Steady-state and time-resolved spectroscopy of porous silicon

1996 ◽  
Vol 70 (1-6) ◽  
pp. 364-376 ◽  
Author(s):  
S.V. Gaponenko ◽  
E.P. Petrov ◽  
U. Woggon ◽  
O. Wind ◽  
C. Klingshirn ◽  
...  
Keyword(s):  
Steady State ◽  
Porous Silicon ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Spectral and Photoprototropic Characteristics of 4-Aminobiphenyl in β-Cyclodextrin

2004 ◽  
Vol 69 (4) ◽  
pp. 748-758 ◽  
Author(s):  
Israel V. Muthu Vijayan Enoch ◽  
Meenakshisundaram Swaminathan
Keyword(s):  
Excited State ◽  
Steady State ◽  
Fluorescence Spectroscopy ◽  
Inclusion Complex ◽  
Ground State ◽  
Time Resolved Fluorescence ◽  
Neutral Form ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

The photophysical and photoprototropic behaviour of 4-aminobiphenyl (4ABP) in aqueous β-cyclodextrin (β-CDx) solution has been investigated using steady-state and time-resolved fluorescence spectroscopy. Fluorescence of the neutral form of 4ABP is enhanced due to the formation of a 1:1 complex with β-CDx. The formation of this complex has been confirmed by time-resolved spectroscopy. In the presence of β-CDx, no change was observed in the ground state pKa value but the excited state pKa value changed. Based on its photophysical and photoprototropic characteristics in β-CDx, the structure of the 1:1 inclusion complex is proposed.

Comparative photophysical investigation of doubly-emissive photochromic-fluorescent diarylethenes

2018 ◽  
Vol 20 (4) ◽  
pp. 2470-2479 ◽  
Author(s):  
E. Barrez ◽  
G. Laurent ◽  
C. Pavageau ◽  
M. Sliwa ◽  
R. Métivier
Keyword(s):  
Steady State ◽  
Theoretical Calculations ◽  
Fluorescence Properties ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Diarylethene molecules showing photochromism and fluorescence properties in both open and closed forms, associated with two different emission colors, have been investigated by steady-state and time-resolved spectroscopy, combined with theoretical calculations.

STEADY STATE AND TIME RESOLVED SPECTROSCOPIC STUDY OF CONFINED DYE INSIDE γ-CD IN PRESENCE OF Au NANOPARTICLES

2011 ◽  
Vol 10 (04n05) ◽  
pp. 867-871
Author(s):  
TAPASI SEN ◽  
AMITAVA PATRA
Keyword(s):  
Steady State ◽  
Spectroscopic Study ◽  
Au Nanoparticles ◽  
Light Harvesting ◽  
Photophysical Properties ◽  
Photoluminescence Quenching ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Potential Applications

The photophysical properties of the confined dye inside the γ-CD in presence of Au nanoparticles have been studied by steady state and time resolved spectroscopy. It is found that the photoluminescence quenching of C480 dye increases from 26% to 49% due to confinement of dye inside γ-CD. The designing of such new optical based materials having coumarin 480 dye inside the γ-CD in presence of Au nanoparticles may have potential applications for light harvesting system.

Localised and delocalised excitons in star-like squaraine homo- and heterotrimers

2016 ◽  
Vol 18 (4) ◽  
pp. 2646-2657 ◽  
Author(s):  
Harald Ceymann ◽  
Moritz Balkenhohl ◽  
Alexander Schmiedel ◽  
Marco Holzapfel ◽  
Christoph Lambert
Keyword(s):  
Steady State ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Steady state and time resolved spectroscopy shows localisation and delocalisation of excitons in star-like squaraine trimers which are formed by the combination of two different squaraines.

Investigation of Chemical Adsorbate Effects on Blue and Red Emitting Porous Silicon Samples

1994 ◽  
Vol 358 ◽  
Author(s):  
Julie M. Rehm ◽  
George L. McLendon ◽  
Leonid Tsybeskov ◽  
Philippe M. Fauchet
Keyword(s):  
Steady State ◽  
Porous Silicon ◽  
Surface Passivation ◽  
Chemical Exposure ◽  
Nonradiative Recombination ◽  
Photoluminescence Intensity ◽  
Time Resolved ◽  
Optical Effects ◽  
Solvent Molecules ◽  
Time Resolved Photoluminescence

ABSTRACTWe have investigated the sensitivity of blue (PLmax = 480 nm) and red (PLmax = 660 nm) emitting porous silicon samples to various chemical adsorbates. Steady-state and time-resolved photoluminescence measurements and FTIR spectroscopy were employed to characterize the photophysical and optical effects induced by chemical exposure. The red samples, which are hydrogen terminated, exhibit quenching and recovery of photoluminescence intensity and broadening of the Si-Hx stretch bands upon exposure to liquid methanol. This behavior is attributed to the ability of the Si-Hx specie on the surface of the PSI to interact with the solvent molecules which temporarily traps the electrons and causes PL loss and Si-Hx broadening. The blue samples, which are oxygen terminated, display similar sensitivity to methanol. This sensitivity is attributed to the solvent's ability to change the surface passivation and thereby introduce competitive radiative and nonradiative recombination channels. The origin of the blue PL is discussed.

The photophysics of fac-[Re(CO)3(NN)(bpa)]+ complexes: a theoretical/experimental study

2014 ◽  
Vol 13 (8) ◽  
pp. 1213-1224 ◽  
Author(s):  
S. F. Sousa ◽  
R. N. Sampaio ◽  
N. M. Barbosa Neto ◽  
A. E. H. Machado ◽  
A. O. T. Patrocinio
Keyword(s):  
Experimental Study ◽  
Steady State ◽  
Theoretical Calculations ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Polypyridyl Ligand

The influence of the polypyridyl ligand on the photophysics of Re(i) tricarbonyl complexes was investigated by steady-state and time resolved spectroscopy as well as by theoretical calculations.

Cy3 in AOT Reverse Micelles I. Dimer Formation Revealed through Steady-State and Time-Resolved Spectroscopy

2011 ◽  
Vol 115 (31) ◽  
pp. 9576-9584 ◽  
Author(s):  
Jeffrey T. McPhee ◽  
Eric Scott ◽  
Nancy E. Levinger ◽  
Alan Van Orden
Keyword(s):  
Steady State ◽  
Reverse Micelles ◽  
Dimer Formation ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Aot Reverse Micelles
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