Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(40)
Published: July 5, 2024
Abstract
In
this
work,
a
noncoplanar
terphenyl
served
as
building
block
to
synthesize
novel
3,3′‐substituted
bipyridyl
ligand
(
L1
)
which
further
reacted
with
binuclear
half‐sandwich
units
A/B
,
giving
rise
two
aesthetic
4
1
metalla‐knots
in
high
yields
via
coordination‐driven
self‐assembly
strategy.
Furthermore,
given
the
inherent
compactness
of
metalla‐knots,
it
creates
favorable
conditions
for
emergence
steric
repulsion.
We
focused
on
progressively
introducing
nitrogen
atoms
featuring
lone
pair
electrons
(LPEs)
into
manipulate
balance
H⋅⋅⋅H/LPEs⋅⋅⋅LPEs
repulsion
during
assembly
process,
ultimately
achieving
controlled
from
pseudo
‐Solomon
link
and
then
molecular
tweezer‐like
facilitated
by
stacking
interactions.
All
assemblies
were
well
characterized
solution‐state
NMR
techniques,
ESI‐TOF/MS,
single‐crystal
X‐ray
diffraction.
The
evolutionary
process
topological
architectures
is
equivalent
visualizing
synergistic
effect
hindrance
interactions
structural
assembly,
providing
new
avenue
synthesis
different
topologies.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(24)
Published: April 4, 2024
Abstract
While
metal‐mediated
self‐assembly
is
a
popular
technique
to
construct
discrete
nanosized
objects,
highly
symmetric
structures,
built
from
one
type
of
ligand
at
time,
are
dominating
reported
systems.
The
tailored
integration
set
different
ligands
requires
sophisticated
approaches
avoid
narcissistic
separation
or
formation
statistical
mixtures.
Here,
we
demonstrate
how
the
combination
three
structure‐guiding
effects
(metal‐templated
macrocyclization,
additional
bridging
and
shape‐complementarity)
based
on
Co(III)salphen
metal
nodes
allows
for
rational
high‐yielding
synthesis
structurally
complex,
lantern‐shaped
cages
with
up
four
differentiable
bridges.
Three
new
heteroleptic
coordination
dinuclear
macrocycles
were
synthesized
in
one‐pot
reaction
approach
fully
characterized,
including
single
crystal
X‐ray
analyses.
One
cage
groups
two
same
ligands,
another
around
Co
2
‐bis‐salphen
ring.
In
most
complex
structure,
this
ring
unsymmetric,
rendering
all
connections
between
centers
distinguishable.
assembly
Pd(II)
has
been
shown
be
dynamic,
beneficial
cage‐to‐cage
transformations,
cascades
adaptive
systems,
herein
introduced
kinetically
more
inert
will
advantageous
applications
enzyme‐like
catalysis
molecular
machinery
that
require
enhanced
structural
chemical
stability.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 20, 2024
In
this
work,
a
noncoplanar
terphenyl
served
as
building
block
to
synthesize
novel
3,3'-substituted
bipyridyl
ligand
(L1)
which
further
reacted
with
binuclear
half-sandwich
units
A/B,
giving
rise
two
aesthetic
4
Inorganic Chemistry Frontiers,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
article
presents
the
influence
of
lanthanide
size
and
ligands
conformational
flexibility
on
assemblies
their
corresponding
luminescent
properties.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 21, 2025
Imide-based
chlorinating
reagents
are
mild
and
easy
to
use
yet
can
lack
the
reactivity
of
charged
chlorenium-ion
donors.
Here,
we
present
a
simple
strategy
for
increasing
these
neutral
species
by
encapsulation
inside
cationic
coordination
cage.
Using
this
approach,
demonstrate
that
two
different-sized
Pd2L4
cages
catalyze
chlorolactonization
chlorocycloetherification
reactions
acid
alcohol
functionalized
α
β-substituted
styrene
substrates
with
either
1,3-dichloro-5,5-dimethylhydantoin
(DCDMH)
or
N-chlorosuccinimide
(NCS)
as
chlorenium
sources.
A
kinetic
study
shows
proficient
catalysts
significant
acceleration
up
105.
However,
an
unexpected
dichotomy
is
revealed
wherein
smaller
cage,
which
best
preorganized
bind
nominally
provide
maximum
activation
imide
reagent,
order
magnitude
less
than
larger
cage
has
apparently
mismatched
host–guest
chemistry.
When
scope
further
extended
chlorination
simple,
unfunctionalized
α-methylstyrene,
same
pattern
observed,
suggesting
differences
not
explained
coencapsulation.
Computational
studies
indicate
trend
in
caused
transition
state
being
fixed
allowing
it
find
optimal
binding
thereby
generate
stronger
interactions.
This
investigation
highlights
importance
understanding
underlying
mechanisms
design
new
noncovalent
greater
range
transformations.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 29, 2025
Self-sorting
exerts
a
pivotal
role
in
biological
self-assembly
processes,
enabling
the
hierarchical
organization
of
biomacromolecules
with
exquisite
selectivity.
Inspired
by
nature,
we
present
programmable
supramolecular
coordination
system
where
two
types
ligands
undergo
sequential
narcissistic
and
social
self-sorting
events
to
assemble
either
homoleptic
or
heteroleptic
metal-organic
cages.
