scispace - formally typeset
Search or ask a question

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.
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.
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.

See what other people are reading

What is solvent effect in uv-vis spectrometry?
5 answers
The solvent effect in UV-Vis spectrometry plays a crucial role in influencing the absorption spectra of various compounds. Different solvents impact the intensity, shape, and position of the maximum electronic absorption spectra. Solvent parameters affect the spectral and photophysical properties of compounds, leading to variations in absorption and emission maxima, fluorescence quantum yields, and Stokes' shifts. Solvent polarity and hydrogen bonding properties can be probed using molecules like berberine, as suggested by linear solvation energy relationships. Additionally, the interaction of solvents with compounds like tannic acid mixture results in pH-dependent redox behavior, with oxidation potentials varying in different solvents. Therefore, the choice of solvent in UV-Vis spectrometry significantly influences the analytical outcomes and must be carefully considered for accurate measurements.
What is chromium III maximum absorption wavelength?
5 answers
Chromium(III) exhibits different maximum absorption wavelengths based on the complex formed and experimental conditions. The absorption peaks for chromium(III) were found at 287 nm, 400 nm, 555 nm, and 580 nm, and in the range of 2632 to 2041 A (UV region). These values vary due to the specific ligands used, pH levels, and the nature of the medium. The absorption peaks at these wavelengths are crucial for spectrophotometric determination of chromium(III) concentrations in various samples, ranging from nutritional supplements to industrial wastewater. Understanding these distinct absorption wavelengths is essential for accurate and sensitive chromium(III) analysis in different applications.
What substances can be determined by means of the UV-VIS spectrophotometer?
5 answers
The UV-VIS spectrophotometer can determine various substances such as urea, creatinine, uric acid, phosphate, and β 2-microglobulin in dialysate samples and blood. It is a valuable tool for monitoring compounds during dialysis sessions, with specific wavelength ranges showing high correlation for different substances. Additionally, UV-VIS spectroscopy finds applications in pharmaceuticals for qualitative and quantitative analysis of drugs in different matrices, coupling with chromatographic methods, and addressing challenges related to chemical reactions before measurements. This analytical technique is versatile, allowing for the determination of a wide range of substances in different fields, showcasing its significance in research and practical applications.
Does ascorbate has an absorption peak at 225 nm in UV-Vis spectroscopy?
4 answers
Ascorbic acid, or ascorbate, exhibits absorption peaks at various wavelengths in UV-Vis spectroscopy. While it absorbs at around 247 nm in aqueous solution, it shows a peak at 258 nm in methanol: water solvent. Additionally, in cerebrospinal fluid, ascorbic acid has a peak at 264 nm. However, there is no specific mention of an absorption peak at 225 nm in the provided contexts. The absorption peaks mentioned in the contexts are at 247 nm, 258 nm, and 264 nm for ascorbic acid in different solvents and environments. Therefore, based on the data available, there is no direct evidence to suggest an absorption peak for ascorbate at 225 nm in UV-Vis spectroscopy.
What is the solubility of amiodarone in mixtures of organic solvents?
5 answers
The solubility of amiodarone in mixtures of organic solvents varies based on the solvent composition and temperature. Research by Eghrary et al. found that in binary mixtures of ethanol + water, the maximum solubility of amiodarone was observed at 313.2 K with an ethanol mass fraction of 0.76. On the other hand, Wu et al. determined the equilibrium solubility of amrinone in various solvent mixtures, including ethanol + water, showing the influence of different solvent combinations on solubility. These studies highlight the importance of solvent selection and temperature control in optimizing the solubility of amiodarone in organic solvent mixtures for various applications.
What is the wavelength of UV light with maximal absorbance by purified protein?
5 answers
The wavelength of UV light with maximal absorbance by purified protein varies depending on the specific protein being studied. For instance, myosin B solution shows maximum absorption at 278 nm, while a protein assay at 187 nm allows quantitation of proteins in aqueous solutions. Additionally, exposure to UV light between 290-320 nm induces aggregation in crystallin proteins. Electronic absorption spectra of proteins typically range from 185-320 nm, with some proteins exhibiting absorption beyond 350 nm. Moreover, a study comparing absorbance readings for protein determination at 600 nm using different instruments showed high correlation values. Therefore, the maximal absorbance wavelength for purified protein can vary based on the protein type and experimental conditions.
