Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Joaquim Marçalo"'
Publikováno v:
Applied Sciences, Vol 13, Iss 6, p 3834 (2023)
Gas-phase experiments, using electrospray ionization quadrupole ion trap mass spectrometry (ESI-QIT/MS), were conducted to probe basic interactions of the uranyl(VI) ion, UO22+, with selected natural amino acids, namely, L-cysteine (Cys), L-histidine
Externí odkaz:
https://doaj.org/article/eee3c4fb9ea54c7ca164bb99e0dfb98b
Autor:
Leonor Maria, Joaquim Marçalo
Publikováno v:
Inorganics, Vol 10, Iss 8, p 121 (2022)
Uranyl ions, {UO2}n+ (n = 1, 2), display trans, strongly covalent, and chemically robust U-O multiple bonds, where 6d, 5f, and 6p orbitals play important roles. The synthesis of isoelectronic analogues of uranyl has been of interest for quite some ti
Externí odkaz:
https://doaj.org/article/def91cca77ac407296b5f3b7944a2be3
Autor:
Nuno A. G. Bandeira, Joaquim Marçalo
Publikováno v:
Physical Chemistry Chemical Physics. 25:14084-14088
The decomposition of noble gas tetroxides and associated formal oxidation states. Studying the energetics of tetroxides through quantum chemistry provides new insight into noble gas properties.
Autor:
Sandrina Oliveira, Nuno A. G. Bandeira, João P. Leal, Leonor Maria, José M. Carretas, Bernardo Monteiro, Joaquim Marçalo
Publikováno v:
Physical Chemistry Chemical Physics. 24:14631-14639
Gas-phase reaction of Kr+ with SF6, examined by FTICR mass spectrometry, gave rise to the new species [KrSF5]+, whereas a Xe analogue was not observed. Ab initio computational studies established [KrSF5]+ as a weakly bound complex.
Autor:
Leonor Maria, Nuno A. G. Bandeira, Joaquim Marçalo, Isabel C. Santos, Ana S. D. Ferreira, José R. Ascenso
Publikováno v:
Inorganic Chemistry. 61:346-356
Autor:
Maria I. L. Soares, Clara S. B. Gomes, M. Conceição Oliveira, Teresa M. V. D. Pinho e Melo, Joaquim Marçalo
Publikováno v:
Organic & Biomolecular Chemistry. 19:9711-9722
The DABCO-catalyzed [3 + 3] annulation between 3-nitro-2H-chromenes and benzyl 2,3-butadienoate has been developed as a route to 5H-chromeno[3,4-b]pyridine derivatives. Under optimal reaction conditions, 5H-chromeno[3,4-b]pyridines incorporating two
Publikováno v:
Chemical Communications. 56:431-434
Uranium(vi) trans-bis(imido) complexes [U(κ4-{(tBu2ArO)2Me2-cyclam})(NPh)(NPhR)] react with CO2 to eliminate phenyl isocyanates and afford uranium(vi) trans-[O[double bond, length as m-dash]U[double bond, length as m-dash]NR]2+ complexes, including
Autor:
Maria I L, Soares, Clara S B, Gomes, M Conceição, Oliveira, Joaquim, Marçalo, Teresa M V D, Pinho E Melo
Publikováno v:
Organicbiomolecular chemistry. 19(44)
The DABCO-catalyzed [3 + 3] annulation between 3-nitro-2
Autor:
Bernardo Monteiro, Célia Lourenço, John K. Gibson, Joaquim Marçalo, Ana F. Lucena, Nuno A. G. Bandeira, José M. Carretas
Publikováno v:
Chemical communications (Cambridge, England). 55(94)
The diverse gas-phase reactivity of [LnO2(NO3)2]− complexes with water (Ln = Ce, Pr, Nd), examined in a quadrupole ion trap and complemented by ab initio computations, illuminates the chemical stability of Pr in the unusual +5 oxidation state.
Autor:
Mingfei Zhou, Junwei Lucas Bao, Wan-Lu Li, Joaquim Marçalo, Donald G. Truhlar, Jun Li, Jun-Bo Lu, Sebastian Riedel, John K. Gibson, W. H. Eugen Schwarz, Haoyu S. Yu, Shu-Xian Hu
Publikováno v:
Angewandte Chemie. 130:3297-3300