bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Suzuki Coupling Reactions in Heterocyclic Chemistry: Synthesis of 3‐Substituted Pyrrolines and Pyrroles.
Authors: Hercouet Alain , Neu Andreas , Peyronel Jean‐Francois , Carboni Bertrand 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Facile Synthesis of Homologous 4,4′‐Dialkanoic Acid Substituted 2,2′‐Bipyridines
Authors: Mohler Debra L. , Chen Daitao , Reddy Ven B. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Atropisomeric 1,8‐Bis(4′,4′‐dipyridyl)naphthalenes from 4‐Trimethylstannylpyridines.
Authors: Wolf Christian , Ghebremariam Bereket T. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Biological Activity of Selective Pipecolic Acid‐Based TNF‐α Converting Enzyme (TACE) Inhibitors.
Authors: Letavic Michael A. , et al. et al. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Study of Insertion Reactions with Phosphorus Ylides — On Reactions Between 4‐(4‐Methylphenyl)‐2,3‐benzoxazin‐1‐one and Alkylidene Phosphoranes.
Authors: Abdou Wafaa Mahmoud , Fahmy Amin Farouk Mohammed , Kamel Azza Abdel‐Azeem 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A General Method for the Preparation of 4‐ and 6‐Azaindoles.
Authors: Zhang Zhongxing , Yang Zhong , Meanwell Nicholas A. , Kadow John F. , Wang Tao 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Novel N‐(2‐Benzo[b]thienyl)iminophosphoranes and Their Use in the Synthesis of Benzo[b]thieno[2,3‐b]pyridines.
Authors: Bonini Carlo , D'Auria Maurizio , Funicello Maria , Romaniello Gianfranco 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Amino Acid Derived Intramolecular 1,3‐Dipolar Cycloadditions that Form Bridged Medium Ring Systems with Diastereoselective Control.
Authors: Liu Yanbin , Maden Amy , Murray William V. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Allylic Phosphates and Allylic Phosphinates as Electrophiles in Efficient Silylcupration Reactions of Acetylenes.
Authors: Liepins Vilnis , Karlstroem A. Sofia E. , Baeckvall Jan‐E. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Chiral 4‐Nitrophenyl Alkyl Methylphosphonothioates: BF3×Et2O‐Catalyzed Alcoholysis of Phosphonamidothioates.
Authors: Reddy Putta Mallikarjuna , Kovach Ildiko M. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Bis(2,4‐diarylimidazol‐5‐yl) Diselenides from N‐Benzylbenzimidoyl Isoselenocyanates.
Authors: Atanassov Plamen K. , Zhou Yuehui , Linden Anthony , Heimgartner Heinz 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Facile Synthesis of N,N‐Dialkylselenoamides from Amides.
Authors: Koketsu Mamoru , Okayama Yoshihiro , Aoki Hiroshi , Ishihara Hideharu 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Preparation and Characterization of Cu‐Doped p‐CdTe Films Grown by Cathodic Electrodeposition.
Authors: Takahashi Makoto , Muramatsu Yasuhiko , Watanabe Makoto , Wakita Koichi , Miyuki Takuhiro , Ikeda Shoichiro 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Asymmetric Addition of Diethylzinc to Aromatic Aldehydes by Chiral Ferrocene‐Based Catalysts.
Authors: Kim Tae‐Jeong , Lee Hee‐Yeol , Ryu Eun‐Sook , Park Dong‐Kyu , Cho Chan Sik , Shim Sang Chul , Jeong Hong Hwa 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
The Reactivity of 3‐Methyl‐4‐nitro‐5‐styrylisoxazole with Some Bis‐enolizable Ketones.
Authors: Adamo Mauro F. A. , Chimichi Stefano , De Sio Francesco , Donati Donato , Sarti‐Fantoni Piero 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
A Practical One‐Pot Synthesis of 2‐[2‐(Pyridylmethyl)‐thio]‐1H‐benzimidazoles.
Authors: Rane R. A. , Pathak R. K. , Kaushik C. P. , Rao K. V. V. Prasad , Kumar Ashok 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Photocyclization of Styrylbenzo[a]quinolizinium Salts. Part 3. Novel Five‐Membered Ring Formation by Oxidative Photocyclization of 4‐(2‐Arylvinyl)benzo[a]quinolizinium Salts.
