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. 4 th Hybrid and Organic Photovoltaic Conference -Uppsala 2012 185 C65 – Incorporation of Carbon Nanotubes into Organic Polymer Monolithic Columns for Capillary Chromatography Abdulrahman Alwarthan a , Ahmad Aqel b a, King Saud University, Chemistry Department, Science College , Riyadh, 11456, SA b, King Abdullah Institute for Nanotechnology, College of Science, SA This work describes fabrication of polymer monolithic materials to be used as stationary phases in capillary liquid chromatography. Multi-wall carbon nanotubes (MWCNT) were incorporated into an organic polymer monolith containing benzyl methacrylate (BMA) and ethylene dimethacrylate (EDMA). The porogenic solvents were selected to maintain a uniform polymer matrix in the capillary column. Several columns have been synthesized in the confines of 320 µm i.d. and 150 mm length fused-silica capillaries by single step in-situ copolymerization reaction. The porous and hydrodynamic properties; i.e. porosities, permeabilities and mechanical stabilities of the prepared monolithic columns were thoroughly investigated. Also, their morphology were characterized by using different techniques, such as the optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectra and thermogravimetric analysis (TGA). The columns were then chromatographically evaluated; efficiency and performance towards different sets of analytes were obtained and compared, mixtures of ketonic and phenolic compounds were successfully separated and evaluated. Figure 1 References [1] Y. Xu, Q. Cao, F. Svec, JMJ. Frechet, Anal Chem 82 (2010) 3352. [2] A. Duan, S. Xie, L. Yuan, Anal Bioanal Chem 399 (2011) 143. © SEFIN 2012
4 th Hybrid and Organic Photovoltaic Conference -Uppsala 2012 186 C66 - Harnessing biodiversity potential in the quest of pigment molecules for dyesensitized solar cells: From plant extracts to microorganism metabolites Leslie W. Pineda a , Karina Torres Castro a , Andrea Soto Navarro a , Darío Chinchilla b , Catalina Murillo Cruz c , Kattia Rosales Ovares c , Cindy Torres Quirós a , Carlos Meza d , Mavis L. Montero a a, Centro de Investigación en Electroquímica y Energía Química (CELEQ), Ciudad de la Investigación, Apartado 11501 2060, Universidad de Costa Rica, San José, Costa Rica b, Escuela de Química, Universidad de Costa Rica, Apartado 2060, San José, Costa Rica c, Unidad de Bioprospección del Instituto Nacional de Biodiversidad (INBio), Apartado 22-3100, Santo Domingo de Heredia, Costa Rica d, Laboratorio de Sistemas Electrónicos para la Sostenibilidad (SESLab), Instituto Tecnológico de Costa Rica, Cartago, Costa Rica The current and growing energy consumption projections in the medium- and long-term suggest the contribution of various renewable energy sources. A viable option for Costa Rica and other tropical countries is the use of solar energy using solar cells featuring high efficiencies and competitive costs. 1 Indeed, a model that portrait these concepts are sensitized solar cells based on photosynthesis bioinspired principles. 2 Relevant components in the operation of such photovoltaic devices are molecules that function as light-capturing. 3 Hence, the extraction and evaluation of novel sensitizing molecules stemming from plant extracts and microorganism metabolites might be the venue for new sources of chemical compounds that could lead to an enhancement in the efficiency of such devices. 4,5 Herein we report on the assembly and physical measurements of dye-sensitized solar cells containing natural plant dyes extracted from Justicia colorífera, Solanum mamosum, and Tradescantia zebryna, and exhibiting energy conversion efficiencies of 1.2%. Furthermore, the national bioprospecting information of a collection consisting of ca. 8.000 fungal strains is also being screened for fungal pigment production that can be used as sensitizing molecules. Interestingly, several fungal pigment colorations are obtained during its cultivation process. References [1] Torres, K.; Arrieta, J. P.; Torres, C. Q.; Montero, M. L.; Pineda, L. W. Revista Energía, 2011, 60, 6�9. [2] Grätzel, M. Nature 2001, 414, 338�344. [3] O´Reagan, B.; Grätzel, M. Nature 1991, 353, 737�740. [4] Velmurugan, P.; Kamala-Kanan, S.; Balachandar, V.; Lakshmanaperumalsamy, P.; Chae, J.; Oh, B. Carbohydrate Polymers 2010,. 79: 262�268. [5] Ito,S.; Saitou, T.; Imahori, H.; Uehara, H.; Hasegawa, N. Energy & Environmental Science 2011, 3, 905-909. © SEFIN 2012
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