Europium-doped LaF3nanocrystals with organic 9-oxidophenalenone capping ligands that display visible light excitable steady-state blue and time-delayed red emission

2015 ◽  
Vol 44 (7) ◽  
pp. 3082-3091 ◽  
Author(s):  
Mir Irfanullah ◽  
Dharmendar Kumar Sharma ◽  
Ramya Chulliyil ◽  
Arindam Chowdhury
Keyword(s):  
Steady State ◽  
Visible Light ◽  
Red Emission ◽  
Emission Properties ◽  
Capping Ligands

Visible light excitable 9-oxidophenalenone-coated LaF3:Eu NCs display steady-state blue and time-delayed red emission; capping ligands act as probes to reveal three different Eu3+sites with distinct emission properties.

scholarly journals Unprecedented Coordination-Induced Bright Red Emission from Group 12 Metal-Bound Triarylazoimidazoles

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1739
Author(s):  
Artyom A. Astafiev ◽  
Olga V. Repina ◽  
Boris S. Tupertsev ◽  
Alexey A. Nazarov ◽  
Maria R. Gonchar ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Complexes ◽  
Scientific Literature ◽  
Photo Luminescence ◽  
Red Emission ◽  
The Past ◽  
Highly Efficient ◽  
Luminescence Emission ◽  
New Family ◽  
Group 12

Arylazoimidazoles are important dyes which were intensively studied in the past. In contrast, triarylazoimidazoles (derivatives which carry aryl substituents at the imidazole core) received almost no attention in the scientific literature. Here, we report a new family of simple and easily accessible triarylazoimidazole-group 12 metal complexes, which feature highly efficient photo-luminescence emission (Φ up to  0.44). Novel compounds exhibit bright red emission in solution, which could be excited with a visible light.

A Highly Luminescent Europium Complex Showing Visible-Light-Sensitized Red Emission: Direct Observation of the Singlet Pathway

2004 ◽  
Vol 43 (38) ◽  
pp. 5010-5013 ◽  
Author(s):  
Chi Yang ◽  
Li-Min Fu ◽  
Yuan Wang ◽  
Jian-Ping Zhang ◽  
Wing-Tak Wong ◽  
...  
Keyword(s):  
Visible Light ◽  
Direct Observation ◽  
Europium Complex ◽  
Red Emission

scholarly journals Onium salts improve the kinetics of photopolymerization of acrylate activated with visible light

RSC Advances ◽  
2020 ◽  
Vol 10 (42) ◽  
pp. 24817-24829 ◽  
Author(s):  
Janina Kabatc ◽  
Katarzyna Iwińska ◽  
Alicja Balcerak ◽  
Dominika Kwiatkowska ◽  
Agnieszka Skotnicka ◽  
...  
Keyword(s):  
Steady State ◽  
Visible Light ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Nanosecond Laser ◽  
Chemical Mechanisms ◽  
Onium Salts ◽  
Nanosecond Laser Flash Photolysis ◽  
Kinetics Of

The chemical mechanisms were investigated by steady state photolysis and nanosecond laser flash photolysis experiments. A mechanism for initiating polymerization using both onium salts is proposed here.

Biomimetische Photosysteme zur sakrifiziellen Wasserreduktion / Novel Biomimetic Systems for Visible Light Induced Water Reduction

1993 ◽  
Vol 48 (3) ◽  
pp. 369-386 ◽  
Author(s):  
Stefan Boßmann ◽  
Heinz Dürr ◽  
Eduard Mayer
Keyword(s):  
Steady State ◽  
Visible Light ◽  
Physical Model ◽  
Photochemical Reaction ◽  
Model Systems ◽  
Luminescence Spectroscopy ◽  
Quantum Yields ◽  
Biomimetic Systems ◽  
State Luminescence

Novel microheterogeneous systems for the direct photoreduction of water using visible light in analogy to the photochemical reaction center of Rhodopseudomonas viridis are described in detail. These physical model systems for photosynthesis feature the recently synthesized bisheteroleptic metal complexes [Ru(bpy)2(PP)]Cl2, [Ru(bpy)2(PPB)]Cl2, [Ru(bpy)2(PPB-pCl)]Cl2 and [Ru(bpy)3]Cl2, adsorbed on a negatively charged SiO2—TiO2-colloid, the zwitterionic electron relay PVS and a long-term stable and highly efficient TiO2—Pt-“antenna” catalyst as well as TEOA as sacrificial electron donor.Evidence for the directed absorption of the sensitizers on the SiO2—TiO2-colloid is taken from UV-VIS-measurements, steady-state luminescence-spectroscopy and the quantum yields for PVS-reduction.The hydrogen production in the presence of the SiO2—TiO2-colloid is clearly enhanced and proofs the validity of the underlying concept of physical model systems for photosynthesis.

