Chinese Journal of Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 24, 2024
Comprehensive
Summary
Post‐polymerization
modification
provides
an
important
approach
to
tuning
the
material
properties
of
obtained
polymers.
In
this
work,
we
demonstrated
a
rational
design
novel
vinylcyclopropane
monomer
bearing
pendant
N
‐hydroxylphthalimide
redox
ester,
and
explored
its
radical
ring‐opening
polymerization
behavior
under
visible‐light
conditions.
Photochemical
decarboxylation
resulted
polymer
provided
unique
access
poly(vinylcyclopropane)
single
ester
group
in
each
repeating
unit.
This
decarboxylative
has
greatly
reshaped
thermal
mechanical
properties,
converting
glassy
into
soft,
ductile,
rubber‐like
material.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(48)
Опубликована: Сен. 10, 2024
Abstract
Kunststoffe
sind
in
unserem
Alltag
allgegenwärtig,
und
die
Akkumulation
von
Kunststoffabfällen
unserer
Umwelt
stellt
ein
großes
gesellschaftliches
Problem
dar.
Daher
Methoden
für
das
Recycling
im
Hinblick
auf
eine
künftige
Kreislaufwirtschaft
hohem
Interesse.
Insbesondere
der
Abbau
Polymeren
nach
Nutzung
durch
Verbraucher
hin
zu
wertschöpfenden
kleinen
Molekülen
nachhaltige
Strategie
Kohlenstoff‐Kreislaufwirtschaft
Trotz
jüngster
Fortschritte
ist
chemische
Polymerabbau
wie
vor
weitgehend
Redox‐Reagenzien
beschränkt
oder
geringe
Energieeffizienz
photochemischer
Prozesse
limitiert.
In
dieser
Arbeit
berichten
wir
über
einen
leistungsstarken
eisenkatalysierten
Polystyrolen
mit
Molekulargewicht
Elektrochemie,
um
effizient
monomere
Benzoylprodukte
liefern.
Die
Robustheit
Ferraelektrokatalyse
wurde
den
verschiedenen
realen
Nach‐Gebrauchs‐Kunststoffen,
ebenfalls
Gramm‐Maßstab,
bestätigt.
kathodische
Halbreaktion
Wasserstoffentwicklungsreaktion
(HER)
dargestellt.
Der
skalierbare
elektrolytische
konnte
ausschließlich
Solarenergie
handelsübliches
Solarpanel
betrieben
werden,
was
herausragendes
Potenzial
dezentralisierte,
grüne
Wasserstoffwirtschaft
hinweist.
Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 24, 2024
Abstract
The
quest
for
polymers
that
would
be
at
the
same
time
bio‐based
and
degradable
after
usage,
in
addition
to
offering
chemical
post‐modification
options,
remains
a
daunting
challenge
contemporary
polymer
science.
Despite
advances
chemistry,
attempts
controlling
chain‐growth
polymerization
of
muconate
esters
remain
unexplored.
Here
we
show
dialkyl
muconates
can
rapidly
polymerized
by
organocatalyzed
group
transfer
(O‐GTP).
O‐GTP
is
conducted
completion
room
temperature
toluene
within
few
minutes,
using
1‐ethoxy‐1‐(trimethylsiloxy)‐1,3‐butadiene
(ETSB)
as
initiator
1‐tert‐butyl‐4,4,4‐tris(dimethylamino)‐2,2‐bis[tris(dimethylamino)‐phosphoranylidenamino]‐2
5,4
5
catenadi(phosphazene)
(P
4
‐
t
‐Bu)
catalyst.
Chain
extension
experiments
synthesis
all
muconate‐type
block
copolymers
also
achieved.
Furthermore,
polymuconates
are
amenable
facile
post‐polymerization
modification
reactions.
This
showcased
through
hydrolysis
ester
side
chains
leading
well‐defined
poly(muconic
acid),
epoxidation
C=C
double
bonds
main
chain.
Last
but
not
least,
these
internal
alkene
groups
selectively
cleaved
ozonolysis,
demonstrating
upcyclability
under
oxidative
conditions.
work
demonstrates
constitute
unique
platform
polymers,
easily
modifiable
being
chemically
user
friendly
experimental
Chinese Journal of Chemistry,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 24, 2024
Comprehensive
Summary
Post‐polymerization
modification
provides
an
important
approach
to
tuning
the
material
properties
of
obtained
polymers.
In
this
work,
we
demonstrated
a
rational
design
novel
vinylcyclopropane
monomer
bearing
pendant
N
‐hydroxylphthalimide
redox
ester,
and
explored
its
radical
ring‐opening
polymerization
behavior
under
visible‐light
conditions.
Photochemical
decarboxylation
resulted
polymer
provided
unique
access
poly(vinylcyclopropane)
single
ester
group
in
each
repeating
unit.
This
decarboxylative
has
greatly
reshaped
thermal
mechanical
properties,
converting
glassy
into
soft,
ductile,
rubber‐like
material.
