bluuebunny/crossref_metadata_2025_split huggingface dataset:
MECHANICAL PROPERTIES AND CURE TEST OF A NATURAL RUBBER/POLY(VINYL ALCOHOL) BLEND
Authors: Riyajan Sa-Ad , Chaiponban Suwit , Chusri Sasitorn , Voravuthikunchai Supayang Piyawan 
Published: February 2012

Abstract
Properties and antibacterial activity of polymer blend films prepared from polyvinyl alcohol (PVA) and natural rubber (NR) blends, in the presence of maleic acid as a cross-linking agent were studied. The effect of the maleic acid content, curing temperature, and curing time on the properties of the polymer blend was investigated. Cross-linking between PVA and maleic acid was observed by attenuated total reflection mode–Fourier transform infrared spectroscopy at 1152 cm−1. The swelling ratio of the polymer blend decreased as a function of the increase of the maleic acid content. The tensile strength of the polymer blend increased with an increase of both the maleic acid and the curing time. The highest tensile strength of the samples was observed with 40% w/w maleic acid after a 24 h curing time at 120 °C. The elongation at the break of 60/40 NR/PVA was ∼500% at 120 °C for 1 h. In addition, the polymer blend showed good antibacterial activity with Staphylococcus aureus ATCC25923, Escherichia coli ATCC25922, and Acinetobacter baumannii JVC 1053 and could find many applications.
The Preparation of (2R,5S)‐2‐t‐Butyl‐3,5‐Dimethylimidazolidin‐4‐One
Authors: Graham Thomas H. , Horning Benjamin D. , MacMillan David W. C. 
Published: February 2012

AbstractAcetyl chlorideL‐Alanine methyl ester hydrochlorideBenzyl chloroformate, carbobenzoxy chlorideMethylaminePivaldehyde, trimethylacetaldehydeTriethylamine,N,N‐diethyl‐ethanamine
Discussion Addendum for: Asymmetric Synthesis of (M)‐2‐Hydroxymethyl‐1‐(2‐Hydroxy‐4,6‐Dimethylphenyl)NaphthaleneVIAAConfigurationally Unstable Biaryl Lactone
Authors: Bringmann G. , Gulder T.A.M. , Gulder T. 
Published: February 2012

Abstract(M)‐2‐hydroxymethyl‐1‐(2‐hydroxy‐4,6‐dimethylphenyl)naphthalene6’‐O‐methylknipholonekorupensamine Akorupensamine Bknipholoneisokotanin Abenanomicin BO‐nucleophilemastigophorene Amastigophorene B(+)‐isoschizandrine [(M)‐35]
Discussion Addendum for: Palladium Catalyzed Cross‐Coupling of (
Z
)‐1‐Heptenyldimethylsilanol with 4‐Iodoanisole: (
Z
)‐(1‐Heptenyl)‐4‐Methoxybenzene
Authors: Denmark Scott E. , Liu Jack Hung‐Chang 
Published: February 2012

Abstract

(
Z
)‐1‐heptenyldimethylsilanol

4‐iodoanisole

(
Z
)‐(1‐heptenyl)‐4‐methoxybenzene

(+)‐brasilenyne

1,4‐bissilyl‐1,3‐butadiene

papulacandin D
Phosphine‐Catalyzed [3 + 2] Annulation: Synthesis of Ethyl 5‐(tert‐Butyl)‐2‐Phenyl‐1‐Tosyl‐3‐Pyrroline‐3‐Carboxylate
Authors: Andrews Ian P. , Kwon Ohyun 
Published: February 2012

AbstractEthyl 5,5‐dimethylhexa‐2,3‐dienoateEthyl (triphenylphosphoranylidene)acetate3,3‐Dimethylbutyryl chlorideTriethylamineEthyl 5‐(tert‐butyl)‐2‐phenyl‐1‐tosyl‐3‐pyrroline‐3‐carboxylate (E)‐N‐Benzylidene‐4‐methylbenzenesulfonamideTributylphosphine
Discussion Addendum for: 5‐ENDO‐TRIGCyclization of 1,1‐Difluoro‐1‐Alkenes: Synthesis of 3‐Butyl‐2‐Fluoro‐1‐Tosylindole (1H‐Indole, 3‐Butyl‐2‐Fluoro‐1‐[(4‐Methylphenyl)Sulfonyl]‐)
Authors: Ichikawa Junji 
Published: February 2012

