A Comparative Study on HCN Polymers Synthesized by Polymerization of NH 4 CN or Diaminomaleonitrile in Aqueous Media: New Perspectives for Prebiotic Chemistry and Materials Science.

Autor: Ruiz-Bermejo M; Departamento de Evolución Molecular, Centro de Astrobiología (CSIC-INTA), Ctra. Torrejón-Ajalvir, km 4, 28850, Torrejón de Ardoz, Madrid, Spain., de la Fuente JL; Instituto Nacional de Técnica Aeroespacial 'Esteban Terradas' (INTA), Ctra. Torrejón-Ajalvir, km 4, 28850, Torrejón de Ardoz, Madrid, Spain., Carretero-González J; Instituto de CienciayTecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, 28006, Madrid, Spain., García-Fernández L; Instituto de CienciayTecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, 28006, Madrid, Spain.; Networking Biomedical Research Centre in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029, Madrid, Spain., Aguilar MR; Instituto de CienciayTecnología de Polímeros (ICTP-CSIC), C/ Juan de la Cierva 3, 28006, Madrid, Spain.; Networking Biomedical Research Centre in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, 28029, Madrid, Spain.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2019 Sep 02; Vol. 25 (49), pp. 11437-11455. Date of Electronic Publication: 2019 Aug 02.
DOI: 10.1002/chem.201901911
Abstrakt: HCN polymers are a group of complex and heterogeneous substances that are widely known in the fields of astrobiology and prebiotic chemistry. In addition, they have recently received considerable attention as potential functional material coatings. However, the real nature and pathways of formation of HCN polymers remain open questions. It is well established that the tuning of macromolecular structures determines the properties and practical applications of a polymeric material. Herein, different synthetic conditions were explored for the production of HCN polymers from NH 4 CN or diaminomaleonitrile in aqueous media with different concentrations of the starting reactants and several reaction times. By using a systematic methodology, both series of polymers were shown to exhibit similar, but not identical, spectroscopic and thermal fingerprints, which resulted in a clear differentiation of their morphological and electrochemical properties. New macrostructures are proposed for HCN polymers, and promising insights are discussed for prebiotic chemistry and materials science on the basis of the experimental results.
(© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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