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Zhu R, Liu Q, He Y, Liang P. Rapid construction of nickel phyllosilicate with ultrathin layers and high performance for CO 2 methanation. J Colloid Interface Sci 2024; 668:352-365. [PMID: 38678890 DOI: 10.1016/j.jcis.2024.04.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/21/2024] [Accepted: 04/24/2024] [Indexed: 05/01/2024]
Abstract
The traditional techniques for the synthesis of nickel phyllosilicates usually time-consuming and energy-intensive, which often lead to the formation of layers with excessive thickness due to uncontrolled crystal growth. In order to overcome these challenges, this work introduces a microwave-assisted synthesis strategy to facilitate the synthesis of Ni-phyllosilicate-based catalysts within an exceptionally short duration of only five minutes, attaining a peak temperature of merely 102 °C. To enhance the specific surface area and to increase the exposure of active sites, an investigation was conducted involving three surfactants. The employment of hexadecyl trimethyl ammonium bromide (CTAB) has yielded remarkable results, with an ultrahigh specific surface area reaching 535 m2 g-1 and an ultrathin lamellar thickness of 1.43 nm. The catalyst exhibited an impressive CO2 conversion of 81.7 % at 400 °C, 60 L g-1 h-1, 0.1 MPa. It also demonstrated a substantial turnover frequency for CO2 (TOFCO2) of 5.4 ± 0.1 × 10-2 s-1, alongside a relatively low activation energy (Ea) of 80.74 kJ·mol-1. Moreover, the catalyst maintained its high stability over a period of 100 h and displayed high resistance to sintering. To further elucidate growth temperature gradient of the catalyst and concentration gradient of the materials involved, COMSOL Multiphysics (COMSOL) simulations were effectively utilized. In conclusion, this work breaks the limitation associated with traditional, laborious synthesis methods for Ni-phyllosilicates, which can produce materials with high surface area and thin-layer characteristics.
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Affiliation(s)
- Ruixuan Zhu
- Key Laboratory of Low Carbon Energy and Chemical Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Qing Liu
- Key Laboratory of Low Carbon Energy and Chemical Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Yan He
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China.
| | - Peng Liang
- Key Laboratory of Low Carbon Energy and Chemical Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
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2
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Multivariate Analysis Applied to Microwave-Driven Cyanide Polymerization: A Statistical View of a Complex System. Polymers (Basel) 2023; 15:polym15020410. [PMID: 36679288 PMCID: PMC9866860 DOI: 10.3390/polym15020410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/30/2022] [Accepted: 01/04/2023] [Indexed: 01/15/2023] Open
Abstract
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% of the total variance in the data in the case of principal component analysis for categorical data. These consistent statistical results indicate that microwave-driven polymerization is a more robust process than conventional thermal syntheses but also that plausible prebiotic chemistry in alkaline subaerial environments could be more complex than in the aerial part of these systems, presenting a clear example of the "messy chemistry" approach of interest in the research about the origins of life. In addition, the methodology discussed herein could be useful for the data analysis of extraterrestrial samples and for the design of soft materials, in a feedback view between prebiotic chemistry and materials science.
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3
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Basavarajappa GM, Priyanka KM, Goudanavar P, Narasimha LG, Naveen NR, Gowthami B, Fattepur S, Shiroorkar PN, Nagaraja S, Telsang M, Jasthi VC, Sreenivasalu PKP. A spotlight on application of microwave-assisted modifications of plant derived polymers in designing novel drug delivery systems. Des Monomers Polym 2023; 26:106-116. [PMID: 37008384 PMCID: PMC10064828 DOI: 10.1080/15685551.2023.2194176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023] Open
Abstract
Polymers are a fundamental part of numerous industries and can be conjugated with many other materials and components to have a vast array of products. Biomaterials have been extensively studied for their application in pharmaceutical formulation development, tissue engineering, and biomedical areas. However, the native form of many polymers has limitations concerning microbial contamination, susceptibility, solubility, and stability. Chemical or physical modifications can overcome these limitations by tailoring the properties of polymers to meet several requirements. The polymer modifications are interdisciplinary, cutting across conventional materials, physics, biology, chemistry, medicine, and engineering limitations. Microwave irradiation has become a well-established technique for a few decades to drive and promote chemical modification reactions. This technique allows ease of temperature and power control to perform the synthesis protocols efficiently. Additionally, microwave irradiation contributes to green and sustainable chemistry. In this contribution, microwave-assisted polymer modifications were described with a special focus on their application in developing several novel dosage forms.
