ISSN 0959-9428 JMACEP(4) 489-713 (1991) Journal of Materials Chemistry Synthesis, structures, properties and applications of materials, particularly those associated with advanced technology CONTENTS 489 FEATURE ARTICLE. Photoemission in the study of oxide superconductors M. S. Golden, R.G. Egdell and W. R. Flavell 503 Microstructural studies on polypyrrole L. Madsen, B. N.Zaba, M. van der Sluijs, A. E. Underhill and K. Carneiro 507 Semi-crystalline alkali-metal salt complexes with poly(oligooxyethyleneoxy-1,2-phenylene)s J. D. Hague and P. V. Wright 51 1 X-Ray diffraction characterization of iridium dioxide electrocatalysts A. Benedetti, S. Polizzi, P. Riello, A. De Battisti and A. Maldotti 517 Scanning tunnelling microscopy study of osmium-containing electroactive metallopolymer [Os(bipy),(PVP),,C1]Cl films on polycrystalline graphite electrodes N.M.D Brown, H. X. You, R. J. Forster and J. G. Vos 525 Characterization of conducting polymer-quartz composites S. P. Armes, S. Gottesfeld, J. G. Beery, F. Garzon, C. Mombourquette, M. Hawley and H. H. Kuhn 53 1 Copper-cobalt hydroxysalts and oxysalts: Bulk and surface characterization P. Porta, R. Dragone, G. Fierro, M. Inversi, M. Lo Jacono and G. Moretti 539 Magnesium oxide as a support material for dehydrogenation catalysts D.E. Stobbe, F.R. van Buren, P. E. Groenendijk, A. J. van Dillen and J. W. Geus 545 Phase relations in the system BiO,,,-SrO-CuO at 1123 K K. T. Jacob and T. Mathews 551 Low-temperature vapour deposition of high-purity iridium coatings from cyclooctadiene complexes of iridium.Synthesis of a novel liquid iridium chemical vapour deposition precursor J. B. Hoke, E. W. Stem and H. H. Murray 555 Synthesis and crystal structures of the layered I-111-V Zintl phases, K,In,X,, where X=As, Sb T. L. T. Birdwhistell, C. L. Klein, T. Jeffries, E. D. Stevens and C. J. O’Connor 559 Preparation of novel intercalation compounds of silver and copper in layered perovskites, ALaNb,O, T. Matsuda, T. Fujita and M. Kojima 563 Nuclear magnetic resonance spectroscopy investigation of thermal transformation sequences of alumina hydrates. Part 1.-Gibbsite, y-Al(OH), R. C. T. Slade, J. C. Southern and I. M. Thompson 569 Reinvestigation of the nickel phosphine catalysed electrochemical synthesis of poly(2,5-pyridine). X-Ray crystal structures of [Ni,Br,(p-5-BrC,H,N-CZ, N), (PPh,),] and [PtBr(5-BrC,H,N-CZ) (PPh,),] N.W.Alcock, P. N.Bartlett, V. M. Eastwick-Field, G. A. Pike and P. G. Pringle 577 Zirconium compounds as coatings on polystyrene latex and as hollow spheres N.Kawahashi, C. Persson and E. Matijevik 583 Second-harmonic generation properties of some co-ordination compounds based on pentanedionato ligands R. C. B. Copley, C. Lamberth, J. Machell, D. M. P. Mingos, D. M. Murphy and H. Powell 591 Second-harmonic generation from mixed crystals of p-nitroaniline with substituted benzenes studied by the powder method R.Matsushima, H. Takeshita and N.Okamoto 595 Synthesis and properties of a new family of phases, Li,XYO,: X =Al, Ga; Y =Si, Ge C.K. Lee and A. R. West 597 La, -,Sr,CuO, -d: Structural, magnetic and transport measurements on antiferromagnets, insulators and superconductors M. J. Rosseinsky, K. Prassides and P. Day 61 1 Molecular engineering of liquid-crystalline polymers by living polymerization. Part 13.