Authors: Arai Sadao , Yoda Hiroe , Sato Kiyoshi , Yamagishi Takamichi 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Triazoles. Part 44. Synthesis of New Ring Systems Containing Imidazo[2′,1′:3,4][1,2,4]triazolo[1,5‐a]pyrimidine and Imidazo[1′,2′:2,3][1,2,4]triazolo[1,5‐a]pyrimidine Skeleton.
Authors: Berecz Gabor , Reiter Jozsef , Argay Gyula , Kalman Alajos 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Free Radical Reaction of Sodium Arenesulfinates with Acetylenes: New Regio‐ and Stereoselective Preparation of (E)‐β‐(Phenylseleno)vinyl Sulfones.
Authors: Huang Xian , Xu Qing , Liang Chun‐Gen , He Qi‐Weng 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of (+)‐Polyoxamic Acid and D‐Sorbitol from Simple Achiral Allylic Halides Employing (S,S)‐Hydrobenzoin as a Chiral Source.
Authors: Kim Kwan Soo , Lee Yong Joo , Kim Jin Hwan , Sung Da Kyung 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Comparative QSAR and the Radical Toxicity of Various Functional Groups
Authors: Selassie Cynthia D. , Garg Rajni , Kapur Sanjay , Kurup Alka , Verma Rajeshwar P. , Mekapati Suresh Babu , Hansch Corwin 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis, Structure, and Magnetic Properties of CeNiIn2.
Authors: Zaremba Vasyl' I. , Kalychak Yaroslav M. , Tyvanchuk Yuriy B. , Hoffmann Rolf‐Dieter , Moeller Manfred H. , Poettgen Rainer 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Di‐ and Tricobalt Dawson Sandwich Complexes: Synthesis Spectroscopic Characterization, and Electrochemical Behavior of Na18 [(NaOH2)2Co2 (P2W15O56)2] and Na17 [(NaOH2)Co3(H2O) (P2W15O56)2].
Authors: Ruhlmann Laurent , Canny Jacqueline , Contant Roland , Thouvenot Rene 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Utility of the 3,3‐Dimethyl‐5‐substituted‐2‐pyrrolidinone “Quat” Chiral Auxiliary.
Authors: Davies Stephen G. , Dixon Darren J. , Doisneau Gilles J.‐M. , Prodger Jeremy C. , Sanganee Hitesh J. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Asymmetric Desymmetrization of 2‐Substituted 1,3‐Propanediols by Using Oxazaborolidinone‐Mediated Enantioselective Ring‐Cleavage of Prochiral Acetal Derivatives.
Authors: Harada Toshiro , Imai Keiko , Oku Akira 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of (E)‐α,β‐Unsaturated Esters and (Z)‐Vinyl Halides with Total or High Diastereoselectivity by Using Samarium Metal.
Authors: Concellon Jose M. , Rodriguez‐Solla Humberto , Huerta Monica , Perez‐Andres Juan A. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Influence of Hydrogen Bonding in the Activation of Nucleophiles: PhSH—(Catalytic) KF in N‐Methyl‐2‐pyrrolidone as an Efficient Protocol for Selective Cleavage of Alkyl/Aryl Esters and Aryl Alkyl Ethers under Nonhydrolytic and Neutral Conditions.
Authors: Chakraborti Asit K. , Sharma Lalima , Nayak Mrinal K. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
An Efficient Method for Selective Deprotection of Trimethylsilyl Ethers, Tetrahydropyranyl Ethers, Ethylene Acetals and Ketals under Solvent‐Free Conditions.
Authors: Hajipour Abdol R. , Mallakpour Shadpour E. , Mohammadpoor‐Baltork I. , Khoee S. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Solid Supported Fluoronitroaryl Triazenes as Immobilized and Convertible Sanger Reagents — Synthesis and SNAr Reactions Towards a Novel Preparation of 1‐Alkyl‐5‐nitro‐1H‐benzotriazoles.
