Why DMSO ? You can use ethanol or water

Dear Sumin,

you should really write what you want to do, I can only guess from your question:

1. You want to use plant extracts to stabilise silver nano particles, right?

2. And your problem is that water is not extracting the desired molecules from the plants, right? How do you know this? NMR-Spectra?

3. DMSO is suitable for the extraction, right? How do you know this?

4. Alcohols are also suitable for extraction?

5. What are the molecules in the extracts?

6.When it comes to stabilise the surface of nanoparticles to prevent agglomeration all kinds of molecules can stabilise the surface. However, the nature of the particle and the nature of the surface ligand in combination decide whether this is a good stabilisation.

7. In chemistry we are using the HSAB principle (look it up in a suitable textbook). For your case HSAB says that the soft metal silver is strongly bound by soft ligands such as DMSO, thiolates, sulfides etc. Now it depends if there are stronger ligands in your extract to replace eventually DMSO from the surface. If not, DMSO might cover your particles. Using alcoholic extracts would probably be better to give the extract molecule a chance.

But still, If you are more precise in your questions, you will get precise answers!

Dear Axel, I would like to synthesis silver nano particles by mixing AgNO3 and my plant extract.. I have to dissolve my methanolic extract in dmso.. So I would add my extract in dissolved in dmso to AgNO3 solution. My doubt is that whether this dmso make a reaction with AgNO3.Then I would like to know can I consider the synthesized nano particles are only by the effect of my extract.

Dear Sumin,

your question are still very unclear.

What is the purpose of the extract? Stabilisation of the particles, reduction of Ag+ to Ag particles or both?

Your terminology ... this dmso make a reaction with AgNO3 ... is unclear, even unscientific, sorry. What do you mean?

@ Axel I assume that the poster wants to produce Ag nanoparticles by some form of 'green synthesis'. The starting precursor for silver nanoparticles is usually AgNO3 (or the diammine complex) in water. AgNO3 is very soluble in DMSO (130 g/100g solvent) but we have no idea of what reducing agent (and stabilizing ligand) would be present in the plant extract. As an illustration, pyrethrum is produced by a hexane extraction of the appropriate plants.

In my view, the route would be to dissolve the AgNO3 in DMSO and then see if the plant extract is capable of reducing it. Not really a elegant synthesis. We note that AgNO3 also has some solubility in EtOH:

Solubility in ethanol: 3.1 g/100 g (19 °C)

The low concentration would probably favor small-sized nanoparticles (1 - 10 nm).

See also (open in IE):

Silver colloids and invisible ink

https://www.brainshark.com/malvern/vu?pi=560497681&b=1&tx=120486&c1=22

Metal colloids - their preparation, application and characterization

https://www.brainshark.com/malvern/vu?pi=529368070&b=1&tx=120486&c1=22

And also the attached.

It will be better if Sumin Mary Jose provide the name of the plant extract and purpose of using this plant extract. Then it will be easier for us to answer your query.

Regards

Why DMSO ? You can use ethanol or water

What if we want to use plant extract for antibaterial or antifungal activity. How much DMSO is required for one gram of plant extract? and how to dissolve plant methanolic extract in DMSO? Muhammad Ismail Sadanand Pandey

Mian Adnan Kakakhel You can't use a DMSO extract for antibacterial or antifungal activity in humans as this solvent will endanger the health of the person receiving it. Only aqueous based systems will be tolerated by living bodies - perhaps with a little ethanol.