Abstract1,1‐difluoro‐1‐alkenes3‐butyl‐2‐fluoro‐1‐tosylindole (1H‐indole, 3‐butyl‐2‐fluoro‐1‐[(4‐methylphenyl)sulfonyl]‐)dialkyl(2,2‐difluorovinyl)boraneN‐butylmagnesio‐o‐iodoanilineo‐iodo‐p‐toluenesufonanilide
Synthesis of (S,S)‐Diisopropyl Tartrate (E)‐Crotylboronate and Its Reaction with Aldehydes: (2R,3R,4R)‐1,2‐Dideoxy‐2‐Ethenyl‐4,5‐O‐(1‐Methylethylidene)‐Xylitol
Authors: Sun Huikai , Roush William R 
Published: February 2012

AbstractPotassiumtert‐butoxideTrans‐buteneTriisopropylborane(S,S)‐Diisopropyl tartrate ((S,S)‐DIPT)(S,S)‐Diisopropyl tartrate (E)‐crotylboronate(R,R)‐Diisopropyl tartrate (E)‐crotylboronate(S,S)‐Diisopropyl tartrate (Z)‐crotylboronate(R,R)‐Diisopropyl tartrate (Z)‐crotylboronateD‐(R)‐glyceraldehyde acetonide(3R,4R,5R)‐3‐Methyl‐5,6‐O‐isopropylidene‐hex‐1‐ene‐4‐ol ((2R,3R,4R)‐1,2‐dideoxy‐2‐ethenyl‐4,5‐O‐(1‐methylethylidene)‐xylitol(3S,4S,5R)‐3‐Methyl‐5,6‐O‐isopropylidene‐hex‐1‐ene‐4‐ol(3S,4R,5R)‐3‐Methyl‐5,6‐O‐isopropylidene‐hex‐1‐ene‐4‐ol
Cu‐Catalyzed Azide‐Alkyne Cycloaddition: Preparation of Tris((1‐Benzyl‐1
H
‐1,2,3‐Triazolyl)Methyl)Amine
Authors: Hein Jason E. , Krasnova Larissa B. , Iwasaki Masayuki , Fokin Valery V. 
Published: February 2012

Abstract

Tripropargylamine

Benzyl azide

Copper(II) acetate, monohydrate

Sodium ascorbate
Discussion Addendum for: Synthesis of Indoles By Palladium Catalyzed Reductive
N
‐Heteroannulation of 2‐Nitrostyrenes: Methyl Indole‐4‐Carboxylate
Authors: Södeberg Björn C. 
Published: February 2012

Abstract

triphenylphosphine

triphenylphosphine oxide

3,4,7,8‐tetramethyl‐1,10‐phenanthroline

palladium ditrifluoroacetate

bis(diphenylphosphino)propane

Pinacolborane

3‐methyl‐1‐azatricyclo[5.2.1.0]decane
Synthesis of (
S
)‐8
a
‐Methyl‐3,4,8,8
a
‐Tetrahydro‐1,6‐(2
H
,7
H
)‐Naphthalenedione via

N

‐tosyl‐(

S

a

)‐binam‐l‐prolinamide Organocatalysis
Authors: Bradshaw Ben , Etxebarria‐Jardí Gorka , Bonjoch Josep , Viózquez Santiago F. , Guillena Gabriela , Nájera Carmen 
Published: February 2012

Abstract

(
S
)‐8a‐Methyl‐3,4,8,8a‐tetrahydro‐1,6(2
H
,7
H
)‐naphtalenedione

2‐Methyl‐2‐(3‐oxobutyl)‐1,3‐cyclohexanedione

2‐Methyl‐1,3‐cyclohexanedione

N
‐Tosyl‐(

S
a

)‐binam‐L‐prolinamide

Methyl vinyl ketone
Stereoselective Nickel‐Catalyzed 1,4‐Hydroboration of 1,3‐Dienes
Authors: Ely Robert J. , Morken James P. 
Published: February 2012

Abstract

Methyltriphenylphosphonium bromide

Potassium
tert
‐butoxide

(
E
)‐Deca‐1,3‐diene

(
Z
)‐Dec‐2‐en‐1‐ol

Hydrogen peroxide

trans
‐2‐Nonenal

Ni(cod)
2
Bis(cyclooctadiene)nickel(0)

