The
construction
of
heat-resistant
fused
heterocyclic
compounds
are
increasingly
fascinating
in
the
field
energetic
materials
not
only
because
it
usually
behaves
high
density
but
also
shows
excellent
energy,
thermal
stability
and
low
sensitivity.
In
present
study,
a
novel
imidazo[1,2-b]pyridazine
ring-based
explosive,
3,7-dinitroimidazo[1,2-b]pyridazine-6,8-diamine
(4)
was
synthesized
by
three-step
facile
method.
Compound
4
has
(1.856
g•cm-3)
sensitivity
(IS
=40
J,
FS
=
350
N).
Meanwhile,
good
decomposition
temperature
324°C,
which
is
superior
to
conventional
heat
resistant
explosive
HNS
(Td
318°C).
addition,
detonation
performance
compound
(D=8336
m•s-1,
P=27.25
GPa)
significantly
better
than
both
TNT
(D=6881
P=19.5
(D=7612
P=24.3GPa).
Theoretical
analysis
that
effect
“NH2-NO2-NH2”
intramolecular
hydrogen
bonding
interaction
may
be
main
reason
for
causing
heat-resistance
imidazolopyridazine
materials.
results
suggest
promising
building
block
candidate
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(16), С. 9546 - 9551
Опубликована: Янв. 1, 2024
This
study
highlights
for
the
first
time
impact
of
positional
isomerism
on
chemical
reactivity
which
involves
a
domino
reaction,
salt
formation,
cyclization,
and
nucleophilic
substitution.
The Journal of Physical Chemistry C,
Год журнала:
2023,
Номер
127(18), С. 8887 - 8893
Опубликована: Апрель 26, 2023
For
an
energetic
material
with
a
definite
composition,
the
substituent
position
is
most
crucial
factor
to
influence
its
physicochemical
properties.
Thus,
it
becoming
increasingly
important
understand
impact
of
positional
isomerism
on
multidimensional
properties
differences.
Herein,
we
reported
two
new
potential
melt-castable
molecules,
pair
isomers
(4-MMDNP
and
5-MMDNP).
These
explosives
exhibit
obviously
different
properties,
including
densities
(Δρ
=
0.03
g
cm–3),
melting
point
(ΔTm
47.2
°C),
decomposition
temperature
(ΔTd
27.3
stability
(IS
20
J,
FS
160
N
vs
IS
10
40
N),
etc.,
even
though
they
share
similar
compositions
structures.
Simultaneously,
by
analyzing
crystal
packing,
intermolecular
interactions,
monomolecular
parameters,
were
able
uncover
roots
property
Altogether,
our
results
provide
comprehensive
molecular
level
insight
into
effect
isomerism,
which
may
be
useful
for
design.
Inorganic Chemistry,
Год журнала:
2023,
Номер
62(42), С. 17199 - 17206
Опубликована: Окт. 12, 2023
Energetic
materials
have
been
widely
applied
in
civil
and
military
fields,
whose
thermostability
is
a
key
indicator
to
evaluate
their
safety
levels
under
severe
conditions.
Herein,
two
novel
energetic
metal-organic
frameworks
(EMOFs),
namely,
4
6,
were
experimentally
obtained
comprehensively
characterized.
The
EMOFs
both
possess
unique
three-dimensional
(3D)
coordination
structures.
With
high
crystal
density
of
2.184
g·cm-3,
EMOF
exhibits
outstandingly
superior
(onset:
290
°C;
peak:
303
°C),
while
6
features
onset
peak
decomposition
temperatures
220
230
°C.
calculated
parameters
are
as
follows:
detonation
velocity:
8731
m·s-1
8294
m·s-1;
pressure:
26.5
26.4
GPa.
Compared
energy,
excellent
thermostability,
low
mechanical
sensitivities,
which
should
be
partly
attributed
more
plentiful
interactions.
More
bonds
conducive
strengthening
the
framework,
needs
much
energy
collapse,
thereby
maintaining
higher
thermal
stability.
above
favorable
characteristics
not
only
indicate
has
promising
future
applications
thermostable
explosive
but
also
provide
an
effective
feasible
strategy
for
developing
heat-resistant
via
reinforced
frame
structures
EMOFs.
Crystal Growth & Design,
Год журнала:
2023,
Номер
23(7), С. 4970 - 4978
Опубликована: Июнь 2, 2023
In
this
work,
a
combined
strategy
of
bridging
two
tetrazolo[1,5-b]pyridazine
rings
and
introducing
intramolecular
hydrogen
bonds
(N–H···O)
with
hydrazo
group
was
developed
to
construct
new
high-energy
heat-resistant
energetic
compound
named
6,6′-hydrazo-bis(8-amino-7-nitrotetrazolo[1,5-b]pyridazine)
(1).