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Affiliation(s)
| | - K M Priyanka
- Department of Pharmaceutics, Sri Adichunchanagiri College of Pharmacy, Adichunchanagiri University, B.G.Nagar, Karnataka, India
| | - Prakash Goudanavar
- Department of Pharmaceutics, Sri Adichunchanagiri College of Pharmacy, Adichunchanagiri University, B.G.Nagar, Karnataka, India
| | | | - N. Raghavendra Naveen
- Department of Pharmaceutics, Sri Adichunchanagiri College of Pharmacy, Adichunchanagiri University, B.G.Nagar, Karnataka, India
- CONTACT N. Raghavendra Naveen Department of Pharmaceutics, Sri Adichunchanagiri College of Pharmacy, Adichunchanagiri University, B.G.NagarKarnataka, 571448, India
| | - Buduru Gowthami
- Annamacharya College of Pharmacy, New Boyanapalli, Rajampet, Andhra Pradesh, India
| | - Santosh Fattepur
- School of Pharmacy, Management and Science University, Shah Alam, Selangor, Malaysia
- Santosh Fattepur School of Pharmacy, School of Pharmacy, Seksyen 13, Shah Alam40100, Malaysia
| | | | - Sreeharsha Nagaraja
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Hofuf, Al-Ahsa, Kingdom of Saudi Arabia
- Department of Pharmaceutics, Vidya Siri College of Pharmacy, Off Sarjapura Road, Bangalore, India
- Sreeharsha Nagaraja Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Hofuf, Al-Ahsa31982, Kingdom of Saudi Arabia
| | - Mallikarjun Telsang
- Department of Surgery, College of Medicine, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Veeriah Chowdary Jasthi
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, King Faisal University, Al-Ahsa, Saudi Arabia
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Prebiotic synthesis of noncanonical nucleobases under plausible alkaline hydrothermal conditions. Sci Rep 2022; 12:15140. [PMID: 36071125 PMCID: PMC9452575 DOI: 10.1038/s41598-022-19474-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 08/30/2022] [Indexed: 11/08/2022] Open
Abstract
Herein, the potential of alkaline hydrothermal environments for the synthesis of possible ancestral pre-RNA nucleobases using cyanide as a primary source of carbon and nitrogen is described. Water cyanide polymerizations were assisted by microwave radiation to obtain high temperature and a relatively high pressure (MWR, 180 °C, 15 bar) and were also carried out using a conventional thermal system (CTS, 80 °C, 1 bar) to simulate subaerial and aerial hydrothermal conditions, respectively, on the early Earth. For these syntheses, the initial concentration of cyanide and the diffusion effects were studied. In addition, it is well known that hydrolysis conditions are directly related to the amount and diversity of organic molecules released from cyanide polymers. Thus, as a first step, we studied the effect of several hydrolysis procedures, generally used in prebiotic chemistry, on some of the potential pre-RNA nucleobases of interest, together with some of their isomers and/or deamination products, also presumably formed in these complex reactions. The results show that the alkaline hydrothermal scenarios with a relatively constant pH are good geological scenarios for the generation of noncanonical nucleobases using cyanide as a prebiotic precursor.
