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Absorption (electromagnetic radiation)
About: Absorption (electromagnetic radiation) is a research topic. Over the lifetime, 76674 publications have been published within this topic receiving 1381221 citations.
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TL;DR: The application of X-ray absorption spectroscopy to the study of the Mn4Ca cluster in Photosystem II is presented and developments in theory in understanding the XANES spectra are described.
Abstract: This review gives a brief description of the theory and application of X-ray absorption spectroscopy, both X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), especially, pertaining to photosynthesis. The advantages and limitations of the methods are discussed. Recent advances in extended EXAFS and polarized EXAFS using oriented membranes and single crystals are explained. Developments in theory in understanding the XANES spectra are described. The application of X-ray absorption spectroscopy to the study of the Mn4Ca cluster in Photosystem II is presented.
227 citations
TL;DR: In this article, the absorption wavelengths and oscillator strengths of a series of organic dyes important for the dye industry (indigo, azobenzene, phenylamine, hydrazone, anthraquinone, naphthoquinone and cationic dyes) were calculated using time-dependent density functional theory.
227 citations
TL;DR: In this paper, the authors employed a facile solvothermal process to fabricate the unique flower-like MoSe2 spheres for eliminating microwave interference issue, and then tuned the morphology configurations of MoS2 to obtain the best microwave absorption performance.
226 citations
TL;DR: In this article, the optical properties of zinc oxynitride (ZnxOyNz) films are investigated by using a double beam spectrometer to measure the optical band gap.
226 citations
TL;DR: In this paper, the authors used femtosecond time-resolved UV−visible absorption spectroscopy to study the UV photochemistry of trans-azobenzene (t-AB) in solution at 30 °C.
Abstract: Femtosecond time-resolved UV−visible absorption spectroscopy has been used to study the UV photochemistry of trans-azobenzene (t-AB) in solution at 30 °C. Photolysis of t-AB at 303 nm results in transient absorption at 370−450 nm, the decay of which can be fitted by a sum of two exponential components. The shorter-lived component has a lifetime of 0.9 ± 0.2 ps in hexane, cyclohexane, and hexadecane and 1.2 ± 0.2 ps in acetonitrile; this is attributed to the S2(ππ*) excited state of t-AB. The longer-lived component has a lifetime which is similar to the recovery time of the ground-state absorption of t-AB at 303 nm, found to be 13 ± 1 ps in hexane, cyclohexane, and hexadecane and 16 ± 1 ps in acetonitrile. This longer-time-scale process is attributed to the internal conversion of an intermediate excited state, S†, into ground state t-AB, and this intermediate is tentatively assigned as a twisted conformer of excited t-AB on the S2 or S1 potential energy surface. The vibrational relaxation of hot t-AB molec...
226 citations