Tricyclohexylphosphine

4,4,5,5‐Tetramethyl‐1,3,2‐dioxaborolane
Synthesis of 2,3‐Disubstituted Indoles via Palladium‐Catalyzed Annulation of Internal Alk Ynes: 3‐Methyl‐2‐(Trimethylsilyl)Indole
Authors: Chen Yu , Markina Nataliya A. , Yao Tuanli , Larock Richard C. 
Published: February 2012

Abstract

Palladium acetate

Triphenylphosphine

Sodium carbonate

Tetra‐
n
‐butylammonium chloride
N,N
‐Dimethylformamide
1‐Trimethylsilyl‐1‐propyne
An IntramolecularAmination of Aryl Halides with a Combination of Copper (I) Iodide and Cesium Acetate: Preparation of 5,6‐Dimethoxyindole‐1,2‐Dicarboxylic Acid 1‐Benzyl Ester 2‐Methyl Ester
Authors: Noji Toshiharu , Okano Kentaro , Fukuyama Tohru , Tokuyama Hidetoshi 
Published: February 2012

Abstract

6‐Bromoveratraldehyde

Acetic acid, 2‐(dimethoxyphosphinyl)‐2‐[[(phenylmethoxy)carbonyl]‐

amino]‐, methyl ester
1,1,3,3‐Tetramethylguanidine

Dichloromethane

Cesium acetate

Copper(I) iodide

Dimethyl sulfoxide
(

R

)‐3,3′‐bis(9‐Phenanthryl)‐1,1′‐Binaphthalene‐2,2′‐Diyl Hydrogen Phosphate
Authors: Hu Wenhao , Zhou Jing , Xu Xinfang , Liu Weijun , Gong Liuzhu 
Published: February 2012

Abstract

(
R
)‐(+)‐2,2′‐Bis(methoxymethoxy)‐1,1′‐binaphthyl
n
‐Butyllithium

Iodine 9‐Phenanthreneboronic acid

Tetrakis(triphenylphosphine) palladium(0)

Phosphorus oxychloridea (
R
)‐2,2′‐Bis(methoxymethoxy)‐3,3′‐diiodo‐1,1′‐ binaphthalene (
R
)‐2,2′‐Bis(methoxymethoxy)‐3,3′‐bis(9‐phenanthryl)‐1,1′‐binaphthalene (
R
)‐3,3′‐Bis(9‐phenanthryl)‐1,1′‐binaphthalene‐2,2′‐diol (
R
)‐3,3′‐Bis(9‐phenanthryl)‐1,1′‐binaphthalene‐2,2′‐diyl hydrogen phosphate
Mild Conversion of Tertiary Amides to Aldehydes using Cp
2
Zr(H)Cl (Schwartz's Reagent)
Authors: W. Leighty Matthew , T. Spletstoser Jared , I. Georg Gunda 
Published: February 2012

Abstract

Diethylamine

Zirconocene chloride hydride

3,4,5‐Trimethoxybenzoyl chloride

3,4,5‐Trimethoxybenzaldehyde

N,N
‐Diethyl‐3,4,5‐trimethoxybenzamide
A Longitudinal Study of English as Foreign Language Learning: L1 Predictors in Italian Students
Authors: Ferrari Marcella , Palladino Paola 
Published: February 2012

SummaryThe present paper reports findings from a longitudinal study examining the development of English as foreign language learning in a sample of 86 Italian students tested at Grade 6 (mean age 11:3) and Grade 8 (mean age 13:3) . Two measures were examined: one relating to sustained learning ( i.e., English learning attainment), and one to short period development,(i.e., change in English proficiency). Different pattern of predictors were identified among L1 reading (speed and comprehension) and mathematics skills. The main findings indicated that calculation components of mathematics skills and reading comprehension predicted English learning attainments at Grade 8, whilst L1 reading speed at Grade 6 strongly predicted changes in English learning proficiency. The theoretical and empirical implications of the results are discussed in the specificity of a learning direction from a transparent L1 to a non‐transparent L2. Copyright © 2012 John Wiley & Sons, Ltd.
Inverse optimal neural control for a class of discrete‐time nonlinear positive systems
Authors: Leon Blanca S. , Alanis Alma Y. , Sanchez Edgar N. , Ruiz‐Velazquez Eduardo , Ornelas‐Tellez Fernando 
Published: February 2012

