The First Step of the Oxidation of Elemental Sulfur: Crystal Structure of the Homopolyatomic Sulfur Radical Cation [S8 ].+

2017 ◽  
Vol 56 (28) ◽  
pp. 8281-8284 ◽  
Author(s):  
Janis Derendorf ◽  
Carsten Jenne ◽  
Mathias Keßler
Keyword(s):  
Crystal Structure ◽  
Radical Cation ◽  
Elemental Sulfur ◽  
Sulfur Radical

Luminescence Intensity Enhancement of Copper Doped Hydronium Alunite Synthesized under Hydrothermal Conditions Using Sulfates Solution

2014 ◽  
Vol 90 ◽  
pp. 127-132
Author(s):  
Yuichiro Kuroki ◽  
Takashi Hatsuse ◽  
Tomoichiro Okamoto ◽  
Masasuke Takata
Keyword(s):  
Crystal Structure ◽  
Luminescence Intensity ◽  
Single Phase ◽  
Elemental Sulfur ◽  
Nitrate Solution ◽  
Hydrothermal Condition ◽  
Copper Nitrate ◽  
Hydrothermal Conditions ◽  
Photoluminescence Peak ◽  
Blue Photoluminescence

A novel phosphor, copper doped hydronium alunite ((H3O)Al3(SO4)2(OH)6:Cu), exhibiting a blue photoluminescence peak at a wavelength of 420 nm was successfully synthesized from aluminum and copper sulfates solution under hydrothermal condition (240 °C, 60 min). The measurement of XRD revealed that the obtained products were single phase with a crystal structure of (H3O)Al3(SO4)2(OH)6. Luminescence intensity of (H3O)Al3(SO4)2(OH)6:Cu synthesized from sulfates solution was 6.2 times higher than that from an aluminum nitrate solution mixed with an elemental sulfur and a copper nitrate solution. The increase of luminescence intensity was resulted from an improvement of the crystallinity of (H3O)Al3(SO4)2(OH)6.

scholarly journals Crystal structure and physical properties of radical cation salt based on 4,5-ethylenedioxy-4′-iodotetrathiafulvalene (EDO-TTF-I) with iodine bonding ability

2018 ◽  
Vol 2 (4) ◽  
pp. 752-759 ◽  
Author(s):  
Yoshiaki Nakano ◽  
Yusuke Takahashi ◽  
Kohdai Ishida ◽  
Manabu Ishikawa ◽  
Hideki Yamochi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Physical Properties ◽  
Radical Cation ◽  
Radical Cation Salt ◽  
Molecular Arrangement

The radical cation salt of 4,5-ethylenedioxy-4′-iodotetrathiafulvalene possessing iodine bonding ability afforded the β′-type molecular arrangement in dimerized Mott insulating state.

Serendipitous isolation of a triazinone-based air stable organic radical: synthesis, crystal structure, and computation

2020 ◽  
Vol 44 (26) ◽  
pp. 10781-10785
Author(s):  
Vedichi Madhu ◽  
Arun Kumar Kanakati ◽  
Samar K. Das
Keyword(s):  
Crystal Structure ◽  
Radical Cation ◽  
Organic Radical ◽  
Radical Cation Salt ◽  
Isolation And Characterization

Here we report the synthesis, isolation, and characterization of a dication salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one {12+(PF6)22−·2H2O1(PF6)2·2H2O}, and its radical cation salt, namely 4,6-bis(4,4′-bipyridinium)-1,3,5-triazin-2-one (1+˙PF6−1˙PF6).

