Papers by Marta Ruiz-bermejo
Physical Chemistry Chemical Physics, 2023
The ammonium cation has a significant influence on the wet chemistry of HCN, modulating the prope... more The ammonium cation has a significant influence on the wet chemistry of HCN, modulating the properties of the obtained macromolecular systems.
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... Susana Osuna-Esteban and Sabino Veintemillas-Verdaguer Centro de Astrobiología [Consejo Super... more ... Susana Osuna-Esteban and Sabino Veintemillas-Verdaguer Centro de Astrobiología [Consejo Superior de Investigaciones Científicas-Instituto Nacional de ... microreactors in the formation of the first bioorganic compounds and in the origin of homochirality (Donaldson et al. ...
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Chemistry: A European Journal, Jul 28, 2016
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Polymer Degradation and Stability, May 1, 2011
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Icarus, Jun 1, 2013
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Planetary and Space Science, Sep 1, 2013
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Origins of Life and Evolution of Biospheres, Sep 27, 2007
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Origins of Life and Evolution of Biospheres, Nov 29, 2006
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Lunar and Planetary Science Conference, Mar 1, 2017
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Journal of Thermal Analysis and Calorimetry, Jan 5, 2012
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Crystallization Process from solution. The present invention relates to a new method and a device... more Crystallization Process from solution. The present invention relates to a new method and a device for obtaining crystals of a substance comprising: (i) preparing a saturated solution of the substance to be crystallized in a suitable solvent in a reaction vessel solution; (Ii) generating an aerosol in the reaction vessel; (Iii) crystallisation of the substance; and (iv) recovering the crystals at the bottom of the reaction vessel. The process is especially suitable stop crystallized substances crystallize typically difficult and may lead to a result of chiral amplification.
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Chemistry & Biodiversity, Dec 1, 2008
The recent evidences of presence of subsurface oceans of liquid water and ice on Saturn&a... more The recent evidences of presence of subsurface oceans of liquid water and ice on Saturn's moons, and the possible presence and astrobiological importance of polycyclic aromatic hydrocarbons (PAHs) in these environments, provide strong motivation for the exploration of the prebiotic chemistry in ice and to test if PAHs could be experimentally synthesized in ice surfaces under atmospheres containing methane as carbon source. In this work, we present a new design for prebiotic-chemistry experiments in ice matrix. Using this design, a mixture of products including PAHs, polar aromatic compounds, and hydrophilic acetylene-based polymers was obtained. We propose that acetylene generation in a methane/nitrogen atmosphere and subsequent polymerization to PAHs and polyynes could be a favored pathway in the presence of water freeze-melt cycles. These results shed light on the processes involved in PAH synthesis in icy environments and on the physical factors that drive the different competing pathways in methane/nitrogen atmospheres.
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<p><span id="page3R_mcid5" class="markedContent">... more <p><span id="page3R_mcid5" class="markedContent"><span dir="ltr" role="presentation">The effect of mineral surfaces on increasing molecular</span> <span dir="ltr" role="presentation">com</span><span dir="ltr" role="presentation">plexity has been considered an</span><br role="presentation" /><span dir="ltr" role="presentation">important topic in studies on the origin of life</span> <span dir="ltr" role="presentation">[1]</span><span dir="ltr" role="presentation">. In addition, HCN is considered a key molecule</span><br role="presentation" /><span dir="ltr" role="presentation">in the research</span> <span dir="ltr" role="presentation">abou</span><span dir="ltr" role="presentation">t the chemical evolution. Als</span><span dir="ltr" role="presentation">o, HCN polymers are considered</span> <span dir="ltr" role="presentation">keys in</span> <span dir="ltr" role="presentation">the</span><br role="presentation" /><span dir="ltr" role="presentation">formation of the first protometa</span><span dir="ltr" role="presentation">bolic systems and</span> <span dir="ltr" role="presentation">they</span> <span dir="ltr" role="presentation">may be</span> <span dir="ltr" role="presentation">among the</span> <span dir="ltr" role="presentation">most readily formed</span><br role="presentation" /><span dir="ltr" role="presentation">organic</span> <span dir="ltr" role="presentation">macromolecules in the solar system</span> <span dir="ltr" role="presentation">[2]</span><span dir="ltr" role="presentation">.</span></span><span id="page3R_mcid6" class="markedContent"><br role="presentation" /><span dir="ltr" role="presentation">Rece</span><span dir="ltr" role="presentation">ntl</span><span dir="ltr" role="presentation">y, it</span> <span dir="ltr" role="presentation">was s</span><span dir="ltr" role="presentation">howed that the HCN</span><span dir="ltr" role="presentation">-</span><span dir="ltr" role="presentation">based polymeric films over pyrite surfaces act as</span><br role="presentation" /><span dir="ltr" role="presentation">protective films</span><span dir="ltr" role="presentation">. Preventing to the</span> <span dir="ltr" role="presentation">oxidation the high reactive pyrite surface under ambient</span><br role="presentation" /><span dir="ltr" role="presentation">conditions of moisture, light an air of a standar</span><span dir="ltr" role="presentation">d</span> <span dir="ltr" role="presentation">chemistry lab</span><span dir="ltr" role="presentation">. The unexpected beha</span><span dir="ltr" role="presentation">v</span><span dir="ltr" role="presentation">io</span><span dir="ltr" role="presentation">ur</span> <span dir="ltr" role="presentation">of</span><br role="presentation" /><span dir="ltr" role="presentation">the pyrite/HCN polymeric film e</span><span dir="ltr" role="presentation">ncourag</span><span dir="ltr" role="presentation">es us to explore in deep</span> <span dir="ltr" role="presentation">these systems</span> <span dir="ltr" role="presentation">under early</span> <span dir="ltr" role="presentation">Earth</span><br role="presentation" /><span dir="ltr" role="presentation">conditions</span> <span dir="ltr" role="presentation">due the new insight open in preb</span><span dir="ltr" role="presentation">iotic chemistry</span> <span dir="ltr" role="presentation">[3]</span><span dir="ltr" role="presentation">.