Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Alexandre Bergantini"'
Autor:
Jia Wang, Andrew M. Turner, Joshua H. Marks, Chaojiang Zhang, N. Fabian Kleimeier, Alexandre Bergantini, Santosh K. Singh, Ryan C. Fortenberry, Ralf I. Kaiser
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 79 (2024)
Enols—tautomers of ketones or aldehydes—are considered key intermediates in the formation of prebiotic sugars and sugar acids. Although laboratory simulation experiments suggest that enols should be ubiquitous in the interstellar medium, the unde
Externí odkaz:
https://doaj.org/article/0d4171531df7448a9f20968573c5c836
Autor:
Caroline Antunes Rosa, Alexandre Bergantini, Péter Herczku, Duncan V. Mifsud, Gergő Lakatos, Sándor T. S. Kovács, Béla Sulik, Zoltán Juhász, Sergio Ioppolo, Heidy M. Quitián-Lara, Nigel J. Mason, Claudia Lage
Publikováno v:
Life, Vol 13, Iss 11, p 2208 (2023)
The purine nucleobases adenine and guanine are complex organic molecules that are essential for life. Despite their ubiquitous presence on Earth, purines have yet to be detected in observations of astronomical environments. This work therefore propos
Externí odkaz:
https://doaj.org/article/d1b6439ca071405a8bbf300113bd984a
Autor:
Santosh K. Singh, Alexandre Bergantini, Cheng Zhu, Marco Ferrari, Maria Cristina De Sanctis, Simone De Angelis, Ralf I. Kaiser
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
The authors here propose a chemical reaction that forms ammoniated phyllosilicates on Ceres. This process could trigger at a very low temperature, suggesting Ceres evolution in a region different from its current location.
Externí odkaz:
https://doaj.org/article/c51b2eb1a3d246a98bd51007b981c0e1
Autor:
Andrew M. Turner, Alexandre Bergantini, Matthew J. Abplanalp, Cheng Zhu, Sándor Góbi, Bing-Jian Sun, Kang-Heng Chao, Agnes H. H. Chang, Cornelia Meinert, Ralf I. Kaiser
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-9 (2018)
Extraterrestrial sources may have provided prebiotic phosphorus to the early Earth. Here, the authors investigate the potential of phosphine-doped astrochemical analog ices to form phosphorus oxoacids as precursors to more complex prebiotic compounds
Externí odkaz:
https://doaj.org/article/856963b4a6704513831b72e9f60dbdfa
Autor:
Alexandre Bergantini, Ana Lucia Ferreira de Barros, Naomi Nitahara Toribio, Hermann Rothard, Philippe Boduch, Enio Frota da Silveira
Publikováno v:
Journal of Physical Chemistry A
Journal of Physical Chemistry A, 2022, 126 (12), pp.2007-2017. ⟨10.1021/acs.jpca.2c00768⟩
Journal of Physical Chemistry A, 2022, 126 (12), pp.2007-2017. ⟨10.1021/acs.jpca.2c00768⟩
International audience; As of early 2022, only six species bearing an N−Obond have been detected toward cold molecular clouds and regionsof star formation. It is not clear yet if the small number of N−Obond species found in the interstellar mediu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df934943aabbc55577c46bd0fafeed6c
https://doi.org/10.1021/acs.jpca.2c00768
https://doi.org/10.1021/acs.jpca.2c00768
Autor:
Peter R. Schreiner, Alexandre Bergantini, Santosh K. Singh, Cheng Zhu, Ya-Syuan Huang, Bing-Jian Sun, André K. Eckhardt, Agnes H. H. Chang, Ralf I. Kaiser
Publikováno v:
Chemical Communications. 57:4958-4961
We present the first formation of the previously elusive phosphine imide (HNPH3) along with its phosphinous amide (H2N–PH2) isomer via exposure of phosphine (PH3) and ammonia (NH3) ices to ionizing radiation. Our approach may be extended to prepare
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de19078b0020101df5a6803229ec0901
https://doi.org/10.1039/d0cc08411e
https://doi.org/10.1039/d0cc08411e
Autor:
Ralf I. Kaiser, Peter R. Schreiner, Alexandre Bergantini, André K. Eckhardt, Santosh K. Singh
Publikováno v:
Angewandte Chemie International Edition. 58:5663-5667
With nearly 200 molecules detected in interstellar and circumstellar environments, the identification of the biologically relevant α-keto carboxylic acid, glyoxylic acid (HCOCOOH), is still elusive. Herein, the formation of glyoxylic acid via cosmic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a3db1a5b191c57a75978277f3ea5355
https://doi.org/10.1002/anie.201901059
https://doi.org/10.1002/anie.201901059
Autor:
Cheng, Zhu, Alexandre, Bergantini, Santosh K, Singh, Ralf I, Kaiser, André K, Eckhardt, Peter R, Schreiner, Ya-Syuan, Huang, Bing-Jian, Sun, Agnes H H, Chang
Publikováno v:
Chemical communications (Cambridge, England). 57(40)
We present the first formation of the previously elusive phosphine imide (HN[double bond, length as m-dash]PH3) along with its phosphinous amide (H2N-PH2) isomer via exposure of phosphine (PH3) and ammonia (NH3) ices to ionizing radiation. Our approa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::85b9589344c3a2b0fc41c535b3ccbf99
https://pubmed.ncbi.nlm.nih.gov/33876063
https://pubmed.ncbi.nlm.nih.gov/33876063
Autor:
Cheng Zhu, Simone De Angelis, Ralf I. Kaiser, M. Ferrari, Maria Cristina De Sanctis, Alexandre Bergantini, Santosh K. Singh
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
The surface mineralogy of dwarf planet Ceres is rich in ammonium (NH4+) bearing phyllosilicates. However, the origin and formation mechanisms of ammoniated phyllosilicates on Ceres’s surface are still elusive. Here we report on laboratory simulatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af5e48d87db1674ce5fbc5d9b5fcb013
https://pubmed.ncbi.nlm.nih.gov/33976207
https://pubmed.ncbi.nlm.nih.gov/33976207
Autor:
Cheng, Zhu, André K, Eckhardt, Alexandre, Bergantini, Santosh K, Singh, Peter R, Schreiner, Ralf I, Kaiser
Publikováno v:
Science Advances
Cyclotriphosphazene (P3N3) and its Dewar benzene–type isomer were identified on the basis of their photochemical properties.
Although the chemistry of phosphorus and nitrogen has fascinated chemists for more than 350 years, the Hückel aromati
Although the chemistry of phosphorus and nitrogen has fascinated chemists for more than 350 years, the Hückel aromati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::675fe0e6effde88bd5223a02a2fbd74b
https://pubmed.ncbi.nlm.nih.gov/32832667
https://pubmed.ncbi.nlm.nih.gov/32832667