Authors: Lormann Matthias E. P. , Walker Catherine H. , Es‐Sayed Mazen , Braese Stefan 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Diastereo‐ and Enantioselective Direct Catalytic Aldol Reaction of 2‐Hydroxyacetophenones with Aldehydes Promoted by a Heteropolymetallic Complex: Catalytic Asymmetric Synthesis of anti‐1,2‐Diols.
Authors: Yoshikawa Naoki , Suzuki Takeyuki , Shibasaki Masakatsu 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Halogenolactamization of 2‐(3‐Butenyl)‐1,3‐oxazolines to Bifunctional γ‐ and δ‐Lactams
Authors: Terao Keiji , Takechi Yumiko , Kunishima Munetaka , Tani Shohei , Ito Akiko , Yamasaki Chisa , Fukuzawa Shin‐ichi 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
A Convenient Synthesis of 3,5‐Diarylthieto[2,3‐d]thiazole‐2‐thiones, and Expansion of Their Thiete Ring with Carbon Disulfide.
Authors: Yadav L. D. S. , Dubey Suman , Singh Smita 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Tandem Ene‐Reaction/Intramolecular Sakurai Cyclization (IMSC): A Novel Access to Polysubstituted Tetrahydropyrans and γ‐Butyrolactones Using a Unique Allylation Strategy.
Authors: Marko Istvan E. , Dumeunier Raphael , Leclercq Cedric , Leroy Bernard , Plancher Jean‐Marc , Mekhalfia Abdelaziz , Bayston Daniel J. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
endo‐Oxacyclizations of Polyepoxides: Biomimetic Synthesis of Fused Polycyclic Ethers.
Authors: McDonald Frank E. , Bravo Fernando , Wang Xia , Wei Xudong , Toganoh Motoki , Rodriguez J. Ramon , Do Bao , Neiwert Wade A. , Hardcastle Kenneth I. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
A Novel Route to Spiro Phosphorus‐Heterocycle via Lawesson′s Reagent.
Authors: He Liangnian , Luo Yanping , Li Kai , Ding Mingwu , Lu Aihong , Liu Xiaopeng , Wu Tianjie , Cai Fei 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Vitamin D3: Synthesis of seco C‐9,11,21‐trisnor‐17‐Methyl‐1α,25‐dihydroxyvitamin D3 Analogues.
Authors: Wu Yusheng , Sabbe Katrien , De Clercq Pierre , Vandewalle Maurits , Bouillon Roger , Verstuyf Annemieke 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of New Macrocyclic Aminomethylphosphines Based on 4,4′‐Diaminodiphenylmethane and Its Derivatives.
Authors: Kuznetsov R. M. , Balueva A. S. , Litvinov I. A. , Gubaidullin A. T. , Nikonov G. N. , Karasik A. A. , Sinyashin O. G. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Stereoselective Preparation of (E)‐(1,2‐Difluoro‐1,2‐ethenediyl) Bis[tributylstannane] and Stereospecific Synthesis of (E)‐1,2‐Difluorostilbenes.
Authors: Liu Qibo , Burton Donald J. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Radamycin, a Novel Thiopeptide Produced by Streptomyces sp. RSP9. Part 1. Taxonomy, Fermentation, Isolation and Biological Activities.
Authors: Gonzalez Holgado Gloria , Castro Rodriguez Julian , Canedo Hernandez Librada M. , Diaz Margarita , Fernandez‐Abalos Jose Manuel , Trujillano Ignacio , Santamaria Ramon I. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
Catalytic FeCl3‐ or Yb(OTf)3‐Mediated Synthesis of Substituted Tetrahydrofurans and C‐Aryl Glycosides from 1,4‐Diols.
Authors: Sharma G. V. M. , Kumar K. Raman , Sreenivas Punna , Krishna Palakodety Radha , Chorghade Mukund S. 
Published: May 2010

AbstractFor Abstract see ChemInform Abstract in Full Text.
2,3,4,7,8-pentachlorodibenzofuran is a more potent cytochrome P4501A inducer than 2,3,7,8-tetrachlorodibenzo-p-dioxin in herring gull hepatocyte cultures
Authors: Hervé Jessica C. , Crump Doug L.D. , McLaren Kristina K. , Giesy John P. , Zwiernik Matthew J. , Bursian Steven J. , Kennedy Sean W. 
