Absorption of aromatic compounds in UV-visible spectroscopy

[@jeetsaha1514]

Terrific!! To the point!

[@Anand13691]

Very useful information sir🙏 kindly explain aromatic compound, Ninhydrin absorption region and fluorescence region.

[@anjalisharma314]

I need to see the absorbance of dichloromethane by carbon by using uv visible spectrophotometer. I had already run a pure dichloromethane to full range of uv visible spectrum I e,190 nm-1100nm to see at which wavelength its peak is seen . And,its highest and clear peak have been seen in 208nm. But in literature the range of DCM for uv visible spectrum is 233nm, and highest 274 nm. Somewhere it is written the range is between 200-300nm. And according to 'OECD guidelines for testing of samples' by uv visible spectrum, it's range is 235 nm for dichloromethane. Now I am confused what wavelength range I must fix for my samples. Please guide me.

[@aqsaahmad4654]

hello sir....can u please guide me for protocols necessary to perform uv analysis of a compound isovanillin

[@keyurpatel2673]

Sir make a video on IR INTERPRETATION

[@egpat]

Sure, I will upload it shortly. Thanks for your interest

[@akashgayakwad8983]

Is secnodary peaks visible in uv spectra at 255nm , any can answer me ??

[@RubyBashir]

How we calculate lambda max for flurbiprofen?

[@egpat]

Flurbiprofen is an aryl propanoic acid derivative which shows lambda max around 230-250 nm. Since here functional group, carboxylic acid is not directly attached to aromatic ring, it is not conjugated and therefore its not possible to calculate with woodward fieser rules discussed in this video. But since it has biphenyl ring system, the lambda max may fall in between 230-250 nm.

[@physicsminded4929]

Raman spectrocopy