Sökning: "photochromic"

Visar resultat 11 - 15 av 22 avhandlingar innehållade ordet photochromic.

1. 11. ALL-OPTICAL CONTROL OF MOLECULAR FUNCTIONS - ENERGY TRANSFER SWITCHING AND INFORMATION PROCESSING

   Författare :Magnus Bälter; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; white-light generation; molecular logic; spiropyran; photochromism; DNA-binding; diarylethene; energy transfer; all-photonic; fulgimide; dithienylethene; photoswitch; fluorescence modulation;

   Sammanfattning : In this work, the photoswitching of molecular systems endowed with photochromic functionality have been investigated for the reversible photonic gating of excitation energy transfer (FRET) reactions as well as in application for all-photonic molecular logic. The presented systems involves the integration of photochromic entities within both covalent and non-covalent designs and serves to implicate photonic switching of molecular level phenomena. LÄS MER

3. 12. Photochromism - Logic and Biologic Approaches

   Författare :Martin Hammarson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DNA-binding; molecular logic; dithienylethene; photochromism; DNA; photoswitch; spiropyran;

   Sammanfattning : Photochromism is the light-induced colour change of molecules called photo-chromic compounds. The isomerisation causes changes in the electronic properties of the molecules and rearrangements of bonds which can be used in many more applications than the observed colour change. LÄS MER

4. 13. Mesostructured materials : Synthesis towards applications

   Författare :Nina Andersson; Osamu Terasaki; Peter Alberius; Anders Palmqvist; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi; oorganisk kemi; Inorganic Chemistry;

   Sammanfattning : A new class of materials with well-defined structures on mesoscopic (2-50 nm) length scales has attracted considerable interest during the last decade. These mesostructured mataterials are formed from the self-assembly of amphiphillic molecules and inorganic precursors. LÄS MER

5. 14. Exploring new strategies of controlling DNA binding

   Författare :Johanna Andersson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Abstract Due to the increasing knowledge about DNA structure and function, as well as the fact that the sequence of the human genome is now known, DNA becomes more and more interesting as a drug target, especially for treatment of genetic diseases and cancer, but also for treatment of diseases caused by pathogens. However, one of the major challenges is to achieve specificity - in the case of genetic diseases to uniquely target a specific gene and in the case of the cancer and pathogens to target specific cells. LÄS MER

7. 15. Quantum transport in photoswitching molecules : An investigation based on ab initio calculations and Non Equilibrium Green Function theory

   Författare :Anders Odell; Anna Delin; Anders Niklasson; Jonas Fransson; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; molecular electronics; electron transport; electron structure; density functional theory; non equilibrium green function theory; Electronic structure; Elektronstruktur;

   Sammanfattning : Molecular electronics is envisioned as a possible next step in device miniaturization. It is usually taken to mean the design and manufacturing of electronic devices and applications where organic molecules work as the fundamental functioning unit. LÄS MER