Abstract
Presponsive
smart
organic
crystalline
materials
(SOCMs)
have
emerged
as
an
attractive
research
topic
because
of
their
many
advantages,
such
well-defined
structures,
high
structural
order,
and
the
resulting
fast
response
speeds,
well
energy
conversion
efficiency
remarkable
dynamic
optical/electronic
changes
or
mechanical
responses.
In
this
review,
we
discuss
recent
developments
in
SOCMs
based
on
topochemistry
beyond
coordination
compounds,
which
include
[2
+
2]
[4
4]
photocycloaddition
anthracene
olefin
derivatives
1,
4-addition-polymerization
diacetylenes.
The
detailed
design
principles
mechanisms
associated
with
behavior,
photoresponsive
physical
chemical
properties
(i.e.,
photochromism,
photo
fluorochromism,
photodeformation),
structure–property
relationships
are
discussed,
along
advanced
applications
exciting
fields
intelligent
microrobots,
encryption,
sensors,
photoactuators,
data
storage,
displays.
Finally,
summarize
current
major
challenges
future
opportunities
field.
We
expect
that
review
will
inspire
more
innovative
into
development
crystal
fast,
accurate,
reversible
responses,
promote
further
devices.
European Journal of Chemistry,
Год журнала:
2024,
Номер
15(2), С. 87 - 92
Опубликована: Июнь 30, 2024
The
UV
absorbance
spectrum
of
the
important
chromophore
diphenylacetylene
(tolan)
is
investigated
by
Synchrotron
Radiation
Linear
Dichroism
(SRLD)
spectroscopy
using
stretched
polyethylene
as
an
anisotropic
solvent.
investigation
covers
range
58,000-28,000
cm–1
(172-360
nm).
observed
linear
dichroism
provides
information
on
transition
moment
directions
four
main
bands
A,
B,
C,
and
D
at
33,300,
44,400,
51,000,
57,000
cm-1
(300,
225,
196,
175
experimental
wavenumbers,
intensities,
polarization
are
compared
with
results
quantum
chemical
calculations
semiempirical
all-valence-electrons
method
Combination
Orthogonalized
Atomic
Orbitals
(LCOAO)
Time-Dependent
Density
Functional
Theory
(TD-DFT)
functional
CAM-B3LYP.
Magnetic
Circular
(MCD)
B-terms
predicted
LCOAO
suggest
that
a
number
optically
weak
transitions
may
be
MCD
spectroscopy.
Developing
facile
and
efficient
chemical
upgrading
strategies
to
convert
commercial
engineering
polymeric
materials
into
valuable
products
remains
challenging.
Polyoxymethylene
(POM)
is
a
widely
used
thermoplastic,
but
for
its
reuse
after
disposal
are
still
rare.
Here,
we
demonstrate
"from
poly(A)
poly(A-alt-B)"
strategy
one-step
upcycling
of
POM
polyesters
using
the
bioderived
glutaric
anhydride
(GA)
as
feedstock.
The
upgrade
process
undergoes
cascade
mechanism:
first
depolymerized
formaldehyde
that
then
in
situ
alternately
copolymerized
with
GA.
copolymerization
step
shifts
equilibrium
"POM
⇌
formaldehyde"
right,
leading
complete
conversion
>90%
yields
polyester
product.
method
uses
low-cost
inorganic
acids
catalyst
performed
at
industrially
advantageous
reaction
temperature
100
°C.
obtained
possess
alternating
sequences,
low
molecular
weights
(∼3
kDa),
glass-transition
temperatures
(∼−30
°C),
good
liquidity
room
temperature,
highly
reactive
carboxyl
terminals,
application
prospects
macromolecular
precursors.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 18, 2024
Abstract
Recycling
of
real
waste
plastics
with
diverse
composition
is
extremely
difficult.
Herein,
an
eco‐friendly
and
easy‐to‐operate
strategy
demonstrated
to
facilitate
the
recycling
plastic
composites
mixtures
by
using
only
water.
An
aqu‐thermoplastic
bioplastic
(CPp‐TA)
constructed
switchable
water
solubility
excellent
thermoplastic
property
from
natural
cellulose.
CPp‐TA
consisted
cellulose
main
chain
(C)
two
functional
groups,
internal‐plasticizing
group
(Pp)
(TA).
It
not
has
outstanding
thermo‐plastic
formability,
resistance,
mechanical
satisfy
daily
needs,
but
also
can
be
easily
recycled
switching
water‐soluble
state.
processed
into
various
high‐performance
parts,
fibers,
heat‐sealing
packaging,
transparent
cups,
paper‐plastic
composites,
aluminum‐plastic
conventional
processing
methods.
The
obtained
CPp‐TA/Al/paper
composite
exhibits
better
barrier
performance
than
famous
Tetra
Pak
a
complex
process,
separated
CPp‐TA,
Al
foil,
paper
basic
aqueous
solution
trigger
CPp‐TA.
Similarly,
effectively
mixtures.
recovery
yield
achieves
100%.
revolutionary
materials
water‐recycling
markedly
reduce
difficulty
intricate
promote
sustainable
development.
Abstract
Presponsive
smart
organic
crystalline
materials
(SOCMs)
have
emerged
as
an
attractive
research
topic
because
of
their
many
advantages,
such
well-defined
structures,
high
structural
order,
and
the
resulting
fast
response
speeds,
well
energy
conversion
efficiency
remarkable
dynamic
optical/electronic
changes
or
mechanical
responses.
In
this
review,
we
discuss
recent
developments
in
SOCMs
based
on
topochemistry
beyond
coordination
compounds,
which
include
[2
+
2]
[4
4]
photocycloaddition
anthracene
olefin
derivatives
1,
4-addition-polymerization
diacetylenes.
The
detailed
design
principles
mechanisms
associated
with
behavior,
photoresponsive
physical
chemical
properties
(i.e.,
photochromism,
photo
fluorochromism,
photodeformation),
structure–property
relationships
are
discussed,
along
advanced
applications
exciting
fields
intelligent
microrobots,
encryption,
sensors,
photoactuators,
data
storage,
displays.
Finally,
summarize
current
major
challenges
future
opportunities
field.
We
expect
that
review
will
inspire
more
innovative
into
development
crystal
fast,
accurate,
reversible
responses,
promote
further
devices.
