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Arvid Uhler 《Acta Mathematica》1929,53(1):131-180
Ohne Zusammenfassung 相似文献
3.
Improved Spectral Coverage and Fluorescence Quenching in Donor–acceptor Systems Involving Indolo[3‐2‐b]carbazole and Boron‐dipyrromethene or Diketopyrrolopyrrole
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Adis Khetubol Sven Van Snick Melissa L. Clark Eduard Fron Eduardo Coutiño‐González Arvid Cloet Koen Kennes Yuliar Firdaus Maarten Vlasselaer Volker Leen Wim Dehaen Mark Van der Auweraer 《Photochemistry and photobiology》2015,91(3):637-653
A novel π‐conjugated triad and a polymer incorporating indolo[3,2‐b]‐carbazole (ICZ) and 4,4‐difluoro‐4‐bora‐3a,4a‐diaza‐s‐indacene (BODIPY) were synthesized via a Sonogashira coupling. Compared to the parent BODIPY the absorption and fluorescence spectrum were for both compounds broader and redshifted. The redshift of the fluorescence and the decrease of the fluorescence quantum yield and decay time upon increasing solvent polarity were attributed to the formation of a partial charge‐transfer state. Upon excitation in the ICZ absorption band the ICZ fluorescence was quenched in both compounds mainly due to energy transfer to the BODIPY moiety. In a similar ICZ–π–DPP polymer (where DPP is diketopyrrolopyrrole), a smaller redshift of the absorption and fluorescence spectra compared to the parent DPP was observed. A less efficient quenching of the ICZ fluorescence in the ICZ–π–DPP polymer could be related to the unfavorable orientation of the transition dipoles of ICZ and DPP. The rate constant for energy transfer was for all compounds an order of magnitude smaller than predicted by Förster theory. While in a solid film of the triad a further redshift of the absorption maximum of nearly 100 nm was observed, no such shift was observed for the ICZ–π–BODIPY polymer. 相似文献
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David A. Naylor Arvid A. Schultz Stephen E. Bougerolle T. Alan Clark 《Mikrochimica acta》1988,95(1-6):289-293
A new method is described for eliminating channel spectra from data obtained with a high resolution Fourier transform spectrometer. 相似文献
8.
Waldemar M. Fischer Arvid Schmidt M. Rabinowitsch A. S. Fokin und I. A. Atanasiu 《Fresenius' Journal of Analytical Chemistry》1930,79(9):358-360
Ohne Zusammenfassung 相似文献
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Arvid Perego 《Mathematische Annalen》2010,346(2):367-391
The aim of this work is to show that the moduli space M
10 introduced by O’Grady is a 2-factorial variety. Namely, M
10 is the moduli space of semistable sheaves with Mukai vector v: = (2, 0, −2) in
Hev(X,\mathbbZ){H^{ev}(X,\mathbb{Z})} on a projective K3 surface X. As a corollary to our construction, we show that the Donaldson morphism gives a Hodge isometry between v^{v^{\perp}} (sublattice of the Mukai lattice of X) and its image in
H2 ([(M)\tilde]10, \mathbbZ){H^{2} (\widetilde{M}_{10}, \mathbb{Z})}, lattice with respect to the Beauville form of the 10-dimensional irreducible symplectic manifold [(M)\tilde]10{\widetilde{M}_{10}}, obtained as symplectic resolution of M
10. Similar results are shown for the moduli space M
6 introduced by O’Grady to produce its 6-dimensional example of irreducible symplectic variety. 相似文献