
and
target
analyte
is
great
significance
for
high-performance
trace
sensing.
Here,
chromone-based
ligand
grafted
QDs
(QDs-Chromone)
were
initiated
to
realize
electronic
energy
transfer
(EET)
driven
specifically
by
ethylenediamine
(EDA)
in
absence
spectral
overlap.
fluorescent
colorimetric
dual-mode
responses
(from
red
blue
from
colorless
yellow,
respectively)
resulting
expanded
conjugated
ligands
reinforced
analytical
selectivity,
endowing
an
ultrasensitive
specific
response
submicromolar-liquid
EDA.
In
addition,
a
QDs-Chromone-based
chip
was
constructed
achieve
recognition
EDA
vapor
with
naked-eye
observed
at
concentration
as
low
10
ppm,
well
robust
anti-interfering
ability
complicated
scenarios
monitoring.
We
expect
proposed
EET
strategy
shaping
will
shine
light
on
both
rational
probe
design
methodology
deep
mechanism
exploration.
Journal of Materials Chemistry B,
Journal Year:
2024,
Volume and Issue:
12(11), P. 2746 - 2760
Published: Jan. 1, 2024
Maintaining
the
freshness
of
food
is
essential
for
a
healthy
and
quality
life.
Nevertheless,
it
remains
global
challenge.
Hence,
an
easy
detection
monitoring
protocol
would
be
highly
desirable.
A
cyanoacrylic
acid
(CAA)-based
fluorophore
manifested
as
reusable
platform
that
responds
diversely
against
different
concentrations
selective
aliphatic
biogenic
amines
(BAs)
in
both
solution
vapor
phases.
Slow
spoilage
protein-rich
progressively
monitored
through
emission
shifts
visible
to
naked
eye.
This
provides
naked-eye
BA
change
emission,
Communications Chemistry,
Journal Year:
2025,
Volume and Issue:
8(1)
Published: March 15, 2025
Abstract
The
strong
electrophilicity
of
arylpyrylium
salts
was
recognized
for
the
colorimetric
detection
vital
amine
analytes,
limited
to
ammonia
or
methylamines
and
putrescine
as
biogenic
amine.
This
report
presents
conformationally
twisted,
electrophilic
triphenylamine-linked
2,4,6-tristyryl
pyrylium
salt
PyTPA
a
single
dye
sense
various
aliphatic/aromatic
amines,
nicotine,
guanidine
rapidly
in
nanomolar
concentrations.
unexplored
styrylpyrylium
design
offers
specific
electronic
conjugations,
steric/geometric
constraints
with
hydrophobicity,
decent
thermal/photostability,
facilitating
precise
diverse
amines
unique
fashions.
deep-violet
solution/solid
responded
remarkably
at
298
K
quick
decoloration
against
putrescine,
cadaverine,
spermidine,
spermine,
histamines,
serotonin,
2-phenylethylamine.
Further,
this
could
detect
nicotine
313
distinctively
diminished
absorption
unexpected
red-shifted
emission
enhancement.
Variation
mechanistic
path
is
detecting
holding
mono/di-NH
2
groups
short/
long
alkane
chains,
elucidated
by
mass,
1
H-NMR,
FT-IR,
SEM,
PXRD,
XPS
studies.
notable
these
different
phases
employed
onsite
applications
fresh
chicken
tuna.
Nicotine
natural
tobacco
leaves
identified.
Such
provides
promising
advancements
class
molecules
biologically
significant
amines.
