Gopal Singh

7 Questions 84 Answers 0 Followers

Questions related from Gopal Singh

How can I calculate fluorescence quantum yield of aggregates if the leveling off tails are high?

IS IT CORRECT TO Use The absorbance of aggregate solution if the absorbance value is significantly changed/increased due to leveling off tail/mid scattering.

06 July 2015 8,281 9 View

Why is the energy level of ITO reported different in different papers?

I am always confused when i have to compare energy levels of my molecules with the energy level of ITO (Indium Tin Oxide). Different papers in literature report different energy level. Some papers...

19 May 2015 6,871 9 View

What is the effect of the hydrogen bonding on fluorescence decay time?

I am doing fluorescence studies of two molecules (one containing dibenzothiophene-S,S-dioxide and other benzothiadiazole) in THF/ water mixture. Fluorescence intensity decreases with increasing...

11 February 2015 1,430 7 View

Can the crystalline materials show glass transition temperature?

My organic sample is giving sharp peaks in XRD but still glass transition temperature around 250o C has been observed. Usually crystalline materials do not show glass transition temperature. (file...

26 January 2015 896 44 View

Why does the particle size differ in TEM and DLS measurements?

I got smaller particle size in TEM (Transmission Electron Microscope) images as compared to DLS (Differential Light Scattering) measurements of my organic sample in THF/water mixture(60% water).

25 January 2015 2,179 12 View

Why does the decay time decrease with increase in water fraction in solvent mixture?

Decay time of a molecule having charge transfer character shows decrease in life time with increasing amount of water in THF/Water system. Quantum yield also decrease along with red shift. But the...

28 December 2014 6,494 9 View

If a molecule gives two emission bands of equal intensity, then which emission band should be considered for calculating average life time?

Molecules having charge transfer character sometimes give two emission bands (one from LE state and other from CT state). TCSPC measurements at these two bands give different average life time....

13 December 2014 6,809 4 View