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
Two
series
of
nitro-substituted
fused
triazole
were
prepared.
All
compounds
have
been
fully
characterized
by
IR,
elemental
analysis,
1H
and
13C
NMR
DSC.
Neutral
a1
b1
exhibit
quite
different
thermostabilities
this
trend
has
extended
to
their
energetic
salts,
which
could
be
explained
the
NBO
analysis
hydrogen
bonds
based
on
single-crystal
parameters.
The
structures
salts
a2,
a3
b3
also
confirmed
X-ray
diffraction.
NCI
Hirshfeld
surfaces
performed
further
understand
relationship
between
properties
regioisomeric
structures.
new
show
good
densities
varying
within
1.66-1.83
g
cm-3,
detonation
velocities
7688-8461
m
s-1
pressures
22.1-26.7
Gpa,
are
insensitive
friction
impact.
High
thermal
stability
(Td
=
274
°C)
combined
with
velocity
(vD
8238
s-1)
highlight
promising
application
for
salt
b2
as
a
high-energy
compound.
CrystEngComm,
Год журнала:
2023,
Номер
26(2), С. 143 - 152
Опубликована: Ноя. 21, 2023
New
energetic
salts
based
on
N
-methylene-C
bridged
tetrazole
and
triazole
were
developed
as
safe
primary
explosives,
which
are
free
from
heavy
metal
ions
azide
groups
show
high
energy
property,
good
stability,
reliable
ignition
ability.
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
