Reference

Cation-binding properties of new armed macrocyclic host molecules and their applications to phase-transfer reactions and cation membrane transport

Cation-binding properties of new armed macrocyclic host molecules and their applications to phase-transfer reactions and cation membrane transport. Tsukube, Hiroshi; Takagi, Kentaro; Higashiyama, Tatsuo; Iwachido, Tadashi; Hayama, Naomi (Coll. Lib.In this study，5271-67-0 is also used. Arts Sci., Okayama Univ., Okayama 700, Japan). J. Chem. Soc., Perkin Trans. 1, (6), 1033-7 (English) 1986. CODEN: JCPRB4. ISSN: 0300-922X. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Armed macrocyclic host mols. I (R = Ph, 2-furyl, 2-thienyl) and II (R1 = Ph, 2-furyl) were prepd. and characterized by cation-ligated donor arms. Their cation-binding properties were significantly controlled by the coordination characteristics of the parent ring and donor side-arms, and chem. modifications of their basic structures provided interesting chem. functions. Thus, I (R = 2-furyl) showed high catalytic activity in some phase-transfer reactions: II (R1 = 2-furyl) effectively distinguished NH4+ from K+ and other related cations . Such chem. functions were not attained with common crown ethers and cryptands. Hence, further variations of ligand structures may lead to a new series of host mols. showing unique and important chem. functions. .

Electrochemical and coupled XPS studies on Langmuir-Blodgett mixed films of behenic acid and over-grafted platinum nanoparticles: Effect of the behenic acid removal

All Rights Reserved. Electrochemical and coupled XPS studies on Langmuir-Blodgett mixed films of behenic acid and over-grafted platinum nanoparticles: Effect of the behenic acid removal. Cavaliere-Jaricot, Sara; Etcheberry, Arnaud; Herlem, Michel; Perez, Henri (Institut Lavoisier (IREM-CNRS, UMR 8637), Universite de Versailles Saint Quentin en Yvelines, Versailles 78035, Fr.). Progress in Solid State Chemistry, 34(2-4), 77-85 (English) 2006 Elsevier Ltd. CODEN: PSSTAW. ISSN: 0079-6786. DOCUMENT TYPE: Journal CA Section: 66 (Surface Chemistry and Colloids) Section cross-reference(s): 72, 73 The authors report on the behavior of Pt nanoparticles functionalized with 4-mercaptoaniline over-grafted with 2-thiophenecarbonyl chloride. Stable Langmuir-Blodgett (LB) mixed films were built up from these particles with behenic acid (BHA). Such ultra-thin films were transferred onto Au substrates, which allowed the study of their electrochem. response towards Fe[(CN)6]3- and their XPS chem. anal. before and after the BHA removal. After washing, XPS anal. showed that the signals corresponding to the metal core and the capping agent were almost unchanged.There are some commonly used reagents with their cas registry numbers 5271-67-0 and 7440-06-4 in this article. Also, the layers became more compact, as shown by the Pt/Au intensity ratio decrease, because of the apparent decrease of length escape of electrons coming from Au, evidencing the removal of the fatty acid in the LB film structure. After BHA removal, the resulting electrochem. activity slightly increased. This result, in agreement with XPS anal., showed the structural rearrangement within the film that facilitated the percolation between the particle domains. .