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Springer awards „BestMasters“ to the best master’s theses which have been completed at renowned universities in Germany, Austria, and Switzerland. The studies received highest marks and were recommended for publication by supervisors. They address current issues from various fields of research in natural sciences, psychology, technology, and economics. The series addresses practitioners as well as scientists and, in particular, offers guidance for early stage researchers.

Sven Herrmann

New Synthetic Routes to Polyoxometalate Containing Ionic Liquids An Investigation of their Properties Foreword by Prof. Dr. Carsten Streb

Sven Herrmann Ulm, Germany

BestMasters ISBN 978-3-658-08795-1 ISBN 978-3-658-08796-8 (eBook) DOI 10.1007/978-3-658-08796-8 Library of Congress Control Number: 2015930457 Springer Spektrum © Springer Fachmedien Wiesbaden 2015 This work is subject to copyright. All rights are reserved by the Publisher, whether the whole or part of the material is concerned, speci¿cally the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on micro¿lms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed. The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a speci¿c statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. The publisher, the authors and the editors are safe to assume that the advice and information in this book are believed to be true and accurate at the date of publication. Neither the publisher nor the authors or the editors give a warranty, express or implied, with respect to the material contained herein or for any errors or omissions that may have been made. Printed on acid-free paper Springer Spektrum is a brand of Springer Fachmedien Wiesbaden Springer Fachmedien Wiesbaden is part of Springer Science+Business Media (www.springer.com)

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Foreword In his Master project, Sven Herrmann carried out fundamental investigations into the development of polyoxometalate based ionic liquids (POM-ILs). For the first time he conducted a systematical study of POM-IL synthesis and properties, laying the foundations for a completely new field between inorganic supramolecular chemistry and nanomaterials chemistry. POM-ILs are obtained by charge balancing inorganic polyoxometalates (POM) anions with sterically demanding tetraalkylammonium or tetraalkylphosphonium cations. By functionalization of lacunary Keggin clusters with 3dtransition metals and charge balancing with tetraalkylammonium cations of varying chain length, a model system for the correlation of molecular structure with macroscopic materials properties such as viscosity and melting point was achieved. In this thesis, Sven Herrmann presents a systematic report on the syntheses via selfaggregat