Vibronic structure in the luminescence spectra of tetragonal d2 and d8 complexes analyzed by wavepacket dynamics on two-dimensional potential surfaces

PhysChemComm ◽  
2000 ◽  
Vol 3 (12) ◽  
pp. 64 ◽  
Author(s):  
Myriam Triest ◽  
Steve Masson ◽  
John K. Grey ◽  
Christian Reber
Keyword(s):  
Luminescence Spectra ◽  
Two Dimensional ◽  
Potential Surfaces ◽  
Vibronic Structure ◽  
Wavepacket Dynamics

scholarly journals Excited-State Distortions of Cyclometalated Ir(III) Complexes Determined from the Vibronic Structure in Luminescence Spectra

2007 ◽  
Vol 111 (17) ◽  
pp. 3256-3262 ◽  
Author(s):  
Xianghuai Wang ◽  
Jian Li ◽  
Mark E. Thompson ◽  
Jeffrey I. Zink
Keyword(s):  
Excited State ◽  
Luminescence Spectra ◽  
Vibronic Structure

scholarly journals Vibronic structure of photosynthetic pigments probed by polarized two-dimensional electronic spectroscopy andab initiocalculations

2019 ◽  
Vol 10 (35) ◽  
pp. 8143-8153 ◽  
Author(s):  
Yin Song ◽  
Alexander Schubert ◽  
Elizabeth Maret ◽  
Ryan K. Burdick ◽  
Barry D. Dunietz ◽  
...  
Keyword(s):  
Photosynthetic Pigments ◽  
State Of The Art ◽  
Electronic Spectroscopy ◽  
Two Dimensional ◽  
Vibronic Structure ◽  
Tddft Calculations ◽  
Photoexcited Dynamics

Using polarized 2D spectroscopy and state-of-the-art TDDFT calculations to uncover the vibronic structure of primary photosynthetic pigments and its effect on ultrafast photoexcited dynamics.

A Simple Method of Constructing Duct Models for the Electrolytic Tank

1957 ◽  
Vol 61 (563) ◽  
pp. 775-776
Author(s):  
J. F. Norbury ◽  
A. Platt
Keyword(s):  
Wind Tunnel ◽  
Potential Flow ◽  
Velocity Potential ◽  
Two Dimensional ◽  
Potential Surfaces ◽  
Simple Method ◽  
Water Line ◽  
Insulating Surfaces ◽  
Air Intake ◽  
Axis Of Symmetry

A problem which occurs frequently is that of choosing a suitable shape for a duct, such as a wind tunnel contraction or an air intake. Basically similar problems, involving potential flow fields, occur in other branches of engineering, particularly in electrical engineering, and the electrolytic tank is now established as a tool which may usefully be employed in their investigation. The use of the simple shallow tank is limited to those fields which can be treated as two-dimensional or axisymmetric, but many problems fall within these categories.In forming a duct model for the electrolytic tank the walls of the duct are represented by insulating surfaces, and electrodes are positioned to represent two suitable velocity potential surfaces up- and down-stream of the duct. To represent a sector of an axi-symmetric duct the base of the tank must be inclined at 3°-5° to the horizontal and the water line on the tank base then represents the axis of symmetry.

scholarly journals Exciton-plasmon polariton coupling and hot carrier generation in two-dimensional SiB semiconductors: a first-principles study

Nanophotonics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 337-349 ◽  
Author(s):  
Ali Ramazani ◽  
Farzaneh Shayeganfar ◽  
Jaafar Jalilian ◽  
Nicholas X. Fang
Keyword(s):  
Light Emission ◽  
Luminescence Spectra ◽  
Two Dimensional ◽  
Electron Hole ◽  
Strong Electron ◽  
Hot Carrier ◽  
2D Semiconductors ◽  
Plasmon Polaritons ◽  
Quantum Framework ◽  
External Strain

AbstractExciton (strong electron–hole interactions) and hot carriers (HCs) assisted by surface plasmon polaritons show promise to enhance the photoresponse of nanoelectronic and optoelectronic devices. In the current research, we develop a computational quantum framework to study the effect of coupled exciton and HCs on the photovoltaic energy distribution, scattering process, polarizability, and light emission of two-dimensional (2D) semiconductors. Using a stable 2D semiconductor (semihydrogenated SiB) as our example, we theoretically show that external strain and thermal effect on the SiB can lead to valley polarized plasmon quasiparticles and HC generation. Our results reveal that the electron–phonon and electron–electron (e–e) interactions characterize the correlation between the decay rate, scattering of excitons, and generation of HCs in 2D semiconductors. Moreover, phonon assisted luminescence spectra of SiB suggest that light emission can be enhanced by increasing strain and temperature. The polarized plasmon with strong coupling of electronic and photonics states in SiB makes it as a promising candidate for light harvesting, plasmonic photocurrent devices, and quantum information.

Temperature- and pressure-dependent luminescence spectroscopy on the trans-[ReO2(pyridine)4]+ complex — Analysis of vibronic structure, luminescence energies, and bonding characteristics

2004 ◽  
Vol 82 (6) ◽  
pp. 1083-1091 ◽  
Author(s):  
John K Grey ◽  
Ian S Butler ◽  
Christian Reber
Keyword(s):  
Molecular Structure ◽  
Low Temperature ◽  
Room Temperature ◽  
Complex Analysis ◽  
Variable Pressure ◽  
Luminescence Spectroscopy ◽  
Luminescence Spectra ◽  
Vibronic Structure ◽  
Temperature Spectra ◽  
Temperature And Pressure

Resolved vibronic structure in electronic spectra provides a detailed view into how molecular structure changes after absorption or emission of a photon. We report temperature- and pressure-dependent luminescence spectra of trans-[ReO2(pyridine)4]I. Low-temperature spectra reveal long vibronic progressions in the totally symmetric O=Re=O (907 cm–1) and Re-pyridine (211 cm–1) stretching modes, indicating large structural displacements along these normal coordinates. The luminescence band maximum is at ca. 15 500 cm–1. Room-temperature spectra are somewhat less-resolved; however, intervals closely matching the O=Re=O frequency (~870 cm–1) persist at higher temperatures. The variable pressure spectra exhibit distinct changes in the vibronic patterns, and luminescence energies decrease by 16 ± 2 cm–1/kbar (1 bar = 100 kPa). Low-temperature spectra are modeled using two-dimensional potential energy surfaces to represent the initial and final electronic states, from which the quantitative normal coordinate offsets can be determined. We then adapt this model to the room-temperature, pressure-dependent data where it is possible to determine how the offsets and other important spectroscopic parameters vary with the pressure-induced changes of the molecular structure. Key words: trans-[ReO2(pyridine)4]I, low-temperature luminescence spectroscopy, high-pressure luminescence spectroscopy, vibronic structure, emitting state distortions.

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