Why residual solvent reduces Tg of epoxy?
5 answers
Residual solvent reduces the glass transition temperature (Tg) of epoxy due to its influence on the curing process and final properties. The presence of solvent, even in small amounts, can affect the curing mechanisms of epoxy resins, leading to decreased reaction rates, activation energy, Tg, and elastic modulus. Residual solvent in epoxy coatings can result in the presence of more low-molecular-weight/low crosslinked sites, affecting mechanical properties and corrosive behavior. Studies suggest that reductions in Tg in epoxy-based nanocomposites may correlate with residual solvent content, while increases are more likely when no solvent is used or after rigorous degassing. Therefore, controlling and minimizing residual solvent content is crucial to maintaining the desired Tg and overall performance of epoxy materials.
Why residual solvent reduces Tg of "silver filled epoxy"?
5 answers
Residual solvent in silver-filled epoxy can reduce the glass transition temperature (Tg) due to incomplete polymerization, leading to negative consequences for electronic devices. Studies suggest that reductions in Tg may correlate with the presence of residual solvent or mild degas conditions, while increases are more likely when no solvent is used or after rigorous degassing. The curing reactions of epoxy resins can be affected by the addition of solvents, with even small amounts impacting reaction rates, activation energy, Tg, and elastic modulus. Additionally, the presence of residual solvent in graphene oxide-based epoxy coatings can lead to poor bonding between metal and coating, affecting mechanical and corrosive behavior. Therefore, understanding and controlling residual solvent content is crucial to prevent adverse effects on Tg and overall performance.
What is the absorption spectrum of beta-carotene?
5 answers
The absorption spectrum of beta-carotene has been extensively studied using quantum chemistry and dynamics simulations. These studies reveal that beta-carotene exhibits a complex absorption spectrum due to the involvement of numerous vibrational modes during the S0 -> S2 optical excitation. Additionally, two-photon absorption (2PA) cross-section spectra of beta-carotene show distinct peaks at 650 nm with an absorption cross-section of approximately 5000 GM, indicating its unique optical properties. Furthermore, two-dimensional electronic spectroscopy (2D) experiments shed light on the ultrafast energy dissipation network in beta-carotene, providing insights into its electronic structure and spectral densities contributing to the observed optical lineshapes. The absorption properties of beta-carotene in solution were also investigated using the open-aperture z-scan technique, revealing significant two-photon absorption coefficients in the 725-790 nm wavelength range.
Can acetone shift the spectrum of pigmetns?
5 answers
Acetone can indeed induce shifts in the spectrum of pigments. Research indicates that acetone's infrared spectrum shifts are influenced by the solvent's Lewis acidity, with strong correlations observed. Additionally, studies on acetone-water complexes show red shifts in the C=O stretching mode of acetone, indicative of hydrogen bonding with water. Furthermore, investigations into the interaction of pig kidney medium-chain acyl-CoA dehydrogenase with acetoacetyl-CoA reveal significant chemical shift changes in the carbons of acetoacetyl-CoA when complexed with MCAD, suggesting a change in the molecular configuration due to the binding, which can impact spectral properties. These findings collectively support the notion that acetone can indeed influence pigment spectra through various mechanisms.
Can core shell structures be used in explosive detection?
5 answers
Core-shell structures have shown promise in explosive detection applications. Studies have explored their use in detecting explosives like TNT and TNP. For instance, a multifunctional core-shell structure using beta-NaYF4:Yb,Er@NaYF4 nanometer particles demonstrated stable and effective explosive detection results. Additionally, core-shell engineering has been applied to energetic materials, including explosives, to enhance their properties and interactions. These structures offer improved interfacial interactions and can be tailored for specific detection purposes. Furthermore, the core-shell heterostructure composite materials have been developed for detecting poisonous and harmful gases in the air, showcasing the versatility of core-shell structures in sensing applications. Overall, core-shell structures hold potential for enhancing explosive detection capabilities through their unique properties and structures.