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Your search keyword '"Castiglioni, Ettore"' showing total 4 results
Start Over Author "Castiglioni, Ettore" Publisher royal society of chemistry
4 results on '"Castiglioni, Ettore"'

1. Stapled helical o-OPE foldamers as new circularly polarized luminescence emitters based on carbophilic interactions with Ag(i)-sensitivity† †We dedicate this work to Ettore Castiglioni who, with his high experience in the field of chiroptical spectroscopies, gave important contributions also to the development of CPL instrumentation. ‡ ‡Electronic supplementary information (ESI) available: general experimental details, synthesis of all new substrates and complexes, 1H and 13C NMR spectra of the new compounds and the corresponding NMR titrations, photophysical and theoretical data. CCDC 1443131. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c6sc01808d

Author

Morcillo, Sara P., Miguel, Delia, Álvarez de Cienfuegos, Luis, Justicia, José, Abbate, Sergio, Castiglioni, Ettore, Bour, Christophe, Ribagorda, María, Cárdenas, Diego J., Paredes, José Manuel, Crovetto, Luis, Choquesillo-Lazarte, Duane, Mota, Antonio J., Carreño, M. Carmen, Longhi, Giovanna, and Cuerva, Juan M.

Subjects
Chemistry
Abstract

Chiral stapled o-OPEs show excellent circular polarized luminescence responses (glum of 1.1 × 10–2) which can be modulated by carbophilic interactions., ortho-Oligo(phenylene)ethynylenes (o-OPEs) stapled with enantiopure 2,3-dihydroxybutane diethers have highly intense circular dichroism (CD) spectra and excellent circular polarized luminescence (CPL) responses (glum values up to 1.1 × 10–2), which are consistent with homochiral helically folded structures. In the presence of Ag(i), a change in the CPL emission is observed, representing the first example of CPL active small organic molecular emitters, which can be modulated by carbophilic interactions in a reversible manner.

Published
2016

2. Circularly polarized luminescence under near-UV excitation and structural elucidation of a Eu complex.

Author

Zinna, Francesco, Resta, Claudio, Abbate, Sergio, Castiglioni, Ettore, Longhi, Giovanna, Mineo, Placido, and Di Bari, Lorenzo

Subjects
CHIRALITY, LIGANDS (Chemistry), RARE earth metals, LUMINESCENCE, PARAMAGNETIC materials
Abstract

A new chiral diketonate ligand based on carvone binds early lanthanides. The Eu complex displays high circularly polarized (glum = 0.82) red luminescence under near-UV excitation in the solid state. This is the first report on such CPL activity in the solid state with a rigorous protocol to exclude artifacts. Paramagnetic NMR spectroscopy revealed the nature and structure of the active species. [ABSTRACT FROM AUTHOR]

Published
2015
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3. On the handedness of helical aggregates of C3 tricarboxamides: a multichiroptical characterization.

Author

Nieto-Ortega, Belén, García, Fátima, Longhi, Giovanna, Castiglioni, Ettore, Calbo, Joaquín, Abbate, Sergio, López Navarrete, Juan T., Ramírez, Francisco J., Ortí, Enrique, Sánchez, Luis, and Casado, Juan

Subjects
SUPRAMOLECULAR polymers, CARBOXAMIDES, CHARGE-charge interactions, MECHANICAL properties of polymers, MOLECULAR self-assembly
Abstract

A complete chiroptical characterization of the supramolecular polymers formed by tricarboxamides (S)-1 and (R)-1 is performed using ECD, VCD and CPL dichroic techniques. The helical aggregates show an intense CPL signal and their absolute P- or M-configuration is assigned with the help of theoretical calculations. [ABSTRACT FROM AUTHOR]

Published
2015
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4. On the handedness of helical aggregates of C3 tricarboxamides: a multichiroptical characterization.

Author

Nieto-Ortega B, García F, Longhi G, Castiglioni E, Calbo J, Abbate S, López Navarrete JT, Ramírez FJ, Ortí E, Sánchez L, and Casado J

Subjects
Stereoisomerism, Amides chemistry, Polymers chemistry
Abstract

A complete chiroptical characterization of the supramolecular polymers formed by tricarboxamides and is performed using ECD, VCD and CPL dichroic techniques. The helical aggregates show an intense CPL signal and their absolute P- or M-configuration is assigned with the help of theoretical calculations.

Published
2015
Full Text
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