A comparative study on hydrogen interaction with defective graphene structures doped by transition metals

2014 ◽  
Vol 60 ◽  
pp. 104-111 ◽  
Author(s):  
R. Lotfi ◽  
Y. Saboohi
Keyword(s):  
Transition Metals ◽  
Comparative Study ◽  
Hydrogen Interaction ◽  
Defective Graphene ◽  
Graphene Structures

Comparative Study of Reduced and Sulfide Catalysts Based on Transition Metals in Conversion of CO and H2

2018 ◽  
Vol 59 (3) ◽  
pp. 311-319
Author(s):  
M. A. Kamorin ◽  
V. S. Dorokhov ◽  
E. A. Permyakov ◽  
O. L. Eliseev ◽  
A. L. Lapidus ◽  
...  
Keyword(s):  
Transition Metals ◽  
Comparative Study ◽  
Sulfide Catalysts

Structure and bonding in the neutral and anionic forms of dimethylglyoxime and its complexes

1980 ◽  
Vol 33 (7) ◽  
pp. 1519 ◽  
Author(s):  
CL Raston ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Transition Metals ◽  
Comparative Study ◽  
Crystal Structures ◽  
Sodium Salt ◽  
Triclinic Space Group ◽  
Space Group ◽  
Structure And Bonding

In order to permit a comparative study of the structure and bonding behaviour of dimethylglyoxime in its neutral and monoanionic forms, both 'free' and complexed to transition metals, redeterminations of the crystal structures of dimethylglyoxime, dmgH2, and the complexes Cu(dmgH2)Cl2 and Cu(dmgH2)Br2 have been carried out, together with an initial determination of the structure of the hydrated sodium salt Na2(dmg),8H2O. Crystals of dmgH2 are triclinic, space group Pī, a 6.078(3), b 6.319(3), c 4.492(2) Ǻ, α 122.69(3), β 91.71(4), γ 77.72(4)°, Z 1 the structure was refined to a residual of 0.049 for 748 'observed' reflections. Crystals of Na2(dmg),8H2O are monoclinic, P21/c, a 11.317(7), b 12.995(7), c 4.901(4) Ǻ, β 100.55(5)°, Z 2, the structure being refined to a residual of 0.040 for 942 ?observed? reflections. Crystals of Cu(dmgH2)Cl2 are triclinic, Pī, a 8.163(4), b 8.109(3), c 7.701(2) Ǻ, α 110.88(3), β 101.31(3), γ 108.04(3)°, Z 2; for the isomorphous bromide a 8.628(3), b 8.276(4), c 7.757(2) Ǻ, α 111.18(3), β 101.02(3), γ 108.55(3)°. The two structures were refined to residuals of 0.052 and 0.045 for 964 and 1597 'observed' reflections respectively.

Possible Mechanism of the 30–100 Picoseconds Fast and Efficient Photoluminescence From nc-Si/a-SiO2Doped with Transition Metals

1996 ◽  
Vol 452 ◽  
Author(s):  
S. Veprek ◽  
Th. Wirschem ◽  
J. Dian ◽  
S. Perná ◽  
R. Merica ◽  
...  
Keyword(s):  
Thin Films ◽  
Energy Transfer ◽  
Transition Metals ◽  
Comparative Study ◽  
Silicon Nanocrystals ◽  
Light Emission ◽  
Uv Light ◽  
Charge Carriers ◽  
Radiative Center ◽  
Insight Into

AbstractThe nc-Si/a-SiO2composite thin films doped with tungsten show very fast and efficient photoluminescence (PL). In order to obtain insight into the PL mechanism we have performed a comparative study with other metals. The results lend support to the suggested mechanism which includes the photogeneration of charge carriers due to efficient absorption of the excitation UV light in the silicon nanocrystals followed by energy transfer to the Wn+radiative center from which the light emission occurs.

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