ChemInform Abstract: Spin State Switching of Metal Complexes by Visible Light or Hard X-Rays

ChemInform ◽  
2016 ◽  
Vol 47 (44) ◽  
Author(s):  
Daniel Unruh ◽  
Patrick Homenya ◽  
Manish Kumar ◽  
Ralf Sindelar ◽  
Yann Garcia ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Complexes ◽  
Spin State ◽  
X Rays ◽  
State Switching

scholarly journals Spin state switching of metal complexes by visible light or hard X-rays

2016 ◽  
Vol 45 (36) ◽  
pp. 14008-14018 ◽  
Author(s):  
Daniel Unruh ◽  
Patrick Homenya ◽  
Manish Kumar ◽  
Ralf Sindelar ◽  
Yann Garcia ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Complexes ◽  
Spin State ◽  
Coordination Compounds ◽  
Spin Crossover ◽  
X Rays ◽  
Iron Compounds ◽  
Electromagnetic Irradiation ◽  
State Switching

Different kinds of stimuli to induce spin crossover in iron compounds are covered, focusing on electromagnetic irradiation-induced spin state switching phenomena in mono- as well as multinuclear coordination compounds.

scholarly journals Light-controlled spin-state-switching rearrangements of transition metal complexes with photochromic ligands

2017 ◽  
Vol 89 (8) ◽  
pp. 985-1005 ◽  
Author(s):  
Vladimir I. Minkin ◽  
Andrey G. Starikov ◽  
Alyona A. Starikova
Keyword(s):  
Magnetic Properties ◽  
Transition Metal ◽  
Dft Calculations ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Spin State ◽  
Spin Crossover ◽  
State Switching ◽  
Configurational Isomerization

Abstract New families of the transition metal complexes with photochromic ligands manifesting photoswitchable magnetic properties determined by the light-induced spin-crossover and configurational isomerization rearrangements are theoretically designed by means of DFT calculations of electromeric forms of the complexes.

Studies of metaphase chromosomes in the scanning transmission x-ray microscope: Image fidelity, radiation damage and specimen preparation

1992 ◽  
Vol 50 (2) ◽  
pp. 1038-1039
Author(s):  
Shawn Williams ◽  
Xiaodong Zhang ◽  
Susan Lamm ◽  
Jack Van’t Hof
Keyword(s):  
Visible Light ◽  
Radiation Damage ◽  
Cross Section ◽  
Imaging Techniques ◽  
Dose Range ◽  
Specimen Preparation ◽  
X Rays ◽  
Metaphase Chromosomes ◽  
X Ray ◽  
Scanning Transmission

The Scanning Transmission X-ray Microscope (STXM) is well suited for investigating metaphase chromosome structure. The absorption cross-section of soft x-rays having energies between the carbon and oxygen K edges (284 - 531 eV) is 6 - 9.5 times greater for organic specimens than for water, which permits one to examine unstained, wet biological specimens with resolution superior to that attainable using visible light. The attenuation length of the x-rays is suitable for imaging micron thick specimens without sectioning. This large difference in cross-section yields good specimen contrast, so that fewer soft x-rays than electrons are required to image wet biological specimens at a given resolution. But most imaging techniques delivering better resolution than visible light produce radiation damage. Soft x-rays are known to be very effective in damaging biological specimens. The STXM is constructed to minimize specimen dose, but it is important to measure the actual damage induced as a function of dose in order to determine the dose range within which radiation damage does not compromise image quality.

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.

Enantioselective [2+2] Photocycloaddition Reactions of Enones and Olefins with Visible Light Mediated by N , N ′‐Dioxide–Metal Complexes

2018 ◽  
Vol 24 (72) ◽  
pp. 19361-19367 ◽  
Author(s):  
Han Yu ◽  
Shunxi Dong ◽  
Qian Yao ◽  
Long Chen ◽  
Dong Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Metal Complexes
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