Its
dehydrogenated
derivative
6,6′-azo-bis(8-amino-7-nitrotetrazolo[1,5-b]pyridazine)
(2),
which
had
fewer
(N–H···O),
also
synthesized
for
comparison.
Compounds
1
2
were
characterized
by
high-resolution
mass
spectrometry,
nuclear
magnetic
resonance,
single-crystal
X-ray
diffraction,
infrared
spectroscopy,
elemental
analysis.
Their
properties,
such
as
densities
(ρ:
1.87
g·cm–3
1,
1.77
2),
heat
formation
values
(ΔHf:
1079
kJ·mol–1
1235
detonation
velocities
(Dv:
9064
m·s–1
8429
pressures
(P:
35.2
GPa
27.8
decomposition
temperatures
(Td:
292
°C
260
impact
sensitivities
(IS:
16
J
4
friction
(FS:
>360
N
160
tested.
These
results
suggest
that
is
promising
thermally
stable
material.
Dalton Transactions,
Год журнала:
2024,
Номер
53(30), С. 12641 - 12648
Опубликована: Янв. 1, 2024
An
advanced
tetracyclic
heat-resistant
explosive
compound
3
with
high
thermal
stability
and
good
detonation
performance
was
prepared
by
introducing
a
high-energy
bis(4-nitropyrazole)
bridge
between
two
4
H
-1,2,4-triazole-3,4-diamine
frameworks.
The Journal of Organic Chemistry,
Год журнала:
2023,
Номер
88(13), С. 8929 - 8936
Опубликована: Май 30, 2023
In
this
work,
a
fused-ring
[1,2,5]oxadiazolo[3,4-b]pyridine
1-oxide
framework
with
multiple
modifiable
sites
was
utilized
to
develop
novel
energetic
materials
hydrogen
bonds.
The
prepared
were
characterized,
and
their
properties
extensively
investigated.
Among
those
studied,
compound
3
exhibited
high
densities
of
1.925
g
cm–3
at
295
K
1.964
170
K,
detonation
performances
(Dv:
8793
m
s–1
P:
32.8
GPa),
low
sensitivities
(IS:
20
J,
FS:
288
N),
good
thermal
stability
(Td:
223
°C).
N-Oxide
4
had
higher-energy
explosive
8854
34.4
GPa)
15
J
240
N).
Compound
7
enthalpy
group
(tetrazole)
determined
as
high-energy
8851
s–1,
32.4
GPa).
Notably,
the
compounds
3,
4,
similar
RDX
8801
33.6
results
indicated
that
potential
low-sensitivity
materials.
Propellants Explosives Pyrotechnics,
Год журнала:
2023,
Номер
48(8)
Опубликована: Июль 28, 2023
Abstract
Composite
microspheres
of
TKX‐55
and
fluororubber
were
prepared
by
microfluidic
method.
The
binding
energy
mechanical
properties
calculated
Materials
studio,
F
2604
was
determined
as
the
binder.
particle
size
composite
is
between
100
200
μm,
bulk
density,
impact
sensitivity
theoretical
detonation
velocity
have
made
considerable
progress.
combustion
performance
characterized.
It
found
that
addition
could
inhibit
improve
safety
composite.
has
potential
to
be
used
main
explosive
component
new
heat‐resistant
PBX.
Energetic Materials Frontiers,
Год журнала:
2024,
Номер
5(1), С. 1 - 7
Опубликована: Фев. 7, 2024
Constructing
heat-resistant
fused
heterocyclic
compounds
is
increasingly
fascinating
in
the
field
of
energetic
materials
due
to
their
excellent
energy,
high
thermal
stability,
and
low
sensitivity,
as
well
density
general.
This
study
synthesized
a
novel
explosive
based
on
imidazo
[1,2-b]pyridazine
ring,3,7-dinitroimidazo
[1,2-b]pyridazine-6,8-diamine
(5),using
three-step
facile
method.
compound
exhibited
(1.856
g
cm−3)
mechanical
sensitivities
(IS
=
40
J,
FS
350
N).
Meanwhile,
it
displayed
higher
decomposition
temperature
324
°C
compared
conventional
HNS
(Td
318
°C).
In
addition,
demonstrated
significantly
detonation
performance
(D
8336
m
s−1,
p
27.25
GPa)
than
both
TNT
6881
19.5
7612
24.3
GPa).
Theoretical
analysis
shows
that
intramolecular
hydrogen
bonding
interactions
NH2–NO2–NH2
might
be
main
reason
for
heat
resistance
ring.
The
results
this
suggest
5
promising
building
block
candidate
materials.