</span></span><span id="page3R_mcid7" class="markedContent"><br role="presentation" /><span dir="ltr" role="presentation">S</span><span dir="ltr" role="presentation">ince the UV radiation can be an i</span><span dir="ltr" role="presentation">mportant factor in the</span> <span dir="ltr" role="presentation">increasing of the molecular</span> <span dir="ltr" role="presentation">complexity</span><span dir="ltr" role="presentation">,</span><br role="presentation" /><span dir="ltr" role="presentation">in this work the role of the protective films over pyrite surfaces were study by</span> <span dir="ltr" role="presentation">XPS after</span><br role="presentation" /><span dir="ltr" role="presentation">irradiation of the samples during long exposure times.</span> <span dir="ltr"…
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Polymers
Aminomalononitrile (AMN), the HCN formal trimer, is a molecule of interest in prebiotic chemistry... more Aminomalononitrile (AMN), the HCN formal trimer, is a molecule of interest in prebiotic chemistry, in fine organic synthesis, and, currently, in materials science, mainly for bio-applications. Herein, differential scanning calorimetry (DSC) measurements by means of non-isothermal experiments of the stable AMN p-toluenesulfonate salt (AMNS) showed successful bulk AMN polymerization. The results indicated that this thermally stimulated polymerization is initiated at relatively low temperatures, and an autocatalytic kinetic model can be used to appropriately describe, determining the kinetic triplet, including the activation energy, the pre-exponential factor, and the mechanism function (Eα, A and f(α)). A preliminary structural characterization, by means of Fourier transform infrared (FTIR) spectroscopy, supported the effective generation of HCN-derived polymers prepared from AMNS. This study demonstrated the autocatalytic, highly efficient, and straightforward character of AMN polyme...
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Polymer Degradation and Stability
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Chemistry and Biodiversity, 2008
The recent evidences of presence of subsurface oceans of liquid water and ice on Saturn&a... more The recent evidences of presence of subsurface oceans of liquid water and ice on Saturn's moons, and the possible presence and astrobiological importance of polycyclic aromatic hydrocarbons (PAHs) in these environments, provide strong motivation for the exploration of the prebiotic chemistry in ice and to test if PAHs could be experimentally synthesized in ice surfaces under atmospheres containing methane as carbon source. In this work, we present a new design for prebiotic-chemistry experiments in ice matrix. Using this design, a mixture of products including PAHs, polar aromatic compounds, and hydrophilic acetylene-based polymers was obtained. We propose that acetylene generation in a methane/nitrogen atmosphere and subsequent polymerization to PAHs and polyynes could be a favored pathway in the presence of water freeze-melt cycles. These results shed light on the processes involved in PAH synthesis in icy environments and on the physical factors that drive the different competing pathways in methane/nitrogen atmospheres.
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Polymers, 2021
A systematic study is presented to explore the NH4CN polymerization induced by microwave (MW) rad... more A systematic study is presented to explore the NH4CN polymerization induced by microwave (MW) radiation, keeping in mind the recent growing interest in these polymers in material science. Thus, a first approach through two series, varying the reaction times and the temperatures between 130 and 205 °C, was conducted. As a relevant outcome, using particular reaction conditions, polymer conversions similar to those obtained by means of conventional thermal methods were achieved, with the advantage of a very significant reduction of the reaction times. The structural properties of the end products were evaluated using compositional data, spectroscopic measurements, simultaneous thermal analysis (STA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). As a result, based on the principal component analysis (PCA) from the main experimental results collected, practically only the crystallographic features and the morphologies in the nanoscale were affected by the MW-driven po...
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European Polymer Journal, 2021
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Polymers
For the first time, chemometrics was applied to the recently reported microwave-driven cyanide po... more For the first time, chemometrics was applied to the recently reported microwave-driven cyanide polymerization. Fast, easy, robust, low-cost, and green-solvent processes are characteristic of these types of reactions. These economic and environmental benefits, originally inspired by the constraints imposed by plausible prebiotic synthetic conditions, have taken advantage of the development of a new generation of HCN-derived multifunctional materials. HCN-derived polymers present tunable properties by temperature and reaction time. However, the apparently random behavior observed in the evolution of cyanide polymerizations, assisted by microwave radiation over time at different temperatures, leads us to study this highly complex system using multivariate analytical tools to have a proper view of the system. Two components are sufficient to explain between 84 and 98% of the total variance in the data in all principal component analyses. In addition, two components explain more than 91%...
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Papers by Marta Ruiz-bermejo