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101.
Handzy DO Bauer W Daffin FC Gaff SJ Gelbke CK Glasmacher T Gualtieri E Hannuschke S Huang MJ Kunde GJ Lacey R Li T Lisa MA Llope WJ Lynch WG Martin L Montoya CP Pak R Peaslee GF Pratt S Schwarz C Stone N Tsang MB Vander Molen AM Westfall GD Yee J Yennello SJ 《Physical review letters》1995,75(16):2916-2919
102.
J. Lipkowski A. Grabowska J. Waluk G. Calestani B. A. Hess Jr. 《Journal of chemical crystallography》1992,22(5):563-572
The crystal structures of two molecules undergoing fast intramolecular excited state proton transfer (2,2-bipyridyl-3,3-diol, BP(OH)2, and 2,2-bipyridyl-3-ol, BP(OH)) are reported and compared with the results ofab initio and molecular mechanics calculations. Strong intramolecular hydrogen bonding is observed in both cases. The pyridyl rings are coplanar in BP(OH)2, whereas in BP(OH) they form an angle of 3.7°.Dedicated to Prof. R. Zahradnik on the occasion of his birthday. 相似文献
103.
104.
Measurements of fluorescence quantum yield D/oD of Na-fluorescein (donor; D) versus concentration of rhodamine B (acceptor; A) in viscous solutions have been carried out. The donor concentration in these solutions was as follows:C
D=2·10–2
M (system I), 1.5·10–2
M (II), 10–2
M (III), 3·10–3
M (IV), and 5·10–5
M (V). The experimental results have been compared with current theories of nonradiative electronic energy transfer (NEET). In the case of very strong migration (systems I, II, and III), a significant influence of correlations (between configurations of D and A molecules in the surroundings of successively excited donors) on quantum yield D/oD has been determined. Experimental values have been found to be clearly higher in comparison with those predicted theoretically. The influence of possible factors on the decrease in the effectiveness of excitation energy transport to traps-acceptors in systems of very strong migration has been discussed.Dedicated to Professor A. Kawski on the occasion of his 65th birthday. 相似文献
105.
106.
Janusz Trawczyski Andrzej Kubacki Józef Wrzyszcz Mirosaw Zawadzki Hanna Grabowska Wodzimierz Mita 《Reaction Kinetics and Catalysis Letters》2002,76(2):259-264
Surface behavior of zinc aluminates prepared according to three different methods has been investigated by TPD NH3 and IR spectroscopy and compared with properties of alumina. It was stated that zinc affects the strength and distribution of acidic sites as well as HDS activity of Mo (CoMo) catalysts supported on Zn doped Al2O3. 相似文献
107.
Grabowska Katarzyna Grabowski Janusz Urbaski Pawe 《Annals of Global Analysis and Geometry》2003,24(2):101-130
Natural affine analogs of Lie brackets on affine bundles are studied.In particular, a close relation to Lie algebroids and a duality withcertain affine analog of Poisson structure is established as well asaffine versions of complete lifts and Cartan exterior calculi. 相似文献
108.
Zegers RG van Den Berg AM Brandenburg S Fleurot FR Fujiwara M Guillot J Hannen VM Harakeh MN Laurent H van Der Schaaf K van Der Werf SY Willis A Wilschut HW 《Physical review letters》2000,84(17):3779-3782
The (nat)Pb(3He,tp) reaction at E(3He) = 177 MeV was studied to identify 2Planck's over 2piomega isovector monopole strength in Bi isotopes. Monopole strength was found in the region -45
相似文献
109.
An analogy is stressed between the order-parameter symmetries of the two-dimensional d-pairing wave superconductors and of liquid-crystal mesophases formed from achiral bent-shaped molecules. It leads to a definition of a class of liquid-crystal states which are the analogs of the unconventional superconducting states, and are characterized by a loss of discrete symmetry operations of the parent state. 相似文献
110.