Zobrazeno 1 - 10 of 45 pro vyhledávání: '"Newton M, Barbosa Neto"'
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Environmental effects, intertube interactions and σ-π bond re-hybridization in bundles of double- and triple-walled carbon nanotubes
Autor: Yoong Ahm Kim, Jia-Wern Hue, Thomas Ch. Hirschmann, Newton M. Barbosa Neto, Paulo T. Araujo, Hiroyuki Muramatsu
Publikováno v: Carbon. 158:651-661
In the literature, fine structuring and mixing of the radial breathing mode frequencies ( ω RBM ) due to intertube interactions ( Ω int ) for specific inner tubes in free-standing isolated double-walled nanotubes (DWNTs) have been addressed. Questi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5854de4b7596bc85c290fd7661b8fe18
https://doi.org/10.1016/j.carbon.2019.11.037
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3
Akademický článek
Synthesis and Spectroscopic Characterization of Two Tetrasubstituted Cationic Porphyrin Derivatives
Autor: Newton M. Barbosa Neto, José A.S. Cavaleiro, Antonio E.H. Machado, Rodrigo De Paula, Diesley M.S. Araújo, Hércules S. Miglio, Leonardo T. Ueno, Weverson R. Gomes
Publikováno v: Molecules, Vol 16, Iss 7, Pp 5807-5821 (2011)
An imidazolium tetrasubstituted cationic porphyrin derivative (the free base and its Zn(II) complex) with five-membered heterocyclic groups in the meso-positions were synthesized using microwave irradiation, and the compounds obtained characterized b
Externí odkaz: https://doaj.org/article/20510bea5c4542c0bb24a3675ce4b235
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6
Thermodynamics of Linear Carbon Chains
Autor: Paulo T. Araujo, Go Bong Choi, Alexandre Rocha Paschoal, Yoong Ahm Kim, Keshav Sharma, Morinobu Endo, Newton M. Barbosa Neto, Nathalia Leal Marinho Costa
Publikováno v: Physical Review Letters. 126
Linear carbon chains (LCCs) are one-dimensional materials with unique properties, including high Debye temperatures and restricted selection rules for phonon interactions. Consequently, their Raman C-band frequency's temperature dependence is a probe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f041be307bd38fe5aad424eaad740f37
https://doi.org/10.1103/physrevlett.126.125901
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7
Anharmonicity and Universal Response of Linear Carbon Chain Mechanical Properties under Hydrostatic Pressure
Autor: Paulo T. Araujo, Newton M. Barbosa Neto, Alexandre Rocha Paschoal, Keshav Sharma, Nathalia Leal Marinho Costa, Hiroyuki Muramatsu, Yoong Ahm Kim, Jing Kong, Luiz Gustavo Pimenta Martins
Publikováno v: Physical review letters. 125(10)
Isolated linear carbon chains (LCCs) encapsulated by multiwalled carbon nanotubes are studied under hydrostatic pressure ($P$) via resonance Raman scattering. The LCCs' spectroscopic signature C band around $1850\text{ }\text{ }{\mathrm{cm}}^{\ensure
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b22d6fd159a532a9167dd640baf654aa
https://pubmed.ncbi.nlm.nih.gov/35687449
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8
Selective Inner-Filter on the Fluorescence Response of Chlorophyll and Pheophytin Molecules Extracted from Caesalpinia echinata Leaves
Autor: J.M.S. Lopes, Sanclayton G. C. Moreira, Newton M. Barbosa Neto
Publikováno v: Journal of the Brazilian Chemical Society v.31 n.1 2020
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 31, Issue: 1, Pages: 162-169, Published: 10 JAN 2020
Photophysical processes in multicomponent solutions composed by natural pigments, extracted from Caesalpinia echinata (Brazil-wood) leaves, are investigated. Beacuse of the main fluorescent molecules in these solutions are the chlorophyll a, chloroph
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f62b9410721a1f94935d359b3333a88a
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532020000100162
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9
Effects of meso-tetrakis (4-sulfonatophenyl) porphyrin (TPPS4) aggregation on its spectral and kinetic characteristics and singlet oxygen production
Autor: Leonardo De Boni, Marcio Adriano Rodrigues Souza, G. G. Parra, Iouri Borissevitch, Cleber Renato Mendonça, Daniel S. Correa, Lino Misoguti, Luciane Madureira Almeida, Eli Silveira-Alves, Pablo José Gonçalves, Sérgio Carlos Zílio, Newton M. Barbosa Neto
Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
The present work reports the effects of meso-tetrakis (4-sulfonatophenyl) porphyrin (TPPS4) aggregation on its excited states absorption spectra, triplet states quenching by molecular oxygen and singlet oxygen production. Experimental techniques such
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54cbf13cbc56c6af6d6630cc58ba4ed1
https://doi.org/10.1016/j.saa.2021.120063
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10
Remarkable Electronic Effect on the meso-Tetra(thienyl)porphyrins
Autor: Luis R. Dinelli, Pamela S de Vargas, Carolina Donatoni, Taíse H O Leite, Beatriz N. Cunha, Alzir A. Batista, Kleber T. de Oliveira, Otaciro R. Nascimento, Newton M. Barbosa Neto, Gregory Grawe, J.M.S. Lopes, W. C. Moreira, João Honorato
Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Complexes derived from meso-tetra(thienyl)porphyrins (TThP) and meso-tetra(pyridyl)porphyrin (TPyP) containing peripheral ruthenium complexes with general formulas {TPyP[RuCl(dppb)(5,5'-Mebipy)]4}(PF6)4, {TThP[RuCl(dppb)(5,5'-Mebipy)]4}(PF6)4, and {T
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b40b739d9ddaeff6f986b35af30b0223
https://pubmed.ncbi.nlm.nih.gov/30605327
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