Synthesis and photophysical properties of ruthenium(ii) polyimine complexes decorated with flavin

2018 ◽  
Vol 20 (25) ◽  
pp. 17504-17516 ◽  
Author(s):  
Huimin Guo ◽  
Lijuan Zhu ◽  
Can Dang ◽  
Jianzhang Zhao ◽  
Bernhard Dick
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Light Absorption ◽  
Photophysical Properties ◽  
Triplet Excited State ◽  
Visible Light Absorption ◽  
First Time

Phosphorescent emission from a flavin localized triplet excited state (3IL) is observed for the first time in a flavin decorated tris(dipyridine) Ru(ii) complex with strong visible light absorption.

Switching of the triplet excited state of rhodamine-C60 dyads

2014 ◽  
Vol 50 (98) ◽  
pp. 15627-15630 ◽  
Author(s):  
Fen Wang ◽  
Xiaoneng Cui ◽  
Zhangrong Lou ◽  
Jianzhang Zhao ◽  
Ming Bao ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Triplet State ◽  
Light Absorption ◽  
Triplet Excited State ◽  
Visible Light Absorption ◽  
State Production

Rhodamine was used as an acid-responsive moiety for switching of the triplet state production and visible light absorption of rhodamine-C60 dyads.

scholarly journals Enhancing the Visible-Light Absorption and Excited-State Properties of Cu(I) MLCT Excited States

2018 ◽  
Vol 57 (4) ◽  
pp. 2296-2307 ◽  
Author(s):  
Sofia Garakyaraghi ◽  
Catherine E. McCusker ◽  
Saba Khan ◽  
Petr Koutnik ◽  
Anh Thy Bui ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Excited States ◽  
Light Absorption ◽  
Visible Light Absorption

Excited state electron transfer after visible light absorption by the Co(i) state of vitamin B12

2014 ◽  
Vol 50 (87) ◽  
pp. 13304-13306 ◽  
Author(s):  
Darren Achey ◽  
Erinn C. Brigham ◽  
Brian N. DiMarco ◽  
Gerald J. Meyer
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Visible Light ◽  
Vitamin B12 ◽  
Light Absorption ◽  
Excitation Wavelength ◽  
Vitamin B ◽  
Visible Light Absorption ◽  
State Electron

The Co(i) form of vitamin B12 was found to undergo excitation wavelength-dependent excited state electron transfer to TiO2.

scholarly journals Improved Visible Light Absorption of Potent Iridium(III) Photo-oxidants for Excited-State Electron Transfer Chemistry

2020 ◽  
Vol 142 (6) ◽  
pp. 2732-2737 ◽  
Author(s):  
Robin Bevernaegie ◽  
Sara A. M. Wehlin ◽  
Eric J. Piechota ◽  
Michael Abraham ◽  
Christian Philouze ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Visible Light ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
State Electron

Modification of P25 titania in presence of hydrazine for Staphylococcus aureus inactivation

2019 ◽  
Vol 12 (03) ◽  
pp. 1950030
Author(s):  
Bhupendra Joshi ◽  
Soo Wohn Lee
Keyword(s):  
Staphylococcus Aureus ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Light Absorption ◽  
Nitrogen Doping ◽  
Sonochemical Method ◽  
Visible Light Absorption ◽  
Cotton Ball ◽  
Microwave Assisted ◽  
First Time

Titania and its polymorphs are one of the most studied semiconductor photocatalysts. Herein, the P25 titania was used as a precursor to modify the phase and structure with microwave-assisted hydrothermal and sonochemical methods in presence of alkaline hydrazine. The outcome results show the cotton ball structure titanate composite phases (nanotubes, nanosheets and nanoparticles) and monoclinic titanate phase (TiO2-B) with microwave-assisted hydrothermal method and sonochemical method, respectively. The nitrogen doping was confirmed by FTIR and DRS in modified TiO2. And some visible light absorption was observed in modified TiO2 due to the nitrogen doping. The composite phase titanate having cotton ball structure was found to be efficient for methicillin-resistant superbug Staphylococcus aureus (MRSA) inactivation. Herein, we also reported the submicron TiO2-B sword like morphology fabricated by sonochemical method for the first time in presence of alkaline hydrazine.

