synthesis germanium functions
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synthesis germanium functions

Synthesis and biological evaluation of Germanium(IV ...

Germanium (Ge) is considered to play a key role in the pharmacological effects of some medicinal plants. Here, two new Ge(IV)-polyphenol complexes were synthesized and measured for their potential biological activities. The results indicated that these Ge(IV)-polyphenol complexes possessed great ant

Synthesis of germanium derivatives of uracil and 5 ...

Jan 01, 1983  Synthesis of germanium derivatives of uracil and 5-fluorouracil ... Its biological test has shown that Ge-132 not only possesses antitumor activities 4'5), but also functions as an inducer of interferon 6'7) with almost no detectable sign of toxicity. 8,9) Encouraged by these promising results, we developed the idea that the incorporation of a ...

Synthesis and reaction of monomeric germanium(II) and lead ...

Jun 21, 2010  Synthesis and reaction of monomeric germanium(II) and lead(II) dimethylamide and the synthesis of germanium(II) hydrazide by cleavage of one N-H bond of hydrazine. Jana A(1), Roesky HW, Schulzke C, Samuel PP, Döring A.

Colloidal Synthesis of Germanium Nanorods Chemistry of ...

A colloidal synthesis of crystalline germanium (Ge) nanorods is reported. Diphenylgermane (DPG) is decomposed in a high boiling solvent in the presence of bismuth (Bi) nanocrystals and trioctylphosphine oxide (TOPO). The Bi nanocrystals induce solution−liquid−solid (SLS) growth of the Ge nanorods, and TOPO serves as a capping ligand to prevent aggregation. The resulting nanorods are ...

Synthesis of Germanium Nanoclusters with Irreversibly ...

This method has also been employed for the synthesis of gram-quantities of organic-capped germanium nanoparticles (108)(109) (110). As in the case of silicon, the as-synthesized germanium ...

Synthesis, properties and applications of colloidal ...

Germanium nanoparticles have excited scientists and engineers because of their size-dependent optical properties and their potential applications in optoelectronics, biological imaging and therapeutics, flash memories, and lithium-ion batteries. In order to further develop these applications and to gain deep Chemistry of functional nanomaterials

Germanium Compounds - an overview ScienceDirect Topics

Direct synthesis of di- and tetravalent germanium compounds is possible. 1 Thus germanium metal–solvent slurries provide a reactive surface for organic halides (BrCCl 3, CCl 4, CHCl 3, MeI, EtI, etc.) giving organogermanium halides in low yields. 73 Thermally generated germanium atoms also react with organic halides by insertion into carbon–halogen bonds.

Synthesis of germanium nanocrystals in SiO2 SpringerLink

Germanium nanocrystals in SiO2 with an average diameter of 5–25 nm were fabricated by co-deposition and annealing at 700–1000 °C. X-ray diffraction and transmission electron microscopy were used to measure the nanocrystal growth as a function of anneal time and temperature. The precipitation of nanocrystals was found not to follow the theory for precipitation from a solid solution of ...

Germanium nanospheres for ultraresolution picotensiometry ...

Feb 12, 2021  Simultaneously measuring the nanoscale motion and forces that molecular machines generate provides insights into how they work mechanically to fulfill their cellular function. To study these machines, Sudhakar et al. developed germanium semiconductor nanospheres as probes for so-called optical tweezers. With these high–refractive index nanospheres, they improved the resolution of

Germanium (Ge) — Mineral Balancing

A synthetic organometallic compound that contains germanium, called Spirogermanium has been shown to inhibit the synthesis of DNA and RNA in HeLa cells (Schauss, 1991). Germanium sesquioxide can enhance the immune function by affecting the activity of macrophage and T-cells (F Suzuki, 1985) as well as gamma interferon (Suzuki Pollard, 1984).

Solution Synthesis of Germanium Nanowires Using a Ge ...

Solution Synthesis of Germanium Nanowires Using a Ge2+ ... TEM images intermittently taken during the growth process as a function of time: (1) self-seeding mechanism where one of two overlapping nanowires serves as a seed, while the other continues to grow as a wire;

Recent advances in germanium nanocrystals: Synthesis ...

Oct 01, 2017  Synthesis of germanium nanocrystals. The synthesis of Ge NCs can be broadly divided into two categories: physical and chemical methods. Although there are a few interesting publications based on physical methods to produce Ge NCs, this review will give a very brief summary of these, but will mainly focus on solution based chemical methods ...

