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Micheel M, Ahner J, Frey M, Neumann C, Hager MD, Dietzek B. Photophysics of a Bis-Furan-Functionalized 4,7-bis
(Phenylethynyl)-2,1,3-benzothiadiazole: A Building Block for Dynamic Polymers. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mathias Micheel
- Institute of Physical Chemistry; Friedrich Schiller University Jena; Helmholtzweg 4 07743 Jena Germany
- Leibniz Institute of Photonic Technology (IPHT) e.V.; Albert-Einstein-Straße 9 07745 Jena Germany
| | - Johannes Ahner
- Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstraße 10 07743 Jena Germany
| | - Martha Frey
- Institute of Physical Chemistry; Friedrich Schiller University Jena; Helmholtzweg 4 07743 Jena Germany
| | - Clara Neumann
- Institute of Physical Chemistry; Friedrich Schiller University Jena; Helmholtzweg 4 07743 Jena Germany
| | - Martin D. Hager
- Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstraße 10 07743 Jena Germany
| | - Benjamin Dietzek
- Institute of Physical Chemistry; Friedrich Schiller University Jena; Helmholtzweg 4 07743 Jena Germany
- Leibniz Institute of Photonic Technology (IPHT) e.V.; Albert-Einstein-Straße 9 07745 Jena Germany
- Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
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Burratti L, Casalboni M, De Matteis F, Pizzoferrato R, Prosposito P. Polystyrene Opals Responsive to Methanol Vapors. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1547. [PMID: 30154304 PMCID: PMC6165557 DOI: 10.3390/ma11091547] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 08/24/2018] [Accepted: 08/24/2018] [Indexed: 12/13/2022]
Abstract
Photonic crystals (PCs) show reflectance spectra depending on the geometrical structure of the crystal, the refractive index (neff), and the light incident angle, according to the Bragg-Snell law. Three-dimensional photonic crystals (3D-PCs) composed of polymeric sub-micrometer spheres, are arranged in an ordered face cubic centered (fcc) lattice and are good candidates for vapor sensing by exploiting changes of the reflectance spectra. We synthesized high quality polystyrene (PS) 3D-PCs, commonly called opals, with a filling factor f near to the ideal value of 0.74 and tested their optical response in the presence of different concentrations of methanol (MeOH) vapor. When methanol was present in the voids of the photonic crystals, the reflectance spectra experienced energy shifts. The concentration of methyl alcohol vapor can be inferred, due to a linear dependence of the reflectance band maximum wavelength as a function of the vapor concentration. We tested the reversibility of the process and the time stability of the system. A limit of detection (LOD) equal to 5% (v/v₀), where v was the volume of methanol and v₀ was the total volume of the solution (methanol and water), was estimated. A model related to capillary condensation for intermediate and high methanol concentrations was discussed. Moreover, a swelling process of the PS spheres was invoked to fully understand the unexpected energy shift found for very high methanol content.
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Affiliation(s)
- Luca Burratti
- Industrial Engineering Department, University of Rome "Tor Vergata", Via del Politecnico 1, 00133 Rome, Italy.
| | - Mauro Casalboni
- Industrial Engineering Department, University of Rome "Tor Vergata", Via del Politecnico 1, 00133 Rome, Italy.
- Centre of Regenerative Medicine, Centre of Regenerative Medicine of University of Rome "Tor Vergata", Via Montpellier 1, 00133 Rome, Italy.
- National Interuniversity Consortium of Materials Science and Technology (INSTM), University of Rome "Tor Vergata", 00133 Rome, Italy.
| | - Fabio De Matteis
- Industrial Engineering Department, University of Rome "Tor Vergata", Via del Politecnico 1, 00133 Rome, Italy.
- Centre of Regenerative Medicine, Centre of Regenerative Medicine of University of Rome "Tor Vergata", Via Montpellier 1, 00133 Rome, Italy.
- National Interuniversity Consortium of Materials Science and Technology (INSTM), University of Rome "Tor Vergata", 00133 Rome, Italy.
| | - Roberto Pizzoferrato
- Industrial Engineering Department, University of Rome "Tor Vergata", Via del Politecnico 1, 00133 Rome, Italy.
| | - Paolo Prosposito
- Industrial Engineering Department, University of Rome "Tor Vergata", Via del Politecnico 1, 00133 Rome, Italy.
- Centre of Regenerative Medicine, Centre of Regenerative Medicine of University of Rome "Tor Vergata", Via Montpellier 1, 00133 Rome, Italy.
