Journal of Polymer Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 18, 2024
Abstract
The
C1
polymerization
of
substituted
diazomethanes,
including
diazoethane
and
2,2,2‐trifluoromethyl
diazomethane,
are
reported.
N
‐heterocyclic
carbene
copper
complexes
were
employed
as
catalysts
for
the
reactions
afforded
corresponding
persubstituted
polymers
containing
methyl
or
trifluoromethyl
units
along
backbones
polymer
products.
characterized
using
size
exclusion
chromatography,
a
variety
spectroscopic
thermal
techniques,
contact
angle
measurements.
Polymers
prepared
methodology
described
herein
more
hydrophobic
than
related
that
obtained
standard
C2
method
fluorinated
determined
to
be
their
hydrogenated
analogues.
relationship
between
fluorine
content
wettability
was
quantified.
Macromolecules,
Год журнала:
2023,
Номер
56(12), С. 4639 - 4648
Опубликована: Июнь 12, 2023
Diazoacetates
with
a
variety
of
alkyl
groups
as
an
ester
substituent
were
prepared
and
polymerized
by
Pd-based
initiating
systems
to
afford
atactic
poly(alkoxycarbonylmethylene)s
(PACMs),
the
effect
side-chain
structure
on
thermophysical
properties
[melting
point
(Tm)
glass
transition
temperature
(Tg)]
was
investigated
differential
scanning
calorimetry
analyses.
The
use
series
linear
two-way-branched
side
chains
various
chain
lengths
not
so
effective
for
raising
Tm
PACMs.
On
other
hand,
incorporation
amide-linkage
in
middle
is
quite
because
hydrogen-bonding
interaction
among
amide-linkages
chains,
where
spacer
length
between
ester-
crucial
Tm.
highest
around
130
°C
attained
C4
outer
C7
C9.
Polymer Chemistry,
Год журнала:
2024,
Номер
15(11), С. 1077 - 1084
Опубликована: Янв. 1, 2024
SalAld/Pd(tfa)
2
initiating
systems
have
been
revealed
to
be
effective
for
C1
polymerization
of
diazoacetate,
yielding
moderately
syndiotactic
polymers
with
high
M
n
in
moderate
yield.
Acta Chimica Sinica,
Год журнала:
2023,
Номер
81(8), С. 1015 - 1015
Опубликована: Янв. 1, 2023
Based
on
the
well
development
of
diazo
compound
transformations
in
organic
synthesis,
it
is
expected
to
extend
its
applications
field
polymer
synthesis.It
vital
importance
transform
efficient
reactions
compounds
into
new
polymerization
methodology
order
afford
polymers
with
structures
and
functions.Currently,
there
still
great
potential
application
synthesis.This
review
highlights
recent
advancements
synthesis
chemistry
compounds,
including
chain-growth
polymerization,
step-growth
end-group
functionalization
post-polymerization
modification.Transition-metal-catalyzed
diazoacetates
constructs
C-C
main
chain
from
one
carbon
unit.Through
catalytic
diazoacetate
high
molecular
weight
polymers,
stereocontrol
living/controlled
can
be
realized
successively.The
stepwise
originated
their
conversions.The
insertion
reaction
O-H
N-H
bonds
extended
polyethers,
polyesters
polyamines
that
are
not
easily
accessible
through
other
synthetic
methods,
while
cross-coupling
via
metal
carbene
insertion-migration
mechanism
realize
novel
structures.Diazoacetates
diazomalonates
employed
regulate
terminal
synthesized
metal-catalyzed
vinyl
addition
or
ring-opening
metathesis
olefins,
successively
end-capped
by
carbene.The
modifications
based
applied
introduction
polar
functional
groups
polyolefin.Compared
copolymerization
strategy
avoids
depressed
reactivity
varied
monomers,
applicable
a
broad
scope
groups.The
thermal
mechanical
properties
improved
this
method.Finally,
future
challenges
expanding
approaches
prospected
review.
Macromolecular Chemistry and Physics,
Год журнала:
2023,
Номер
225(5)
Опубликована: Ноя. 13, 2023
Abstract
Syndiotactic
poly(substituted
methylene)s
(
st
‐PMs)
with
alkyloxycarbonyl
side
chains
form
hexagonal
columnar
liquid
crystals
(Col
h
LCs),
wherein
the
main
chain
adopting
either
right‐
or
left‐handed
helices
is
arranged
in
a
2D
lattice.
This
study
investigates
conformation
for
‐PMs
chiral
chains,
designated
as
st‐
P8(3,7Me)‐
f
S
S.
‐P8(3,7Me)‐
polymers
possess
3,7‐dimethyloctyloxycarbonyl
at
different
S‐enantiomeric
fractions,
.
In
an
>
50%,
adopts
one‐handed
helical
along
longer
contour
increasing
The
influences
crystallinity
of
polymers.
Chiral
crystallize
Col
LCs
upon
cooling.
crystallite
size,
melting
temperature,
and
fusion
enthalpy
increase
Racemic
‐P8(3,7Me)‐50S
does
not
crystallize.
Polymer Chemistry,
Год журнала:
2022,
Номер
13(46), С. 6369 - 6376
Опубликована: Янв. 1, 2022
Polycondensation
of
a
bis(diazocarbonyl)
compound
and
diaminotriphenylamine
derivatization
via
Ru-catalyzed
N–H
insertion
to
afford
electroactive
polyamine.
