- Ribbed-functionalized iron(II) tris-dioximate clathrochelates with pendant fragments of various types: Synthetic pathways, structures, and properties
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Nucleophilic substitution of chlorine atoms in the iron(II) hexachloride clathrochelate on treatment with thiolate anions afforded hexafunctionalized tris-dioximate complexes with the pendant n-butyl-, n-octylsulfide, silatrane, and captopryl functionalizing groups. These complexes were characterized by elemental analysis, IR, UV-Vis, 1H and 13C NMR, and 57Fe Moessbauer spectroscopies, and plasma-desorption mass spectrometry. The crystal and molecular structures of the n-butylsulfide and silatrane clathrochelates were established by X-ray diffraction analysis. Cyclic voltammetry study demonstrated that the Fe2+/Fe3+ redox process of the encapsulated iron ion is responsible for the electrochemical behavior of the prepared compounds in solution.
- Voloshin,Varzatskii,Vorontsov,Antipin,Lebedev,Belov,Strizhakova
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- Silanization of solid surfaces via mercaptopropylsilatrane: A new approach of constructing gold colloid monolayers
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Mercaptopropylsilatrane (MPS) was investigated as a novel self-assembled film on silica surfaces and also as a novel adhesive layer for the construction of a gold colloid monolayer on silica surfaces. We compare the preparation procedure and film quality of the MPS films to those of (3-mercaptopropyl)trimethoxysilane (MPTMS), which is commonly used for anchoring of gold nanoparticles on silica surfaces. The films were characterized by Fourier transform infrared spectroscopy, contact angle measurements, X-ray photoelectron spectroscopy, atomic force microscopy, and Ellman's reagent to determine surface mercaptan concentration. The process in preparing the MPS films involves more environmentally friendly aqueous or polar organic solvents, takes significantly shorter time (30 min), and results in more uniform and reproducible films due to its insensitivity to moisture. The MPS films also have higher mercaptan surface density than that of the MPTMS films, resulting in higher saturation coverage of the gold colloid monolayers on the MPS-coated substrates. The higher ambient stability of the MPS films as compared to the MPTMS films is important for applications where sufficient durability of the self-assembled films under ambient conditions is required. Thus, mercaptosilatrane may have the potential to replace mercaptosilane for surface modification and as an adhesive layer for the construction of a noble metal colloid monolayer on oxide surfaces.
- Chen, Wen-Hao,Tseng, Yen-Ta,Hsieh, Shuchen,Liu, Wan-Chun,Hsieh, Chiung-Wen,Wu, Chin-Wei,Huang, Chen-Han,Lin, Hsing-Ying,Chen, Chao-Wen,Lin, Pei-Ying,Chau, Lai-Kwan
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- MANUFACTURING METHOD OF SILATRANE WITH THIOL GROUP AND PRESERVATION METHOD THEREOF
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A manufacturing method of silatrane with thiol group and a preservation method thereof are disclosed. (3-Mercaptopropyl)trimethoxysilane and triethanolamine with or without catalyst are reacted for a pre-determined time at a pre-determined temperature under nitrogen atmosphere, and then a recrystallization process is performed with a solvent to obtain silatrane with thiol group of formula (1). Silatrane with thiol group is dissolved in an organic solvent to preserve the silatrane with thiol group.
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Paragraph 0035; 0036
(2016/11/07)
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- Thioester-appended organosilatranes: Synthetic investigations and application in the modification of magnetic silica surfaces
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The present investigation discloses a series of new organosilicon derivatives (3a-k) tailored with substituted benzoic acid modules (1a-k) via thioesterification with 3-mercaptopropylsilatrane (MPS). Product formation was authenticated using elemental analyses and different spectroscopic methods comprising FT-IR, NMR [1H, 13C] and LC-MS (Q-TOF). Thereafter, complete structural elucidation of compounds 3c and 3f was achieved by the single crystal X-ray technique. Photo-electronic inspection of all compounds by UV-Vis spectroscopy revealed their sensitivity towards substitution patterns. In addition, this is the first time that the potential of a silatranyl moiety has been tested for the modification of a silica surface pre-decorated with a magnetite core. The synthesis was achieved through a facile methodology involving chemical bonding at each stage, which proceeded without any external surfactant or template. The course of the reaction was followed by FT-IR, UV-Vis, XRD, TEM, FESEM, EDX and TGA techniques. Furthermore, the hybrid nanomaterial possessed significant sensorial ability toward copper ions, which makes the present protocol favourable for the construction of a new class of chelating ligands with an in-built multifunctional nanodevice.
- Singh, Gurjaspreet,Rani, Sunita,Arora, Aanchal,Aulakh, Darpandeep,Wriedt, Mario
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p. 6200 - 6213
(2016/07/19)
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