14104-20-2Relevant articles and documents
Ethylene sensing by silver(I) salt-impregnated luminescent films
Santiago Cintron, Michael,Green, Omar,Burstyn, Judith N.
, p. 2737 - 2746 (2012)
Luminescent oligomers and polymers doped with silver(I) salts were used as optical sensors for ethylene and other gaseous small molecules. Films of poly(vinylphenylketone) (PVPK) or 1,4-bis(methylstyryl)benzene (BMSB) impregnated with AgBF4, AgSbF6, or AgB(C6F 5)4 respond to ethylene exposures with a reversible emission quenching that is proportional to the pressure of the gas. Experiments with various analytes revealed that only gases capable of forming coordinate bonds with Ag(I) ions (i.e., ethylene, propylene, and ammonia) produced a sensing response. Comparison of the effects of ethylene and tetradeuterioethylene revealed that the emission quenching was due to enhanced vibrational relaxation. The Ag(I) ions are essential to the observed optical response. The oligomer/polymer support enhances the response characteristics of the impregnated salt by promoting separation of Ag(I) from its anion, a separation that improves accessibility of the Ag(I) ion to the gaseous analytes. Salts with large lattice energies, where the anion is not dissociated from Ag(I) in the matrix, fail to sensitize film responses. Photoluminescence experiments with Ag(I)-impregnated BMSB films established that the Ag(I) ions serve to communicate the analyte-binding signal to the support by altering the support-based emission. These experiments demonstrate a sensing paradigm where simultaneous coordination of Ag(I) ions to the support matrix and to a gaseous analyte enables the optical response.
Warf
, p. 3702 (1952)
Olah, G.,Quinn, H. W.
, p. 295 - 296 (1960)
Carbon-ionic liquid double-layer capacitors
Lewandowski,Galiński
, p. 281 - 286 (2004)
A series of electrochemical capacitors, based on activated carbon powders (ACP, specific surface area 870 and 2600 m2/g) and ionic liquids as electrolytes, were prepared and tested. The ionic liquids consisted of 1-ethyl-3-methyl imidazolium (EMIm+), 1-butyl-3-methyl imidazolium (BMIm+) and 1-methyl-1-propyl pyrrolidinium (BMPy+) cations, as well as of tetrafluoroborate, hexafluorophosphate and bis((trifluoromethyl)sulfonyl) imide anions. A typical capacitor consisted of two electrodes each with a mass of ca. 15-30 mg, and showed a capacity of ca. 0.35-1.5F; this leads to a specific capacity of the carbon electrode material within the range of 45 (ACP 870 m2/g)-180 F/g (ACP 2600 m 2/g). The specific capacity expressed versus total surface of carbon material was within the range of 5.2-6.9 μF/cm2. The electrochemical stability window of ionic liquids determined at the glassy carbon electrode is within the range of ca. 3.0-4.2 V. The energy stored in a capacitor based on activated carbons and ionic liquids may be high, due to a broad practical electrochemical stability window of ca. 3 V. Ionic liquids are characterised by negligible vapour pressure; such a capacitor emits no volatile organic compounds and may be regarded as environmentally friendly.
Luminescent chains formed from neutral, triangular gold complexes sandwiching Tl(I) and Ag(I)
Burini, Alfredo,Bravi, Rita,Fackler Jr., John P.,Galassi, Rossana,Grant, Tiffany A.,Omary, Mohammad A.,Pietroni, Bianca R.,Staples, Richard J.
, p. 3158 - 3165 (2000)
It has been found that several trinuclear complexes of Au(I) interact with silver and thallium salts to intercalate Ag+ and Tl+ cations, thereby forming chains. The resulting sandwich clusters center the cations between the planar trinuclear moieties producing structures in which six Au(I) atoms interact with each cation in a distorted trigonal prismatic coordination. The resultant (B3AB3B3AB3)(∞) pattern of metal atoms also shows short (~3.0 A) aurophilic interactions between BAB molecular centers. These compounds display a strong visible luminescence, under UV excitation, which is sensitive to temperature and the metal ion interacting with the gold. X-ray crystal structures are reported for Ag([Au(μ-C2,N3-bzim)]3)2BF4·CH2Cl2 (P1, Z = 2, a = 14.4505(1)A; b = 15.098(2)A; c = 15.957(1)A; α = 106.189(3)°; β = 103.551(5)°; γ = 101.310(5)°); Tl([Au(μ-C2,N3-bzim)]3)2PF6·0.5C4H8O (P1, Z = 2, a = 15.2093(1)A; b =15.3931(4)A; c = 16.1599(4)A; α = 106.018(1)°; β = 101.585(2)°; γ=102.068(2)°); and Tl([Au(μ-C(OEt)=NC6H4CH3)]3)2PF6·C4H8O (P2(1)/n, Z = 4, a = 16.4136(3)A; b = 27.6277(4)A; c = 16.7182(1)A; β = 105.644(1)°). Each compound shows that the intercalated cation, Ag+ or Tl+, coordinates to a distorted trigonal prism of six Au(I) atoms. The counteranions reside well apart from the cations between the cluster chains.
catena-poly[silver-μ-(di-2-pyridyl ketone)-N,O:N′,O] tetrafluoroborate
Sommerer,Westcott,Jircitano,Abboud
, p. 1426 - 1428 (1996)
The title complex, [Ag(C11H8N2O)]n+. n(BF4)-, contains polymeric [silver(di-2-pyridyl ketone)]n+ zigzag chains, counterbalanced by BF4-/sup
Synthesis of new allyl palladium complexes bearing purine-based NHC ligands with antiproliferative and proapoptotic activities on human ovarian cancer cell lines
Scattolin, Thomas,Caligiuri, Isabella,Canovese, Luciano,Demitri, Nicola,Gambari, Roberto,Lampronti, Ilaria,Rizzolio, Flavio,Santo, Claudio,Visentin, Fabiano
, p. 13616 - 13630 (2018/10/15)
A series of new palladium allyl complexes bearing purine-based carbenes derived from caffeine, theophylline and theobromine have been prepared and characterized by NMR spectroscopy, and elemental analysis and in two cases by single crystal X-ray diffraction. The cytotoxic and proapoptotic activities of compounds have been determined in vitro on human ovarian cancer A2780 and SKOV-3 cell lines. These experiments have shown that the palladium-allyl fragment induces a general cytotoxicity, but the choice of the supporting ligands is of paramount importance for achieving the best results. In particular complexes 4c, 4d and 5d exhibit a higher antiproliferative effect (IC50: 0.09, 0.81 and 0.85 μM respectively) than cisplatin (IC50: 1.5 μM) on A2780 cells, and 4d (IC50: 1.7 μM vs. 5.94 μM) on SKOV-3 cell line. Moreover in many cases it has been proved that the cytotoxicity of our complexes is associated with the induction of apoptosis.