Inverse Methods for Design and Control of Thermal Systems: Validation in a 2-D Visible Light Enclosure

2003 ◽  
Author(s):  
Mirko Gamba ◽  
Trey Pavy ◽  
John R. Howell
Keyword(s):  
Heat Transfer ◽  
Steady State ◽  
Radiative Transfer ◽  
Visible Light ◽  
Thermal Inertia ◽  
Inverse Methods ◽  
Inverse Design ◽  
Thermal Systems ◽  
And Control ◽  
Low Capacitance

Inverse methods have recently been introduced and applied to the design and control of thermal systems, particularly to systems where radiative transfer is the main heat transfer mode. The results of the steady state design of a representative radiative system using inverse methods have been experimentally validated on a modeled physical system. Few experiments have been developed to validate radiative transfer calculations even in simple systems. This is because it is difficult to separate other modes of energy transfer from radiative transfer, and, in transient systems, thermal inertia effects often mask the precise measurement of radiative effects. The present study is a continuation of the earlier validation work, performed to further study and eventually validate the inverse design and control methods by modeling and designing a simplified physical thermal system. A main focus of the present study is to exploit the similarities between thermal radiative systems lacking thermal inertia and visible light systems. Because of the absence of thermal capacitance, the response of a visible light system depends intrinsically on the state of the light source. The present study considers the inverse design of a newly developed experimental apparatus designed to simulate a low capacitance, two-dimensional radiative enclosure. The apparatus relies on the direct analogy between visible light and radiative heat transfer in a cold, low capacitance system where conduction and convection are suppressed. The system is designed so that both steady state and transient conditions can be achieved. The enclosure is equipped with individually controlled low-power lamps as the source of radiant flux, and these mimic radiant heaters in a real system. The design surface is instrumented with light detectors so that the intensity of the illumination on this surface can be quantified and eventually compared with the design goal. This paper illustrates the characteristics and capabilities of the experimental setup, along with the validity of inverse methods for steady state inverse design of the enclosure to achieve specified conditions on the design surface and sequent validation of the results on the experimental system.

EMI Series Mechanistic Investigation of a Visible Light Mediated Dehalogenation/Cyclisation Reaction using Iron(III), Iridium(III) and Ruthenium(II) Photosensitizers

2021 ◽  
Author(s):  
Akin Aydogan ◽  
Rachel Bangle ◽  
Simon De Kreijger ◽  
John Dickenson ◽  
Michael L Singleton ◽  
...  
Keyword(s):  
Steady State ◽  
Visible Light ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Time Resolved ◽  
Femtosecond Transient Absorption ◽  
Mechanistic Investigation ◽  
Femtosecond Transient Absorption Spectroscopy ◽  
Visible Light Driven ◽  
Time Resolved Infrared Spectroscopy

The mechanism of a visible light-driven dehalogenation/cyclization reaction was investigated using ruthenium(II), iridium(III) and iron(III) photosensitizers by means of steady-state photoluminescence, time-resolved infrared spectroscopy, and nanosecond/femtosecond transient absorption spectroscopy. The...

Incorporation of hexacyanidoferrate(iii) ion in photoluminescent trimetallic Eu(3-pyridone)[Co1−xFex(CN)6] chains exhibiting tunable visible light absorption and emission properties

CrystEngComm ◽  
2018 ◽  
Vol 20 (38) ◽  
pp. 5695-5706 ◽  
Author(s):  
Szymon Chorazy ◽  
Jakub J. Zakrzewski ◽  
Junhao Wang ◽  
Shin-ichi Ohkoshi ◽  
Barbara Sieklucka
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
Absorption And Emission ◽  
Emission Properties

Tuning of absorption and photoluminescence is achieved in trimetallic EuCoFe cyanido-bridged frameworks through the gradual replacement of [CoIII(CN)6]3− with [FeIII(CN)6]3−.

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