Photochemical Nitration by Tetranitromethane. XVII. The Regiochemistry of Adduct Formation in the Photochemical Reaction of 1-Methylnaphthalene and Tetranitromethane

1994 ◽  
Vol 47 (8) ◽  
pp. 1591 ◽  
Author(s):  
JL Calvert ◽  
L Eberson ◽  
MP Hartshorn ◽  
n Maclaga ◽  
WT Robinson
Keyword(s):  
Crystal Structure ◽  
Charge Transfer ◽  
Radical Cation ◽  
Photochemical Reaction ◽  
Charge Transfer Complex ◽  
Adduct Formation ◽  
X Ray ◽  
Analogous Manner ◽  
Structure Determinations ◽  
Ion Recombination

Photolysis of the 1-methylnaphthalene/tetranitromethane charge-transfer complex yields the triad of 1-methylnaphthalene radical cation, nitrogen dioxide and trinitromethanide ion. Recombination of this triad gives predominantly 4-methyl-t-2-nitro-r-1-trinitromethyl-1,2- dihydronaphthalene (1), the epimeric 1-methyl-1-nitro-4-trinitromethyl-1,4-dihydronaphtha-lenes (2) and (3), 8-methyl-c-4-trinitromethyl-1,4-dihydronaphthalen-r-l-ol (4), nitro cyclo -adduct (5), 8-methyl-c-4-trinitromethyl-1,4-dihydronaphthalen-r-l-ol (6), hydroxy cyclo-adduct (7) and 4-methyl-t-1-trinitromethyl-1,2-dihydronaphthalen-r-2-ol (8). Adducts (1)- (3), (5), (7) and (8) are formed by attack of the trinitromethanide ion at C4 of the 1-methylnaphthalene radical cation, while adducts (4) and (6) are formed by corresponding attack at C5. Adduct (1) undergoes thermal cycloaddition to give the nitro cycloadduct (5) and it is assumed that the hydroxy cycloadduct (7) is formed in analogous manner from 4-methyl-t-1-trinitromethyl-1,2-dihydronaphthalen-r-2-ol (8). X-Ray crystal structure determinations are reported for adducts (1), (3)-(5) and (7).

lodsubstituierte Eisen-Schwefel-Cluster: Neue Synthesen sowie zur Bildung und Stabilität von Fe2S2I42-, Fe4S4I42– und Fe6S6I62-. Die Kristallstruktur von (Et4N)6(Fe4S4l4)2Fe2S2l4 / Iodine Substituted Iron-Sulfur-Clusters: Novel Syntheses, Formation and Stability of Fe2S2I42-, Fe4S4I42- und Fe6S6I62-. The Crystal Structure of (Et4N)6(Fe4S4l4)2Fe2S2l4

1985 ◽  
Vol 40 (9) ◽  
pp. 1105-1112 ◽  
Author(s):  
Wolfgang Saak ◽  
Siegfried Pohl
Keyword(s):  
Crystal Structure ◽  
Elemental Sulfur ◽  
Quantitative Yield ◽  
Iron Sulfur Clusters ◽  
Iodide Ions ◽  
Biological Relevance ◽  
Iron Sulfur ◽  
The Stability

Fe4S4I42- has been prepared in tetrahydrofuran (THF) solution by the reaction of Fe, S8, I2, and Me3NCH2Ph+TI-, and isolated as black, fairly air-stable crystals of (Me3NCH2Ph)2Fe4S4I4 (1) in nearly quantitative yield. 1 reacts with iron and iodine or with elemental sulfur and Fel2 in CH2Cl2 solution to form Fe6S6I62- which was isolated as black crystals of (Me3NCH2Ph)2Fe6S6I6 (5). In THF solution Fe6S6I62- is converted to Fe4S4I42- which was isolated as Fe(THF)6Fe4S4I4·4 THF (3). Evidence is presented for an equilibrium between Fe2S2I42- and Fe4S4I42-, Fel42- and sulfur when iron, sulfur, iodine and Et4N+I- react (with the required stoichiometry) to form Fe2S2I42- in CH2Cl2 solution. From this solution (Et4N)6(Fe4S4I4)2Fe2S2I4 (6 ) crystallizes as black needles (tetragonal, P42bc, a = 2467.9, b = 1653.8 pm, Z = 4). Crystals of 6 consist of the discrete anions Fe4S4I42- and Fe2S2I42- and Et4N+ cations. The [Fe4S4]2+ core does not exhibit the usually observed core distortion. This clearly demonstrates that additional ligands (THF, CH3CN, iodide ions etc.) strongly reduce the stability of iodine substituted Fe/S clusters (except [Fe4S4]2+ cores!). The biological relevance of the observed rearrangements is discussed.

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