Germanium nanowires: from synthesis, surface chemistry ...

resistant Germanium nanowires: bulk synthesis, long-chain alkanethiols functionalization and Langmuir-Blodgett assembly. J. Am. Chem. Soc. 127, 11871-11875, 2005 3. Dunwei Wang, Ryan Tu, Li Zhang and Hongjie Dai, One-to-one synthesis of Germanium Nanowires and patterning of individual Gold nanoparticles for aligned nanowire arrays. Angew. Chem ...

Germanium Memorial Sloan Kettering Cancer Center

Jun 02, 2020  Germanium is a naturally occurring element. Trace amounts can be found in foods such as shiitake mushrooms, garlic, tuna, and tomato juice. However, it is not an essential nutrient for human health. Germanium was considered by some as an elixir in the 1970s and ’80s for diseases such as cancer and AIDS. Earlier lab experiments suggested it ...

Germanium - SinoSanTech

Germanium Sesquioxide (Organic Germanium) is one of the ingredients of many medicinal plants, ginseng and other medicinal plants are rich in organic germanium, with a unique health function. Since 1971, a scholar synthesis the carboxyethyl germanium sesquioxide (GeCH2COOH 203), referred to as Ge-132 and confirmed having anticancer activity.

Effect of the Germanium Incorporation in the Synthesis of ...

Effect of the Germanium Incorporation in the Synthesis of EU1, ITQ-13, ITQ-22, and ITQ-24 Zeolites. German Sastre. Related Papers. Synthesis, Characterization, and Framework Heteroatom Localization in ITQ-21. By Jordi Rius. The ADOR mechanism for the synthesis of new zeolites.

Synthesis of germanium nanocrystals in SiO2 SpringerLink

Germanium nanocrystals in SiO2 with an average diameter of 5–25 nm were fabricated by co-deposition and annealing at 700–1000 °C. X-ray diffraction and transmission electron microscopy were used to measure the nanocrystal growth as a function of anneal time and temperature. The precipitation of nanocrystals was found not to follow the theory for precipitation from a solid solution of ...

Synthesis and Structural Characterization of ...

Synthesis and Structural Characterization of Hexacoordinate Silicon, Germanium, and Titanium Complexes of the E. coli Siderophore Enterobactin Todor Baramov Technische Universität Berlin, Fakultät II, Institut für Chemie, Strasse des 17.

Synthesis and characterization of type II silicon and ...

37 3.3 Partially Filled Type II Germanium Clathrates As mentioned in Section 2.2, recently we have reported for the first time on the synthesis of partially filled type II clathrate Cs8Ge136.32 Although the type I germanium clathrates are found to be much less st able with respect to partial filling,87 type II clathrates can be synthesized with ...

Fundamental aspects of nucleation and growth in the ...

Colloidal Ge nanocrystals (NCs) were synthesized via the solution phase reduction of germanium(II) iodide.We report a systematic investigation of the nanocrystal nucleation and growth as a function of synthesis conditions including the nature of coordinating solvents, surface bound ligands, synthesis duration and temperature. NC synthesis in reaction environments with weakly bound phosphine ...

Synthesis of 2D Germanane (GeH): a New, Fast, and Facile ...

Aug 31, 2020  No diffraction peaks from elemental germanium were observed, demonstrating the advantage of this new synthesis method over the method involving HCl. After liquid exfoliation, AFM analysis of the drop‐casted suspension revealed the presence of single layers of germanane with a thickness of about 7 Å.

Quantum dot - Wikipedia

Plasma synthesis. Plasma synthesis has evolved to be one of the most popular gas-phase approaches for the production of quantum dots, especially those with covalent bonds. For example, silicon (Si) and germanium (Ge) quantum dots have been synthesized by using nonthermal plasma. The size, shape, surface and composition of quantum dots can all ...

Novel germanium(ii) binaphthoxide complexes: synthesis and ...

Novel germanium(ii) binaphthoxide complexes: synthesis and crystal structure of (R,R)-[Ge{OC 20 H 10 (OSiMe 3)-2′-(SiMe 3) 2-3,3′} 2] and (R)-[Ge{O 2 C 20 H 10 (SiMe 2 Ph) 2-3,3′}{NH 3}]; catalytic function of Ge[N(SiMe 3) 2] 2 for the mono-silylation of 3,3′-disubstituted-1,1′-bi-2,2′-naphthols

Synthesis and Characterization of Type II Silicon and ...

synthesis and characterization of silicon and germanium type II clathrates was performed using a range of synthetic, crystallographic, chemical, calorimetric, and transport measurement techniques. A series of framework substituted type II germanium clathrates has been synthesized for the first time, and transport measurements indicate that these

Germanium nanowires: from synthesis, surface chemistry ...

resistant Germanium nanowires: bulk synthesis, long-chain alkanethiols functionalization and Langmuir-Blodgett assembly. J. Am. Chem. Soc. 127, 11871-11875, 2005 3. Dunwei Wang, Ryan Tu, Li Zhang and Hongjie Dai, One-to-one synthesis of Germanium Nanowires and patterning of individual Gold nanoparticles for aligned nanowire arrays. Angew. Chem ...

