SupaVillain
Hazard to Others
Posts: 171
Registered: 28-10-2014
Member Is Offline
Mood: No Mood
|
|
Organometallic Reactions
What cheap materials are inert to the following? Could I use plastic? Rubber? Polyurethane based epoxies?
Disilane
dimethylzinc
phosphine
triphenylarsine
trimethylaluminum
trimethylgallium
trimethylindium
an undecided germanium organometallic
i'll have to experiment some, but it would be nice to know what material i can use for the valves. There are some little parts in them that are much
more easily made with things like plastic or rubber, and using epoxies makes things a lot easier too.
Oh.
|
|
|
Boffis
International Hazard
Posts: 1836
Registered: 1-5-2011
Member Is Offline
Mood: No Mood
|
|
glass and polythene
|
|
|
SupaVillain
Hazard to Others
Posts: 171
Registered: 28-10-2014
Member Is Offline
Mood: No Mood
|
|
What about sealants? Like silicone
Oh.
|
|
|
aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
Member Is Offline
|
|
To be honest, using the terms 'cheap' and 'organometallic' sounds like a disaster in progress.
What exactly do you wish to synthesise ?
That would give a better basis for suggesting things.
|
|
|
gdflp
Super Moderator
Posts: 1320
Registered: 14-2-2014
Location: NY, USA
Member Is Offline
Mood: Staring at code
|
|
I have to admit that I agree with aga. Those materials are all pyrophoric, some remarkably so, and quite a few have significant toxicities. In
addition, phosphine is a gas. You will need an inert atmosphere at all times when handling them, and a complete set of Schlenk glassware is going to
be required to handle them safely, in additions to septums and other accessories to move and store them safely. Unfortunately, none of the above are
cheap. If the compound decides to catch fire, none of the materials you proposed are fire resistant, thus your apparatus, or at least parts of it,
will burn and expose the rest of the compound to the atmosphere, compounding your problems. Essentially, you should aim to make as much of your
apparatus as possible glass.
|
|
|
SupaVillain
Hazard to Others
Posts: 171
Registered: 28-10-2014
Member Is Offline
Mood: No Mood
|
|
Doing MOVPE to create solar panels, the multijunction and concentrated kind. It is an atomic layer deposition method, very small amounts of these
chems are used and nitrogen is bubbled through them to push vapors into the very thin and flat reactor, then they leave the reactor into incinerators
or scrubbers or both. I am mostly worried about the triphenylarsine, however, it seems to be one of the least toxic arsenic "precursors" and is far
more easily handled than its alternatives, as it is a solid.
Theyre not so expensive if you make them yourself. Thats also what the semiconductor industry does, they make their own stuff after ordering the
ingredients for these because it is far cheaper than hazmat shipping something that can explode easily and decompose without air conditioning.
i merely mean to use polyethylene type materials for connections and parts of the valves.
Oh.
|
|
|
SupaVillain
Hazard to Others
Posts: 171
Registered: 28-10-2014
Member Is Offline
Mood: No Mood
|
|
The phosphine can be generated by dripping water onto calcium phosphide. If this too oftenly results in fire I'll just have to use another phosphorus
precursor
Oh.
|
|
|
aga
Forum Drunkard
Posts: 7030
Registered: 25-3-2014
Member Is Offline
|
|
Wow ! Looked up what MOVPE means, and that is intense stuff !
(metalorganic vapour phase epitaxy)
Have you had any success yet ? Any photos ?
|
|
|
SupaVillain
Hazard to Others
Posts: 171
Registered: 28-10-2014
Member Is Offline
Mood: No Mood
|
|
Not yet, I need to know some kind of inert bonding material or adhesive and an inert lubricant for the solenoid valves, that's about the last thing I
need to know besides the synthesis for a soluble polyimide, for epitaxial lift off (removal of the substrate for reuse). Ill start ordering things
right after I find that out.
Oh.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
