Bidyut Das

10 Questions 27 Answers 0 Followers

Questions related from Bidyut Das

Can any expert help in solving the following DSC curves?

I have two DSC curves, attached below. One of them shows an endothermic peak at 90 and another one at 71⁰C. Are these two peak shapes glass transition temp (considering enthalpy relaxation...

04 November 2023 3,977 11 View

Fluorescence lifetime for excimers: How to detect the rise time?

Below is my fitted data of FL lifetime of a compound in solid state after fitting into biexponential components which shows one component to be positive amplitudes (denoted by B) and the other...

21 September 2023 9,126 4 View

Can there be charge transfer from solvent to solute in excited state?

I have a compound under investigation for its photophysical characteristics, and during investigation of its emission spectra with varying polarity I observed a red shift from low to high polar...

05 July 2023 8,056 3 View

What could be the probable reason for splitting of the ESR peak (as attached)?

I have a solid state X-band ESR spectra of an organic compound, as attached here. Unlike normal spectra, the spectra of my compounds seems to be peculiar in nature. What could be the possible...

16 February 2023 9,438 1 View

Can the g-factor of a compound be greater than 2.003 ?

An EPR spectrum of an organic compound was recorded on solid state which resonated at around 83 mT but on calculating the g-factor the value came out be nearly 8.00 which is too high than...

28 November 2022 8,239 4 View

What could be the probable reason for dual emission as discussed below?

I have an oxindole derived compound. To study its photophysics the compd was dissolved in DCM with varying concentrations but when emission was recorded it was observed that at low concentration...

16 November 2022 4,268 2 View

Are emissions sometime excitation wavelength dependent?

I have synthesized a compound which is pure as well as no other possible diastereomers are present in it, as evident from ¹H NMR. On inspection of its photophysical properties an anomaly was noted...

09 December 2021 5,149 3 View

TGA and DSC analyses

Can any expert help in solving the DSC peaks along with the TGA curves of a compound? Earlier, some experts suggested me to run a TGA when I put up the DSC curve in aprevious question. So here is...

01 January 1970 1,899 10 View

High g-value in EPR of an organic compound

I measured an EPR spectra (attached) of an organic compound which shows very high deviation of g-value (2.28731) from the normal value of an electron (2.003). What could be the plausible...

01 January 1970 4,516 1 View

Fluorescence of a compound in high polar solvents.

Hello. I am studying photophysical characteristics of a compound, and have observed that it is nearly non-fluorescent in low polar solvent like DCM, however, if the solvent is switched towards...

01 January 1970 9,905 2 View