SUMMARYIn this paper, a discrete‐time inverse optimal trajectory tracking for a class of nonlinear positive systems is proposed. The scheme is developed for MIMO affine discrete‐time positive nonlinear systems. This optimal controller is based on discrete time passivity and positive systems theory. The advantage of this scheme is that it avoids solving the associated Hamilton–Jacobi–Bellman equation and minimizes a meaningful cost function. The affine discrete‐time positive nonlinear system is obtained from an online neural identifier, which uses a recurrent neural network, trained with the extended Kalman filter. The applicability of the proposed approach is illustrated via simulation by trajectory tracking control of type 1 diabetes mellitus patients. Copyright © 2012 John Wiley & Sons, Ltd.
An adaptive approach to the range‐only station‐keeping problem
Authors: Cao Ming , Stephen Morse A. 
Published: February 2012

SUMMARYWith the use of concepts from switched adaptive control theory plus a special parameterization of the class of 2 × 2 nonsingular matrices, a tractable and provably correct solution is given to the three landmark station‐keeping problems in the plane in which range measurements are the only sensed signals upon which station keeping is to be based. The performance of the overall system degrades gracefully in the face of increasing measurement and misalignment errors, provided that the measurement errors are not too large. Copyright © 2012 John Wiley & Sons, Ltd.
State‐of‐the‐art and progress in the optimization‐based simultaneous design and control for chemical processes
Authors: Yuan Zhihong , Chen Bingzhen , Sin Gürkan , Gani Rafiqul 
Published: February 2012

AbstractSignificant progress in the area of simultaneous design and control for chemical processes has been achieved and various methodologies have been put forward to address this issue over the last several decades. These methods can be classified in two categories (1) controllability indicator‐based frameworks that are capable of screening alternative designs, and (2) optimization‐based frameworks that integrate the process design and control system design. The major objective is to give an up‐to‐date review of the state‐of‐the‐art and progress in the challenging area of optimization‐based simultaneous design and control. First, motivations and significances of simultaneous design and control are illustrated. Second, a general classification of existing methodologies of optimization‐based simultaneous design and control is outlined. Subsequently, the mathematical formulations and relevant theoretical solution algorithms, their merits, strengths and shortcomings are highlighted. Last, based on the recent advances in this field, challenges and future research directions are discussed briefly. An attempt is made with the help of this review article to stimulate further research and disseminate the simultaneous design methods to challenging problem areas. In particular, the application of optimization‐based simultaneous design and control methods to large‐scale systems with highly inherent nonlinear dynamics often the case in industrial chemical processes remains a challenging task and yet to be solved. © 2012 American Institute of Chemical Engineers AIChE J, 58: 1640–1659, 2012
Population‐based screening for anemia using first‐time blood donors
Authors: Mast Alan E. , Steele Whitney R. , Johnson Bryce , Wright David J. , Cable Ritchard G. , Carey Patricia , Gottschall Jerome L. , Kiss Joseph E. , Simon Toby L. , Murphy Edward L. ,   for the NHLBI Retrovirus Epidemiology Donor Study‐II (REDS‐II) Investigators
Published: February 2012

AbstractAnemia is an important public health concern. Data from population‐based surveys such as the National Health and Nutrition Examination Survey (NHANES) are the gold standard, but are obtained infrequently and include only small samples from certain minority groups. We assessed whether readily available databases of blood donor hemoglobin values could be used as a surrogate for population hemoglobin values from NHANES. Blood donor venous and fingerstick hemoglobin values were compared to 10,254 NHANES 2005‐2008 venous hemoglobin values using demographically stratified analyses and ANOVA. Fingerstick hemoglobins or hematocrits were converted to venous hemoglobin estimates using regression analysis. Venous hemoglobin values from 1,609 first time donors correlated extremely well with NHANES data across different ages, genders, and demographic groups. Cigarette smoking increased hemoglobin by 0.26–0.59 g/dL depending on the intensity. Converted fingerstick hemoglobin from 36,793 first time donors agreed well with NHANES hemoglobin (weighted mean hemoglobin of 15.53 g/dL for donors and 15.73 g/dL for NHANES) with similar variation in mean hemoglobin by age. However, compared to NHANES, the larger donor data set showed reduced differences in mean hemoglobin between Blacks and other races/ethnicities. Overall, first‐time donor fingerstick hemoglobins approximate US population data and represent a readily available public health resource for ongoing anemia surveillance. Am. J. Hematol. 87:496–502, 2012. © 2012 Wiley Periodicals, Inc.
Seizure‐induced brain‐borne inflammation sustains seizure recurrence and blood–brain barrier damage
Authors: Librizzi Laura , Noè Francesco , Vezzani Annamaria , de Curtis Marco , Ravizza Teresa 
Published: February 2012