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Ruiz-Bermejo M, García-Armada P, Valles P, de la Fuente JL. Semiconducting Soft Submicron Particles from the Microwave-Driven Polymerization of Diaminomaleonitrile. Polymers (Basel) 2022; 14:polym14173460. [PMID: 36080535 PMCID: PMC9460857 DOI: 10.3390/polym14173460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/12/2022] [Accepted: 08/15/2022] [Indexed: 11/16/2022] Open
Abstract
The polymers based on diaminomaleonitrile (DAMN polymers) are a special group within an extensive set of complex substances, namely HCN polymers (DAMN is the formal tetramer of the HCN), which currently present a growing interest in materials science. Recently, the thermal polymerizability of DAMN has been reported, both in an aqueous medium and in bulk, offering the potential for the development of capacitors and biosensors, respectively. In the present work, the polymerization of this plausible prebiotic molecule has been hydrothermally explored using microwave radiation (MWR) via the heating of aqueous DAMN suspensions at 170–190 °C. In this way, polymeric submicron particles derived from DAMN were obtained for the first time. The structural, thermal decomposition, and electrochemical properties were also deeply evaluated. The redox behavior was characterized from DMSO solutions of these highly conjugated macromolecular systems and their potential as semiconductors was described. As a result, new semiconducting polymeric submicron particles were synthetized using a very fast, easy, highly robust, and green-solvent process. These results show a new example of the great potential of the polymerization assisted by MWR associated with the HCN-derived polymers, which has a dual interest both in chemical evolution and as functional materials.
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Affiliation(s)
- Marta Ruiz-Bermejo
- Departamento de Evolución Molecular, Centro de Astrobiología (INTA-CSIC), Ctra. Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain
- Correspondence: ; Tel.: +34-915206458
| | - Pilar García-Armada
- Department of Industrial Chemical Engineering, Escuela Técnica Superior de Ingenieros Industriales, Universidad Politécnica de Madrid, José Gutiérrez Abascal, 2, 28006 Madrid, Spain
| | - Pilar Valles
- Instituto Nacional de Técnica Aeroespacial “Esteban Terradas” (INTA), Ctra. Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain
| | - José L. de la Fuente
- Instituto Nacional de Técnica Aeroespacial “Esteban Terradas” (INTA), Ctra. Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain
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6
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Hockey EK, Vlahos K, Howard T, Palko J, Dodson LG. Weakly Bound Complex Formation between HCN and CH 3Cl: A Matrix-Isolation and Computational Study. J Phys Chem A 2022; 126:3110-3123. [PMID: 35583384 DOI: 10.1021/acs.jpca.2c00716] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The matrix-isolated infrared spectrum of a hydrogen cyanide-methyl chloride complex was investigated in a solid argon matrix. HCN and CH3Cl were co-condensed onto a substrate held at 10 K with an excess of argon gas, and the infrared spectrum was measured using Fourier-transform infrared spectroscopy. Quantum chemical geometry optimization, harmonic frequency, and natural bonding orbital calculations indicate stabilized hydrogen- and halogen-bonded structures. The two resulting weakly bound complexes are both composed of one CH3Cl molecule bound to a (HCN)3 subunit, where the three HCN molecules are bound head-to-tail in a ring formation. Our study suggests that─in the presence of CH3Cl─the formation of (HCN)3 is promoted through complexation. Since HCN aggregates are an important precursor to prebiotic monomers (amino acids and nucleobases) and other life-bearing polymers, this study has astrophysical implications toward the search for life in space.
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Affiliation(s)
- Emily K Hockey
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Korina Vlahos
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Thomas Howard
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Jessica Palko
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Leah G Dodson
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
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7
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HCN-derived polymers from thermally induced polymerization of diaminomaleonitrile: A non-enzymatic peroxide sensor based on prebiotic chemistry. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2021.110897] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Pérez-Fernández C, Valles P, González-Toril E, Mateo-Martí E, de la Fuente JL, Ruiz-Bermejo M. Tuning the Morphology in the Nanoscale of NH 4CN Polymers Synthesized by Microwave Radiation: A Comparative Study. Polymers (Basel) 2021; 14:57. [PMID: 35012081 PMCID: PMC8747084 DOI: 10.3390/polym14010057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/16/2021] [Accepted: 12/20/2021] [Indexed: 11/22/2022] Open
Abstract
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 polymerization conditions with respect to those obtained by classical syntheses. Therefore, MW radiation allows us to tune the morphology, size and shape of the particles from the bidimensional C=N networks which are characteristic of the NH4CN polymers by an easy, fast, low-cost and green-solvent production. These new insights make these macromolecular systems attractive for exploration in current soft-matter science.
