Oksida bertipe perovskit dengan rumus umum umumnya ditulis sebagai ABO₃, di mana posisi A ditempati oleh kation logam tanah jarang, logam alkali tanah atau kation besar lainnya, sedangkan posisi B diisi oleh kation logam transisi dengan jari-jari ion yang lebih kecil. Bahan ini telah menarik perhatian luas dalam bidang katalisis karena struktur kristalnya yang fleksibel, kemampuan substitusi …
Masa depan logam mulia berkilau dan tahan. Meskipun mahal dan berpotensi tergantikan oleh katalis logam transisi, penerapan logam mulia dalam penelitian dan industri menunjukkan potensi. Logam-logam ini mengkatalisis oksidasi dan hidrogenasi karena perilaku disosiatifnya terhadap hidrogen dan oksigen, dehidrogenasi, isomerisasi, dan aromatisasi, dll. Katalis logam mulia, terutama katalis berbas…
The broad interdisciplinary nature of biocatalysis fosters innovation, as different technical fields are interconnected and synergized. A way to depict that innovation is by conducting a survey on patent activities. This paper analyses the intellectual property activities of the last five years (2014–2019) with a specific focus on biocatalysis applied to asymmetric synthesis
: Chondroitin sulfates are linear anionic sulfated polysaccharides found in biological tissues, mainly within the extracellular matrix, which are degraded and altered by specific lyases depending on specific time points. These polysaccharides have recently acquired relevance in the pharmaceutical industry due to their interesting therapeutic applications
Dalam salah satu bidang generik kimia terbesar (terutama oksidasi), ada banyak sekali proses yang dioperasikan oleh hampir semua jenis perusahaan manufaktur kimia, menghasilkan produk dengan nilai yang tak terhitung, namun menghasilkan volume limbah yang hampir tak terukur. Oleh karena itu, dari sudut pandang kimia hijau, pencarian sistem katalitik yang efisien dan heterogen yang mengeksploitas…
In his Master project Sven Herrmann for the first time carried out fundamental investigations into the development of polyoxometalate based ionic liquids (POM-ILs). The POM-ILs were obtained by charge balancing inorganic polyoxometalate (POM) anions with sterically demanding tetraalkylammonium or tetraalkylphosphonium cations. By functionalization of lacunary Keggin clusters with 3d-transition …
This thesis addresses two fundamental areas in contemporary organic chemistry: synthesis of natural products and catalytic asymmetric synthesis. Firstly, a new methodology, developed by our research group, which allows the asymmetric synthesis of lactones, a structural unit ubiquitous in natural products, was utilised in the synthesis of a number of natural product analogues that showed signifi…
Today, the development of active and stable catalysts still represents a challenge to be overcome in the research field of low-temperature fuel cells. Operation at low temperatures offers great advantages, such as quick start-up and longer stability, but demands the utilization of highly active catalysts to reduce the activation energy of the electrochemical reactions involved in the electrod…
Karl Striegler investigates novel materials for photocatalytic hydrogen evolution from water. Graphitic Carbon Nitrides are an interesting class of materials with a structure close to graphite. For overcoming certain limitations, the author used different approaches to functionalize the basic material. He deposited nanoparticles to enhance the catalytic activity and used copolymerization as wel…
This book presents current research into the catalytic combustion of methane using perovskite-type oxides (ABO3). Catalytic combustion has been developed as a method of promoting efficient combustion with minimum pollutant formation as compared to conventional catalytic combustion. Recent theoretical and experimental studies have recommended that noble metals supported on (ABO3) with well-order…