ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Light-Driven Molecular Shuttle Based on a RotaxaneHiroto Murakami, Atsushi Kawabuchi, Kengo Kotoo, Masashi Kunitake, and Naotoshi NakashimaView Author Information Department of Applied Chemistry Faculty Engineering, Nagasaki University Bunkyo-cho, 852, JapanCite this: J. Am. Chem. Soc. 1997, 119, 32, 7605–7606Publication Date (Web):August 13, 1997Publication History Received5 May 1997Published online13 August inissue 1...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelf-Organized Porphyrin Array on Iodine-Modified Au(111) in Electrolyte Solutions: In Situ Scanning Tunneling Microscopy StudyMasashi Kunitake, Nikola Batina, and Kingo ItayaCite this: Langmuir 1995, 11, 7, 2337–2340Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published inissue 1 July 1995https://pubs.acs.org/doi/10.1021/la00007a002https://doi.org/10.1021/la00007a002research-articleACS PublicationsRequest...

The pursuit of methods for design and preparation robust nanoarchitectonic systems with integrated functionality through bottom-up methodologies remains a driving force in molecular nanotechnology. Through the use π-conjugated covalent bonds, we demonstrate general substrate-mediated, soft solution methodology extended polymeric nanoarchitectures low-dimensions. Based on thermodynamic control over equilibrium polymerization at solid–liquid interface whereby aromatic building blocks...

The structures and dynamic formation processes of adlayers 5,10,15,20-tetrakis(N-methylpyridinium-4-yl)-21H,23H-porphine (TMPyP) on both bare Au(111) iodine-modified in perchloric acid have been investigated detail by using situ scanning tunneling microscopy (STM). Highly-ordered TMPyP arrays formed Au(111), whereas disordered were consistently found surface. High-resolution STM images revealed the characteristic internal shape orientation each molecule ordered adlayers. Time-dependent...

The iodine-modified Ag(111) substrate was employed as an electrode to investigate the adsorption of 5,10,15,20-tetrakis(N-methylpyridinium-4-yl)-21H,23H-porphine tetrakis(p-toluenesulfonate) (TMPyP) in alkaline solution containing KI. It found by using situ scanning tunneling microscopy (STM) that water soluble TMPyP molecules were irreversibly adsorbed and formed highly ordered molecular adlayers on surface within potential range −0.35 −0.10 V vs Ag/AgI. STM images revealed characterstic...

New combinatorial analysis for solution crystal engineering on an open lab-on-a-chip by combining the inkjet method and non-volatile solvents.

A two-dimensional molecular network of trimesic acid on Au(111) was visualized by in situ scanning tunneling microscopy with submolecular resolution. The supramolecular structures including an 'order to order' phase transition were constructed precise potential-controlled adsorption based adsorption-induced self-organization.

Solid-state films of chiral polysilanes undergo an optical inversion (see Figure) above a helix–helix transition temperature, determined by the polymer molecular weight and thermal processing. These could be used for re-writable or write-once, read-many data storage, depending on temperature. Supporting information this article is available WWW under http://www.wiley-vch.de/contents/jc_2089/2004/c0470_s.pdf from author. Please note: The publisher not responsible content functionality any...

Self-assembled structures of melamine and the condensed derivative melem were investigated at aqueous solution-Au(111) interfaces by cyclic voltammetry in situ scanning tunneling microscopy (STM) observation. The adsorption/desorption behaviors both molecules on Au(111) surfaces could be controlled varying electrochemical potential solution concentration. In negative region, self-assembled constructed double hydrogen bonding systems between nitrogen atoms triazine rings amine groups....

Abstract A series of necklace-shaped dimethylsiloxane (DMS) polymers bearing a polyhedral oligomeric silsesquioxane (POSS) cage were synthesized from bifunctional POSS by two different synthetic routes. One-step or two-step polycondensation between and dimethyloligosiloxane dichloride led to necklace with constant chain lengths (n = 2–8). The ring-opening polymerization octamethylcyclotetrasiloxane (D4) was also found provide similar dispersed DMS. thermal properties, decomposition...

Two-dimensional (2D) arrays of π-conjugated aromatic polymers produced by surface-selective Schiff base coupling reactions between an diamine and dialdehyde were investigated in detail using situ scanning tunneling microscopy. Surface-selective was achieved for almost all diamine/dialdehyde combinations attempted, although several did not proceed even homogeneous aqueous alkaline solution. Most the a dialdehyde, except 4,4'-azodianiline with mono/bithiophenedicarboxaldehyde, formed highly...

Different bicomponent self-assembled structures comprising melamine and melem were formed at aqueous solution–Au(111) interfaces by varying the concentrations of electrochemical potential. The observed in situ scanning tunneling microscopy. networks controlled thermodynamically through surface concentration molecular ratio. Interestingly, solution did not directly reflect density because flocculation-like behavior around interface. Furthermore, structural phase transitions between...

"Nanotube" structures of the α-, β-, and γ-cyclodextrins (CyD's), which are similar to that CyD−polyrotaxane, were constructed by potential-controlled adsorption onto Au(111) surfaces in sodium perchlorate solution without a threaded polymer. CyD molecules adsorbed randomly on bare potential control desorption CyD's from Au was observed at negative less than −0.60 V versus SCE. On other hand, specific range between these potentials, ordered molecular arrays with "nanotube" (α-, γ-CyD)...

Isomeric fullerene trimers have been prepared by using a high speed vibration milling technique, and Langmuir films of the isomers observed on Au(111) surfaces scanning tunneling microscopy (STM). Each isomer exhibited different surface morphology. The distribution supports molecular orbital calculations stability. STM may be used to distinguish individual (see image), which is difficult achieve spectroscopy.

Dendritic polymer-modified porous silica particles prepared by a poly(amidoamine) (PAMAM) dendrimer synthesis reaction were characterized elementary analysis (EA) and size exclusion chromatography (SEC). EA demonstrated the successful alternate growth of dendritic layers on particles. The phased polymer moieties cascade reactions filled mesopores decreased limit molecular weight (Mlim) step step. density was affected conditions, such as time, temperature, generation. mesopore particles,...

Qualitative and quantitative analyses of hydrophilic lipophilic antioxidants, such as polyphenols, by simple electrochemical measurements were conducted in a bicontinuous microemulsion (BME), which water oil phases coexisted bicontinuously on microscopic scale. Hydrophilic antioxidants individually monitored the same BME solution using indium tin oxide (ITO) electrode fluorinated nanocarbon film (F-ECR), respectively. The combination well-balanced extremely biased electrodes, ITO F-ECR,...

We demonstrate the fabrication of millimeter-sized single crystals 0D-Cs4PbBr6 grown in a supersaturated solution consisting organic solvents without HBr (aq). One precursors, CsBr, was dissolved ethylene glycol (EG) mixed with dimethyl sulfoxide, which is good solvent for other precursor, PbBr2. At ratio 20 vol % EG, solubility cesium bromide decreased and title compound, Cs4PbBr6, selectively formed, whereas, an EG 80 %, 3D-CsPbBr3 formed. A phase diagram (solubility curve) Cs4PbBr6...

The electrochemical replacement method to form epitaxial adlayers of fullerene on Au(111) surfaces was proposed and demonstrated by in situ STM. new "wet process" consists the transfer Lanmuir films onto iodine-modified at an air−water interface followed removal iodine with solution. prepared this showed excellent quality uniformity, they were essentially same as sublimation.