-Synthesis and living cationic polymerization of (S)-(-)-2-methylbutyl 4-(w-vinyloxy)alkoxybiphenyl-4-carboxylatewith undecanyl and hexyl alkyl groups V. Percec, Q. Zheng and M. Lee 621 Sol-gel synthesis of WO, thin films P. Judeinstein and J. Livage 629 Effect of composition of polymer backbone on spectroscopic and electrochemical properties of ruthenium(I1) bis(2,2’-bipyridyl)-containing 4-vinylpyridine/styrene copolymers D. Leech, R.J. Forster, M. R.Smyth and J.G. Vos 63 7 Transformation of schoepite into uranyl oxide hydrates of the bivalent cations Mgz+, Mn2+ and Ni2+ R. Vochten, L. Van Haverbeke and R.Sobry 643 Synthesis, characterization and biodegradation test of nylon 2/6 and nylon 2/6/6 K. E. Gonsalves, X.Chen and T. K. Wong 649 The Bi,O,-Sm,O, system: Phase diagram and electrical properties P. Conflant, C. Follet-Houttemane and M. Drache 655 Aromatic ether-ketone-'X polymers. Part 2.-EK-Imide copolymers. C. J. Borrill and R. H. Whiteley 663 Use of phenylarsine in the atmospheric pressure metal organic chemical vapour deposition of GaAs on Si(100) N. R. Dennington, A. C. Wright and J. 0. Williams 667 Crystal structures of chiral smectogenic 4-octylbiphenyl-4-y1 p-[(S)-1-methylheptyloxy]benzoate and poctylpheny14-[(S)- I-methylheptyl- oxy]biphenyl-4-carboxylate K.Hori and Y. Ohashi sh 673 Variation with composition of the intrinsic sensitivity of halogen-substituted styrene copolymers to electron-beam radiation P.C. Miller Tate and R. G. Jones 677 Synthesis, structure and electrical properties of Sr,CuO,(CO,), an oxide carbonate related to perovskite T. G. N. Babu, D. J. Fish and C. Greaves 681 Sol-gel synthesis of Zr(HPO&.H,O H. Benhamza, P. Barboux, A. Bouhaouss, F-A. Josien and J. Livage 685 Reorientational motions of hydrogenic species in 1Ztungstophosphoric acid 14-hydrate: A neutron scattering study R. C. T. Slade, G. P. Hall, H. A. Pressman and I. M. Thompson 691 Synthesis and characterisation of [( q-C,Me,)Ru(p,q-C,Me,)Ru(q-C5Me5)]+[A]-;[A]-=TCNE, TCNQ, C3[C(CN)z]3.Crystal structure of the one-dimensional salt [( q-C,Me,)Ru(p,q-C,Me,)Ru( q-C,Me,)] '[TCNE] -D. O'Hare, J. Brookes and D. J. Watkin MATERIALS CHEMISTRY COMMUNICATIONS 699 Electrochemical probing of the sol-gel-xerogel evolution P. Audebert, P. Griesmar and C. Sanchez 701 Low-temperature vapour deposition of high-purity copper coatings from bis[N-(fluoroalkyl)salicylaldiminato]copper chelates J. B. Hoke and E. W. Stern 703 Liquid-crystalline zinc and nickel I ,4,8,11,15, I8,22,25-octaalkylphthalocyaninates:Beneficial effect of the zinc ion on mesophase stabilities M. J. Cook, S. J. Cracknell and K. J. Harrison 705 Chemical intercalation of magnesium into solid hosts P. G. Bruce, F. Krok, J. Nowinski, V. C. Gibson and K. Tavakkoli 707 Correlation between absolute configuration of benzylic chiral centre and sign of spontaneous polarization of chiral dopants for ferroelectric liquid crystals T. Kusumoto, A. Nakayama, K-i. Sato, T. Hiyama, S. Takehara, M. Osawa and K. Nakamura 709 Book Reviews: J. A. Hunter; K. C. Waugh; H. Block; J. Klinowski 7 I3 Corrigendum Note: Where an asterisk appears against the name of one or more authors, it is included with the authors' approval to indicate that correspondence may be addressed to this person.