24927-67-1Relevant academic research and scientific papers
Cation-anion interaction-directed formation of functional vesicles and their biological application for nucleus-specific imaging
Kong, Qunshou,Zhuang, Weihua,Li, Gaocan,Jiang, Qing,Wang, Yunbing
, p. 9187 - 9192 (2018)
A strategy for construction of counterion-induced vesicles in aqueous media has been described using imidazolium salts with multiple imidazolium moieties and alkyl carboxylate counteranions. The spontaneous formation of vesicles can be achieved by the simple selection of the counteranion to satisfy the requirement of the packing parameter for vesicle formation. Functional fluorescent vesicles can also be formed by the introduction of an aggregation-induced emission (AIE) fluorophore, tetraphenylethene (TPE), as the core of the imidazolium salt TPEI-C8, which also exhibits highly specific nucleus imaging in living cells. Considering the distinct AIE characteristic of TPEI-C8, the aggregation-induced strong fluorescence emission of TPEI-C8 in the cell nucleus may be the main reason for the specific fluorescence images of the cell nucleus. The strategy for the construction of functional vesicles reported in this study has shown great potential for the construction of other functional vesicles.
Structural, odd-even chain alternation and thermal investigation of a homologous series of anhydrous silver(i) n-alkanoates
Nelson, Peter Nattaniel,Ellis, Henry Anthony
, p. 2632 - 2638 (2012/04/10)
Molecular and lattice structures of a homologous series (nc = 8-20, inclusive) of silver (i) n-alkanoates are determined from X-ray Powder Diffraction, Solid State spin decoupled 13C-NMR and variable temperature Fourier Transform Infrared Spectroscopies. The compounds crystallize in a monoclinic crystal system with hydrocarbon chains in the fully extended all-trans conformation. Moreover, the chains are tilted ca. 75° with respect to the metal basal plane and are arranged as methyl(tail)-to-methyl(tail) bilayers within a lamellar. The methyl chain ends, from different layers in the bilayer, do not overlap but are in such close proximity to cause methyl-methyl interactions. In a molecule, two carboxylate groups bind in a syn-syn type bridging bidentate mode to two silver atoms to form an eight-membered structure. Intramolecular silver-silver and intermolecular Ag-O-Ag interactions stabilize the head group and promote the formation of layer type polymeric sheets. Though the compounds are nearly isostructural, odd-even chain alternation is observed in density, anti-symmetric stretching vibrations of methyl and unusually, carboxylate (head) groups, as a result of packing differences of hydrocarbon chains within the crystal lattice. These arise from the relative vertical distances between polymeric sheets, which are not in the same plane. Thus, for odd chain length compounds, where those distances are less than for even chains, more ordered packing and hence higher densities are observed for these adducts. Also, the numbers and natures of the thermotropic phase transitions are chain length dependent and irreversible. The Royal Society of Chemistry 2012.
Microwave-assisted preparation of silver nanoparticles
Yamamoto, Tetsushi,Wada, Yuji,Sakata, Takao,Mori, Hirotaro,Goto, Masaki,Hibino, Shingo,Yanagida, Shozo
, p. 158 - 159 (2007/10/03)
We succeeded in preparing silver (Ag) nanoparticles by alcohol reduction of fatty acid silver salts under microwave irradiation (2.45 GHz) for 1-5 min at 413-430 K. The average sizes of Ag nanoparticles were controlled in the range from 4.9 to 7.4 nm only
