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Angulo G Grampp G Rosspeintner A 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2006,65(3-4):727-731
This paper presents a critical discussion on the representation of UV-vis-NIR light absorption and fluorescence emission spectra of polyatomic molecules in liquid solution. A general overview how to handle the experimental spectra in order to extract physical data from them is presented together with some simulations to show the errors that can arise from unfortunate manipulation. 相似文献
77.
White‐Fluorescent Dual‐Emission Mechanosensitive Membrane Probes that Function by Bending Rather than Twisting
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Heorhii V. Humeniuk Dr. Arnulf Rosspeintner Dr. Giuseppe Licari Dr. Vasyl Kilin Dr. Luigi Bonacina Prof. Eric Vauthey Dr. Naomi Sakai Prof. Stefan Matile 《Angewandte Chemie (International ed. in English)》2018,57(33):10559-10563
Bent N,N′‐diphenyl‐dihydrodibenzo[a,c]phenazine amphiphiles are introduced as mechanosensitive membrane probes that operate by an unprecedented mechanism, namely, unbending in the excited state as opposed to the previously reported untwisting in the ground and twisting in the excited state. Their dual emission from bent or “closed” and planarized or “open” excited states is shown to discriminate between micelles in water and monomers in solid‐ordered (So), liquid‐disordered (Ld) and bulk membranes. The dual‐emission spectra cover enough of the visible range to produce vesicles that emit white light with ratiometrically encoded information. Strategies to improve the bent mechanophores with expanded π systems and auxochromes are reported, and compatibility with imaging of membrane domains in giant unilamellar vesicles by two‐photon excitation fluorescence (TPEF) microscopy is demonstrated. 相似文献
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K. Zeil M. Baumann E. Beyreuther T. Burris-Mog T. E. Cowan W. Enghardt L. Karsch S. D. Kraft L. Laschinsky J. Metzkes D. Naumburger M. Oppelt C. Richter R. Sauerbrey M. Schürer U. Schramm J. Pawelke 《Applied physics. B, Lasers and optics》2013,110(4):437-444
Proton beams are a promising tool for the improvement of radiotherapy of cancer, and compact laser-driven proton radiation (LDPR) is discussed as an alternative to established large-scale technology facilitating wider clinical use. Yet, clinical use of LDPR requires substantial development in reliable beam generation and transport, but also in dosimetric protocols as well as validation in radiobiological studies. Here, we present the first dose-controlled direct comparison of the radiobiological effectiveness of intense proton pulses from a laser-driven accelerator with conventionally generated continuous proton beams, demonstrating a first milestone in translational research. Controlled dose delivery, precisely online and offline monitored for each out of ~4,000 pulses, resulted in an unprecedented relative dose uncertainty of below 10 %, using approaches scalable to the next translational step toward radiotherapy application. 相似文献
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Kerstin Oppelt Uwe Monkowius Manfred Zabel Günther Knör 《Journal of organometallic chemistry》2011,696(10):2252-2258
The synthesis, structure, photophysics, and spectroscopic characterization of two novel organometallic rhodium and rhenium multichromophore photosensitizers carrying a central 2,2′-bipyridyl acceptor moiety are reported. Due to the presence of rigid phenylethynyl substituents in their 5,5′-position acting as intramolecular antenna groups, these compounds display perturbed excited state properties and a modified luminescence behaviour compared to the unsubstituted parent systems. The rhodium derivative is characterized by a weak blue-green intraligand (IL) phosphorescence occurring only at low temperatures. In the rhenium complex both a blue-green ligand-based luminescence and a red phosphorescence of metal-to-ligand charge transfer (MLCT) origin is observed at room temperature in solution. In rigid 77 K matrix the lowest-lying excited state levels approximate in energy and a structured luminescence band occurs which is ascribed to a ligand phosphorescence with admixed MLCT character. 相似文献
80.
P. G. T. Petersen A. M. Dubowitzki N. I. Krjutschkow H. R. Ambler S. Kagan T. C. Sutton J. Happel D. W. Robertson H. Tropsch W. J. Mattox S. Mischonsniky J. R. Branham M. Shepherd A. Luszczak H. Seebaum W. Oppelt W. Zwieg F. Kossendey M. P. Matuszak H. Kahle B. H. Wilsdon F. J. McConnell E. K. Gerling A. Grebel J. A. Shaw J. L. Tremblay 《Analytical and bioanalytical chemistry》1935,102(11-12):428-438