ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 24, 2024
Carbonyl
azides
are
important
precursors
to
isocyanates
and
used
as
energetic
compounds.
However,
the
further
development
of
these
compounds
is
limited
by
their
inherently
poor
stability.
In
this
study,
we
present
a
new
family
carbonyl
azides,
5-nitro-1H-1,2,4-triazol-3-yl-carbamoyl-azide
(NTCA),
which
was
synthesized
through
in
situ
oxidation
cleavage
amino-tetrazole.
Compared
with
its
precursor
(nitrocarbamoyl
azide,
HNCA),
X-ray
data
quantum
calculations
indicate
that
NTCA
has
much
stronger
conjugation
(dihedral
angle
decreased
from
13.39°
1.35°)
more
H-bonds
(increase
2
7
pairs).
As
result,
exhibits
highest
thermal
stability
(decomposition
temperature
212
°C)
density
(1.820
g
cm
Chemical Communications,
Год журнала:
2024,
Номер
60(12), С. 1646 - 1649
Опубликована: Янв. 1, 2024
A
series
of
nitrogen-rich
fused
energetic
materials
were
synthesized
from
commercially
available
inexpensive
starting
and
fully
characterized
using
1
H
13
C
NMR,
IR
spectroscopy,
elemental
analysis,
DSC.
Nitro
groups
have
played
a
central
and
decisive
role
in
the
development
of
most
powerful
known
energetic
materials.
Highly
nitrated
compounds
are
potential
oxidizing
agents,
which
could
replace
environmentally
hazardous
used
materials
such
as
ammonium
perchlorate.
The
scarcity
azole
with
large
number
nitro
is
likely
due
to
their
inherent
thermal
instability
limited
ring
sites
available
for
bond
formation.
Now,
formation
first
molecule
bonded
seven
groups,
4-nitro-3,5-bis(trinitromethyl)-1H-pyrazole
(4),
by
stepwise
nitration
3,5-dimethyl-1H-pyrazole
reported.
Compound
4
exhibits
exceptional
physicochemical
properties
positive
oxygen
balance
(OBCO2
=
13.62%)
an
extremely
high
calculated
density
(2.04
g
cm-3
at
100
K).
This
impressively
C,
H,
N,
O
compound.
work
giant
step
forward
highly
dense
azoles
will
accelerate
further
exploration
this
challenging
field.
Organic Letters,
Год журнала:
2023,
Номер
25(48), С. 8606 - 8610
Опубликована: Ноя. 29, 2023
In
this
work,
we
have
synthesized
3,5-dihydrazinyl-4-nitro-1H-pyrazole
(2),
9-nitro-1H-pyrazolo[3,2-c:5,1-c']bis([1,2,4]triazole)-3,6-diamine
(3),
and
N-N-bonded
N,N'-{[4,4'-bi(1,2,4-triazole)]-3,3'-diyl}dinitramide
(5)
its
stable
nitrogen-rich
energetic
salts
in
one
two
steps
quantitative
yields
from
commercially
available
inexpensive
starting
material
4,6-dichloro-5-nitropyrimidine
(1).
Along
with
characterization
via
nuclear
magnetic
resonance,
infrared,
differential
scanning
calorimetry,
elemental
analysis,
the
structures
of
2
4-8
were
confirmed
by
single-crystal
X-ray
diffraction.
Interestingly,
5-8
show
excellent
thermal
stability
(242,
221,
250,
242
°C,
respectively)
compared
to
that
RDX
(210
°C).
Detonation
velocities
2,
4,
6,
7
range
8992
9069
m
s-1,
which
are
better
than
(8878
s-1)
close
HMX
(9221
s-1).
All
these
compounds
insensitive
impact
(10-35
J)
friction
(360
N)
sensitivity.
These
performances,
stabilities,
synthetic
feasibilities
make
promising
candidates
as
secondary
explosives
potential
replacements
for
presently
used
benchmark
HMX.
Chemical Communications,
Год журнала:
2023,
Номер
59(75), С. 11276 - 11279
Опубликована: Янв. 1, 2023
Little
is
known
about
trinitromethyl
nitrotriazole
(TNMNT)
since
the
crystal
structure,
density,
energetic
performance,
and
thermal
properties
have
not
been
determined.
A
detailed
characterization
of
TNMNT
its
hydrazinium
potassium
salts
their
potential
as
solid
propellants
oxidizers
has
established.
exhibits
a
high
density
(1.96
g
cm-3)
positive
enthalpy
formation
(ΔHf
=
+84.79
kJ
mol-1).
illustrate
excellent
detonation
(P
34.24
to
36.22
GPa,
D
8899
9031
ms-1).
salt
exhibit
outstanding
propulsive
(Isp
247.28
271.19
s),
these
are
superior
AP
156.63
s)
ADN
202.14
s).
The
results
suggest
opening
door
utilizing
in
rocket
propulsion.
Inorganic Chemistry,
Год журнала:
2024,
Номер
63(32), С. 15144 - 15153
Опубликована: Авг. 2, 2024
Two
novel
nitrogen-rich
green
energetic
compounds
were
synthesized
for
the
first
time
from
readily
available
and
cost-effective
pyrazine
starting
materials.
All
newly
molecules
comprehensively
characterized,
including
infrared
spectroscopy,
nuclear
magnetic
resonance,
elemental
analysis,
mass
spectrometry,
thermogravimetric
analysis-differential
scanning
calorimetry.
have
additionally
been
validated
by
single-crystal
X-ray
diffraction
analysis.
The
physicochemical
properties
of
Crystal Growth & Design,
Год журнала:
2025,
Номер
25(5), С. 1355 - 1363
Опубликована: Фев. 17, 2025
High-energy-density
materials
(HEDMs)
have
made
significant
progress
in
defense
and
space
applications,
but
they
still
confront
the
challenges
of
unsatisfactory
safety,
sensitivity,
chemical
applicability.
In
this
work,
a
strategy
to
synthesize
symmetric
energetic
by
introducing
flexible
chains
(−CH2–
or
−CH2CH2−)
is
reported
based
on
5-azido-3-nitro-1H-1,2,4-triazole
1.
N,N′-Methylene
bridged
compound
2
N,N′-ethylene
3
are
successfully
obtained
through
one-step
synthesis
with
high
yield.
The
introduction
significantly
reduced
mechanical
sensitivity
two
compounds.
This
change
can
be
attributed
synergistic
effects
several
factors,
including
formation
hydrogen
bonds,
oxygen
balance,
variations
ESP
molecular
surface.
As
result,
(IS
=
15
J,
FS
360
N)
>
40
exhibit
lower
compared
monocyclic
functional
integrated
1
5
42
N).
detonation
velocities
compounds
8439
7979
m·s–1,
respectively.
