Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 9, 2024
Abstract
The
contradiction
of
near‐infrared
II
(NIR‐II)
emission
and
photothermal
effects
limits
the
development
phototheranostic
agents
(PTAs)
in
many
emerging
cutting‐edge
applications.
Organic
aggregates
present
a
promising
opportunity
for
balance
competitive
relaxation
processes
through
manipulation
molecular
structure
packing.
Herein,
side
chain
phenyl
isomerization‐induced
spatial
conjugation
was
proposed
constructing
A‐D‐A
type
NIR‐II
PTAs
with
simultaneous
enhancement
fluorescence
brightness
properties.
Three
pairs
mutually
isomeric
fluorophores,
whose
phenyls
respectively
located
at
outside
(
o
‐series)
inside
i
chain,
were
designed
synthesized.
positional
isomerization
endows
‐series
crystals
strong
between
group
on
backbone,
as
well
interlocked
planar
network,
which
is
different
to
that
observed
‐series.
Thus,
all
nanoparticles
(NPs)
exhibit
red‐shifted
absorption,
enhanced
emission,
superior
properties
than
their
counterparts.
A
prominent
member
‐series,
‐ITNP
NPs,
demonstrated
efficacy
facilitating
angiography,
tumor
localization,
imaging‐guided
therapy.
success
this
strategy
paves
way
precise
control
aggregation
behavior
further
efficient
PTAs.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(20), P. 7803 - 7815
Published: Jan. 1, 2024
A
tin-free
asymmetric
small-molecule
guest
donor
(
o
PhFO)
with
a
wide
bandgap
allows
PM6:
PhFO:BTP-ec9
ternary
OSCs
to
reach
champion
efficiency
of
19.5%
by
optimizing
blend
morphology
and
vertical
phase
separation
as
well
reducing
energy
loss.
ChemSusChem,
Journal Year:
2024,
Volume and Issue:
17(21)
Published: May 28, 2024
Asymmetric
non-fullerene
small
molecules
acceptor
(as-NF-SMAs)
exhibit
greater
vitality
in
photovoltaic
materials
compared
to
their
symmetric
counterparts
due
larger
dipole
moments
and
stronger
intermolecular
interactions,
which
facilitate
exciton
dissociation
charge
transmission
organic
solar
cells
(OSCs).
Here,
we
introduced
a
new
as-NF-SMAs,
named
IDT-TNIC,
as
the
third
component
ternary
(TOSCs).
The
asymmetric
IDT-TNIC
used
indacenodithiophene
(IDT)
central
core,
alkylthio-thiophene
unilateral
π-bridge
extended
end
groups
electron-withdrawing.
Due
non-covalent
conformational
lock
(NCL)
established
between
O⋅⋅⋅S
S⋅⋅⋅S,
molecule
preserves
its
coplanar
structure
effectively.
Furthermore,
exhibits
complementary
absorption
excellent
compatibility
with
donor
materials,
well
optimized
ladder
energy
level
arrangement,
resulting
higher
more
balanced
μ
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 27, 2024
Abstract
The
structural
revolutions
of
non‐fullerene
acceptors
(NFAs)
have
driven
continuous
efficiency
breakthroughs
in
organic
solar
cells
(OSCs).
Rational
regulation
NFA
structures
toward
efficient
exciton
dissociation
and
mitigated
non‐radiative
recombination
is
pivotal
for
OSCs.
incorporation
asymmetric
side
chains
on
NFAs
can
often
achieve
these
goals
by
inducing
a
desirable
aggregate
state.
However,
it
lacks
the
studies
to
directly
correlate
side‐chain
symmetry
with
delocalization
triplet
dynamics
Herein,
influence
properties
systematically
investigated
exciton/charge
based
two
developed
biaxial‐conjugated
varied
symmetry.
symmetric
having
diverse
molecular
packing
orientations
form
multiple
charge
transfer
channels
its
blend
polymer
donor,
which
cannot
be
found
that
comprising
ones.