AbstractObjective:Epilepsy is a common neurological disorder characterized by recurrent seizures often unresponsive to pharmacological treatment. Brain inflammation is considered a crucial etiopathogenetic mechanism of epilepsy that could be targeted to control seizures. Specific inflammatory mediators overexpressed in human epileptogenic foci are known to promote seizures in animal models. We investigated whether seizures induce brain inflammation independently on extracerebral factors. We also investigated whether brain‐borne inflammation is required and sufficient to maintain seizure activity and whether it causes blood–brain barrier (BBB) impairment. We addressed these questions by studying the relation between seizures, inflammation, and BBB permeability in a brain preparation isolated from extracerebral compartments.Methods:Epileptiform activity was induced by arterial perfusion of bicuculline in the in vitro isolated guinea pig brain. Seizure‐induced brain inflammation was evaluated by quantitative immunohistochemical analysis of interleukin (IL)‐1β in parenchymal cells. BBB damage was assessed by extravasation of intravascular fluorescein isothiocyanate–albumin. The effects of arterially perfused anakinra, a human recombinant IL‐1β receptor antagonist, were investigated on epileptiform discharges, brain inflammation, and BBB damage.Results:Seizure induction in the absence of extracerebral factors promoted the release of IL‐1β from brain resident cells and enhanced its biosynthesis in astrocytes. Anakinra rapidly terminated seizures, prevented their recurrence, and resolved seizure‐associated BBB breakdown.Interpretation:Seizures initiate brain inflammation in glia and promote BBB damage that is independent of either leukocytes or blood‐borne inflammatory molecules. Brain inflammation contributes to the duration and recurrence of seizures. This study supports the use of specific anti‐inflammatory drugs in clinical conditions that present with intractable recurrent seizures. ANN NEUROL 2012;72:82–90
CD36 in the periphery and brain synergizes in stroke injury in hyperlipidemia
Authors: Kim Eunhee , Febbraio Maria , Bao Yi , Tolhurst Aaron T. , Epstein Jeffrey M. , Cho Sunghee 
Published: February 2012

AbstractObjective:Hyperlipidemia exacerbates ischemic stroke outcome and increases CD36 expression in the postischemic brain as well as in peripheral monocytes/macrophages. By exchanging bone marrow‐derived cells between CD36‐expressing and CD36‐deficient mice, this study investigates the contribution of peripheral CD36 in comparison with that of brain CD36 to stroke pathology in hyperlipidemia.Methods:Following bone marrow transplantation, mice were fed a high‐fat diet for 11 weeks and then subjected to ischemic stroke. Stroke outcome, expression of brain CD36, monocyte chemoattractant protein‐1 (MCP‐1), CCR2, and plasma MCP‐1 levels were determined at 3 days postischemia. CD36 and CCR2 expression were also determined in splenocytes incubated with serum obtained from CD36‐expressing or CD36‐deficient mice.Results:Infiltrating immune cells from the periphery are the major source of CD36 in the postischemic brain and contribute to stroke‐induced brain injury. This CD36 effect was dependent on the modulation of MCP‐1 and CCR2 expression in peripheral immune cells as well as CD36‐expressing cells in the host brain.Interpretation:This study demonstrates that CD36 expressed in the periphery and brain synergize in ischemic brain injury through regulation of the MCP‐1/CCR2 chemokine axis in hyperlipidemic conditions. ANN NEUROL 2012;71:753–764
Switching off micturition using deep brain stimulation at midbrain sites
Authors: Green Alexander L. , Stone Ella , Sitsapesan Holly , Turney Benjamin W. , Coote John H. , Aziz Tipu Z. , Hyam Jonny A. , Lovick Thelma A. 
Published: February 2012

AbstractMost of the time the bladder is locked in storage mode, switching to voiding only when it is judged safe and/or socially appropriate to urinate. Here we show, in humans and rodents, that deep brain stimulation in the periaqueductal gray matter can rapidly and reversibly manipulate switching within the micturition control circuitry, to defer voiding and maintain urinary continence, even when the bladder is full. Manipulation of neural continence pathways by deep brain stimulation may offer new avenues for the treatment of urinary incontinence of central origin. Ann Neurol 2012;72:144–147
Eine faszinierende Reise in die Geschichte: Isonitrile als Ausgangsverbindungen für komplexe Amide
Authors: Wilson Rebecca M. , Stockdill Jennifer L. , Wu Xiangyang , Li Xuechen , Vadola Paul A. , Park Peter K. , Wang Ping , Danishefsky Samuel J. 
Published: February 2012

