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1. An artificial antenna complex containing four Ru(bpy)₃²⁺-type chromophores as light-harvesting components and a Ru(bpy)(CN)₄²⁻ subunit as the energy trap. A structural motif which resembles the natural photosynthetic systems

Author:
Quici, Silvio,   et al.   ; Loiseau, Frédérique; Marzanni, Giovanni; Indelli, Maria Teresa; Campagna., Sebastiano;     Show all 5 Authors
Source:
Chemical communications 2003 no.2 pp. 286-287
ISSN:
1364-548X
Subject:
chemical reactions; hydrogen bonding; light harvesting complex; photosynthesis; ruthenium; traps
Abstract:
... A cyclam subunit bearing four light-harvesting Ru(bpy)₃²⁺-type species is connected to a Ru(ii) compound having low-lying excited states (energy trap) by hydrogen bonding: the light absorbed by the light-harvesting elements is funnelled to the energy trap with high efficiency. ...
DOI:
10.1039/b211122e

2. Two-color luminescence from a tetranuclear Ir(iii)/Ru(ii) complex

Author:
Quici, Silvio,   et al.   ; Cavazzini, Marco; Pastorelli, Paola; Loiseau, Frédérique; Campagna, Sebastiano;     Show all 5 Authors
Source:
Chemical communications 2005 no.42 pp. 5266-5268
ISSN:
1364-548X
Subject:
ambient temperature; chemical reactions; emissions; energy transfer; iridium; luminescence; ruthenium
Abstract:
... A new tetranuclear compound containing Ru(ii) and Ir(iii) polypyridine subunits exhibits two independent emissions at room temperature, as a consequence of weak interchromophoric coupling; in contrast, at 77 K energy transfer from Ir-based chromophores to the Ru-based ones is quantitative. ...
DOI:
10.1039/b508063k

3. Rapid time-resolved fluoroimmunoassay for diethylstilbestrol in cow milk samples with a highly luminescent Tb³⁺ chelate

Author:
Quici, Silvio,   et al.   ; Secundo, Francesco; Bacigalupo, Maria A.; Scalera, Chiara;     Show all 4 Authors
Source:
Subtropical plant science 2012 v.25 no.2 pp. 221-225
ISSN:
0889-1575
Subject:
acids; aqueous solutions; dairy farming; diethylstilbestrol; estrogenic properties; goats; growth promotion; immunoassays; immunoglobulin G; livestock breeding; milk; mothers; polyclonal antibodies; pregnancy; rabbits; raw milk; risk; women
Abstract:
... Diethylstilbestrol (DES) is a non-steroidal synthetic molecule with estrogenic activity that provokes increased health risk in women whose mothers were given DES during pregnancy. In spite of this, it is sometimes illegally used as growth promoter in livestock breeding. Therefore methods that make it possible to monitor the presence of DES in food or in the environment might be of great interest. ...
DOI:
10.1016/j.jfca.2011.09.003

4. Efficient Greenish Blue Electrochemiluminescence from Fluorene and Spirobifluorene Derivatives

Author:
Quici, Silvio,   et al.   ; Polo, Federico; Rizzo, Fabio; Veiga-Gutierrez, Manoel; De Cola, Luisa;     Show all 5 Authors
Source:
Journal of the American Chemical Society 2012 v.134 no.37 pp. 15402-15409
ISSN:
1520-5126
Subject:
electrochemiluminescence; electrochemistry; emissions; energy; fluorenes; ions; photoluminescence; spectroscopy
Abstract:
... The spectroscopic and electrochemical behavior as well as electrogenerated chemiluminescence (ECL) of a series of donor−π–donor derivatives bearing triphenylamine groups as donor connected to a fluorene, 2,7-bis-(4-(N,N-diphenylamino)phen-1-yl)-9,9′-dimethylfluorene (1), or spirobifluorene core, 2,7-bis-(4-(N,N-diphenylamino)phen-1-yl)-9,9′-spirobifluorene (2) and 2,2′,7,7′-tetrakis(4-(N,N-dipheny ...
DOI:
10.1021/ja3054018