Room-Temperature Long-Lived 3IL Excited State of Rhodamine in an NN PtII Bis(acetylide) Complex with Intense Visible-Light Absorption

2011 ◽  
Vol 2011 (29) ◽  
pp. 4527-4533 ◽  
Author(s):  
Ling Huang ◽  
Le Zeng ◽  
Huimin Guo ◽  
Wanhua Wu ◽  
Wenting Wu ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Light Absorption ◽  
Room Temperature ◽  
Visible Light Absorption

The singlet excited state of BODIPY promoted aerobic cross-dehydrogenative-coupling reactions under visible light

2015 ◽  
Vol 51 (56) ◽  
pp. 11256-11259 ◽  
Author(s):  
Xu-Zhe Wang ◽  
Qing-Yuan Meng ◽  
Jian-Ji Zhong ◽  
Xue-Wang Gao ◽  
Tao Lei ◽  
...  
Keyword(s):  
Excited State ◽  
Visible Light ◽  
Bond Activation ◽  
Coupling Reactions ◽  
Singlet Excited State ◽  
Triplet Excited State ◽  
Dehydrogenative Coupling ◽  
First Time

We disclose for the first time that the singlet excited state (1PS*) of BODIPY rather than triplet excited state (3PS*) can drive C–H bond activation to form C–C and C–P bonds smoothly upon irradiation by visible light.

Impact of Rutile Fraction on TiO2 Visible-Light Absorption and Visible-Light-Induced Photocatalytic Activity

2018 ◽  
Author(s):  
David Maria Tobaldi ◽  
Luc Lajaunie ◽  
ana caetano ◽  
nejc rozman ◽  
Maria Paula Seabra ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Solid Phase ◽  
Diffraction Method ◽  
Band Alignment ◽  
Quantitative Phase Analysis ◽  
Transmission Microscopy ◽  
Visible Light Absorption ◽  
X Ray

<div>Titanium dioxide is by far the most utilised semiconductor material for photocatalytic applications. Still, it is transparent to visible-light. Recently, it has been proved that a type-II band alignment for the rutile−anatase mixture would improve its visible-light absorption.</div><div>In this research paper we thoroughly characterised the real crystalline and amorphous phases of synthesised titanias – thermally treated at different temperatures to get distinct ratios of anatase-rutile-amorphous fraction – as well as that of three commercially available photocatalytic nano-TiO2. </div><div>The structural characterisation was done via advanced X-ray diffraction method, namely the Rietveld-RIR method, to attain a full quantitative phase analysis of the specimens. The microstructure was also investigated via an advanced X-ray method, the whole powder pattern modelling. These methods were validated combining advanced aberration-corrected scanning transmission microscopy and high-resolution electron energy-loss spectroscopy. The photocatalytic activity was assessed in the liquid- and gas-solid phase (employing rhodamine B and 4-chlorophenol, and isopropanol, respectively, as the organic substances to degrade) using a light source irradiating exclusively in the visible-range.</div><div>Optical spectroscopy showed that even a small fraction of rutile (2 wt%) is able to shift to lower energies the apparent optical band gap of an anatase-rutile mixed phase. But is this enough to attain a real photocatalytic activity promoted by merely visible-light?</div><div>We tried to give a reply to that question.</div><div>Photocatalytic activity results in the liquid-solid phase showed that a high surface hydroxylation led to specimen with superior visible light-induced catalytic activity (i.e. dye and ligand-to-metal charge transfer complexes sensitisation effects). That is: not photocatalysis <i>sensu-strictu</i>.</div><div>On the other hand, the gas-solid phase results showed that a higher amount of the rutile fraction (around 10 wt%), together with less recombination of the charge carriers, were more effective for an actual photocatalytic oxidation of isopropanol.</div>

Improving Performances of Oxide Phototransistors Using a Mechano-Chemically Treated Porous Structure as The Visible Light Absorption Layer

2019 ◽  
pp. 447
Author(s):  
I Sak Lee ◽  
Bennet Nii Akwei Brown ◽  
Dongwoo Kim ◽  
Sujin Jung ◽  
Byung Ha Kang ◽  
...  
Keyword(s):  
Visible Light ◽  
Porous Structure ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
Absorption Layer ◽  
Chemically Treated
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