Homoleptic
cage
formation
proceeds
through
rigid
flexible
ligands,
depending
on
their
varying
sizes,
whereas
cages
emerge
self-sorting,
adaptive
conformational
adjustments
achieve
geometric
complementarity
counterparts.
Notably,
this
sorting
behavior
exhibits
progressive
enhancement
ligand
size
expansion,
facilitating
cascaded
when
alternating
components
along
dimensional
gradient
are
sequentially
introduced.
Furthermore,
introduction
hydrogen-bonding
constraints
modifies
flexibility
capacity,
thereby
redirecting
pathways
toward
distinct
outcomes.
This
study
lays
foundation
for
advancing
field
systems
chemistry,
emphasizing
potential
developing
multistage
assembly
cascades.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: June 1, 2025
Abstract
Supramolecular
self‐assembly
of
stacked
architectures
is
typically
achieved
through
hydrogen
bonding
or
π–π
interactions
between
monomers
constructed
from
stable
and
inert
bonds.
In
contrast,
coordinative
early
metals
promise
distinct
behaviour
due
to
more
flexible
geometries
a
wider
range
stabilities
exchange
kinetics.
this
report
we
demonstrate
that
tailoring
the
coordination
sphere
Zinc(II)
complexes
via
subtle
ligand
modification
promotes
not
only
one
but
also
three‐dimensional
both
thermodynamically
kinetically
into
higher‐order
fibrous
morphologies,
latter
being
elucidated
by
electron
tomography.
As
result,
chemistry
can
be
translated
nanoscopic
(fibre
stiffness)
macroscopic
(thermal
gel
stability)
material
properties.
Utilizing
dynamicity
enables
gelation
subcomponent
self‐assembly,
constructing
supramolecular
polymer
network
simultaneously
with
monomer.
Furthermore,
dis‐
reassembly
metal‐ligand
reactions
involving
first
second
spheres
allows
for
control
over
emission
system.
Our
links
concepts
in
leveraging
unique
cannot
traditional
monomers,
promising
applications
stimuli‐responsive
optoelectronics.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(45), P. 30958 - 30965
Published: Nov. 4, 2024
A
key
feature
of
coordination
cages
is
the
dynamic
nature
their
coordinative
bonds,
which
facilitates
synthesis
complex
polyhedral
structures
and
post-assembly
modification.
However,
this
can
limit
cage
stability.
Increasing
robustness
important
for
real-world
use
cases.
Here
we
introduce
a
double-bridging
strategy
to
increase
stability,
where
designed
pairs
bifunctional
subcomponents
combine
generate
rectangular
tetratopic
ligands
within
pseudo-cubic
Zn8L6
cages.
These
withstand
transmetalation,
addition
competing
ligands,
nucleophilic
imines,
under
conditions
single-bridged
congeners
decompose.
Our
approach
not
only
increases
stability
while
maintaining
structure,
but
also
enables
incorporation
additional
functional
units
in
proximity
cavity.
The
larger
cages,
are
inaccessible
as
congeners.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(24)
Published: April 4, 2024
Abstract
Während
die
metallvermittelte
Selbstassemblierung
eine
beliebte
Methode
zur
Synthese
definierter
Nanoobjekte
ist,
wird
Literatur
von
hochsymmetrischen
Strukturen,
aufgebaut
aus
jeweils
einer
Art
Liganden,
dominiert.
Die
kontrollierte
Integration
Reihe
verschiedener
Liganden
erfordert
ausgeklügelte
Ansätze,
um
narzisstische
Trennung
oder
Bildung
statistischer
Mischungen
zu
vermeiden.
Hier
zeigen
wir,
wie
Kombination
drei
strukturleitenden
Effekten
(metallvermittelte
Makrozyklisierung,
zusätzliches
Anbringen
Brückenliganden
und
Formkomplementarität)
auf
der
Grundlage
Co(III)salphen‐Metallzentren
rationale
laternenförmigen
Käfigen
mit
bis
vier
differenzierbaren
Brücken
ermöglicht.
Drei
neue
heteroleptische
Koordinationskäfige,
basierend
zweikernigen
Co(III)salphen‐Makrozyklen,
wurden
in
Eintopfreaktion
synthetisiert
vollständig
charakterisiert,
einschließlich
Einkristall‐Röntgenstrukturanalysen.
Einer
Käfige
gruppiert
zwei
gleiche
ein
anderer
verschiedene
einen
symmetrischen
Co
2
‐Bis‐Salphen‐Ring.
In
komplexesten
Struktur
ist
dieser
Ring
unsymmetrisch,
so
dass
alle
zwischen
den
beiden
Metallzentren
unterscheidbar
sind.
sich
Assemblies
Pd(II)‐Zentren
als
dynamisch
vorteilhaft
für
Käfig‐zu‐Käfig‐Umwandlungen
adaptive
Systeme
erwiesen
haben,
werden
hier
vorgestellten
kinetisch
stabileren
Co(III)‐Salphen
Einheiten
Anwendungen,
erhöhte
strukturelle
chemische
Stabilität
erfordern,
Vorteil
sein,
z.B.
enzymähnlichen
Katalyse
molekularen
Maschinen.