PRUSSIAN BLUE · Multifunctional molecular switches based on Prussian Blue analogues
6РП — Действия „Мария Кюри“
- Период
- 2007-01-16 → 2009-01-15
- Финансиране от ЕС
- 149 842 €
- Участници
- 1
- Схема
- EIF
Линиите свързват координатора с партньорите.
Накратко на български
Многослойни тънки филми от глинени минерали и органични молекули се използват за създаване на подредени структури от молекулярни превключватели. По-доброто разбиране на техния растеж помага за намаляване на дефектите и подобряване на свойствата на крайния материал.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - PRUSSIAN BLUE (Multifunctional molecular switches based on Prussian Blue analogues)
The main objective of the project was to find synthetic approaches for thin films in which one can incorporate, in a controlled way, different kinds of molecular materials that exhibit interesting properties. The structure of the thin film we propose is made by repeating units of one layer of a material playing a templating role (inactive part) on which we can grow, in an ordered way, a molecular compound exhibiting a certain property (the active part of the material). The template we used in this project is a hybrid film made by clay mineral platelets and amphiphilic molecules (organic compounds which present both a hydrophilic (attracted to water) and a hydrophobic part (rejected by the water)), bound together through electrostatic interactions. Following this approach we are able to transfer the hybrid layer onto a solid substrate and to subsequently grow, on the external part of this film, the molecular material we are interested in. By repeating this cycle many times, we can construct a multilayer film. The properties of the final material will depend to a large extend on how ordered the film is. To control the growth process and to decrease the number of defects, a better insight into the structure and the assembly processes is needed. However, up to date, the structure of this kind of films is not well understood and for this reason, we focused our efforts on the growth process of the multilayer films. Our most important scientific achievements are related to new information we manage to collect concerning the structure of this type of multilayer materials. Also, we propose new synthetic approaches leading to a more ordered, almost defects-free structure. Using these approaches, we have been able to synthesise and characterise new molecular materials exhibiting interesting properties.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Mixed valence polycyanides (Prussian Blue analogues) are prototypical multifunctional materials. They possess a rich palette of properties spanning room temperature ferromagnetism to zero thermal expansion which can be easily tuned by chemical modification s or the application of external stimuli (temperature, pressure, magnetic field, light irradiation). The versatility of the M-CN-M molecular-scale building block (M and M are divalent and trivalent transition-metal cations) can be exploited to prepare novel multifunctional magneto-optical materials. However, while molecule-based materials can combine physical and chemical properties associated with molecular-scale building blocks, their successful integration into real applications depends primarily on higher-order properties- crystal size, shape, morphology and organization.A new frontier in this area would be to develop approaches in which interfaces can play simultaneously the dual role of (i) structure-facilitating features in the assembly of nano-networked architectures as space confining reaction media and (ii) of facile tuning, coupling and optimisation of the functionalities of the materials both in their bulk form and during their positioning at surfaces. Within this context, the project involves the use of clay minerals as structure directing interfaces to afford low dimensional networks and nano-scaled high order architectures based on the cyanide M-CN-M building block.This will allow the control of size related properties and will lead to the production of molecular materials with organization on multiple scale length. In addition, the use of such templating agents will provide ready-to-use and easy means for transferring the materials in a controlled fashion to solid supports opening the way for the preparation of thin films based on metal cyanide architectures whose magnetic and optical multi-functionalities can be coupled and tailored a priori.
Оригинален текст от CORDIS (на английски).
Участници
- RIJKSUNIVERSITEIT GRONINGEN · GRONINGENКоординаторНидерландия
Връзки
Данни: CORDIS, © Европейски съюз