bk7295@leah.Albany.Edu (Brian A. Kell) (09/06/90)
I have a collegue who is teaching some undergraduate students about lab techniques, instruments, protocols, etc. She's interested in acquiring some cheap organic or inorganic compound whose UV/VIS spectrum changes with temperature when in aqueous solution, say in the range 0-90 C, in order to demonstrate the temperature-controlled spectrophotometer. Any ideas? This could be anything, as long as it is cheap and safe. Thanks in advance. I'll summarize if there's enough interest.
mikew@wheeler.wrcr.unr.edu (Mike Whitbeck) (09/07/90)
In article <3596@leah.Albany.Edu> bk7295@leah.Albany.Edu (Brian A. Kell) writes: |I have a collegue who is teaching some undergraduate students |about lab techniques, instruments, protocols, etc. She's interested |in acquiring some cheap organic or inorganic compound whose UV/VIS spectrum |changes with temperature when in aqueous solution, say in the range 0-90 C, |in order to demonstrate the temperature-controlled spectrophotometer. | |Any ideas? This could be anything, as long as it is cheap and safe. | |Thanks in advance. I'll summarize if there's enough interest. Just about anything that polymerizes (or even dimerizes) will do this. Try 2-methyl-2-nitroso-propane (aka t-butyl nitroso) CH3 | CH3---+----CH3 | NO easy to make, can also buy - used in NMR spectrometry solid is colorless (white crystals) but vapor/liquid is intense blue (strong absorption in red ca 600 nm as I recall) melts near room temp, fairly high v.p. as well. ___________________________________________________________ |Mike Whitbeck | | |Desert Research Inst. | mikew@wheeler.wrc.unr.edu | |POB 60220 | | |RENO, NV 89506 | 702-673-7348 | |__________________________|______________________________| All academics have the potential for being insatiable... but the chemists are the most expensive and insatiable among the expensive and insatiable. - J. Martin in "To Rise Above Principle" ~ ___________________________________________________________ ~ |Mike Whitbeck | mikew@wheeler.wrc.unr.edu | ~ |__________________________|__RENO___NEVADA_______________|