What compounds have absorption maxima about 315 nm?
Best insight from top research papers
Compounds with absorption maxima around 315 nm include polydiacetylenes with visible light absorption capabilities, various organic dyes like indigo, azobenzene, and phenylamine, and porphyrins and their metal complexes. Polydiacetylenes, especially those with cyanovinyl aromatic or quinoid side chain components, exhibit absorption maxima in the visible light range . Additionally, organic dyes such as indigo and azobenzene show absorption maxima around 315 nm when calculated using semiempirical molecular orbital theories like AM1, PM3, and PM5 . Furthermore, porphyrins and their metal complexes also display absorption band maxima around 315 nm in nonpolar and aprotic polar solvents due to dispersive stabilization of the excited state .
Answers from top 5 papers
More filters
Papers (5) | Insight |
---|---|
Aniline, phenol, and pyridine are compounds with absorption maxima around 315 nm, as indicated by quantum chemical calculations in the research. | |
43 Citations | Indigo and azobenzene compounds have absorption maxima around 315 nm based on calculations using AM1, PM3, and PM5 semiempirical molecular orbital theories. |
Polydiacetylenes with cyanovinyl aromatic or quinoid side chain components exhibit absorption maxima around 315 nm, showing extended wavelength absorption compared to other polydiacetylenes. | |
48 Citations | Porphyrins, phthalocyanine, their metal complexes, chlorin, and bacteriochlorophyll a exhibit absorption maxima around 315 nm in nonpolar and aprotic polar solvents. |
Compounds like conjugated carbonyl compounds, conjugated dienes, and polyenes are predicted to have absorption maxima around 315 nm using Woodward-Fisher regulations for UV-visible spectra. |
Related Questions
What is the lambda max absorbance for the color red?5 answersThe lambda max absorbance for the color red can vary depending on the specific compound or dye being considered. In the context of red dyes, a study on azo dyes mentions that the maximum absorption wavelengths of these dyes fall within a certain range, with average absolute errors in the calculated values using different methods. Additionally, research on red coloring compositions for color filters highlights the importance of specific absorption characteristics for achieving high brightness and visibility, with red dyes having a maximum absorption wavelength around 560-565 nm. Furthermore, the study on Re(I) complexes mentions a significant red shift in MLCT absorption bands, resulting in absorption maxima at 586 nm and above, which is highly unusual for such complexes.
What is the maximum absorption wavelength of isodomoic acid?5 answersThe maximum absorption wavelength of isodomoic acid is not mentioned in any of the provided abstracts.
What is absorption properties of skin?4 answersThe absorption properties of skin involve the ability of substances to penetrate the skin barrier and enter the body. Skin penetration studies have shown that different anions have varying levels of transport through the skin, with the order of permeation following the Hofmeister series. The presence of melanin in the epidermal layer of the skin affects the absorption of light in the visible and near infrared wavelength bands, with increasing absorption resulting in a decrease in light reaching deeper layers of the skin. The optical properties of biological skin, including absorption, can be reconstructed using experimental data and mathematical transformations. The stratum corneum, the outermost layer of the skin, is responsible for the permeability barrier, with diffusion across this layer being the rate-determining step in absorption through the skin.
Why does DNA absorb maximally at a wavelength of 260 nm?5 answersDNA absorbs maximally at a wavelength of 260 nm due to the presence of nitrogen bases and their secondary valence interactions. The absorbance at 260 nm is significantly higher than the absorbance calculated from the constituent nucleotides, indicating the presence of a secondary structure in DNA. This secondary structure is formed by interactions between the nitrogen bases, which collapse under mild treatments such as low pH, high temperature, or low salt concentration. The absorbance increase at 260 nm is also observed during the "unzippering" of the helical structure induced by UV radiation. Additionally, the absorption spectrum of DNA is affected by the presence of proteins, such as histones, which can mask the DNA absorption in the region below 200 nm. Overall, the absorbance at 260 nm is a characteristic feature of DNA and is influenced by its secondary structure and interactions with proteins.
What is the maximum wavelength of absorption for quinine in UV spectrometry?5 answersThe maximum wavelength of absorption for quinine in UV spectrometry is not explicitly mentioned in the abstracts provided.
What is the maximum wavelength of absorption for quinine in water?3 answersThe maximum wavelength of absorption for quinine in water is 347.5 nm.