The aim of the study is to develop nanocomposite-based elastomers of a thin layer thickness that nonetheless provide ultrahigh permeation resistance to liquids and gases. The platelet fillers used phyllosilicate or graphene exhibit a high efficiency. The nanocomposites were prepared by means of continuous latex mixing or alternatively by melt mixing using an internal mixer. A secondary latex of butyl rubber (solution polymer) was prepared for the latex mixing procedure [1]. Phyllosilicate butyl rubber nanocomposites prepared by means of latex mixing are shown to be of major advantage in terms of the diffusion-coefficients visa-vis toluene, for example, and to have good physical properties.

Rudolf Hoppe, emeritus professor at the University of Gießen, passed away on November 24, 2014, just a few weeks after his 92nd birthday. With his passing, the inorganic solid-state chemistry community has lost one of its most famous personalities, whose works, interests, and talents stretched far over the boundaries of his own field. Hoppe was born on October 29, 1922 in Wittenberge, Mark Brandenburg, where he successfully completed his high school education in 1941. He was immediately conscripted and could only start studying for his chemistry degree at the University of Kiel in 1945, after he returned from captivity as a prisoner of war. A decisive factor for his career was an encounter with Wilhelm Klemm, who had just taken the Chair of Inorganic Chemistry at Kiel, and subsequently supervised Hoppe’s diploma thesis. Hoppe self-confidently came up with his own research topic, the bold idea of synthesizing “real” noble-gas compounds, namely xenon fluorides. Here one recognizes as one of Hoppe’s scientific maxims to need to question paradigms, even when they appear irrefutable, and to accept no intellectual barriers but rather to check their stability, and, when necessary, pull them down. To start with, however, his mentor, who he always admired, suggested a project that was a bit more down-to-earth: the preparation of complex silver and gold fluorides. After completing his diploma thesis in 1951, he followed Wilhelm Klemm to the University of Münster. In the same year, he married Karin Saborowski, and their sons Jens Reimar and Klaus-Dieter followed in due course. He completed his doctorate in 1954, and completed his hablilitation in inorganic chemistry four years later. Hoppe’s scientific achievements soon brought him attention, and he was offered several attractive positions over a short time. In 1962, he joined the faculty in Münster, and in 1964, he took up a newly created position as Professor of Inorganic Chemistry. From subsequent offers in Düsseldorf, Bochum, and Gießen, he took the Chair of Inorganic and Analytical Chemistry at the University of Gießen in 1965, and remained loyal to this institution until his retirement, despite offers from the Universities of Hannover and Stuttgart. Hoppe’s scientific work is closely connected to modern solid-state chemistry, the knowledge of which is an important requirement for all the developments that are taken for granted today, not least in the area of high technology. His early work already outlined a wide-reaching and ingeniously realized research program. He was passionate about preparative solid-state chemistry, and reported hundreds of new oxides and fluorides. Practically no elements in the periodic table were left unexplored by his systematic studies. His work contains many highlights that in the meantime have made their way into standard textbooks. For example, his research group succeeded in realizing uncommon valence states, some of which were not thought to be possible, including transition metals in uncommonly high oxidation states such as tetravalent copper (Cs2CuF6), cobalt (K2CoO3), and nickel (K2NiF6), as well as novel low-valent states, such as monovalent iron, cobalt, and nickel (e.g., K3FeO2). In 1962, Hoppe revisited his ideas on the synthesis of noble-gas compounds. Convinced by his own estimation that xenon fluorides should be thermodynamically stable, Hoppe succeeded in reacting xenon and fluorine in a spectacularly simple fashion. Independently and almost simultaneously, two American research groups also prepared xenon compounds, however special credit should be given to Hoppe as it is exclusively his early deliberation and reasoning that allowed the then dogmatic and strictly valid limits of valence theory to be overcome. A particular feature of Hoppe’s research style was that the experimental results were accompanied and supported from the outset by conceptual approaches that targeted structuring, classification, and a detailed understanding of the experimental findings. Hoppe’s impressive and sometimes spectacular results were quite rightly highly recognized, and his scientific career was accompanied by numerous prestigious honors, including the Alfred Stock Memorial Prize from the Gesellschaft Deutscher Chemiker (GDCh; German Chemical Society), the prestigious Otto Hahn Prize for Chemistry and Physics, and the Lavoisier Medal from the Société Chimique de France. Hoppe was not only an unusually creative and successful researcher, he was also an inspiring and gifted teacher. His students could count themselves lucky that they were swept along with his enthusiasm for chemistry, experiencing all its beauty and depth under his guidance. Rudolf Hoppe will never be forgotten by all who adored him as an academic teacher or were connected to him on a personal level.

