Abstract
There
is
a
notable
shift
toward
organic
functional
materials
for
their
advantages
in
terms
of
availability,
processability
and
biodegradability.
Solid‐state
emitters,
though
rare,
are
fascinating
with
diverse
range
applications.
In
this
work
we
utilize
crystal
engineering
principles
to
design
Schiff
bases
1
2
,
realize
solid
state
emission
its
tuning.
The
products
have
been
characterized
studied
through
crystallographic,
Hirshfeld,
optical
studies.
Structural
studies
validate
crystallization
molecule
methanol
water,
respectively,
packing
predominantly
aided
by
solvent
assisted
hydrogen
bonding,
while
the
π‐π
stacking
interactions
absent.
Crystalline
solids
emissive:
(
λ
max
474
nm,
τ
0.35
±
0.04
ns)
(481
1.80
0.07
aggregation
induced
(AIE)
active.
Mechano
thermo‐fluorochromic
responses
attributed
phase
changes
triggered
grinding
desolvation,
respectively.
nonemissive
solutions
detect
presence
Pb(II)
/Hg(II)
turn‐on,
limit
detection
(LOD)
values
0.0017–0.0022
ppb,
picric
acid
sensing
reported
AIE
luminogen
(AIEgen)
forms
LOD
0.0017
ppb
0.0034
New Journal of Chemistry,
Год журнала:
2024,
Номер
48(24), С. 11090 - 11098
Опубликована: Янв. 1, 2024
Solid-state
emission
tuning
in
an
organic
salt
based
on
a
sulfonate–pyridinium
synthon
has
been
realized,
and
the
reported
to
exhibit
multi-stimuli
fluorochromic
response
towards
fumes,
grinding,
heat.
Crystals,
Год журнала:
2024,
Номер
14(6), С. 497 - 497
Опубликована: Май 24, 2024
A
series
of
novel
salts
heterocyclic
polyamines
with
5-sulfosalicylic
acid
(C4H7N4+)(C7H5O6S−)∙2(H2O)
(1),
(C4H6ClN4+)(C7H5O6S−)∙H2O
(2),
(C5H8N3+)(C7H5O6S−)∙H2O
(3),
(C5H7N6+)(C7H5O6S−)∙H2O
(4),
(C6H14N22+)(C7H4O6S2−)∙H2O
(5),
and
(C14H19N2+)(C7H5O6S−)
(6)
have
been
successfully
synthesized.
Their
crystal
structures
determined
by
single-crystal
X-ray
diffraction.
Overall,
compounds
adopt
a
layered
structure
aminium
cations
anions
linked
via
water
molecules.
The
solid-state
architectures
these
are
dominated
O(N,H)-H⋯O
N-H⋯N
hydrogen
bonds
stabilized
weak
interconnects.
C-Cl⋯π
S-O⋯π
interactions,
apart
from
π⋯π
C-H(O)⋯π,
were
reported.
Diverse
approaches
used
to
study
the
effect
substituents
in
arrangement.
Hirshfeld
surface
analysis,
associated
3D
maps
2D
fingerprint
plots,
molecular
electrostatic
potential,
energy
frameworks
comprehensively
investigate
nature
hierarchy
non-covalent
interactions
inspect
supramolecular
differences.
contact
enrichment
ratio
calculations
provided
deeper
insight
into
propensity
interconnects
influence
packing.
evaluation
effects
H-bonding
synthons
resulting
different
on
self-assemblies
is
also
presented.
In
context
engineering,
specific
intramolecular
synthon
O-H⋯O
observed
nearly
all
crystals
can
be
employed
pseudo-cyclic
replacement
strategy
design
new
The Journal of Physical Chemistry C,
Год журнала:
2024,
Номер
128(44), С. 18901 - 18912
Опубликована: Окт. 29, 2024
Polymorphism
in
organic
compounds
is
a
fascinating
phenomenon
with
diverse
applications.
Rational
development
of
polymorphic
forms
challenging
and
demands
more
investigations.
Subtle
variations
functional
groups
can
lead
to
variation
intra-
as
well
intermolecular
interactions
promote
polymorphism.
We
report
chlorinated
sulfonated
Anil
1
its
crystallization
two
forms,
1a
1b,
which
are
conformational
polymorphs.
Structural
studies
reveal
polymorphism
arises
due
rotation
about
the
C═N–C═C
bond
subsequent
prototropism,
planar
form
exists
keto
while
twisted
1b
an
enol
tautomer.
Color
attributed
difference
extent
molecular
conjugation,
emission
switching
packing.
Density
theory
(DFT)
have
been
carried
out
understand
packing
explain
optical
properties.
To
further
effect
nature
halogen
atoms
on
electronic
properties,
bromo
iodo
derivatives
reported
studied.
Aggregation-induced
(AIE)
sensitivity
acids,
nitroaromatics
like
picric
acid,
heavy
metal
ions
Hg(II)
for
ACS Applied Optical Materials,
Год журнала:
2024,
Номер
2(11), С. 2229 - 2240
Опубликована: Окт. 30, 2024
Stimuli-responsive
organic
materials
with
configurable
luminescence
are
an
important
class
of
potential
use
in
sensing,
data
security,
and
display
devices.
Emergent
vapofluorochromic
materials,
the
ability
to
sense
detect,
significant
for
real-time
applications
across
sectors.
Specific
market
demand
varies
based
on
technological
advancements,
regulatory
changes,
industry
trends,
making
discovery
such
advanced
essential.
Aiming
design
engineering
solid-state
emission,
we
report
synthesis
characterization
three
simple
Schiff
bases
1–3,
nonplanar
propeller
triphenylphosphine
functionality
one
end
functional
group
variation
other
end.
Contrarily,
molecular
solids
1
2
undergo
emission
quenching,
while
feeble
3
(λmax
573
nm,
ϕ
16%,
τ
3.118
ns)
arises
due
H-aggregate
formation.
Solid-state
is
further
validated
by
aggregation-induced
thin-film
studies.
Existing
as
zwitterionic
solids,
intramolecular
proton
transfer
acidic
proton,
solid
forms
respond
base
exposures
observed
during
thin
film
studies,
detailed
vapochromic
studies
establish
reversible
switching
tuning
3.
Working
a
demonstrative
wearable
sensor
detection
ammonia
fumes
reported.
Electrochemical,
crystallographic,
computational,
mechanochromic
have
been
carried
out
understand
structure–function
relationship.
