Staff directory
Claudio Roscini
Senior Researcher
claudio.roscini(ELIMINAR)@icn2.cat
Nanostructured Functional Materials
- ORCID: 0000-0002-0157-8934
Publications
2017
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Photochromism of dihydroazulene-based polymeric thin films
Torres-Pierna H., Roscini C., Vlasceanu A., Broman S.L., Jevric M., Cacciarini M., Nielsen M.B. Dyes and Pigments; 145: 359 - 364. 2017. 10.1016/j.dyepig.2017.06.015. IF: 3.473
We report on the preparation of polymeric thin films doped with six dihydroazulene derivatives whose photochromic properties were previously screened in organic solution studies. Spectroscopic investigations into the photochromic behavior of the polymeric matrices have given important insights on the stability and the photophysical properties of the photoswitches impregnated into polymers. © 2017 Elsevier Ltd
2016
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Switchable colloids, thin-films and interphases based on metal complexes with non-innocent ligands: The case of valence tautomerism and their applications
Vázquez-Mera N.A., Novio F., Roscini C., Bellacanzone C., Guardingo M., Hernando J., Ruiz-Molina D. Journal of Materials Chemistry C; 4 (25): 5879 - 5889. 2016. 10.1039/c6tc00038j. IF: 5.066
Successful nanostructuration approaches developed in the last few years have allowed the preparation of robust valence tautomeric (VT) switchable (micro-/nano-) structures of a variety of dimensions and morphologies. These results are expected to definitely foster the implementation of these materials on hybrid molecular electronic devices but also endorse new applications in other different fields such as sensing, drug delivery or water remediation, among others. © The Royal Society of Chemistry 2016.
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Temperature-Controlled Switchable Photochromism in Solid Materials
Julià-López A., Hernando J., Ruiz-Molina D., González-Monje P., Sedó J., Roscini C. Angewandte Chemie - International Edition; 55 (48): 15044 - 15048. 2016. 10.1002/anie.201608408. IF: 11.709
A novel strategy to achieve thermally switchable photochromism in solid materials is reported, which relies on the preparation of polymeric core–shell capsules containing solutions of photochromic dyes in acidic phase-change materials. Upon changing the phase (solid or liquid) of the encapsulated medium, one of the two photochromic states of the system is selectively stabilized on demand, allowing for reversible interconversion between direct and reverse photochromism when thermally scanning through the melting temperature of the phase-change material. This strategy, which does not require the addition of external agents or chemical modification of the dyes, proved to be general for different spiropyran photochromes and to be applicable to the fabrication of a variety of functional materials by simply embedding the capsules obtained into a solid matrix of choice. © 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
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Thermally Switchable Molecular Upconversion Emission
Massaro G., Hernando J., Ruiz-Molina D., Roscini C., Latterini L. Chemistry of Materials; 28 (3): 738 - 745. 2016. 10.1021/acs.chemmater.5b03532. IF: 9.407
In this work a novel strategy is introduced to achieve thermally switchable emission from photon upconversion (UC) systems based on organic dyes. When these molecules were dissolved at low concentrations in phase-change media, a reversible, sharp, and nearly complete interconversion from blue upconverted emission to red luminescence was observed around the solid-to-liquid transition of the system. This result was rationalized in terms of dye aggregation, which selectively occurs in the solid state and dramatically enhances the inter-chromophoric energy transfer processes leading to UC. Notably, this behavior is extendable to different media and dyes, which allows an easy tuning of the switching temperature and emission colors. In addition, with proper selection of the phase-change medium, our strategy permits facile preparation of solid molecular materials showing photon UC at room temperature and even at sub-micromolar dye concentrations. © 2016 American Chemical Society.
2015
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Liquid-Filled Valence Tautomeric Microcapsules: A Solid Material with Solution-Like Behavior
Vázquez-Mera N.A., Roscini C., Hernando J., Ruiz-Molina D. Advanced Functional Materials; 25 (26): 4129 - 4134. 2015. 10.1002/adfm.201501166. IF: 11.805
The integration of stimuli-responsive valence tautomeric (VT) molecular systems into solid materials without compromising their functionality is a major bottleneck for the use of these compounds in high-added value applications. In this work, an innovative, simple, and universal approach is described to tackle this challenge based on the confinement of the active species into liquid-filled polymeric capsules. A microstructured solid with optimized solution-like behavior is obtained in this way, whose VT properties can be rationally tuned upon variation of the encapsulated solvent. Incorporation of the resulting capsules into thin films or other matrices of interest allows successful transfer of valence tautomerism from the liquid phase to solid materials, thus paving the way to the fabrication of functional devices based on spin transition compounds. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
2014
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Bio- and Bioinspired Nanomaterials
Ruiz-Molina D., Novio F., Roscini C. Bio- and Bioinspired Nanomaterials; 9783527335817: 1 - 457. 2014. 10.1002/9783527675821.
A comprehensive overview of nanomaterials that are inspired by or targeted at biology, including some of the latest breakthrough research. Throughout, valuable contributions from top-level scientists illustrate how bionanomaterials could lead to novel devices or structures with unique properties. The first and second part cover the most relevant synthetic and bioinspired nanomaterials, including surfaces with extreme wettability properties, functional materials with improved adhesion or structural and functional systems based on the complex and hierarchical organization of natural composites. These lessons from nature are explored in the last section where bioinspired materials are proposed for biomedical applications, showing their potential for future applications in drug delivery, theragnosis, and regenerative medicine. A navigational guide aimed at advanced and specialist readers, while equally relevant for readers in research, academia or private companies focused on high added-value contributions. Young researchers will also find this an indispensable guide in choosing or continuing to work in this stimulating area, which involves a wide range of disciplines, including chemistry, physics, materials science and engineering, biology, and medicine. © 2015 Wiley-VCH Verlag GmbH & Co. KGaA. All rights reserved.