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Your search keyword '"Baptista, Rosa M. F."' showing total 3 results
Start Over Author "Baptista, Rosa M. F." Journal inorganic chemistry
3 results on '"Baptista, Rosa M. F."'

1. Exploring the emissive properties of new azacrown compounds bearing aryl, furyl, or thienyl moieties: a special case of chelation enhancement of fluorescence upon interaction with [Ca.sup.2+], [Cu.sup.2+], or [Ni.sup.2+]

Author

Oliveira, Elisabete, Baptista, Rosa M. F., Costa, Susana P. G., Raposo, M. Manuela M., and Lodeiro, Carlos

Subjects
Copper -- Chemical properties, Copper -- Optical properties, Fluorescence spectroscopy -- Usage, Imidazole -- Structure, Imidazole -- Chemical properties, Imidazole -- Optical properties, Organometallic compounds -- Structure, Organometallic compounds -- Chemical properties, Organometallic compounds -- Optical properties, Time-of-flight mass spectrometry -- Usage, X-rays -- Diffraction, X-rays -- Usage, Chemistry
Published
2010

2. Exploring the Emissive Properties of New Azacrown Compounds Bearing Aryl, Furyl, or Thienyl Moieties: A Special Case of Chelation Enhancement of Fluorescence upon Interaction with Ca2+, Cu2+, or Ni2+.

Author

Oliveira, Elisabete, Baptista, Rosa M. F., Costa, Susana P. G., Raposo, M. Manuela M., and Lodeiro, Carlos

Subjects
*MOIETIES (Chemistry), *CHELATION therapy, *FLUORESCENCE, *ETHER (Anesthetic), *EMISSION spectroscopy, *X-ray diffraction
Abstract

Three new compounds bearing furyl, aryl, or thienyl moieties linked to an imidazo-crown ether system (1, 2, and 3) were synthesized and fully characterized by elemental analysis, infrared, UV—vis absorption, and emission spectroscopy, X-ray crystal diffraction, and MALDI-TOF-MS spectrometry. The interaction toward metal ions (Ca2+, Cu2+, Ni2+, and Hg2+) and F- has been explored in solution by absorption and fluorescence spectroscopy. Mononuclear and binuclear metal complexes using Cu2+ or Hg2+ as metal centers have been synthesized and characterized. Compounds 2 and 3 show a noticeable enhancement of the fluorescence intensity in the presence of Ca2+ and Cu2+ ions. Moreover compound 3 presents a dual sensory detection way by modification of the fluorimetric and colorimetric properties in the presence of Cu2+ or Hg2+. EPR studies in frozen solution and in microcrystalline state of the dinuclear Cu(II)3 complex revealed the presence of an unique Cu2+ type. [ABSTRACT FROM AUTHOR]

Published
2010
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