Hi

you can find out yourself by running a sample of Zn Cl(0.001ppm)  and determine its O D at various wavelength.and similarly repeat with Zn O (0.001ppm) .then calculate Max.wave at which it absorbs

  Use UV -VIS spectro meter for above suggested method

Thanks Susan Verghese. I hope that you can help me with any papers that suggest the ZnCl peak wavelength.

Look at the  NIST (national Institute of Standards, USA)

Are you really interested in receiving information about spectra of the molecule radical ZnCl?

If it is so then follow: http://www.icsoi.arizona.edu/ziurys/zncl.pdf

Authors of this article describe how they receive the gaseous ZnCl for obtaining its spectra. ZnCl radical is not a stable solid compound and one can say nothing about ZnCl dissolution. But in this article high resolution rotational absorption spectra are presented.

2 Gerhard Herzberg, Klaus-Peter Huber.Molecular, Spectra and Molecular Structure: Constants of diatomic molecules: (64)Zn(35)Cl  ν00 for B  -  X transition  is R (27213cm-1)H – 367.47nm

3. Follow http://ijsr.net/archive/v4i11/SUB158780.pdf for the ZnO spectrum

4. Sorry, I have not found ZnCl and ZnO in the NIST diatomic molecules database

5 Du you need ZnCl2 spectrum?? Then follow Susan Verghese

UV-Vis Abs Spectoscopy method itself can distinguish difference between colloid of ZnCl nanoparticles or just sample of ZnCl solution? The abs peak will it be different?

I found ZnCl nanopowder from local chemical company, however in micro order diameter size. Quite different from my sample size (nano order).

thanks for the ZnO spectrum. I also cannot find the reference in NIST for ZnCl.

Thanks Hafzan Ishak 

1.      I think it does not be difference in peak position between spectra of colloid of ZnCl nanoparticles or just sample of ZnCl solution

2.       Spectrophotometers as a rule are of not high spectral resolution.  In any case it is possible obtaining a suitable spectrometer

3.        The difference may occur due to the dissolution procedure.  If you need adding HCl for dissolution your ZnCl sample then perhaps the ZnCl2 admixture can gave an interfering spectrum.  

4.       We have some experience in receiving diatomic molecules radical by decomposition of solid compounds in low pressure inductively  coupled plasma http://link.springer.com/article/10.1134%2FS0030400X0803003X#/page-1

I think one can receive the ZnCl radical in the same way