Published: May 2010

AbstractConcentration-dependent effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), 2,3,4,7,8-pentachlorodibenzofuran (PeCDF), and 2,3,7,8-tetrachlorodibenzofuran (TCDF) on cytochrome P4501A (CYP1A) induction were determined in primary cultures of embryonic herring gull (Larus argentatus) hepatocytes exposed for 24 h. Based on the concentration that induced 50% of the maximal response (EC50), the relative potencies of TCDD and TCDF did not differ by more than 3.5-fold. However, also based on the EC50, PeCDF was 40-fold, 21-fold, and 9.8-fold more potent for inducing ethoxyresorufin-O-deethylase (EROD) activity, CYP1A4 mRNA expression, and CYP1A5 mRNA expression than TCDD, respectively. The relative CYP1A-inducing potencies of PeCDF and of other dioxin-like chemicals (DLCs) in herring gull hepatocytes (HEH RePs), along with data on concentrations of DLCs in Great Lakes herring gull eggs, were used to calculate World Health Organization toxic equivalent (WHO-TEQ) concentrations and herring gull embryonic hepatocyte toxic equivalent (HEH-TEQ) concentrations. The analysis indicated that, when using avian toxic equivalency factors (TEFs) recommended by the WHO, the relative contribution of TCDD (1.1–10.2%) to total WHO-TEQ concentration was higher than that of PeCDF (1.7–2.9%). These results differ from the relative contribution of TCDD and PeCDF when HEH RePs were used; PeCDF was a major contributor (36.5–52.9%) to total HEH-TEQ concentrations, whereas the contribution by TCDD (1.2–10.3%) was less than that of PeCDF. The WHO TEFs for avian species were largely derived from studies with the domestic chicken (Gallus gallus domesticus). The findings of the present study suggest that it is necessary to determine the relative potencies of DLCs in wild birds and to re-evaluate their relative contributions to the biochemical and toxic effects previously reported in herring gulls and other avian species. Environ. Toxicol. Chem. 2010;29:2088–2095. © 2010 SETAC
Numerical estimation of mixed convection heat transfer in vertical helically coiled tube heat exchangers
Authors: Mirgolbabaei Hessam , Taherian Hessam , Domairry G. , Ghorbani N. 
Published: May 2010

AbstractA numerical investigation of the mixed convection heat transfer from vertical helically coiled tubes in a cylindrical shell at various Reynolds and Rayleigh numbers, various coil‐to‐tube diameter ratios and non‐dimensional coil pitches was carried out. The particular difference in this study compared with other similar studies is the boundary conditions for the helical coil. Most studies focus on constant wall temperature or constant heat flux, whereas in this study it was a fluid‐to‐fluid heat exchanger. The purpose of this article is to assess the influence of the tube diameter, coil pitch and shell‐side mass flow rate on shell‐side heat transfer coefficient of the heat exchanger. Different characteristic lengths were used in the Nusselt number calculations to determine which length best fits the data and finally it has been shown that the normalized length of the shell‐side of the heat exchanger reasonably demonstrates the desired relation. Copyright © 2010 John Wiley & Sons, Ltd.
A novel Cartesian cut cell solver for incompressible viscous flow in irregular domains
Authors: Luo X. L. , Lei K. B. , Gu Z. L. , Wang S. , Kase K. 
Published: May 2010

AbstractA Cartesian cut cell solver with solution‐based adaptive mesh refinement is developed for simulating viscous, incompressible flows with arbitrary complex geometries. The cut cells are automatically generated using Volume CAD (VCAD), a framework for storing geometric and material attribute data. Unlike earlier cut cell methods, this solver organizes the cutting patterns into only six categories and further subdivides the resulting pentagon into two quadrilaterals, such that mesh data can be stored by uniform data structure and the post‐processing of flow data can be handled conveniently. A novel method is proposed to treat minuscule cut cells without the process of cell merging. A collocated finite volume method, which can be used even when multiple cell shapes and orthogonal and non‐orthogonal grids exist in the decomposition, is employed to discretize the Navier–Stokes equations. A modified SIMPLE‐based smoothing pressure correction scheme is applied in this cut cell method to suppress checkerboard pressure oscillations caused by collocated arrangement. The solver is first used to simulate a channel flow to demonstrate its calculation accuracy expressed with L1 and L∞ norm errors and then the method is utilized to solve three benchmark problems of flow and heat transfer within irregular domains to verify its feasibility, efficiency, accuracy and potential in engineering applications. Copyright © 2010 John Wiley & Sons, Ltd.
