Search for dissertations about: "π-conjugation"

Found 5 swedish dissertations containing the word π-conjugation.

  2. 1. Low-Coordinate Organopnictogens : Synthesis and Optoelectronic properties

    Author : Muhammad Anwar Shameem; Andreas Orthaber; Roland Christian Fischer; Uppsala universitet; []
    Keywords : Pnictogen; phosphorus; arsenic; phosphaalkenes; arsaalkenes; phospholes; arsoles; alkynes; π-conjugation; PAHs; Fullerene-C60; sumanene; truxene; organic electronics;

    Abstract : This thesis work is based on the development of novel organopnictogen compounds and the exploration of their potential applications in organic electronics. In particular, incorporation of phosphorus and arsenic into π-conjugated systems is known to modify the optoelectronic properties. READ MORE

  4. 2. Phosphorus Centers in π-conjugated Systems

    Author : Elisabet Öberg; Sascha Ott; Koop Lammertsma; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; phosphorus; phosphaalkene; phosphole; alkyne; π-conjugation; molecular electronics; Kemi; Chemistry;

    Abstract : Single-molecular electronics and organic material electronics are expanding research fields that ultimately aim for a vast variety of different applications, ranging from organic light-emitting diodes, to novel ways to improve the performance and decrease the size of electronics components. To achieve these goals, research has to be focused both on the development of functional molecules, but also on device fabrication. READ MORE

  5. 3. Functional and Modular As=C and P=C Group Motifs

    Author : Daniel Morales Salazar; Andreas Orthaber; Jose Goicoechea; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; materials; physical chemistry; arsaalkenes; phosphaalkenes; DBU; fluorene; photochemistry; arsenic; phosphorus; carbon; hydrogen; sulfur; gold; copper; organic materials; organic electronics; molecular electronics; polymers; transition metal complexes; molecular materials; small molecule; hydrogen bonding; electrochemistry; cyclic voltammetry; chronoamperometry; electropolymerization; artificial intelligence; potentiodynamic; modularity; functionality; XPS; DFT; π-conjugation effects; 2D-NMR; disilenes; siliconoids; group motifs; functional group; emergence; reactivity; reactive systems; organometallic complexes; π-delocalization; low-coordinate; main group chemistry; heavy p-block elements; pnictogens; copper I complex; gold I complex; photosensitizer; XRD; spectroelectrochemistry; electrochromism; smart materials; synthesis; phosphaalkene ligands; imine ligands; hysteresis-like criteria; representative settings; optimal criteria; transient covalence; interactive image; conformer; isomer; ligand scrambling; nanomaterials; stimuli-responsive; optical properties; ligand design; molecular design; X-ray crystallography; emission; self-assembly; As=C; Si=Si; P=C; multiple bond; equilibrium; heteroalkenes; alkenes; reversibility; Raman; ATR-FTIR; ERDA; Kemi; Chemistry;

    Abstract : This work focuses on the design, synthesis, characterization, and application projections of low-coordinated heavy pnictogen-containing (described by the generic letter E, hence E=C) phosphaalkenes (P=C) and arsaalkenes (As=C), with emphasis on the E=C group motifs. The work aims to understand their functional and modular character, reactivity, and potential applications by stabilizing, isolating, and characterizing these species in low-coordination environments. READ MORE

  6. 4. 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

  7. 5. Towards flexible organic electronics : photoelectron spectroscopy of surfaces and interfaces

    Author : Stina Jönsson; Ian D. Parker; Linköpings universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Intensive studies of conjugated molecules and polymers are carried out all over the world with the intent of obtaining cheap and efficient organic electronic devices. The most mature application at the moment is the light-emitting diode, but also photovoltaic cells and different types of transistors shows promising results. READ MORE