ChemPlusChem,
Journal Year:
2024,
Volume and Issue:
89(11)
Published: July 18, 2024
Abstract
We
herein
report
the
facile
synthesis
of
two
helical
carbon
nanorings
with
small
ring
sizes,
cyclo[6]paraphenylene‐1,5‐naphthylene
(
[6]CPPNap
1,5
),
and
cyclo[6]paraphenylene‐1,5‐anthrylene
[6]CPPAn
).
The
structures
were
determined
by
NMR
HR‐MS.
X‐ray
single‐crystal
data
was
also
achieved.
strain
energy
racemization
processes
investigated
DFT
calculations.
reduced
sizes
result
in
increased
elevated
barriers.
photophysical
properties
studied
UV‐Vis
absorption,
fluorescence
emission,
time‐resolved
decay.
The
structure-directing
“key-to-lock”
interaction
of
double
-(I(III))-hole
donating
iodonium
cations
with
the
O-flanked
pseudo-lacune
rims
[β-Mo8O26]4–
gives
halogen-bonded
iodonium–beta-octamolybate
supramolecular
associates.
In
occurrence
their
tetragonal
pyramidal
motifs,
deep
and
broad
-(I(III))-holes
a
cation
recognize
molybdate
backbone,
which
provides
an
electronic
pool
localized
around
two
lacunes.
I∙∙∙O
linkages
in
structures
were
thoroughly
studied
computationally
classified
as
two-center,
three-center
bifurcated,
unconventional
“orthogonal”
halogen
bonds.
latter,
O-atom
approaches
orthogonally
C–I(III)–C
plane
this
geometry
diverge
from
IUPAC
criteria
for
identification
bond
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(18)
Published: Feb. 26, 2024
Abstract
“Improbable”
rotaxanes
consisting
of
interlocked
conjugated
components
represent
non‐trivial
synthetic
targets,
not
to
mention
those
with
all‐benzene
scaffolds.
Herein,
a
modular
strategy
has
been
established
using
an
isolable
azo‐linked
pre‐rotaxane
as
the
core
module,
in
which
azo
group
functions
tracelessly
removable
template
direct
mechanical
bond
formations.
Through
versatile
connections
and
other
customizable
modules,
[2]‐
[3]rotaxanes
derived
from
scaffolds
have
accomplished,
demonstrating
utility
potential
design
for
supramolecules.
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(20)
Published: Feb. 29, 2024
Abstract
The
highly
strained,
phenylene‐derived
organic
cages
are
typically
regarded
as
very
rigid
entities,
yet
their
deformation
potential
and
supramolecular
properties
remain
underexplored.
Herein,
we
report
a
pliable
conjugated
phenylene
nanocage
by
synergistically
merging
flexible
building
blocks.
anisotropic
cage
molecule
contains
branched
chains
capped
calix[6]arene
moiety,
the
delicate
conformational
changes
of
which
endow
with
remarkably
deformable
cavity.
When
complexing
fullerene
guests,
showcases
excellent
guest‐adaptivity,
its
cavity
volume
capable
swelling
much
85
%.
ChemPlusChem,
Journal Year:
2024,
Volume and Issue:
89(11)
Published: July 18, 2024
Abstract
We
herein
report
the
facile
synthesis
of
two
helical
carbon
nanorings
with
small
ring
sizes,
cyclo[6]paraphenylene‐1,5‐naphthylene
(
[6]CPPNap
1,5
),
and
cyclo[6]paraphenylene‐1,5‐anthrylene
[6]CPPAn
).
The
structures
were
determined
by
NMR
HR‐MS.
X‐ray
single‐crystal
data
was
also
achieved.
strain
energy
racemization
processes
investigated
DFT
calculations.
reduced
sizes
result
in
increased
elevated
barriers.
photophysical
properties
studied
UV‐Vis
absorption,
fluorescence
emission,
time‐resolved
decay.
