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Questions related from Roderick Abdilla
If you have a molecule such as a quinoline or an indole, if it is treated with an acidic solution, does fluorescence get enhanced because the n-Pi* state is no longer possible or because...
18 August 2024 852 0 View
When I react DABCO with CPTMS-treated silica, I am getting very poor loading. The same happens when I use DBU or piperazine. Why do you think is this? Could it be that the solvent (acetone) is not...
08 April 2024 3,488 3 View
What would be the best pulse program to obtain a NOESY spectrum with the best peak resolution and shortest acquisition time on a Bruker Avance IIIHD NMR spectrophotometer?
27 March 2024 6,052 1 View
Why is it that in the attached image: H4 is not coupling with C5, C6 if they are separated by two bonds? Why does H3,5 giving a cross peak with C3,5 if they are pertaining to equivalent centres?...
10 February 2024 5,855 6 View
How can one determine the stirring and sonication rate needed to get accurate and reliable results by a Mastersizer? We want to use this instrument to get a particle size distribution for a...
24 November 2023 10,141 1 View
I am working on the Biginelli-like reaction between cyclopentanone, benzaldehyde, urea to form the 4-component product. During the course of the reaction a white solid which during work up does...
14 March 2022 455 1 View
I have commercially available weakly acidic alumina provided by SIgma ALdrich. Can I use it instead of gamma alumina for catalyst loading?
30 January 2016 2,927 2 View
Is there any difference between Montmorillonite K10, bentonite and Montmorillonite KSF? apart from BET surface area? I am asking this because I intend to use MK10 or bentonite instead of MKSF as a...
09 January 2016 6,699 12 View
Which Bruker pulse program gives the best NOESY spectrum in the shortest possible time?
01 January 1970 7,282 3 View
I am trying to use the ink C2070424P2 in order to carry out drop casting or inkjet printing of it. However it is suitable for screen printing according to the specs. Has anyone tried to dilute it...
01 January 1970 1,804 5 View
01 January 1970 228 0 View
In a process of biodiesel product from waste cooking oil I am first pre treating the oil with methanesulfonic acid and methane to reduce the FFA content. Then, I separate the acid layer before...
01 January 1970 3,284 1 View
