Essays about: "alkyl groups"

Showing result 1 - 5 of 7 essays containing the words alkyl groups.

  1. 1. Methods and Potentials of Kraft Lignin Esterification

    University essay from KTH/Fiber- och polymerteknologi

    Author : Taoran Xu; [2023]
    Keywords : Kraft lignin; acetylation; fatty acid esterification; quantitative 31P NMR; lignin nanoparticles; Kraftlignin; acetylering; fettsyreesterifiering; kvantitativ 31P NMR; lignin nanopartiklar;

    Abstract : Lignin, en av huvudkomponenterna i lignocellulosabiomassa, utgör en stor mängd av sidoströmen från massaindustrin. Lignin är aromatiska makromolekyler som förekommer i rikliga mängder i naturen och uppvisar unika antioxidant-, uv-skyddande, anti-ultravioletta, antikorrosiva och antimikrobiella egenskaper, etc. READ MORE

  3. 2. Charge transfer states at polymer solar cell interfaces : Insights from atomic-scale modeling

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Rickard Svensson; [2022]
    Keywords : organic solar cells; OSC; polymer; interface; charge transfer; non-fullerene acceptor; PYT; PBDB-T; DFT; TD-DFT; conformation; alkyl groups; methylation; HOMO; LUMO; FMO; NTO; UV-Vis; DOS; exciton; exciton binding energy; dipole moment; open-circuit voltage; organiska solceller; OSC; polymer; gränssnitt; laddningsöverföring; icke-fullerenacceptor; PYT; PBDB-T; DFT; TD-DFT; konformation; alkylgrupper; metylering; HOMO; LUMO; FMO; NTO; UV-Vis; DOS; exciton; excitonbindningsenergi; dipolmoment; tomgångsspänning;

    Abstract : Organic solar cells (OSCs) based on non-fullerene acceptors (NFAs) have attracted a great deal of attention in recent years due to their rapidly increasing efficiency and enormous potential. In this work, the optical and electronic properties of systems containing the very promising non-fullerene acceptor PYT have been thoroughly studied with the use of the density functional theory (DFT) and the time-dependent density functional theory (TDDFT). READ MORE

  4. 3. Suzuki reactions in novel liquids

    University essay from Linnéuniversitetet/Institutionen för kemi och biomedicin (KOB)

    Author : Nazanin Hassanzadeh; [2021]
    Keywords : Suzuki coupling reaction; ni-DES; HPLC; TLC;

    Abstract : Non-ionic deep eutectic solvent (ni-DES) possesses various advantages such as good solvation, biodegradability, and non-toxicity which makes it a perfect and environmentally friendly solvent for organic synthesis. A Pd (OAc)2 catalyzed, Suzuki reaction of aryl bromide and N-heteroaryl halide with arylboronic acid in green and novel solvent (ni-DES) is described. READ MORE

  5. 4. Charging behaviour of the amine moiety at the air-water interface. A vibrational sum frequency study

    University essay from KTH/Yt- och korrosionsvetenskap

    Author : Mikael Gullstrand; [2021]
    Keywords : Langmuir monolayers; Vibrational Sum Frequency Spectroscopy; Fatty amine; Monovalent ions; Poisson Boltzmann theory; Langmuirmonolager; Vibrationssumfrekvensspektroskopi; Fettkedjeamin; Monovalenta joner; Poisson-Boltzmann-teori;

    Abstract : Laddningsbeteendet hos amingruppen vid ytgränsskiktet mellan vatten och luft har studerats under ändring av vattenfasens pH och NaCl-koncentration via den ickelinjära laserspektroskopiska tekniken, vibrationssumfrekvensspektroskopi (VSFS). Modellen som användes för ytan bestod av ett Langmuirmonolager av 1-docosanamin, en icke-löslig fettkedjeamin med NH2-gruppen riktad mot vattenfasen. READ MORE

  6. 5. CHARACTERIZATION OF EARLY LIFE EXPOSURE TO ENVIRONMENTAL CHEMICALS AND ITS IMPACTS ON HEALTH

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Lisanna Sinisalu; [2020]
    Keywords : ;

    Abstract : The exposome is a complex study that includes both endogenous and exogenous markers related to different diseases as part of the research. Connecting both endogenous and exogenous markers can help explain many associations between environmental chemicals and metabolic profiles, which can be stressors for causing different diseases. READ MORE