Search for dissertations about: "Group 14 Elements"

Showing result 1 - 5 of 27 swedish dissertations containing the words Group 14 Elements.

  1. 1. Organic Heavy Group 14 Element Compounds : A Study of Their Chemical Bonding Properties Directed Towards Applications as Molecular Wires and in Synthesis

    Author : Julius Tibbelin; Henrik Ottosson; Christoph Marschner; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Silicon; Group 14 Elements; Silenes; Conjugation; Chemical Bonding; Electronic Structure; Protecting Group Chemistry; Physical organic chemistry; Fysikalisk organisk kemi; Chemistry with specialization in Organic Chemistry; Kemi med inriktning mot organisk kemi;

    Abstract : The research described herein includes synthesis, spectroscopy, and quantum chemical calculations with focus on the characteristic properties of compounds with bonds between carbon and the heavier Group 14 elements.The chapters based on the first four papers concern σ- and σ/π-conjugated compounds, although the focus of the first paper is on ring strain of bicyclo[1. READ MORE

  2. 2. Hyperconjugation in Group 14 Organic Compounds : Design and Property Investigations

    Author : Aleksandra Denisova; Henrik Ottosson; Thomas Müller; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; 1; 4-disilacyclohexa-2; 5-diene; aromaticity; computational chemistry; conjugation; cross-hyperconjugation; hyperconjugation; group 14 elements; organosilicon chemistry; silole;

    Abstract : Nowadays π-conjugated molecules are widely used as materials for devices in organic and molecular electronics. This is due to the ability of such molecules to conduct electricity. However, π-conjugation leads to molecular rigidness and associated lower solubility, which limits possible applications. READ MORE

  3. 3. Conjugation in Organic Group 14 Element Compounds : Design, Synthesis and Experimental Evaluation

    Author : Rikard Emanuelsson; Henrik Ottosson; Rik Tykwinski; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; conjugation; conductance; electronic structure; Group 14 elements; hyperconjugation; molecular electronics; organosilicon chemistry; Chemistry with specialization in Organic Chemistry; Kemi med inriktning mot organisk kemi;

    Abstract : This thesis focuses on the chemical concept of conjugation, i.e., electron delocalization, and the effect it has on electronic and optical properties of molecules. READ MORE

  4. 4. Heavy-Core Staffanes : A Computational Study of Their Fundamental Properties of Interest for Molecular Electronics

    Author : Niclas Sandström; Henrik Ottosson; Leif Hammarström; Bo Albinsson; Uppsala universitet; []
    Keywords : Organic chemistry; conjugation; polarizability; Group 14 elements; cage compounds; electronic excitations; quantum chemistry; molecular electronics; Organisk kemi;

    Abstract : The basic building blocks in molecular electronics often correspond to conjugated molecules. A compound class consisting of rigid rod-like staffane molecules with the heavier Group 14 elements Si, Ge, Sn and Pb at their bridgehead positions has now been investigated. READ MORE

  5. 5. Industrialised house building : fundamental change or business as usual?

    Author : Carina Unger; Örjan Wikforss; Graham M Winch; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industrialised house building; organisational change; organisational competence; embedded knowledge and action; Industrial engineering and economy; Industriell teknik och ekonomi;

    Abstract : Criticism concerning quality deficiencies and high production costs for housing has made many construction companies make efforts to improve performance, inspired by ideas from the manufacturing industry and in particular the car industry. This is often referred to as industrialised building. READ MORE