Effect of the Germanium Incorporation in the Synthesis of ...

Effect of the Germanium Incorporation in the Synthesis of EU1, ITQ-13, ITQ-22, and ITQ-24 Zeolites. German Sastre. Related Papers. Synthesis, Characterization, and Framework Heteroatom Localization in ITQ-21. By Jordi Rius. The ADOR mechanism for the synthesis of new zeolites.

Germanium - SinoSanTech

Germanium Sesquioxide (Organic Germanium) is one of the ingredients of many medicinal plants, ginseng and other medicinal plants are rich in organic germanium, with a unique health function. Since 1971, a scholar synthesis the carboxyethyl germanium sesquioxide (GeCH2COOH 203), referred to as Ge-132 and confirmed having anticancer activity.

Synthesis of low-oxidation-state germanium clusters ...

Europe PMC is an archive of life sciences journal literature. Synthesis of low-oxidation-state germanium clusters comprising a functional anchor group - synthesis and characterization of [(Ge0)5(Ge-R)3(Ge-(CH2)n-CH[double bond, length as m-dash]CH2)] with R = Si(SiMe3)3.

Synthesis and characterization of type II silicon and ...

37 3.3 Partially Filled Type II Germanium Clathrates As mentioned in Section 2.2, recently we have reported for the first time on the synthesis of partially filled type II clathrate Cs8Ge136.32 Although the type I germanium clathrates are found to be much less st able with respect to partial filling,87 type II clathrates can be synthesized with ...

Synthesis, Properties, and Derivatization of Poly ...

Apr 16, 2021  Polygermanes are germanium-based analogues of polyolefins and possess polymer backbones made up catenated Ge atoms. In the present contribution we report the preparation of a germanium polyethylene analogue, polydihydrogermane (GeH 2) n, via two straightforward approaches that involve topotactic deintercalation of Ca ions from the CaGe Zintl phase.. The resulting (GeH 2) n

"Synthesis and Characterization of Type II Silicon and ...

synthesis and characterization of silicon and germanium type II clathrates was performed. using a range of synthetic, crystallographic, chemical, calorimetric, and transport. measurement techniques. A series of framework substituted type II germanium clathrates. has been synthesized for the first time, and transport measurements indicate that these

Fundamental aspects of nucleation and growth in the ...

Colloidal Ge nanocrystals (NCs) were synthesized via the solution phase reduction of germanium(II) iodide.We report a systematic investigation of the nanocrystal nucleation and growth as a function of synthesis conditions including the nature of coordinating solvents, surface bound ligands, synthesis duration and temperature. NC synthesis in reaction environments with weakly bound phosphine ...

Synthesis of germanium nanocrystals in SiO2, Journal of ...

Sep 29, 2004  Germanium nanocrystals in SiO2 with an average diameter of 5–25 nm were fabricated by co-deposition and annealing at 700–1000 °C. X-ray diffraction and transmission electron microscopy were used to measure the nanocrystal growth as a function of anneal time and temperature. The precipitation of nanocrystals was found not to follow the theory for precipitation from a solid solution of ...

Synthesis of 2D Germanane (GeH): a New, Fast, and Facile ...

Aug 31, 2020  No diffraction peaks from elemental germanium were observed, demonstrating the advantage of this new synthesis method over the method involving HCl. After liquid exfoliation, AFM analysis of the drop‐casted suspension revealed the presence of single layers of germanane with a thickness of about 7 Å.

Quantum dot - Wikipedia

Plasma synthesis. Plasma synthesis has evolved to be one of the most popular gas-phase approaches for the production of quantum dots, especially those with covalent bonds. For example, silicon (Si) and germanium (Ge) quantum dots have been synthesized by using nonthermal plasma. The size, shape, surface and composition of quantum dots can all ...

Organic Germanium and its Implications for Cancer

The germanium compound, whether administered orally or injected, deprives cancer cells of electrons, and thereby reduces their electrical potential. In biochemical terms, this means that the germanium compound brings about a dehydrogenation reaction, ultimately suspending the activities of cancer cells.

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