Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(26)
Published: April 16, 2024
Abstract
To
develop
new
hybrid
micelles
with
alkyl/polyaromatic
core–shell
structures,
we
synthesized
umbrella‐shaped
amphiphiles
bearing
a
bent
anthracene
dimer
linear
alkyl
chain
(i.e.,
octyl
and
hexadecyl
groups).
The
quantitatively
assemble
into
spherical
(~2–3
nm
in
core
diameter),
possessing
an
alkylated
cavity
surrounded
by
polyaromatic
framework,
water.
alkylation
significantly
enhances
the
stability
of
micellar
structures
against
dilution
(up
to
9
μM)
heat
>120
°C).
highly
condensed
micelle,
as
indicated
solvatochromic
guest
probes,
displays
increased
uptake
ability
toward
large
metallodyes.
Interestingly,
efficient
aromatic
macrocycles
[
n
]cycloparaphenylenes)
present
micelle
provides
pseudorotaxane‐shaped
host–guest
composites
high
emissivity
(
Φ
F
=up
35
%).
Internal
multi‐alkylation
can
thus
successfully
enhance
its
assembly
stability/guest
functions.
Chemistry - A European Journal,
Journal Year:
2023,
Volume and Issue:
29(67)
Published: Oct. 24, 2023
Controlling
the
coordination
sphere
of
heterogeneous
single-metal-site
catalysts
is
a
powerful
strategy
for
fine-tuning
their
catalytic
properties
but
fairly
difficult
to
achieve.
To
address
this
problem,
we
immobilized
supramolecular
cages
where
primary-
and
secondary
are
controlled
by
ligand
design.
The
kinetics
these
were
studied
in
model
reaction,
hydrolysis
ammonia
borane,
over
temperature
range
using
fast
precise
online
measurements
generating
high-precision
Arrhenius
plots.
results
show
how
can
be
enhanced
placing
well-defined
reaction
pocket
around
active
site.
Our
yielded
catalyst
with
such
performance
that
diffusion-controlled
rather
than
chemically
controlled.
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
89(13), P. 9488 - 9495
Published: June 24, 2024
In
contrast
to
self-assembly
in
solution
systems,
the
construction
of
well-defined
assemblies
solid
state
has
long
been
identified
as
a
challenging
task.
Herein,
we
report
formation
tweezers-shaped
molecules
into
various
through
solid-state
strategy.
The
relatively
flexible
molecular
tweezers
undergo
exclusive
and
quantitative
assembly
either
cyclic
hexamers
or
porous
network
classical
recrystallization
exposure
powders
solvent
vapor,
despite
fact
that
they
form
only
dimers
solution.
have
high
thermal
stability
exhibit
moderate
fluorescence.
heterologous
consisting
different
allows
for
tuning
these
properties
hexamer.
Furthermore,
(trimethylsilyl)ethynyl-substituted
demonstrate
solvent-vapor-induced
dynamic
interconversion
between
hexamer
pseudocyclic
dimer
state.
This
behavior,
which
studied
extensively
solution-based
supramolecular
chemistry,
had
not
accomplished
so
far.
Chemistry - A European Journal,
Journal Year:
2023,
Volume and Issue:
29(63)
Published: Aug. 9, 2023
Utilizing
experimental
and
computational
vibrational
circular
dichroism
(VCD)
spectroscopy,
we
explored
the
conformational
preferences
of
a
series
chiral
C3
-symmetric
octaazacryptands
with
tris(2-aminoethyl)-amine
head
groups
derived
from
valine.
While
spectra
smallest
azacryptand
p-phenyl
linkers
its
elongated
derivative
p-biphenyls
linker
were
found
to
match
well
computed
spectra,
m-biphenyl-based
did
not
seem
reflect
conformations
dominating
in
chloroform
solution.
A
detailed
analysis
revealed
that
structural
changes
resulting
collapsed
cage
structure
gave
notably
better
experiment.
It
could
subsequently
be
concluded
VCD
analysis,
prefer
structure,
which
is
predicted
by
density
functional
theory
(DFT)
calculations
as
global
minimum
structures.
These
findings
are
expected
have
consequences
also
for
future
studies
on
inclusion
complexes
such
azacryptands.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(23)
Published: April 5, 2024
Abstract
A
dinuclear
metal‐organic
cage
with
four
acrylate
side
chains
was
prepared
by
self‐assembly.
Precipitation
polymerization
of
the
N‐isopropylacrylamide
yielded
a
thermoresponsive
nanogel.
The
host
properties
were
retained
within
gel
matrix,
endowing
nanogel
capability
to
serve
as
sorbent
for
chloride
ions
in
water.
Moreover,
heteroleptic
drug
abiraterone
co‐ligand
integrated
into
addition
induced
structural
rearrangement
metal‐ligand
assembly,
resulting
gradual
release
abiraterone.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(26)
Published: April 16, 2024
Abstract
To
develop
new
hybrid
micelles
with
alkyl/polyaromatic
core–shell
structures,
we
synthesized
umbrella‐shaped
amphiphiles
bearing
a
bent
anthracene
dimer
linear
alkyl
chain
(i.e.,
octyl
and
hexadecyl
groups).
The
quantitatively
assemble
into
spherical
(~2–3
nm
in
core
diameter),
possessing
an
alkylated
cavity
surrounded
by
polyaromatic
framework,
water.
alkylation
significantly
enhances
the
stability
of
micellar
structures
against
dilution
(up
to
9
μM)
heat
>120
°C).
highly
condensed
micelle,
as
indicated
solvatochromic
guest
probes,
displays
increased
uptake
ability
toward
large
metallodyes.
Interestingly,
efficient
aromatic
macrocycles
[
n
]cycloparaphenylenes)
present
micelle
provides
pseudorotaxane‐shaped
host–guest
composites
high
emissivity
(
Φ
F
=up
35
%).
Internal
multi‐alkylation
can
thus
successfully
enhance
its
assembly
stability/guest
functions.