Exploring process capability with Mathematica
Authors: Spiring Fred 
Published: May 2010

AbstractSeveral methods for estimating, assessing and monitoring process capability are illustrated using the software package Mathematica 7 (Mathematica 7. Wolfram Media: Champaign, IL, 2009). Graphical techniques that allow assessment of the underlying distributional properties of the process data as well as process capability are presented and illustrated. Several new conventions are proposed that attempt to provide insights into the process with diagnostic tools useful for, but not limited to the manufacturing sector. Several estimation and inferential techniques for the more common indices are presented with tools for determining associated values and the resulting inferences. This notebook is best viewed using Mathematica 7 or Mathematica Player 7. Mathematica Player 7 is a free download available at www.Wolfram.com/products/player/ that allows all features of the notebook to be viewed. Copyright © 2010 John Wiley & Sons, Ltd.
The Storing Matter technique: Application to PVC using Au and Ag collectors
Authors: Becker N. , Wirtz T. , Migeon H.‐N. 
Published: May 2010

AbstractThe Storing Matter technique has been developed to perform quantitative surface analysis with high sensitivity. This technique consists in decoupling the sputtering of the specimen from the subsequent analysis step. In the recently developed prototype instrument, the sample surface is sputtered by an ion beam and the emitted particles are deposited at submonolayer level on a dedicated collector under UHV conditions. In a second step, the matter deposited on the collector is analyzed by SIMS in dynamic or static mode. The chemical nature of the collector surface is chosen with regard to the subsequent SIMS analysis (high or low work function to enhance positive or negative ionization, metallic overlayer for optimized organic information by cationization, etc.) by depositing thin films by electron beam evaporation.This paper presents the first results obtained on PVC samples with the Storing Matter prototype instrument. The chosen collector surfaces were Au and Ag, which are known to enhance cationization in static SIMS. The positive mass spectra obtained from Storing Matter deposits on these collectors were compared to those recorded on a PVC reference sample, on a PVC sample covered with a thin metallic overlayer, on a PVC thin film deposited on a metal substrate, and on the pristine collectors. This study showed that the Storing Matter technique allows for a clear identification of the PVC deposit on the Ag collector, while identification was impossible in the case of the Au collector due to a high degree of organic contaminations on the pristine collector. Copyright © 2010 John Wiley & Sons, Ltd.
Layer‐by‐layer engineered polyelectrolyte microcapsules studied by ToF‐SIMS and related analytical techniques
Authors: Yin Yu‐Sheng , Lei Shiou‐Ling , Chen Yu‐Wen , Ling Yong‐Chien 
Published: May 2010

AbstractEngineered polyelectrolyte multilayer (PEM) films of polyallylamine hydrochloride (PAH) and polystyrene sulfonate (PSS) assembled on polyethylene terephthalate (PET) substrate as well as PEM microcapsules of PAH and PSS templated onto polystyrene latex were fabricated through a layer‐by‐layer assembly and characterized by various analytical techniques. The characteristic ion intensities from the respective outermost layer obtained by ToF‐SIMS accorded well with the layer composition. The S and C8H7SO3 ion intensities were higher in PSS layers; whereas Cl ion intensity was higher in PAH layers. The SEM image displayed morphology which involved electrostatic interactions during the formation of the multilayer. AFM measurement showed the shell thickness of PEM microcapsules as 1.21 nm. ToF‐SIMS total ion, S ion, and Cl ion images were useful to delineate the PEM microcapsules location and to indicate successful assembly. The results demonstrated for the first time the feasibility of label‐free ToF‐SIMS imaging of PEM microcapsules. Copyright © 2010 John Wiley & Sons, Ltd.