Structure-Activity Relationship Modeling and Experimental Validation of the Imidazolium and Pyridinium Based Ionic Liquids as Potential Antibacterials of MDR Acinetobacter baumannii and Staphylococcus aureus
Quaternary pyridinium salts with chains ranging from C8 to C20 belong in the large group of cationic surfactants. In this paper, the preparation of such cationic surface active agents based on the pyridinium moiety and differing in the length of the N-alkyl chain is described. Additionally, HPLC technique was established to distinguish each prepared pyridinium analogue. This study represents universal
Importance of Solution Equilibria in the Directed Assembly of Metal Chalcogenide Mesostructures
作者:Santanu Bag、Mercouri G. Kanatzidis
DOI:10.1021/ja800741h
日期:2008.7.1
spectroscopy and it is shown that rapidexchange equilibrium is reached between species like [Ge4Se10](4-), [Ge2Se6](4-), and [GeSe4](4-) in both water and formamide. This results in multiple Ge/Se anions being incorporated in the mesostructured materials which is supported by Raman and IR spectroscopic data. It is likely that the presence of multiple building units both in water and formamide solutions favors
COMPOUND, COMPOSITION, AND METHOD FOR PROTECTING SKIN FROM HIGH ENERGY VISIBLE LIGHT
申请人:PHOTOPROTECTIVE TECHNOLOGIES, INC.
公开号:US20160317425A1
公开(公告)日:2016-11-03
A compound, composition, and method for the protection of skin from the harmful effects of radiation, and particularly the harmful effects of high energy visible (HEV) radiation, are disclosed. The compound is a melanin derivative that can be formulated into compositions containing the melanin derivative and a suitable carrier. The composition is topically applied to the skin to reduce the risk of photoaging and improve skin repair due to damage from radiation.
Synthesis, Characterization and Conductivity of Quaternary Nitrogen Surfactants Modified by the Addition of a Hydroxymethyl Substructure on the Head Group
作者:Deborah Jordan、Eng Tan、Dylan Hegh
DOI:10.1007/s11743-012-1360-1
日期:2012.9
Two novel series of hydroxymethylgroup‐appended quaternarynitrogensurfactants (QNSs) based on the aliphatic N‐alkyl‐trimethylammonium and aromatic N‐alkylpyridinium headgroups were synthesized from the appropriate nitrogenheadgroup precursor and 1‐bromoalkane. The QNSs were characterized using 1H and 13C nuclear magnetic resonance and infrared spectroscopy, and their purity confirmed using elemental
Platinum Chalcogenido MCM-41 Analogues. High Hexagonal Order in Mesostructured Semiconductors Based on Pt<sup>2+</sup> and [Ge<sub>4</sub>Q<sub>10</sub>]<sup>4-</sup> (Q = S, Se) and [Sn<sub>4</sub>Se<sub>10</sub>]<sup>4-</sup> Adamantane Clusters
作者:Pantelis N. Trikalitis、Krishnaswamy K. Rangan、Mercouri G. Kanatzidis
DOI:10.1021/ja017245b
日期:2002.3.1
platinum-germanium chalcogenide and platinum-tin selenide frameworks were prepared by linking corresponding [Ge(4)Q(10)](4)(-) (Q = S, Se) and [Sn(4)Se(10)](4)(-) clusters with Pt(2+) ions. The non-oxidic honeycombs designated as C(n)PyPtGeQ and C(n)PyPtSnSe were templated by the lyotropic liquid-crystalline phase of alkylpyridinium surfactant [C(n)H(2)(n)(+1)NC(5)H(5)]Br (C(n)PyBr) with n= 12, 14, 16, 18