Zeitschrift für anorganische und allgemeine ChemieVolume 640, Issue 1 p. 3-4 EditorialFree Access ZAAC – Welcoming 2014 Martin Jansen, Martin JansenSearch for more papers by this authorThomas M. Klapötke, Thomas M. KlapötkeSearch for more papers by this authorChristian Limberg, Christian LimbergSearch for more papers by this authorSabrina Turba, Sabrina TurbaSearch for more papers by this author Martin Jansen, Martin JansenSearch for more papers by this authorThomas M. Klapötke, Thomas M. KlapötkeSearch for more papers by this authorChristian Limberg, Christian LimbergSearch for more papers by this authorSabrina Turba, Sabrina TurbaSearch for more papers by this author First published: 07 January 2014 https://doi.org/10.1002/zaac.201410001AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume640, Issue1January 2014Pages 3-4 RelatedInformation

Zeitschrift für anorganische und allgemeine ChemieVolume 639, Issue 15 p. 2671-2672 Laudatio Dedicated to Professor Wolfgang Bensch on the Occasion of His 60th Birthday Martin Jansen, Martin JansenSearch for more papers by this authorThomas M. Klapötke, Thomas M. KlapötkeSearch for more papers by this authorChristian Limberg, Christian LimbergSearch for more papers by this author Martin Jansen, Martin JansenSearch for more papers by this authorThomas M. Klapötke, Thomas M. KlapötkeSearch for more papers by this authorChristian Limberg, Christian LimbergSearch for more papers by this author First published: 04 December 2013 https://doi.org/10.1002/zaac.201310005AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume639, Issue15Special Issue: Contributions dedicated to Professor Wolfgang Bensch on the Occasion of His 60th BirthdayDecember 2013Pages 2671-2672 RelatedInformation

Zeitschrift für anorganische und allgemeine ChemieVolume 639, Issue 1 p. 3-4 EditorialFree Access ZAAC – Conciliating Tradition and Modernity Martin Jansen, Martin JansenSearch for more papers by this authorThomas M. Klapötke, Thomas M. KlapötkeSearch for more papers by this authorChristian Limberg, Christian LimbergSearch for more papers by this authorSabrina Turba, Sabrina TurbaSearch for more papers by this author Martin Jansen, Martin JansenSearch for more papers by this authorThomas M. Klapötke, Thomas M. KlapötkeSearch for more papers by this authorChristian Limberg, Christian LimbergSearch for more papers by this authorSabrina Turba, Sabrina TurbaSearch for more papers by this author First published: 14 January 2013 https://doi.org/10.1002/zaac.201210019Citations: 1AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat No abstract is available for this article.Citing Literature Volume639, Issue1January 2013Pages 3-4 RelatedInformation

The crystal structure of commensurately modulated Pr2SbO2 was solved in the orthorhombic superspace group Immm(0β0)000, q = 3/4b*, a = 13.5790 (15), b = 3.9818 (18), c = 4.0041 (18) Å (T = 40 K) from a crystal twinned by reticular pseudomerohedry applying the twin law (1 0 0, 0 0 1, 0 -1 0), corresponding to a rotation by 90° along the reciprocal a axis. The formation of Zintl-type Sb(2-)-Sb(2-) dumbbells in Pr2(3+)Sb(2-)O2(2-) is considered to be accountable for its semiconducting properties, as observed previously. The space group for the three-dimensional commensurate supercell a = 13.5790 (15), b = 15.9272 (18), c = 4.0041 (18) Å (T = 40 K) is Pmnm.