Moreover,
slower
rate
lower
ratio
spin‐triplet
state
are
formed
NFA,
resulting
much
voltage
loss
corresponding
This
study
reveals
distinct
advantages
both
over
those
ones,
paving
way
developing
high‐performance
OSCs
using
easier‐to‐prepare,
low‐cost
materials.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 9, 2024
The
contradiction
of
near-infrared
II
(NIR-II)
emission
and
photothermal
effects
limits
the
development
phototheranostic
agents
(PTAs)
in
many
emerging
cutting-edge
applications.
Organic
aggregates
present
a
promising
opportunity
for
balance
competitive
relaxation
processes
through
manipulation
molecular
structure
packing.
Herein,
side
chain
phenyl
isomerization-induced
spatial
conjugation
was
proposed
constructing
A-D-A
type
NIR-II
PTAs
with
simultaneous
enhancement
fluorescence
brightness
properties.
Three
pairs
mutually
isomeric
fluorophores,
whose
phenyls
respectively
located
at
outside
(o-series)
inside
(i-series)
chain,
were
designed
synthesized.
positional
isomerization
endows
o-series
crystals
strong
between
group
on
backbone,
as
well
interlocked
planar
network,
which
is
different
to
that
observed
i-series.
Thus,
all
nanoparticles
(NPs)
exhibit
red-shifted
absorption,
enhanced
emission,
superior
properties
than
their
i-series
counterparts.
A
prominent
member
o-series,
o-ITNP
NPs,
demonstrated
efficacy
facilitating
angiography,
tumor
localization,
imaging-guided
therapy.
success
this
strategy
paves
way
precise
control
aggregation
behavior
further
efficient
PTAs.
Molecules,
Journal Year:
2024,
Volume and Issue:
29(12), P. 2805 - 2805
Published: June 12, 2024
The
diketopyrrolopyrrole
(DPP)
unit
represents
one
of
the
building
blocks
more
widely
employed
in
field
organic
electronics;
most
reported
DPP-based
small
molecules,
this
electron
acceptor
core
symmetrically
coupled
to
donor
moieties,
and
solubility
is
guaranteed
by
functionalizing
lactamic
nitrogens
with
long
branched
alkyl
tails.
In
paper,
we
explored
possibility
modulating
realizing
asymmetric
DPP
derivatives,
where
molecular
structure
extended
just
direction.
Four
novel
derivatives
have
been
prepared,
characterized
a
common
dithyenil-DPP
fragment
functionalized
on
side
thiophene
linked
different
auxiliary
groups.
As
compared
previously
symmetric
analogs,
dyes
showed
an
increased
chloroform
proved
be
soluble
THF
as
well.
underwent
thorough
optical
electrochemical
characterization.
Electronic
properties
were
studied
at
DFT
levels.
All
used
active
layers
effect
transistors,
showing
balanced
charge
transport
properties.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 9, 2024
Abstract
The
contradiction
of
near‐infrared
II
(NIR‐II)
emission
and
photothermal
effects
limits
the
development
phototheranostic
agents
(PTAs)
in
many
emerging
cutting‐edge
applications.
Organic
aggregates
present
a
promising
opportunity
for
balance
competitive
relaxation
processes
through
manipulation
molecular
structure
packing.
Herein,
side
chain
phenyl
isomerization‐induced
spatial
conjugation
was
proposed
constructing
A‐D‐A
type
NIR‐II
PTAs
with
simultaneous
enhancement
fluorescence
brightness
properties.
Three
pairs
mutually
isomeric
fluorophores,
whose
phenyls
respectively
located
at
outside
(
o
‐series)
inside
i
chain,
were
designed
synthesized.
positional
isomerization
endows
‐series
crystals
strong
between
group
on
backbone,
as
well
interlocked
planar
network,
which
is
different
to
that
observed
‐series.
Thus,
all
nanoparticles
(NPs)
exhibit
red‐shifted
absorption,
enhanced
emission,
superior
properties
than
their
counterparts.
A
prominent
member
‐series,
‐ITNP
NPs,
demonstrated
efficacy
facilitating
angiography,
tumor
localization,
imaging‐guided
therapy.
success
this
strategy
paves
way
precise
control
aggregation
behavior
further
efficient
PTAs.
