Hydrothermal Synthesis and Structure Characterization of Two Hybrid Metal Phosphonates Materials

2015 ◽  
Vol 1088 ◽  
pp. 309-313
Author(s):  
Chang Feng Sun ◽  
Yan Yan Pang ◽  
Ying Zhao ◽  
Yu Yang
Keyword(s):  
Hydrothermal Synthesis ◽  
Structure Characterization ◽  
Hydrothermal Conditions ◽  
Metal Phosphonates ◽  
Two Hybrid

Under hydrothermal conditions, two copper phosphonates, [Cu2(H2O)2(H2L)(bpy)2(H3L)2]·2H2O (1) and [Cu2(H2O)2(H2L)2(phen)2]·6H2O (2) (H4L = p-xylylenediphosphonic acid, bpy = 2,2'-bipyridine and phen = 1,10-phenanthroline), have been synthesized using diethyl p-xylylenediphosphonate (dixdp), in which p-xylylenediphosphonic acid (H4L) was generated via in situ hydrolysis. Complexe 1 forms a zero-dimensional (0D) bimetallic rings, while complex 2 features a 0D structure containing two kinds of partially deprotonated H3L-and H2L2-ligand.

Hydrothermal synthesis, X-ray structure and DFT and magnetic studies of a (H2SiW12O40)2− based one-dimensional linear coordination polymer

2015 ◽  
Vol 44 (19) ◽  
pp. 8824-8832 ◽  
Author(s):  
Masoud Mirzaei ◽  
Hossein Eshtiagh-Hosseini ◽  
Mahboubeh Alipour ◽  
Antonio Bauzá ◽  
Joel T. Mague ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Synthesis And Characterization ◽  
Hydrothermal Conditions ◽  
Magnetic Studies ◽  
One Dimensional ◽  
X Ray ◽  
Organic Hybrid ◽  
Linear Coordination

In this paper, we report the synthesis and characterization of a novel POM-based inorganic–organic hybrid with an in situ transformation of pyridine-2,3-dicarboxylic acid into nicotinic acid and 2-hydroxynicotinic acid under hydrothermal conditions.

In situ hydrodynamic spectroscopy for structure characterization of porous energy storage electrodes

2016 ◽  
Vol 15 (5) ◽  
pp. 570-575 ◽  
Author(s):  
Netanel Shpigel ◽  
Mikhael D. Levi ◽  
Sergey Sigalov ◽  
Olga Girshevitz ◽  
Doron Aurbach ◽  
...  
Keyword(s):  
Energy Storage ◽  
Structure Characterization

Synthesis and characterization of the lead borate Pb6B12O21(OH)6

2016 ◽  
Vol 71 (8) ◽  
pp. 925-933 ◽  
Author(s):  
Sandra Schönegger ◽  
Teresa S. Ortner ◽  
Klaus Wurst ◽  
Gunter Heymann ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
Hydrothermal Synthesis ◽  
Potassium Nitrate ◽  
Lattice Parameters ◽  
Synthesis And Characterization ◽  
Lead Borate ◽  
Hydrothermal Conditions ◽  
Organic Reagents ◽  
Synthesis Conditions

AbstractA lead borate with the composition Pb6B12O21(OH)6 was synthesized through a hydrothermal synthesis, using lead metaborate in combination with sodium nitrate and potassium nitrate. The compound crystallizes in the trigonal, non-centrosymmetric space group P32 (no. 145) with the lattice parameters a = 1176.0(4), c = 1333.0(4) pm, and V = 0.1596(2) nm3. Interestingly, the data of Pb6B12O21(OH)6 correct the structure of a literature known lead borate with the composition “Pb6B11O18(OH)9”. For the latter compound, nearly identical lattice parameters of a = 1176.91(7) and c = 1333.62(12) pm were reported, possessing a crystal structure, in which the localization and refinement of one boron atom was obviously overlooked. The structure of Pb6B12O21(OH)6 is built up from trigonal planar BO3 and tetrahedral BO4 groups forming complex chains. The Pb2+ cations are located between neighboring polyborate chains. The here reported compound Pb6B12O21(OH)6 and “Pb6B11O18(OH)9” were, however, produced under different synthesis conditions. While “Pb6B11O18(OH)9” was synthesized via a hydrothermal synthesis including ethylenediamine and acetic acid, the here reported lead borate Pb6B12O21(OH)6 could be obtained under moderate hydrothermal conditions (240°C) without the addition of organic reagents.

scholarly journals Hydrothermal synthesis of long-chain hydrocarbons up to C24 with NaHCO3-assisted stabilizing cobalt

2021 ◽  
Vol 118 (51) ◽  
pp. e2115059118
Author(s):  
Daoping He ◽  
Xiaoguang Wang ◽  
Yang Yang ◽  
Runtian He ◽  
Heng Zhong ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Hydrothermal Synthesis ◽  
Co Adsorption ◽  
Hydrothermal Systems ◽  
Hydrothermal Conditions ◽  
Hydrocarbon Synthesis ◽  
Emergence Of Life ◽  
Long Chain ◽  
Chain Hydrocarbon

Abiotic CO2 reduction on transition metal minerals has been proposed to account for the synthesis of organic compounds in alkaline hydrothermal systems, but this reaction lacks experimental support, as only short-chain hydrocarbons (<C5) have been synthesized in artificial simulation. This presents a question: What particular hydrothermal conditions favor long-chain hydrocarbon synthesis? Here, we demonstrate the hydrothermal bicarbonate reduction at ∼300 °C and 30 MPa into long-chain hydrocarbons using iron (Fe) and cobalt (Co) metals as catalysts. We found the Co0 promoter responsible for synthesizing long-chain hydrocarbons to be extraordinarily stable when coupled with Fe−OH formation. Under these hydrothermal conditions, the traditional water-induced deactivation of Co is inhibited by bicarbonate-assisted CoOx reduction, leading to honeycomb-native Co nanosheets generated in situ as a new motif. The Fe−OH formation, confirmed by operando infrared spectroscopy, enhances CO adsorption on Co, thereby favoring further reduction to long-chain hydrocarbons (up to C24). These results not only advance theories for an abiogenic origin for some petroleum accumulations and the hydrothermal hypothesis of the emergence of life but also introduce an approach for synthesizing long-chain hydrocarbons by nonnoble metal catalysts for artificial CO2 utilization.

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