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La integración de vegetación en la envolvente edilicia permite reducir el consumo energético de refrigeración en verano y mejorar las condiciones de confort interior en edificios. Esto se debe a que, en verano, las plantas son energéticamente más eficientes que los elementos de sombreado tradicionales debido a que las hojas regulan su temperatura superficial a través de la evapotranspiración. En este marco, el objetivo del presente trabajo consiste en estudiar la eficiencia de una doble fachada vegetal aplicada a una vivienda social del IPV ubicada en la ciudad de Salta, la cual se simula para cuatro posibles orientaciones. Para ello, se utilizó el software SIMEDIF en su reciente versión 2.0, que incluye el modelo térmico de dobles fachadas vegetales. Se analizó la disminución de la temperatura interior y de la temperatura superficial de los muros, de acuerdo a sus orientaciones. Los resultados muestran que, en días calurosos en la ciudad de Salta, sería posible obtener disminuciones de entre 13°C y 20ºC en la temperatura superficial de muros Este y Oeste y de entre 0.3ºC y 1.5ºC en los ambientes interiores. Se concluye que, para el clima de Salta, las dobles fachadas vegetales son una estrategia útil para disminuir las temperaturas interiores en verano y reducir el consumo energético destinado a refrigeración., One of the effective ways to reduce summer energy consumption in buildings is the integration of vegetation in the building envelope, in particular, the double green facades. The reason is that, in summer, plants are more energy efficient than traditional shading elements because of their lower surface temperature, that is, the leaves regulate their temperatures through evapotranspiration. The thermal modelling of a double green facade must include these biological aspects that affect the energy balance of the leaves, and it is not usually included in the available thermal simulation software. SIMEDIF software in its recent version 2.0 includes this model. Within this framework, the objective of this work is to study the efficiency of a double green facade applied to a social housing of the IPV located in the city of Salta, which is simulated for four possible orientations. The decrease of the interior temperature and that of the surface wall’ temperatures are analyzed through transient thermal simulation. The results show that, on hot summer days in Salta city, it would be possible to obtain decreases ranging between 13 and 20ºC in the surface temperature of East and West walls and between 0.3ºC and 1.5ºC in the indoor environments., Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES)

The field of organic electronics has experienced a vast development in the last few years, having the first generation of devices based in this technology already reached the market. Advances achieved in this field have been associated with the research of organic semiconductors able to transport charge carriers with a high mobility. However, finding organic semiconductors with the right balance between mobility and processability is still a challenge in the area. In this context, discotic liquid crystals, constituted by an aromatic central core surrounded by flexible alkyl tails, are among the most promising new candidates. Triindoles have been widely studied as a π-conjugated platforms in the construction of high mobility semiconducting liquid crystals. Three-fold oxidative cyclodehydrogenation of hexaphenyltriindole renders the significantly enlarged aromatic core, with structural characteristics of both triphenylene moieties and triindole. In this π-extended discotic core, the attachment of three flexible alkyl chains to the nitrogen atoms is sufficient to induce mesomorphism. The ratio of conducting versus isolating fraction is impressively enhanced when comparing to triindole liquid crystals, not only by enlarging the size of the central core but also by reducing the amount of isolating peripheral chains. In this presentation the electrical properties of the aforementioned semiconductor have been analyzed by applying two different methods: space-charge limited current (SCLC) measurements in a diode-like structure and field effect mobility measurements in a thin film transistor device. The mobility found on a diode type device is higher than that determined on thin film transistors, which can be understood by the high tendency of large π-conjugated molecules to deposit on surfaces with their extended core parallel to the substrate. This is demonstrated with a full analysis of the active layer of the thin film transistor, in order to analyze the molecular orientation in the semiconductor-dielectric interface, via Surface Enhanced Raman Spectroscopy (SERS). The observation of field effect behavior in a discotic liquid crystal processed by simple drop-casing suggests an increased dimensionality of charge transport by facilitating hopping between neighboring columns as a result of the large conducting/isolating ratio found in this discotic platform. Density Functional Theory (DFT) calculations have been performed in order to enlighten with more detail the charge-transport parameters at a molecular level. Universidad de Málaga, Campus de Excelencia Internacional Andalucía Tech

During the last decade heptacyclic 10,15-dihydro-5H-diindolo[3,2-a:3',2'-c]carbazole (triindole) has been extensively studied as a new π-conjugated platform in the construction of self-assembling materials for optoelectronics. Specially remarkably is the record hole mobility values determined on triindole liquid crystals.1 In order to facilitate the design of new materials on a molecular basis and establish clear guidelines to fine tuning electronic parameters, we have recently synthesized new triindole and tetraindole-based systems.2-3 Our joint experimental and theoretical investigation shows that N-substitution, symmetry lowering of the platform, and insertion of π-spacers in extended dimers strongly impact on the fundamental electronic properties of triindoles.2 In addition, saddle-shaped tetraindoles are found to be an interesting 3D rigid scaffold to obtain electroactive molecules with increased dimensionality.3 We hope that this study can not only advance useful structure-property relationships of conjugated indole-based systems but also guide the design of new materials with potential applications in organic electronics.References 1. E.M. García-Frutos, U.K. Pandey, R. Termine, A. Omenat, J. Barberá, J.L. Serrano, A. Golemme, B. Gómez-Lor, Angew. Chem. Int. Ed. 2011, 50, 7399 2. a) C. Ruiz, J.T. López Navarrete, M.C.Ruiz Delgado, B. Gómez-Lor, Org. Lett. 2015, 17, 2258−2261. b) C. Ruiz, E.M. García-Frutos, D.A. da Silva Filho, J.T. López Navarrete, M.C. Ruiz Delgado, and B. Gómez-Lor, J. Phys. Chem. C 2014, 118, 5470−5477 3. C. Ruiz, A. Monge, E. Gutiérrez-Puebla, I. Alkorta, J. Elguero, J. T. López Navarrete, M.C. Ruiz Delgado and B. Gómez-Lor, submitted Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.