Elena Cariati

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This contribution details the synthesis and chemical/physical characterization of a series of unconventional twisted pi-electron system electro-optic (EO) chromophores. Crystallographic analysis of these chromophores reveals large ring-ring dihedral twist angles (80-89 degrees) and a highly charge-separated zwitterionic structure dominating the ground(More)
For fluorescent compounds, the combined use of absorption and emission solvatochromic data allows to estimate indirectly the cavity radius of the molecule in solution, a very critical parameter in the application of the solvatochromic method for the determination of the quadratic hyperpolarizability beta of dipolar molecules. For two test compounds,(More)
Yiliang Wang,‡ David L. Frattarelli,‡ Antonio Facchetti,‡ Elena Cariati,*,§ Elisa Tordin,§ Renato Ugo,§ Cristiano Zuccaccia,| Alceo Macchioni,*,| Staci L. Wegener,‡ Charlotte L. Stern,‡ Mark A. Ratner,*,‡ and Tobin J. Marks*,‡ Department of Chemistry and the Materials Research Center, Northwestern UniVersity, 2145 Sheridan Road, EVanston, Illinois(More)
Molecule-based electrooptic (EO) materials are of intense research interest for understanding how light interacts with matter and for applications in photonic technologies such as high-speed optical communications, integrated optics, and optical data processing and storage. In such materials, the second-order susceptibility tensor governing EO response(More)
Diphenyl-(4-{2-[4-(2-pyridin-4-yl-vinyl)-phenyl]-vinyl}-phenyl)-amine (DPVPA) constitutes a novel acido-triggered reversible luminescent and nonlinear optical switch. Remarkably, for the first time the Electric-Field Induced Second Harmonic generation (EFISH) technique is used to reveal a protonation-deprotonation NLO contrast.
Copper(II) bisimidazolate affords five different polymorphs; of these, one was structurally characterized 40 years ago by standard single-crystal X-ray diffraction (Jarvis, J. A. J.; Wells, A. F. Acta Crystallogr. 1960, 13, 1027), while the remaining four, selectively prepared as pure polycrystalline phases, have been now studied by X-ray powder diffraction(More)
ISMAC-CNR, via Bassini 15, 20133 Milan, Fax: +39 02 7063 6400; Tel: +39 02 2369 9 Dept. Chemistry and INSTM UdR Milano, U Milan, Italy. E-mail: elena.cariati@unimi.it; 4370 NFMLab, DCMIC, Politecnico di Milano, via pierangelo.metrangolo@polimi.it; giuseppe 3180; Tel: +39 02 2399 3041; +39 02 2399 ISTM-CNR, University of Milan, via Go(More)
Mixed M(II)/M(III) metal oxalates, as "stripes" connected through strong hydrogen bonding by para-dimethylaminobenzaldeide (DAMBA) and water, form an organic-inorganic 2D network that enables segregation in layers of the cationic organic NLO-phore trans-4-(4-dimethylaminostyryl)-1-methylpyridinium, [DAMS+]. The crystalline hybrid materials obtained have the(More)