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Affiliation(s)
- Cristina Pérez-Fernández
- Centro de Astrobiología (INTA-CSIC), Departamento de Evolución Molecular, Ctra. Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (C.P.-F.); (E.G.-T.); (E.M.-M.)
| | - Pilar Valles
- Instituto Nacional de Técnica Aeroespacial “Esteban Terradas” (INTA), Ctra. Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (P.V.); (J.L.d.l.F.)
| | - Elena González-Toril
- Centro de Astrobiología (INTA-CSIC), Departamento de Evolución Molecular, Ctra. Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (C.P.-F.); (E.G.-T.); (E.M.-M.)
| | - Eva Mateo-Martí
- Centro de Astrobiología (INTA-CSIC), Departamento de Evolución Molecular, Ctra. Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (C.P.-F.); (E.G.-T.); (E.M.-M.)
| | - José Luis de la Fuente
- Instituto Nacional de Técnica Aeroespacial “Esteban Terradas” (INTA), Ctra. Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (P.V.); (J.L.d.l.F.)
| | - Marta Ruiz-Bermejo
- Centro de Astrobiología (INTA-CSIC), Departamento de Evolución Molecular, Ctra. Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (C.P.-F.); (E.G.-T.); (E.M.-M.)
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9
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Enchev V, Slavova S. Self-catalytic mechanism of prebiotic reactions: from formamide to pterins and guanine. Phys Chem Chem Phys 2021; 23:19043-19053. [PMID: 34612442 DOI: 10.1039/d1cp02158c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction pathway of prebiotic reactions for formation of the pteridines: pterin, xanthopterine, isoxanthopterine and leucopterine, as well as the purine nucleobase guanine from pure formamide are presented. In these reactions, formamide or its tautomer, formimidic acid, play the role of proton-carrying catalyst. All required raw materials, such as hydrogen cyanide, ammonia, water, formic acid, urea, 2-aminomalononitrile, glyoxal, glyoxylic acid and oxalic acid needed in the self-catalyzed reactions are obtained by partial decomposition of formamide. We show that the prebiotic formation of nucleobases and pterins is closely linked and they probably coexisted at the beginning of chemical evolution.
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Affiliation(s)
- Venelin Enchev
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Al-tarawneh SS, Ababneh T, Aljaafreh I. Amination of ether-linked polymers via the application of Ullmann-coupling reaction: synthesis, characterization, porosity, and thermal stability evaluation. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2021. [DOI: 10.1080/1023666x.2021.1947662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Suha S. Al-tarawneh
- Department of Chemistry and Chemical Technology, Tafila Technical University, Tafila, Jordan
| | - Taher Ababneh
- Chemistry Department, Yarmouk University, Irbid, Jordan
| | - Ibtesam Aljaafreh
- Department of Chemistry and Chemical Technology, Tafila Technical University, Tafila, Jordan
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Villafañe-Barajas SA, Ruiz-Bermejo M, Rayo-Pizarroso P, Gálvez-Martínez S, Mateo-Martí E, Colín-García M. A Lizardite-HCN Interaction Leading the Increasing of Molecular Complexity in an Alkaline Hydrothermal Scenario: Implications for Origin of Life Studies. Life (Basel) 2021; 11:life11070661. [PMID: 34357033 PMCID: PMC8305185 DOI: 10.3390/life11070661] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/18/2021] [Accepted: 06/29/2021] [Indexed: 11/16/2022] Open
Abstract
Hydrogen cyanide, HCN, is considered a fundamental molecule in chemical evolution. The named HCN polymers have been suggested as precursors of important bioorganics. Some novel researches have focused on the role of mineral surfaces in the hydrolysis and/or polymerization of cyanide species, but until now, their role has been unclear. Understanding the role of minerals in chemical evolution processes is crucial because minerals undoubtedly interacted with the organic molecules formed on the early Earth by different process. Therefore, we simulated the probable interactions between HCN and a serpentinite-hosted alkaline hydrothermal system. We studied the effect of serpentinite during the thermolysis of HCN at basic conditions (i.e., HCN 0.15 M, 50 h, 100 °C, pH > 10). The HCN-derived thermal polymer and supernatant formed after treatment were analyzed by several complementary analytical techniques. The results obtained suggest that: (I) the mineral surfaces can act as mediators in the mechanisms of organic molecule production such as the polymerization of HCN; (II) the thermal and physicochemical properties of the HCN polymer produced are affected by the presence of the mineral surface; and (III) serpentinite seems to inhibit the formation of bioorganic molecules compared with the control (without mineral).