The magnetic ordering patterns of Rb${}_{11}$Mn${}_{8}$O${}_{16}$ and Cs${}_{3}$Mn${}_{2}$O${}_{4}$ were determined by neutron powder diffraction with and without applied magnetic fields. The crystal structures of these compounds exhibit infinite chains of edge-sharing MnO${}_{4}$ tetrahedra with periodically alternating Mn${}^{2+}$ and Mn${}^{3+}$ valence. Both Rb${}_{11}$Mn${}_{8}$O${}_{16}$ and Cs${}_{3}$Mn${}_{2}$O${}_{4}$ show collinear magnetic order with antiferromagnetic alignment of Mn moments along the chains below the N\'eel temperatures ${T}_{\mathrm{N}}$ $=$ 38(1) and 13.5(5) K, respectively. In Cs${}_{3}$Mn${}_{2}$O${}_{4}$ the Mn${}^{2+}$ and Mn${}^{3+}$ moments could be separately refined. The full magnetic structure in a zero magnetic field can be viewed as a set of ferrimagnetic chains whose net moments are coupled antiferromagnetically perpendicular to the chain direction. For this compound, we further observe a magnetic field induced transition into a high-field phase with uniformly aligned ferrimagnetic moments.

Zeitschrift für anorganische und allgemeine ChemieVolume 638, Issue 1 p. 3-4 EditorialFree Access ZAAC – 120 Years and still going strong Prof. Dr. Dr. h.c. Martin Jansen, Prof. Dr. Dr. h.c. Martin JansenSearch for more papers by this authorProf. Dr. Thomas M. Klapötke, Prof. Dr. Thomas M. KlapötkeSearch for more papers by this authorProf. Dr. Christian Limberg, Prof. Dr. Christian LimbergSearch for more papers by this authorDr. Sabrina Turba, Dr. Sabrina TurbaSearch for more papers by this author Prof. Dr. Dr. h.c. Martin Jansen, Prof. Dr. Dr. h.c. Martin JansenSearch for more papers by this authorProf. Dr. Thomas M. Klapötke, Prof. Dr. Thomas M. KlapötkeSearch for more papers by this authorProf. Dr. Christian Limberg, Prof. Dr. Christian LimbergSearch for more papers by this authorDr. Sabrina Turba, Dr. Sabrina TurbaSearch for more papers by this author First published: 24 January 2012 https://doi.org/10.1002/zaac.201290002AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume638, Issue1January 2012Pages 3-4 RelatedInformation

