Porous materials have been a topic of interest in materials chemistry because of their high potential for various applications such as heterogeneous catalysis and gas storage. Beside the common porous materials, such as zeolites or activated carbons, some novel “soft” porous materials, namely organic microporous polymers, have been a focus of recent research, as the covalently bonded organic backbone enables high chemical and thermal stability with wide range specific functionalities while such properties are difficult to combine in inorganic or organic-inorganic hybrid systems. Thus, the introduction of suitable functionality into the porous backbone with high surface area is considered as one of the main targets in the field of porous polymers with the aim to develop properties for specific applications. In this context, organic porous networks based on electron rich building-blocks can extend the applicability of such materials to organic electronics or light driven catalytic systems. The present work focuses on the synthesis of novel porous polymers based on sulphur containing, π-conjugated functional monomers and is divided into two main topics according to the targeted applications: 1. Synthesis of functional polymer networks for organic electronic applications; In this work, investigations related to the introduction of strong electron donors such as tetrathiafulvalene (TTF) and dithienothiophene (DTT) into conjugated microporous polymer (CMP) backbone will be presented. The subsequent formation of corresponding charge-transfer salts after iodine exposure of these electron rich moieties will be discussed. Furthermore, electrochemical polymerisation of DTT monomer will be examined for comparison of the (opto)electronic behaviours in bulk and film in addition to investigations related to the chemical and electrochemical redox properties of those DTT based CMPs. Along with the preparation of novel electron donor systems, this section will also contain discussions related to the mechanism of network formation for Sonogashira Hagihara cross coupling derived CMPs considering the influence of regarding reaction media and monomer ratios for. 2. Synthesis of functional polymer networks for light driven heterogeneous catalysis; In this part the incorporation of a frequently used photoinitiator compound for photopolymerisation process, namely thioxanthone, into different microporous polymer backbones via two different polycondensation reactions will be presented. Applications on heterogeneous sustainable initiation of photopolymerisations of methyl methacrylate and cyclohexene oxide either under artificial light source or sunlight will be introduced.
|School:||Technische Universitaet Berlin (Germany)|
|Source:||DAI-C 81/1(E), Dissertation Abstracts International|
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