AbstractIn diesem Aufsatz berichten wir über unsere jüngsten Forschungen auf dem Gebiet der Isonitrile, die zur Entwicklung mehrerer breit anwendbarer Kupplungsmethoden zur Bildung von Peptidyl‐ und Glycopeptidyl‐Amidbindungen geführt haben. Weiterhin beschreiben wir die Anwendung dieser Methoden auf die Synthesen komplexer Verbindungen, darunter das cyclische Peptid Cyclosporin A, konformativ gehinderte Peptide und Heterocyclen.
A Fascinating Journey into History: Exploration of the World of Isonitriles En Route to Complex Amides
Authors: Wilson Rebecca M. , Stockdill Jennifer L. , Wu Xiangyang , Li Xuechen , Vadola Paul A. , Park Peter K. , Wang Ping , Danishefsky Samuel J. 
Published: February 2012

AbstractWe describe herein our recent explorations in the field of isonitrile chemistry. An array of broadly useful coupling methodologies has been developed for the formation of peptidyl and glycopeptidyl amide bonds. We further describe the application of these methods to the syntheses of complex systems, including the cyclic peptide cyclosporine A, constrained peptide systems, and heterocycles.
Application of the parallel adaptive genetic simulated annealing algorithm for the synthesis of heat exchanger networks
Authors: Zhao Chao , Xu Qiaoling , An Aimin 
Published: February 2012

ABSTRACTA robust hybrid genetic algorithm that can be used to solve process synthesis problems with mixed integer nonlinear programming (MINLP) models is developed. The proposed hybrid approach constructs an efficient genetic simulated annealing algorithm for global search, whereas the iterative hill climbing method as a local search technique is incorporated into genetic simulated annealing loop to speed up the convergence of the algorithm. To efficiently locate quality solutions to complex nonconvex MINLP problems, a self‐adaptive scheme is developed in the parallel adaptive genetic simulated annealing to maintain a better tradeoff between the global and local search, which can improve the convergence speed and computational efficiency compared with some other hybrid genetic algorithm methods. For the evaluations, we use some well‐known standard benchmark functions. The computational results demonstrate the effectiveness and robustness of the present approach. Further, the proposed algorithm is tailored to find optimum solution to heat exchanger network synthesis problem. The results presented prove that the proposed method is a very efficient global optimization tool for large dimensional, nonconvex MINLP problems. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.
Immobilization of copper(II)‐poly(N‐vinylimidazole) complex on magnetic nanoparticles and its catalysis of oxidative polymerization of 2,6‐dimethylphenol in water
Authors: Wang Huan , Zhang Wenli , Shentu Baoqing , Gu Cheng , Weng Zhixue 
Published: February 2012

AbstractPoly(N‐vinylimidazole) (PVI) was grafted onto magnetic Fe3O4 nanoparticles through siloxane bonds to produce PVI‐grafted Fe3O4 nanoparticles (shortened as Fe3O4‐g‐PVI). The amount of imidazolyl groups in Fe3O4‐g‐PVI was estimated to be 1.16 mmol/g by elemental analysis and thermal gravimetric analysis. The Fe3O4‐g‐PVI coordinated with Cu(II) to form the immobilized Cu(II)‐PVI complex. The stoichiometric ratio between imidazolyl groups in Fe3O4‐g‐PVI and Cu(II) was found to be 4 and the complex formation constant (K) was calculated to be 5.6 × 1014 mol−4 L4. The immobilized Cu(II)‐PVI complex was employed to catalyze the oxidative polymerization of 2,6‐dimethylphenol (DMP) in water and showed excellent CO/CC selectivity to form PPO. After polymerization, the immobilized Cu(II)‐PVI complex catalyst was collected by an external magnetic field and reused in the next run with additional immobilized catalyst and copper ions. After three runs of oxidative polymerization of DMP, the recovery rate of the immobilized Cu(II)‐PVI catalyst was above 95% and the yield of PPO maintained as high as 79.2% with the addition of supplementary catalysts. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012