Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(46)
Опубликована: Июль 19, 2024
Abstract
Photonic
heterostructures
with
codable
properties
have
shown
great
values
as
versatile
information
carriers
at
the
micro‐
and
nanoscale.
These
are
typically
prepared
by
a
step‐by‐step
growth
or
post‐functionalization
method
to
achieve
varied
emission
colors
different
building
blocks.
In
order
realize
high‐throughput
multivariate
loading,
we
report
here
strategy
integrate
polarization
signals
into
photonic
heterojunctions.
A
U‐shaped
di‐Pt(II)
complex
has
been
assembled
highly
polarized
yellow‐phosphorescent
crystalline
microrods
(Y‐rod)
strong
intermolecular
Pt⋅⋅⋅Pt
interaction.
Upon
end‐initiated
desorption
of
incorporated
CH
2
Cl
solvents,
Y‐rod
is
transformed
in
domino
fashion
tri‐block
heterojunctions
(PPHs)
alternate
red‐yellow‐red
emissions
red‐phosphorescent
(R‐rods).
The
red
these
structures
also
polarized;
however,
their
directions
just
orthogonal
those
yellow
phosphorescence
Y‐rod.
With
aid
patterned
mask,
R‐rod
can
be
further
programmed
multi‐block
PPHs
precisely
controlled
block
sizes
side‐allowed
adsorption
vapor.
X‐ray
diffraction
analysis
theoretical
calculations
suggest
that
solvent‐regulated
modulation
crystal
packing
excited‐state
property
critical
for
construction
PPHs.
Abstract
The
development
and
applications
of
materials
with
efficient
circularly
polarized
luminescence
(CPL)
have
become
an
interdisciplinary
frontier
research
topic.
We
summarize
herein
the
recent
advance
in
CPL‐active
aggregates
based
on
metal‐ligand
coordination
(termed
as
“coordination
aggregates”).
surveyed
are
classified
small‐molecular
metal
complexes,
which
include
monocomponent
assemblies
Pt(II)
complexes
other
binary
helicates,
polymers,
frameworks.
efforts
improving
dissymmetry
factors
quantum
yields
these
use
aggregation
strategy
enhancing
performance
isolated
molecules
discussed.
chiral
organic
light‐emitting
diodes
(OLEDs)
solution‐
or
evaporation‐processed
procedures
surveyed.
In
addition,
uses
lanthanide
CPL‐contrast
imaging
CPL
probes
highlighted.
common
discussion
mechanism
aggregation‐enhanced
CPLs
a
perspective
future
works
finally
given.
Advanced Materials,
Год журнала:
2024,
Номер
36(31)
Опубликована: Апрель 16, 2024
The
precise
manipulation
of
supramolecular
polymorphs
has
been
widely
applied
to
control
the
morphologies
and
functions
self-assemblies,
but
is
rarely
utilized
for
fabrication
circularly
polarized
luminescence
(CPL)
materials
with
tailored
properties.
Here,
this
work
reports
that
an
amphiphilic
naphthalene-histidine
compound
(NIHis)
readily
self-assembled
into
distinct
chiral
nanostructures
through
pathway-dependent
polymorphism,
which
shows
opposite
multistimuli
responsive
CPL
signals.
Specifically,
NIHis
display
assembly-induced
from
polymorphic
keto
tautomer,
become
predominant
during
enol-keto
tautomerization
shifting
controlled
by
a
bulk
solvent
effect.
Interestingly,
nanofiber
microbelt
inverted
signals
can
be
prepared
same
monomer
in
exactly
compositions
concentrations
only
changing
temperature.
tunable
performance
solid
microbelts
realized
under
multi
external
physical
or
chemical
stimuli
including
grinding,
acid
fuming,
heating.
In
particular,
emission
color
on-off
switch
based
on
polymorph
reversible
heating-cooling
protocol
developed.
This
brings
new
approach
developing
smart
via
polymorphism
engineering.
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(26), С. 14595 - 14600
Опубликована: Апрель 6, 2021
Abstract
A
simple
and
general
method
is
presented
herein
for
the
in
situ
preparations
of
circularly
polarized
luminescence
(CPL)‐active
microcrystals
with
a
large
dissymmetry
factor
g
lum
,
high
fluorescence
quantum
efficiency
(
Φ
FL
),
wide
emission
color
tenability,
well‐ordered
morphology.
The
reactions
pyridine‐containing
achiral
molecules
1
–
7
chiral
camphor
sulfonic
acid
((±)‐CSA)
gave
crystalline
microplates
formed
by
hydrogen
bonding
interactions
between
protonated
pyridinium
units
anions.
information
CSA
are
effectively
transferred
to
afford
full‐color
CPL
from
deep‐blue
red
order
10
−2
up
80
%.
Moreover,
organic
high‐performance
white
=46
%;
|
|=0.025)
achieved
via
light‐harvesting
energy
transfer
blue
yellow
emitters.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 23, 2024
Abstract
Catalytic
enantioselective
preparation
of
alkene
atropisomers
with
multiple
stereogenic
elements
and
discovery
their
applications
have
become
significant
but
challenging
issues
in
the
scientific
community
due
to
unique
structures
this
class
atropisomers.
We
herein
report
first
catalytic
atroposelective
cyclopentenyl[
b
]indoles,
a
new
kind
atropisomers,
point
axial
chirality
via
an
unusual
rearrangement
reaction
3‐indolylmethanols
under
asymmetric
organocatalysis.
Notably,
novel
type
promising
developing
chiral
ligands
or
organocatalysts,
discovering
antitumor
drug
candidates
fluorescence
imaging
materials.
Moreover,
theoretical
calculations
elucidated
possible
mechanism
non‐covalent
interactions
control
enantioselectivity.
This
approach
offers
synthetic
strategy
for
elements,
represents
3‐indolylmethanols,
which
will
advance
chemistry
indole
chemistry.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Дек. 4, 2023
Abstract
Developing
facile
and
efficient
methods
to
obtain
circularly
polarized
luminescence
(CPL)
materials
with
a
large
dissymmetry
factor
(
g
lum
)
fluorescence
quantum
yield
Φ
Y
is
attractive
but
still
challenging.
Herein,
supramolecular
polymerization
of
styrylpyrenes
R
/
S
-PEB)
utilized
attain
this
aim,
which
can
self-assemble
into
helical
nanoribbons.
Benefiting
from
the
dominant
CH-π
interactions
between
chromophores,
solution
-PEB
shows
remarkable
blue-color
CPL
property
:
0.011,
69%).
From
gel,
emission
color
(blue
yellow-green)
handedness
–0.011
+0.005)
are
concurrently
manipulated,
while
corresponding
chirality
maintains
unchanged,
representing
rare
example
color-dependent
materials.
Thanks
confine
effect,
[2
+
2]
cycloaddition
reaction
rate
10.5
times
higher
than
that
monomeric
solution.
In
contrast,
no
occurs
for
gel
assembled
solid
samples.
Our
findings
provide
vision
fabricating
multi-modal
high-performance
CPL-active
materials,
paving
way
development
advanced
photo-responsive
chiral
systems.