- National Interuniversity Consortium of Materials Science and Technology (INSTM), University of Rome "Tor Vergata", 00133 Rome, Italy.
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Possanza F, Limosani F, Tagliatesta P, Zanoni R, Scarselli M, Ciotta E, Pizzoferrato R. Functionalization of Carbon Spheres with a Porphyrin-Ferrocene Dyad. Chemphyschem 2018; 19:2243-2249. [PMID: 29781239 DOI: 10.1002/cphc.201800277] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Indexed: 01/18/2023]
Abstract
Meso-tetraphenylporphyrin connected with a ferrocene molecule in the beta-position of the macrocycle through a triple carbon-carbon bond has been bound to carbon spheres using the Prato-Maggini reaction. The ethynyl or/and phenylene ethynylene subunits were chosen as a linking bridge to give a high conjugation degree between the donor (i. e., ferrocene), the photoactive compound (i. e., porphyrin), and the acceptor (i. e., carbon spheres). The molecular bridges have been directly linked to the beta-pyrrole positions of the porphyrin ring, generating a new example of a long-range donor-acceptor system. Steady-state fluorescence studies together with Raman and XPS measurements helped understanding the chemical and physical properties of the porphyrin ring in the new adduct. The spectroscopic characteristics were also compared with those obtained from a similar compound bearing fullerene instead of carbon spheres.
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Affiliation(s)
- Fabio Possanza
- Dipartimento di Chimica, Università degli Studi di Roma "Tor Vergata", Via della Ricerca Scientifica 1, 00133-, Rome, Italy
| | - Francesca Limosani
- Dipartimento di Chimica, Università degli Studi di Roma "Tor Vergata", Via della Ricerca Scientifica 1, 00133-, Rome, Italy
| | - Pietro Tagliatesta
- Dipartimento di Chimica, Università degli Studi di Roma "Tor Vergata", Via della Ricerca Scientifica 1, 00133-, Rome, Italy
| | - Robertino Zanoni
- Dipartimento di Chimica, Università degli Studi di Roma "La Sapienza", Piazzale Aldo Moro 5, 00185-, Rome, Italy
| | - Manuela Scarselli
- Dipartimento di Fisica, Università degli Studi di Roma "Tor Vergata", Via della Ricerca Scientifica 1, 00133-, Rome, Italy
| | - Erica Ciotta
- Dipartimento di Ingegneria Industriale, Università degli Studi di Roma "Tor Vergata", Via del Politecnico 1, 00133-, Rome, Italy
| | - Roberto Pizzoferrato
- Dipartimento di Ingegneria Industriale, Università degli Studi di Roma "Tor Vergata", Via del Politecnico 1, 00133-, Rome, Italy
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Discriminating between Different Heavy Metal Ions with Fullerene-Derived Nanoparticles. SENSORS 2018; 18:s18051496. [PMID: 29747464 PMCID: PMC5982591 DOI: 10.3390/s18051496] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/07/2018] [Accepted: 05/08/2018] [Indexed: 01/04/2023]
Abstract
A novel type of graphene-like nanoparticle, synthesized by oxidation and unfolding of C60 buckminsterfullerene fullerene, showed multiple and reproducible sensitivity to Cu2+, Pb2+, Cd2+, and As(III) through different degrees of fluorescence quenching or, in the case of Cd2+, through a remarkable fluorescence enhancement. Most importantly, only for Cu2+ and Pb2+, the fluorescence intensity variations came with distinct modifications of the optical absorption spectrum. Time-resolved fluorescence study confirmed that the common origin of these diverse behaviors lies in complexation of the metal ions by fullerene-derived carbon layers, even though further studies are required for a complete explanation of the involved processes. Nonetheless, the different response of fluorescence and optical absorbance towards distinct cationic species makes it possible to discriminate between the presence of Cu2+, Pb2+, Cd2+, and As(III), through two simple optical measurements. To this end, the use of a three-dimensional calibration plot is discussed. This property makes fullerene-derived nanoparticles a promising material in view of the implementation of a selective, colorimetric/fluorescent detection system.
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Inouye M, Abe H, Ohishi Y. A New Class of Structurally Simple and Highly Emissive Fluorophores with a Pyridine–Acetylene–Phenol Conjugate. HETEROCYCLES 2015. [DOI: 10.3987/com-14-s(k)51] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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New π-conjugated polymers containing oxazole in the main chain: Optical and electrochemical properties. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.02.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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