Stellar Aberration and Red Shift

1932 ◽  
Vol 75 ◽  
pp. 64 ◽  
Author(s):  
G. van Biesbroeck
Keyword(s):  
Red Shift ◽  
Stellar Aberration

The misunderstood Sagnac effect

2021 ◽  
Vol 34 (4) ◽  
pp. 480-485
Author(s):  
John-Erik Persson
Keyword(s):  
Doppler Effect ◽  
Order Effect ◽  
Second Order ◽  
Red Shift ◽  
Sagnac Effect ◽  
First Order ◽  
Pioneer Anomaly ◽  
The Doppler Effect ◽  
Stellar Aberration

The Sagnac effect of first order (in one-way light) is shown to explain the aberration observed in the very long base interferometry tests. This fact is also consistent with Sagnac’s results and with the observed stellar aberration. The Sagnac effect of second order (in two-way light) is shown to be real, but not observable, in the experiments that were done by Michelson and Morley. However, it is also shown that the same second order effect is observable in the Pioneer anomaly. The Doppler effect of second order is also demonstrated to explain the cosmic red shift, due to a radial ether wind.

scholarly journals Exciton Coupling and Conformational Changes Impacting the Excited State Properties of Metal Organic Frameworks

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4230
Author(s):  
Andreas Windischbacher ◽  
Luca Steiner ◽  
Ritesh Haldar ◽  
Christof Wöll ◽  
Egbert Zojer ◽  
...  
Keyword(s):  
Conformational Changes ◽  
Photophysical Properties ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Red Shift ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Exciton Coupling ◽  
Metal Organic ◽  
Crystalline Metal

In recent years, the photophysical properties of crystalline metal-organic frameworks (MOFs) have become increasingly relevant for their potential application in light-emitting devices, photovoltaics, nonlinear optics and sensing. The availability of high-quality experimental data for such systems makes them ideally suited for a validation of quantum mechanical simulations, aiming at an in-depth atomistic understanding of photophysical phenomena. Here we present a computational DFT study of the absorption and emission characteristics of a Zn-based surface-anchored metal-organic framework (Zn-SURMOF-2) containing anthracenedibenzoic acid (ADB) as linker. Combining band-structure and cluster-based simulations on ADB chromophores in various conformations and aggregation states, we are able to provide a detailed explanation of the experimentally observed photophysical properties of Zn-ADB SURMOF-2: The unexpected (weak) red-shift of the absorption maxima upon incorporating ADB chromophores into SURMOF-2 can be explained by a combination of excitonic coupling effects with conformational changes of the chromophores already in their ground state. As far as the unusually large red-shift of the emission of Zn-ADB SURMOF-2 is concerned, based on our simulations, we attribute it to a modification of the exciton coupling compared to conventional H-aggregates, which results from a relative slip of the centers of neighboring chromophores upon incorporation in Zn-ADB SURMOF-2.

scholarly journals DsbB elicits a red-shift of bound ubiquinone during the catalysis of DsbA oxidation. Vol. 279 (2004) 6761-6768

2004 ◽  
Vol 279 (23) ◽  
pp. 24906
Author(s):  
Kenji Inaba ◽  
Yoh-hei Takahashi ◽  
Nobutaka Fujieda ◽  
Kenji Kano ◽  
Hideto Miyoshi ◽  
...  
Keyword(s):  
Red Shift

Observation of an Unusually Large IR Red-Shift in an Unconventional S–H···S Hydrogen-Bond

2021 ◽  
Vol 12 (4) ◽  
pp. 1228-1235
Author(s):  
Kamal K. Mishra ◽  
Kshetrimayum Borish ◽  
Gulzar Singh ◽  
Prakash Panwaria ◽  
Surajit Metya ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Red Shift

scholarly journals HIRE: Hidden Inter-packet Red-shift Effect

2020 ◽  
Author(s):  
Francesco Ciaccia ◽  
Ivan Romero ◽  
Rene Serral-Gracia ◽  
Mario Nemirovsky
Keyword(s):  
Red Shift ◽  
Shift Effect

scholarly journals Red-shift of spectral sensitivity due to screening pigment migration in the eyes of a moth, Adoxophyes orana

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Aya Satoh ◽  
Finlay J. Stewart ◽  
Hisaharu Koshitaka ◽  
Hiroshi D. Akashi ◽  
Primož Pirih ◽  
...  
Keyword(s):  
Spectral Sensitivity ◽  
Red Shift ◽  
Adoxophyes Orana ◽  
Screening Pigment ◽  
Pigment Migration

Electronic Structure and Optical Properties of Non-Metals (N, F, P, Cl, S)-Doped Cubic NaTaO3 by Density Functional Theory

2009 ◽  
Vol 79-82 ◽  
pp. 1245-1248 ◽  
Author(s):  
Pei Lin Han ◽  
Xiao Jing Wang ◽  
Yan Hong Zhao ◽  
Chang He Tang
Keyword(s):  
Density Functional Theory ◽  
Optical Properties ◽  
Electronic Structure ◽  
Visible Light ◽  
Absorption Edge ◽  
Density Functional ◽  
Red Shift ◽  
Functional Theory ◽  
Photoactive Materials ◽  
Metal Doped

Electronic structure and optical properties of non-metals (N, S, F, P, Cl) -doped cubic NaTaO3 were investigated systematically by density functional theory (DFT). The results showed that the substitution of (N, S, P, Cl) for O in NaTaO3 was effective in narrowing the band-gap relative to the F-doped NaTaO3. The larger red shift of the absorption edge and the higher visible light absorption at about 520 nm were found for the (N and P)-doped NaTaO3. The excitation from the impurity states to the conduction band may account for the red shift of the absorption edge in an electron-deficiency non-metal doped NaTaO3. The obvious absorption in the visible light region for (N and P)-doped NaTaO3 provides an important guidance for the design and preparation of the visible light photoactive materials.

Tuning the Photophysical Properties of Cyclometalated Ir(III) Complexes by a Trifluoroacetyl Group

2012 ◽  
Vol 67 (3) ◽  
pp. 213-218 ◽  
Author(s):  
Bihai Tong ◽  
Jiayan Qiang ◽  
Qunbo Mei ◽  
Hengshan Wang ◽  
Qianfeng Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Electron Acceptor ◽  
Photophysical Properties ◽  
Red Shift ◽  
Luminescence Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Absorption And Luminescence Spectra ◽  
Homo Lumo

Four cationic Ir(III) complexes, [Ir(dpq)2(bpy)]PF6 (1), [Ir(dpq)2(phen)]PF6 (2), [Ir(tfapq)2- (bpy)]PF6 (3), and [Ir(tfapq)2(phen)]PF6 (4) (dpqH = 2,4-diphenylquinoline, tfapqH = 2-(4ʹ-trifluoroacetylphenyl)- 4-phenylquinoline, bpy = 2,2ʹ-bipyridine, phen = 1,10-phenanthroline) have been synthesized and fully characterized. The structure of 4 was also confirmed by single-crystal X-ray diffraction. The electron-acceptor character of the trifluoroacetyl unit leads to a reduced HOMO-LUMO gap and consequently a red-shift of the UV/Vis absorption and luminescence spectra. The solvophobic character of the trifluoroacetyl unit gives rise to a molecule assembly in solution.

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