12034-41-2Relevant articles and documents
Improved selectivity for Pb(II) by sulfur, selenium and tellurium analogues of 1,8-anthraquinone-18-crown-5: Synthesis, spectroscopy, X-ray crystallography and computational studies
Mariappan, Kadarkaraisamy,Alaparthi, Madhubabu,Hoffman, Mariah,Rama, Myriam Alcantar,Balasubramanian, Vinothini,John, Danielle M.,Sykes, Andrew G.
, p. 11774 - 11787 (2015)
We report here a series of heteroatom-substituted macrocycles containing an anthraquinone moiety as a fluorescent signaling unit and a cyclic polyheteroether chain as the receptor. Sulfur, selenium, and tellurium derivatives of 1,8-anthraquinone-18-crown-5 (1) were synthesized by reacting sodium sulfide (Na2S), sodium selenide (Na2Se) and sodium telluride (Na2Te) with 1,8-bis(2-bromoethylethyleneoxy)anthracene-9,10-dione in a 1:1 ratio. The optical properties of the new compounds are examined and the sulfur and selenium analogues produce an intense green emission enhancement upon association with Pb(ii) in acetonitrile. Selectivity for Pb(ii) is markedly improved as compared to the oxygen analogue 1 which was also competitive for Ca(ii) ion. UV-Visible and luminescence titrations reveal that 2 and 3 form 1:1 complexes with Pb(ii), confirmed by single-crystal X-ray studies where Pb(ii) is complexed within the macrocycle through coordinate covalent bonds to neighboring carbonyl, ether and heteroether donor atoms. Cyclic voltammetry of 2-8 showed classical, irreversible oxidation potentials for sulfur, selenium and tellurium heteroethers in addition to two one-electron reductions for the anthraquinone carbonyl groups. DFT calculations were also conducted on 1, 2, 3, 6, 6 + Pb(ii) and 6 + Mg(ii) to determine the trend in energies of the HOMO and the LUMO levels along the series.
Preparation and reactions of sodium telluride, Na2Te - Crystal structure of [Na(CH3OH)3]2Te2
Thiele,Steinicke,Dümichen,Neumüller
, p. 231 - 234 (1996)
Sodium telluride, Na2Te 1, is easily obtained by reaction of sodium with hexagonal tellurium in 1,2-dimethoxy-ethane in the presence of catalytic amounts of naphthalene. Upon exposure to oxygen 1 reacts with methanol forming [Na(CH3O
Highly reversible Na-ion reaction in nanostructured Sb2Te3-C composites as Na-ion battery anodes
Nam, Ki-Hun,Choi, Jeong-Hee,Park, Cheol-Min
, p. A2056 - A2064 (2017)
Sb2Te3 and its amorphous carbon-modified nanocomposite (Sb2Te3-C) are synthesized by simple solid-state synthetic methods, and their potential as anode materials for rechargeable Na-ion batteries (NIBs) is evaluated. Ex situ X-ray diffraction and high-resolution transmission electron microscopy clearly demonstrate the sodiation/desodiation reaction mechanism of the Sb2Te3 and Sb2Te3-C nanocomposite electrodes. In both electrodes, Sb2Te3 is converted into Na3Sb and Na2Te during Na insertion. However, Na3Sb and Na2Te in only the Sb2Te3-C nanocomposite electrode recombine into the original Sb2Te3 phase after full Na extraction. As a consequence of its interesting conversion/recombination reaction during sodiation/desodiation reaction, the Sb2Te3-C nanocomposite electrode exhibits a long cycle life with highly reversible gravimetric and volumetric capacity (373 mAh g-1 and 765 mAh cm-3 over 50 cycles) and fast rate capability (1 C: 391 mAh g-1 and 802 mAh cm-3; 2 C: 377 mAh g-1 and 773 mAh cm-3).
Synthesis of Diphenylchalcogenophene Diboronic Acid Bis(pinacol) Esters and Halogen Photoelimination from Tellurium by Triplet–Triplet Annihilation
Li, Peng-Fei,Carrera, Elisa I.,Seferos, Dwight S.
, p. 917 - 921 (2016)
The synthesis of diphenylthiophene-, diphenylselenophene-, and diphenyltellurophene-based diboronic bis(pinacol) esters and their optoelectronic properties is reported. The addition of bromine to the borylated diaryltellurophene and subsequent photoelimination are investigated. The photochemical quantum yield of bromine photoelimination is (9.7±0.2) % at a 4.4 m trap (2,3-dimethyl-1,3-butadiene) concentration. It is found that the bromine photoelimination reaction can also be driven by the incorporation of a triplet sensitizer through a triplet–triplet annihilation process.
Fernelius, W. C.,Watt, C. W.
, p. 195 - 258 (1937)
Synthesis, structure and reactivity of cyclopropenyl-1-ylidene stabilized S(ii), Se(ii) and Te(ii) mono- and dications
Kozma, Agnes,Petuskova, Jekaterina,Lehmann, Christian W.,Alcarazo, Manuel
, p. 4145 - 4147 (2013)
The syntheses and structural characterization of carbene-stabilized chalcogen centred mono- and dications employing a reverse electron demand onio-substitutent transfer strategy are reported. The electronic structures of these compounds were determined by density functional calculations and their reactivity towards Pd(0) centres was evaluated.
Nitrile functionalized organogermane chalcogenide clusters with hetero-(nor-)adamantane cores Dedicated to Professor Heinrich Lang on the occasion of his 60th birthday.
Heimann, Samuel,Thiele, Günther,Dehnen, Stefanie
, p. 36 - 40 (2016)
By the synthesis of Cl3Ge(CH2)2CN (1) and subsequent reaction with sodium monochalcogenides, adamantane-type [(NC(CH2)2Ge)4Ch6] (Ch = S (2), Se) and noradamantane-type [(NC(CH2)2Ge)4Te5] (3) were obtained. The compounds represent the first nitrile-functionalized tetrel chalcogenide clusters and the first nitrile-functionalized clusters of the named architectures, and are thus potential precursor for novel reaction pathways to multifunctional core-shell compounds.
Supramolecular Self-Assembled DNA Nanosystem for Synergistic Chemical and Gene Regulations on Cancer Cells
Ding, Xiaohui,Dong, Yuhang,Li, Feng,Li, Shuai,Li, Zhemian,Lv, Zhaoyue,Yang, Dayong,Yao, Chi,Zhang, Xue
supporting information, p. 25557 - 25566 (2021/11/05)
Incorporating multiple molecular interactions within a system to realize the metabolic reprogramming of cancer cells is prospected to be of great potential in cancer therapy. Herein, we report a supramolecular self-assembled DNA nanosystem, which reprogrammed the cellular antioxidant system via synergistic chemical and gene regulations. In the nanosystem, amphipathic telluroether was coordinated with MnII to self-assemble into micelle, on which a siNrf2 integrated DNA network was assembled. The great electron-donating capability of telluroether was revealed to greatly promote MnII-based Fenton-like reaction to generate subversive .OH in cancer cells. In response to adenosine triphosphoric acid, the siNrf2 was specially released in cytoplasm for down-regulating expression of detoxification enzymes, which enhanced chemocatalysis-mediated oxidative stress in cancer cells, thus significantly suppressing tumor progression.
