Sökning: "aromaticity"

Visar resultat 6 - 10 av 11 avhandlingar innehållade ordet aromaticity.

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

    Författare :Rikard Emanuelsson; Henrik Ottosson; Rik Tykwinski; Uppsala universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  3. 7. Trace analysis of polychlorinated dibenzo-p-dioxines, dibenzofurans and related compounds in environmental matrices

    Författare :Yngve Zebühr; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this thesis sample extraction, clean up procedures and quantitative and qualitative analysis of polychlorinated dibenzo-p-dioxins, dibenzofurans and related compounds are discussed, as well as aspects on the sampling of some complex environmental matrices.The matrices are mostly from the aquatic environment but other samples are also dealt with, such as urban and remote air samples, samples from environments with heavy automobile traffic and samples from one municipal incinerator, waste water treatment plants etc. LÄS MER

  4. 8. Low-coordinate Organosilicon Chemistry : Fundamentals, Excursions Outside the Field, and Potential Applications

    Författare :Muhammad Rouf Alvi; Henrik Ottosson; Joji Ohshita; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; organosilicon; silene; silaaromatics; silenolate; hypersilyl group; alcohol protection; molecular switch; Kemi med inriktning mot organisk kemi; Chemistry with specialization in Organic Chemistry;

    Sammanfattning : This thesis reports on unsaturated silicon compounds, as well as excursions from these into germanium chemistry, single molecule electronics, and silyl protective group chemistry. Both experimental and computational investigations were performed. LÄS MER

  5. 9. Toxicological and Chemical Characterization of Organic Pollutants with Potential to Adversely Affect Fish

    Författare :Henrik Sundberg; Lennart Balk; Dag Broman; Tracy Collier; Stockholms universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Toxicology; Toxikologi;

    Sammanfattning : Several investigations have described adverse effects in fish inhabiting polluted areas, though the causative, or aetiologic compounds have not been substantiated. Since environmental pollutants exist as complex mixtures, reliable risk estimations are difficult to obtain. LÄS MER

  7. 10. Properties of Asphaltenes with emphasis on NMR self-diffusion as the investigating technique

    Författare :Jenny-Ann Östlund; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; amphiphilic; diffusion; oil; mixture analysis; CORE; stability; NMR; pulsed gradient spin echo; light scattering; XPS; asphaltene; chemical interactions;

    Sammanfattning : Asphaltenes are high-molecular weight, highly aromatic molecules that have a strong tendency to aggregate. Asphaltenes are found in oil and may, if they form particles, cause problems during oil production and handling. LÄS MER