Sciencemadness Discussion Board

energetic ionic liquids?

zjgbit - 24-7-2006 at 09:12

Who would like give some news about " energetic ionic liquids"?

franklyn - 24-7-2006 at 09:57

Ammonium Nitrate in solution ?

.

Swany - 24-7-2006 at 13:18

Ionic? Mn2O7 solution would be fairly ionic, no?

neutrino - 24-7-2006 at 13:46

At higher oxidation states, metals tend to form bonds with more covalent character. I would expect that molecule to be covalent, not ionic.

12AX7 - 24-7-2006 at 14:00

He means Mn2O7 + H2O <--> 2H+ + 2MnO4-.

Oh, and how about NH4+ + ClO3-.

Tim

[Edited on 7-24-2006 by 12AX7]

Jome - 25-7-2006 at 13:51

http://en.wikipedia.org/wiki/Ionic_liquid

Is this what you're asking about? Intresting stuff.

chemoleo - 25-7-2006 at 18:21

Yes, ionic liquids have only recently sprung to attention, I think there was recently a high profile publication in Nature, by some german group, even though they were discovered decades ago.

They are rare though, simply because the ionic character makes these liquids non-volatile due to electrostatic forces. Solutions of ionic salts, as mentioned above, do *not* fall into this category. The isolated ionic salts are liquid, and can be distilled like any other organic compound, which is part of its definition from what I remember from this article.
Energetic ones... well look at the wiki entry - one could attach a ClO4/NO3 anion, or include NO2 groups on the cation. Not easy for sure.

nitro-genes - 26-7-2006 at 03:24

Interesting stuff... Oxygen balanced energetic ionic liquids may be hard to make, since the cation has to be considerably larger than the anion. But their solvent properties might allow them to be mixed with oxidizers like ammonium perchlorate or ammonium nitrate. Simple examples would be ethylammonium nitrate/perchlorate with ammonium nitrate/perchlorate. The addition of another ionic compound may even form eutectics with an even lower melting point...

Their potential use in meltcast compositions is also promising. In the article below, a lot of ionic liquids are given that have sufficiently low melting temperatures to be cast alone or in combination with other high explosives, analogous to cyclotol or octol. With a big plus being the very low sensivity and high stability of these compounds. Surprisingly, some of the energetic ionic liquids mentioned have detonation pressures in the same range as RDX or PETN at crystal density...:o
Hygroscopicity must be a mayor problem with a lot of these compounds though, just like the OTC availability of triazole...:(

[Edited on 26-7-2006 by nitro-genes]

Attachment: Energetic ionic liquid meltcasts.pdf (910kB)
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franklyn - 28-7-2006 at 10:40

Quote:
Originally posted by chemoleo
Yes, ionic liquids have only recently sprung to attention,
They are rare though,
Solutions of ionic salts, as mentioned above, do *not* fall into this category.
Energetic ones... well look at the wiki entry - one could attach a ClO4/NO3 anion, or include NO2 groups on the cation. Not easy for sure.

Oh I see, proton base activity on the same molecule. Would an
amino acid count as an example of this ? For example, substituting
the carboxyl acid functional group of glycine with a nitroamine
group , H2N.CH2.NHNO2

.

DeAdFX - 28-7-2006 at 16:52

Quote:
Originally posted by franklyn
Quote:
Originally posted by chemoleo
Yes, ionic liquids have only recently sprung to attention,
They are rare though,
Solutions of ionic salts, as mentioned above, do *not* fall into this category.
Energetic ones... well look at the wiki entry - one could attach a ClO4/NO3 anion, or include NO2 groups on the cation. Not easy for sure.

Oh I see, proton base activity on the same molecule. Would an
amino acid count as an example of this ? For example, substituting
the carboxyl acid functional group of glycine with a nitroamine
group , H2N.CH2.NHNO2

.


Already been done... Look up the explosive MEDINA(Methylene Dinitramine).

franklyn - 30-7-2006 at 00:00

Quote:
Originally posted by DeAdFX
Quote:
Originally posted by franklyn
Oh I see, proton base activity on the same molecule. Would an
amino acid count as an example of this ? For example, substituting
the carboxyl acid functional group of glycine with a nitroamine
group , H2N.CH2.NHNO2

Already been done... Look up the explosive MEDINA(Methylene Dinitramine).

Not sure how MEDINA relates to this,

(+) H NH2 - CH2 - N - N=O
. . . . . . . . . . . . . . . . . .|
. . . . . . . . . . . . . . . . . O ( - )
.

[Edited on 30-7-2006 by franklyn]

MiS - 1-8-2006 at 20:34

This may interest you:

http://www.rsc.org/publishing/journals/CC/article.asp?doi=b6...