UV-Visible Spectroscopy

UV-Visible Spectroscopy refers to absorption spectroscopy in the ultraviolet-visible spectral region of the light spectrum. | Contact experts in UV-Visible Spectroscopy to get answers

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Questions related to UV-Visible Spectroscopy

What is the lambda max (absorbance peak) in UV region for the following samples?

I performed UV-Vis spectroscopy for following samples.What is the right method to find lambda max

20 June 2018 8,465 10 View

How can i calculate FC (Field capacity) , MAD (Max.allowed depletion) and WP (wilting point) when given only soil type?

I am trying to implement a simple irrigation model based on evaporotranspiration and soil moisture sensors and need to calculate the 3 thresholds above.

05 June 2018 6,468 3 View

Could anyone tell me how to find refractive index of SiO2 thin film, from its UV/Vis transmission spectrum?

I have recorded UV/Vis transmission spectrum of SiO2 thin film deposited on glass. I want to find the refractive index of the film. My transmission spectrum does not represent interference...

02 June 2018 5,622 5 View

What do the peak of UV-Vis spectrophotometer signifies? What is the standard protocol to analyse the data from the peak of UV-Vis spectrophotomer?

Different research articles shows the different peaks of the iron oxide nanoparticles so which one is correct. Is there a standard peak for iron oxide nanoparticles in UV-Vis...

01 June 2018 2,995 3 View

Is there any relation between oscillator strength of an absorption signal with the amount of water hydrogen bonded in the inorganic complex?

We have observed a decreasing intensity in the absorbance and emission spectrum of an inorganic complex with the increase in the amount of water (probably coordinating) in the system. There is no...

31 May 2018 7,077 5 View

Is there any method to minimise the absorbance at 280 nm of tryptophan residue in a protein?

I am trying to study A colorimetric reaction of a protein but I am unable to resolve the change in absorbance due to the intrinsic peak at 280 nm arising due to tryptophan residue.

29 May 2018 3,829 4 View

Has anyone conducted study on luminescencse characrteristics for YAG nanoycrystals (UV Vis and Fluorescence spectroscopy) who can help me ?

I am looking for research papers/data regarding above mentioned tests for YAG and reason or mechanism particular for these peaks. UV VIS result shows single peak at 205 nm. Fluorescence...

17 May 2018 2,262 8 View

What is the blue-shift in UV-vis?

hello, Im having trouble in extracting information from my uv-vis data. The sample the I analyzed is protein corona. Before that, I already characterize 40 nm of gold nanoparticle and obtain its...

16 May 2018 9,036 7 View

What's the pink(with some purple) solution of MAX(titanium carbide, Ti3AlC2) and 12M HCl after 1-2 days standing?

I am trying to exfoliate Ti3AlC2 with the method of Li/HCl. Ti3AlC2 (>=98%) was purchased, and has been characterized by XRD. Since the HCl itself is not enough to exfoliate Ti3AlC2, i...

14 May 2018 6,978 1 View

Can anyone say why trolox does not give a peak in uv visible region?

Hi, I have a problem about trolox standart calibration. In papers it is said that it gives peak in uv-vis region, generally 734 or 725 nm. But i am getting peak about 290 nm. Also, trolox is not...

08 May 2018 2,019 3 View

Which basis set will be suitable for a triad's UV-Vis DFT computation?

I tried b3lyp/6-31g(d) which is approx. 100nm red shifted from experimental UV-vis absorption. cam-b3lyp/6-31g(d) is about 100nm blue shifted.wb97xd/6-31g(d) is further blue shifted to 150-200 nm....

03 May 2018 4,353 4 View

Can i find band gap of TiO2 NRs through IV curve?

Hydrothermally grown TiO2 NRs on FTO glass . Is there any possibility to find out band gap of TiO2 NRs without UV-visible spectroscopy.

28 April 2018 6,407 2 View

If UV emission center from Absorbance spectra (obtained from UV-Vis spectroscopy) lies between the 298nm to 302nm what do we observe from it?

For the attached Absorption spectra graph, 1. As the absorption intensity increases for some samples 0.7 to 1.4, is it due to hyperchromic effect? 2. If UV emission center from Absorbance...

22 April 2018 7,096 3 View

How can I adjust the calculated UV spectrum of a complex so it fits the experimental data?

I ran a TDDFT calculation of a copper(II) complex to get the UV-Vis spectrum. The maximum wavelength of each band is basically the same for both spectra (calculated and experimental), but some of...

20 April 2018 2,370 5 View

How to take UV-Visible spectrum of prepared photocatalysts?

I have prepared photocatalysts to carry out dye degradation. Is there any possible way to have UV-Vis spectrum directly using those powdered catalysts or should it be dissolved in any solvent. If...

19 April 2018 4,153 9 View

How can we analyze defect structures of ZnO using UV-Visible techniques?

Dear all How can we discuss defect structures of ZnO using UV-Visible techniques? Thank you

16 April 2018 6,295 3 View

how to detect the loss of the quantity of 4-Nitrophenol non-reduced to 4-aminophenol using UV-visible spectra?

Dear all; How to detect the loss of the quantity of 4-Nitrophenol non-reduced to 4-aminophenol using UV-visible spectra. Thank you

16 April 2018 5,537 3 View

How to explain the decrease of the band gap of a semiconductor-bulk- spinel (p-type) with substitution"lattice parameter decreases as well"?

Dear all, I have done an a.b.initio calculation "density of states" and found that my band gap decreases with substitution, while the lattice parameter deceases "experimentally" normaly it should...

13 April 2018 4,844 9 View

Calculating HOMO-LUMO gap from UV-Vis spectra?

Hi everyone. I have seen in different sources that there could be 2 approaches to calculate the HOMO-LUMO gap of a compound from the data obtained via UV-Vis spectrocopy. I've seen people doing it...

10 April 2018 7,435 4 View

Is it possible to confirm you have 5-membered cyclic carbonates just by the IR and UV-vis spectras?

What characterization is necessary to confirm the presence of cyclic carbonates? Until now it has IR and UV vis

10 April 2018 8,524 1 View

How are Refractive index changes controlled?

When doing UV-Vis spectroscopy, how do you control for changes in refractive index? Isn't that something that the UV-Vis machine does automatically?

10 April 2018 8,731 4 View

How to measure the trace amount of zirconium concentration in water samples?

If I want to measure the trace amount of ZrOCl4.8H2O in water sample by UV-Vis Spectrophotometer, what is the easiest procedure?

03 April 2018 9,002 3 View

Quantum confinement effect in CdS nanowire?

Can we talk about quantum confinement effect in CdS nanowires with diameter of about 50 nm and length in microns?

29 March 2018 4,523 2 View

Is there any formula to calculate the sp3/sp2 ratio from UV VISIBLE spectroscopy?

I deposited the DLC coating on the silicon subtrate , now i want to finf out the ratio of sp3/sp2 by uv visible spectroscopy.

23 March 2018 2,969 3 View

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