Hans Georg von Schnering, who died on July 22nd, 2010 at the age of 79 after a short but severe illness, was among the leading solid state and structural chemists of the twentieth century. As a sign of gratitude and recognition we dedicate this special issue of Zeitschrift für Anorganische und Allgemeine Chemie to him in commemoration of his trail blazing contributions to the body of modern solid state sciences. Hans Georg von Schnering was born on July 6th, 1931 in Ranis/Thuringia. Due to the Second World War and the post-war confusion, his family spent a restless time at several places in Thuringia and Brandenburg until they managed to settle in Münster/Westfalia, where Hans Georg von Schnering stayed for the following three decades. After his Abitur in 1951, he studied chemistry at Münster and received his PhD with a thesis under the supervision of Rudolf Hoppe in 1960. The years at the Münster University, in particular the guidance of Wilhelm Klemm, were definitely formative for him and his attitude towards solid state chemistry. During the 1950's through to the 1970's, Münster evolved to be a unique center for inorganic chemistry hosting outstanding experienced as well as younger scientists. Hans Georg von Schnering's contributions to this success story were inspiring and definitely substantial. Hans Georg von Schnering's stay, already as PhD student, with the crystallographer Josef Zemann at Göttingen, may be regarded crucial, paving the way for a steep scientific career. In Göttingen he received an excellent introduction to modern single crystal Xray crystallography, and he belonged to the small group of pioneers who introduced single crystal structure analysis as a routine tool into solid state chemistry. While successfully employing the new methodology for solving complex structural problems from virtually all fields of chemistry, his enthusiasm for chemistry coupled with high intellectual capabilities soon attracted the attention of the community, and he received distinguished offers, first from the Münster University, later from Karlsruhe and Frankfurt. At first, he stayed in Münster and declined the latter calls; however, in 1975 he accepted the position of a Director at the Max Planck Institute for Solid State Research in Stuttgart. Von Schnering's impressive scientific achievements cover a broad area, comprising transition metal cluster chemistry, intermetallics, polyphosphides, and molecular solids. In addition to these experimentally explorative works, he has developed conceptual approaches in the fields of topology and chemical bonding. The titles of his most influential publications, e.g. “Neue Untersuchungen über die Chloride des Molybdäns” (1967), “Homoatomic Bonding of Main Group Elements” (1981), “Bridging Chasms with Polyphosphides” (1988), “How Chemistry Adapts Chemical Structures to Curvature” (1987), or “A New Look at Electron Localization” (1991), may serve as a road map to follow Hans Georg von Schnering's scientific track. In collaboration with Harald Schäfer he laid the foundation for transition metal cluster chemistry, starting with Mo6 clusters encountered in reduced molybdenum halides. A major share of his effort and capacity was devoted to exploring polyphosphides and -arsenides, which constitute subclasses of Zintl phases. Just to give a flavor of the exciting results achieved, one might mention the discovery of the “Ufosane” P113−, “aromatic” P64−, P15− and P14S as cutouts from “Hittorf'scher Phosphor”, or As88−, an analogue of S8. Von Schnering being among the first in routinely utilizing single crystal X-ray crystallography in explorative solid state chemistry, it is not surprising that topology always attracted his attention. Together with his close friend Sten Andersson he developed universally applicable tools for describing crystal structures. Periodic Nodal Surfaces were developed as a tool to understand and classify inorganic solids, and to eventually derive structure/property relations. As a special gift, he has always been able to make the esthetics behind chemical structures visible. During the last period of his active career, Hans Georg von Schnering put his main emphasis on understanding the bonding properties in solids. He saw the key to this challenge in relating the electronic structure in momentum space to the electron density distribution in real space. Results of lasting importance worth being emphasized are the Electron Localization Function, a tool of general applicability, and his finding that valence electrons in intermetallics are far more localized than is commonly believed. Hans Georg von Schnering's oeuvre that comprises about 1000 publications received high recognition, such as the prestigious Alfred-Stock-Gedächtnispreis of the German Chemical Society. He was a member of the Deutsche Akademie der Naturforscher Leopoldina and doctor honoris causa of the universities of Geneva, Würzburg, and Karlsruhe. Hans Georg von Schnering was a highly esteemed colleague whose advice has been sought by many scientists. As a long term member of the International Advisory Board, he gave strong support to Zeitschrift für Anorganische und Allgemeine Chemie, both by publishing many of his outstanding results in this journal, and by providing valuable advice to the Editors. Hans Georg von Schnering was uncompromising not only in all issues related to science. Behind his outward often “rough and ready” attitude there was a warm and supportive character. We have lost a grand master of chemistry, a dear colleague, a good friend and an inspiring and admirable teacher. Hans Georg von Schnering leaves behind his wife Christa, three daughters and six grandchildren. Prof. Dr. Dr. h.c. Martin Jansen Editor, ZAAC

Pb2MnO4 and Sr-doped Pb2MnO (4) powders have been synthesized along the Pechini process. Partial substitution of Pb2+ by Sr2+ has been effective up to 2 at.%. Beyond this value, secondary phases appeared among others PbO or SrMnO3. The effect of high pressures (< 6 GPa) and high temperatures (< 900 degrees C) on Pb2MnO4, containing Pb2+ cations with electron lone pairs, has been studied. In spite of the lone pairs present, this semiconductor (Eg = 1.5 eV) did not exhibit any phase transition under pressure. Instead, decomposition into three phases (Pb3Mn7O15, PbO and Pb3O4) has been observed with reduction of Mn4+ to Mn3+ and concomitant to oxidation of Pb2+ to Pb4+. Strontium doping, bearing no electron lone pair, turned out, however, to lead to the same decomposition, the one difference being a higher decomposition temperature. Electronic and thermal properties of pure and doped Pb2MnO4 were also investigated. (c) 2010 Elsevier Masson SAS. All rights reserved.

Zeitschrift für anorganische und allgemeine ChemieVolume 636, Issue 1 p. 3-4 Editorial ZAAC – Entering the Next Decade Martin Jansen, Martin JansenSearch for more papers by this authorThomas M. Klapötke, Thomas M. KlapötkeSearch for more papers by this authorChristian Limberg, Christian LimbergSearch for more papers by this author Martin Jansen, Martin JansenSearch for more papers by this authorThomas M. Klapötke, Thomas M. KlapötkeSearch for more papers by this authorChristian Limberg, Christian LimbergSearch for more papers by this author First published: 22 December 2009 https://doi.org/10.1002/zaac.200990035Citations: 1AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article.Citing Literature Volume636, Issue1Special Issue: Dedicated to Professor Arndt Simon on the Occasion of His 70th BirthdayJanuary 2010Pages 3-4 RelatedInformation