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Affiliation(s)
- Saúl A. Villafañe-Barajas
- Posgrado en Ciencias de la Tierra, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City 04510, Mexico;
| | - Marta Ruiz-Bermejo
- Departamento de Evolución Molecular, Centro de Astrobiología (CSIC-INTA), Ctra, Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (P.R.-P.); (S.G.-M.); (E.M.-M.)
- Correspondence: ; Tel.: +34-915206458; Fax: +34-915206410
| | - Pedro Rayo-Pizarroso
- Departamento de Evolución Molecular, Centro de Astrobiología (CSIC-INTA), Ctra, Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (P.R.-P.); (S.G.-M.); (E.M.-M.)
| | - Santos Gálvez-Martínez
- Departamento de Evolución Molecular, Centro de Astrobiología (CSIC-INTA), Ctra, Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (P.R.-P.); (S.G.-M.); (E.M.-M.)
| | - Eva Mateo-Martí
- Departamento de Evolución Molecular, Centro de Astrobiología (CSIC-INTA), Ctra, Torrejón-Ajalvir, km 4, Torrejón de Ardoz, 28850 Madrid, Spain; (P.R.-P.); (S.G.-M.); (E.M.-M.)
| | - María Colín-García
- Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City 04510, Mexico;
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Hortelano C, Ruiz-Bermejo M, de la Fuente JL. Solid-state polymerization of diaminomaleonitrile: Toward a new generation of conjugated functional materials. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123696] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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13
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Abstract
HCN-derived polymers are a heterogeneous group of complex substances synthesized from pure HCN; from its salts; from its oligomers, specifically its trimer and tetramer, amino-nalono-nitrile (AMN) and diamino-maleo-nitrile (DAMN), respectively; or from its hydrolysis products, such as formamide, under a wide range of experimental conditions. The characteristics and properties of HCN-derived polymers depend directly on the synthetic conditions used for their production and, by extension, their potential applications. These puzzling systems have been known mainly in the fields of prebiotic chemistry and in studies on the origins of life and astrobiology since the first prebiotic production of adenine by Oró in the early years of the 1960s. However, the first reference regarding their possible role in prebiotic chemistry was mentioned in the 19th century by Pflüger. Currently, HCN-derived polymers are considered keys in the formation of the first and primeval protometabolic and informational systems, and they may be among the most readily formed organic macromolecules in the solar system. In addition, HCN-derived polymers have attracted a growing interest in materials science due to their potential biomedical applications as coatings and adhesives; they have also been proposed as valuable models for multifunctional materials with emergent properties such as semi-conductivity, ferroelectricity, catalysis and photocatalysis, and heterogeneous organo-synthesis. However, the real structures and the formation pathways of these fascinating substances have not yet been fully elucidated; several models based on either computational approaches or spectroscopic and analytical techniques have endeavored to shed light on their complete nature. In this review, a comprehensive perspective of HCN-derived polymers is presented, taking into account all the aspects indicated above.
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