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,
Journal Year:
2024,
Volume and Issue:
12(17), P. 10050 - 10058
Published: Jan. 1, 2024
A
zwitterionic
fused-ring
based
energetic
material
(ZDPT)
was
prepared.
ZDPT
has
excellent
thermal
stability
(
T
d
=
347
°C
)
and
great
detonation
velocity
D
8390
m
s
−1
),
which
endow
with
potential
as
a
heat-resistant
material.
Journal of Materials Chemistry A,
Journal Year:
2023,
Volume and Issue:
11(47), P. 25992 - 25999
Published: Jan. 1, 2023
An
efficient
strategy
of
constructing
nitrogen-rich
1,2,4-triazole
bridged
compounds
via
silver-catalyzed
one-pot
cycloaddition
has
been
developed,
which
resulted
in
the
formation
promising
heat-resistant
materials.
CrystEngComm,
Journal Year:
2023,
Volume and Issue:
25(21), P. 3181 - 3188
Published: Jan. 1, 2023
The
energetic
inner
salts
of
π–π
stacking
and
their
ionic
show
high
thermal
stability
(
T
d
≥
238
°C),
insensitivity
(FS
360
N,
IS
40
J),
good
detonation
performance
D
7757
m
s
−1
,
P
24.1
GPa).
Energetic Materials Frontiers,
Journal Year:
2024,
Volume and Issue:
5(1), P. 1 - 7
Published: Feb. 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.
Defence Technology,
Journal Year:
2022,
Volume and Issue:
27, P. 193 - 199
Published: Sept. 16, 2022
In
light
of
the
low
yields
and
complex
reaction
routes
some
well-known
5,5-fused
5,6-fused
bicyclic
compounds,
a
series
5,7-fused
imidazole-diazepine
compounds
were
developed
with
high
by
only
two
efficient
steps.
Significantly,
seven-membered
heterocyclic
ring
has
stable
energetic
skeleton
multiple
modifiable
sites.
However,
rarely
reported
in
area
materials.
Three
neutral
1,
2
4
synthesized
this
work.
To
improve
detonation
performances
corresponding
perchlorate
1a
2a
further
developed.
The
physicochemical
all
newly
experimentally
determined.
All
prepared
exhibit
decomposition
temperatures
(Td:
243.8–336
°C)
mechanical
sensitivities
(IS:
>15
J,
FS:
>280
N).
Among
them,
velocities
(Dv
=
7651
m/s)
7600
are
comparable
to
that
typical
heat-resistant
material
HNS
7612
m/s).
Meanwhile,
temperature
(Td
336
°C;
IS
32
J;
FS
>
353
N)
superior
318
5
250
Hence,
thermostability,
adjustable
performance
have
clear
tendency
open
up
new
space
for
development
Crystal Growth & Design,
Journal Year:
2022,
Volume and Issue:
22(7), P. 4221 - 4227
Published: June 9, 2022
Two
fused
nitrogen-rich
energetic
compounds
3-nitro-[1,2,4]
triazolo
[5,1-c]
[1,2,4]
triazine-4-amine
(2)
and
N-(7-amino-[1,2,4]
[1,5-a]
[1,3,5]
triazine-5-yl)nitramide
(4)
were
prepared
by
the
simple
straightforward
synthesis
from
commercially
available
3-amino-1,2,4-triazole.
The
derivatives
5–8
4
to
reduce
acidity
improve
detonation
performance.
All
fully
characterized
elemental,
1H
13C
NMR,
infrared
analysis.
molecular
structures
of
1·3/2H2O,
2,
3·1/2H2O,
4,
5·4/3H2O
further
determined
single-crystal
X-ray
diffraction.
thermal
stability
sensitivity
toward
external
stimulus
for
these
evaluated
differential
scanning
calorimetry,
friction
(FS),
impact
(IS).
performance
was
predicted
using
EXPLO5
(version
6.02)
based
on
measured
density
at
298
K
calculated
heats
formation
(Gaussian
09).
According
results,
all
newly
synthesized
show
high
stabilities
(>200
°C)
low
sensitivities
towards
(IS
>
40
J
FS
360
N).
Among
compounds,
compound
8
with
(Dv
=
8784
m
s–1
P
30.1
GPa)
could
be
used
as
a
high-energy
low-sensitivity
explosive.
