How this moiety can react with hypochlorite (ClO-)?

Hi, I have a question about the reaction between julolidine moiety and hypochlorite (ClO-). Please see below the scheme. The color change is very interesting. It changes from yellow to purple...

01 February 2020 6,407 1 View

What is the mechanism of peroxyacid synthesis?

http://www.orgsyn.org/demo.aspx?prep=cv6p0276 Hi, I synthesized peroxyacid according to above link. Also I checked that it was successfully synthesized. However, I've wondered why those reagents...

10 November 2018 4,867 0 View

How to interpret blue shifted emission and red shift UV-vis?

Hi, I want to interpret the mechanism of blue shift emission. I carried out some experiments about metal detection. The ligand showed green fluorescence and if the metal bound to the ligand,...

10 November 2018 7,822 4 View

How much is allowable range in ESI-MS analysis?

Hi, I'm wondering how broad the allowable range in mass spectrum and reason. (the gap between calculated exact mass and experimental data) I've known that the error range is 1 because of one...

07 August 2018 3,138 3 View

How can I calculate association constant in fluorescence by substitution of fluorescence intensity?

Hi, I want to calculate association constant through following method Talanta Volume 41, Issue 4, April 1994, Pages 599-609 However, I don't understand why I-I0 could be used. Could anyone...

06 July 2018 3,195 0 View

What is 'washing' meaning in organic synthesis?

Hi, I want to synthesis some compound and found references of them. However, I don't know what 'washing with NaHCO3 solution' means. (Please look at the picture) What is different from...

04 May 2018 8,784 9 View

Can solvent affect to coordination number?

Hi, I should prepare cobalt complex experiment using MIMT (2-mercapto-1-methylimidazole). In this experiment, the coordination numbers were changed depending on what solvent we use. In case of...

04 May 2018 8,520 2 View

Does the fluorophore have to act only as an electron donor?

Hi, I want to understand fully about ICT mechanism (intramolecular charge transfer) If the ligand having fluorophore doesn't have fluorescence and act as an electron acceptor (EWG), doest the...

03 April 2018 2,155 3 View

How can I separate organic layer with miscible solvent?

Hi, When I read this paper, I wonder how to separate organic layer with miscible solvent. (Bull. Chem. Soc. Jpn., 53, 1181-1182 (1980)) The ethylene glycol is miscible with HBr or sth. So it is...

03 April 2018 3,318 0 View

Why does nitro group(-NO2) have poor solubility in polar solvents?

Hi, I want to know why nitro group and also sulfonate group have poor solubility in water and other polar solvents(DMSO, DMF, MeOH, etc.). Actually I thought the reason is polarity but it...

03 April 2018 9,719 1 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

How to calculate Ligand-active site distance in a ligand-protein complex from MD simulation?

I have run a MD simulation of a ligand-protein complex in GROMACS using CHARMM forcefield. Reviewer has asked me to calculate Ligand-activesite distance and binding free energy of ligand with...

27 February 2021 4,703 1 View

Which database would give me this list of chemical components?

Dear colleagues: I would like to know if anyone knows of a database that gives me the parameters pH, K, K, Mg, P, C, N, Zn, Cu, Ni and Cd of common foods. I find a lot of information of proteins,...

26 February 2021 5,525 3 View

Why is NH4OH added in heavy metals limit test?

The limit test I'm referring to is USP method II. In this procedure you need to dropwise add 6N of NH4OH to the sample until it the pH is alkali. After that you need to dilute and add HOAc until...

23 February 2021 2,049 3 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View

No title

22 February 2021 9,932 11 View

Can anyone help or comment on solubilising chlorobutanol in aqueous injections in minimum time possible?

Please suggest solubilisation of chlorobutanol in injections. Tried pH and high temperature. But the issue is of assay drop. If anyone can suggest any solution. Its a commonly used excipient for...

21 February 2021 7,397 1 View

What reaction will occur when adding hexamine into ammonium nitrate in an acidic medium?

Hello, I am investigating properties of water in oil emulsion explosives. And adding hexamine (hexamethylenetetramine) into one of the phases that are used to make the emulsion should increase the...

21 February 2021 8,680 1 View

What properties of water shall be analyzed and evaluated to test the effectiveness of activated carbon?

I would like to ask what other properties of water (pH and such) shall be analyzed and evaluated to test the effectiveness of activated carbon from filtering the contaminants present in the water?

20 February 2021 9,422 8 View

Phenol-pH graphic?

We want to use phenol pH graphic to measure the pH of mediums before and after inhibitor application to cells. We have phenol absorbence values at 460, 560 and 720 nm wavelength. When we measure...

20 February 2021 7,700 3 View