Related Experiment Video
Updated: Jul 10, 2026

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet (VUV) Synchrotron Radiation
Published on: October 30, 2012
[A high transmittance material in UVc band]
Wen-bo Lü1, Qiang Xu, Wei-min Du
1School of Physics, Peking University, Beijing 100871, China.
Abstract:
Spectral characteristics of an organic material in acid with different concentrations were investigated in the solution of a proper acid concentration. The results showed that at 252 nm the transmittance T = 56.5%, but at 290 nm the material had a strong absorption peak (epsilon > 10(4) L. (mol.cm)-1). The absorbance A280-298 nm > 8, i.e. T280-298 nm < 10(-8). The band width was about 16 nm. Therefore, this material has conspicuous characteristics such as high transmittance and deep cutoff in the background in ultraviolet-c band. The transmission peak can be shifted in the range of 251-260 nm by changing the pH value of the solution and selecting solution with a different polarity. By analyzing the spectra of the material in acid we found that the two original absorption peaks disappeared, and a new strong absorption peak appeared at 290 nm. Moreover, it seems to be some relation between the two absorption peak intensity and the new peak, which needs to be further studied. Using this result, we can produce high quality UV-filters of this material with traditional coating and colour glass technology.
More Related Videos
10:06Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs
Published on: July 2, 2020
07:23Light-induced Patterning and Grafting for Slippery Surfaces based on Silane-coated Nanoporous Structures
Published on: November 14, 2025
Related Concept Videos
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
UV–Vis Spectrum
The UV–Vis spectrum of a molecule is the plot of its absorbance versus wavelength. The plot is drawn by taking molar absorptivity (ε) or log ε on the y-axis (ordinate)...
UV–Vis Spectroscopy of Conjugated Systems
One of the factors influencing λmax is the extent of conjugation in the...
UV–Vis Spectroscopy: Molecular Electronic Transitions
UV–Vis Spectrometers
UV–Vis Spectroscopy: Woodward–Fieser Rules