5. Intimately bound coumarin and bis(alkylaminostyryl)benzene fragments: synthesis and energy transfer

Author:
Quici, Silvio,   et al.   ; Cavazzini, Marco; Orlandi, Simonetta; Sissa, Cristina; Terenziani, Francesca; Painelli, Anna;     Show all 6 Authors
Source:
Tetrahedron 2013 v.69 pp. 2827-2833
ISSN:
0040-4020
Subject:
benzene; chemical reactions; chemical structure; coumarin; energy transfer; spectroscopy
Abstract:
... A novel trichromophoric assembly was synthesized, where two molecules of 7-alkoxy-4-methylcoumarin, acting as energy donors, were linked at a fixed distance and controlled geometry to an energy-acceptor bis(alkylaminostyryl) unit. Resonance energy transfer between the two different species was demonstrated by a careful spectroscopic analysis. ...
DOI:
10.1016/j.tet.2013.01.075

6. From Blue to Green: Fine-Tuning of Photoluminescence and Electrochemiluminescence in Bifunctional Organic Dyes

Author:
Quici, Silvio,   et al.   ; Rizzo, Fabio; Polo, Federico; Bottaro, Gregorio; Fantacci, Simona; Antonello, Sabrina; Armelao, Lidia; Maran, Flavio;     Show all 8 Authors
Source:
Journal of the American Chemical Society 2017 v.139 no.5 pp. 2060-2069
ISSN:
1520-5126
Subject:
aniline; cations; dyes; electrochemiluminescence; electrochemistry; energy; fluorenes; photoluminescence; wavelengths
Abstract:
... We describe the synthesis, computational analysis, photophysics, electrochemistry and electrochemiluminescence (ECL) of a series of compounds formed of two triphenylamines linked by a fluorene or spirobifluorene bridge. The phenylamine moieties were modified at the para-position of the two external rings by electron-withdrawing or electron-donating substituents. These modifications allowed for fin ...
DOI:
10.1021/jacs.6b12247

7. A highly fluorescent water soluble spirobifluorene dye with a large Stokes shift: synthesis, characterization and bio-applications

Author:
Quici, Silvio,   et al.   ; Schlüter, Friederike; Riehemann, Kristina; Kehr, Nermin Seda; Daniliuc, Constantin G.; Rizzo, Fabio;     Show all 6 Authors
Source:
Chemical communications 2018 v.54 no.6 pp. 642-645
ISSN:
1364-548X
Subject:
biocompatibility; chemical compounds; chemical reactions; color; cytotoxicity; detection limit; dyes; fluorescence; image analysis; proteins; water solubility
Abstract:
... The first water-soluble spirobifluorene derivative has been synthesized, which exhibits high fluorescence quantum yield and a large Stokes shift (>100 nm). Proteins induce changes in the emission color, allowing to reach the nanomolar detection limit. Cellular uptake and cytotoxicity studies in living cells revealed its biocompatibility, indicating potential application for live cell imaging. ...
DOI:
10.1039/c7cc08761f

8. The age dynamics of vineyards: Past trends affecting the future

Author:
Quici, Luisangela,   et al.   ; Carbone, Anna; Pica, Giovanni;     Show all 3 Authors
Source:
Wine economics and policy 2019 v.8 no.1 pp. 38-48
ISSN:
2212-9774
Subject:
age structure; crops; cultivation area; demography; equations; grapes; issues and policy; markets; plant age; prediction; stakeholders; vines; vineyards; wine industry; wines; Italy
Abstract:
... The paper introduces a modified version of the demographic balance equation commonly used in human demography in the study of populations of permanent crops. The proposed methodology is then applied to analyzing the evolution of the Italian vineyard.In short, the study measures different factors that have had an impact on the extension of the Italian vineyard and on its age structure such as the r ...
DOI:
10.1016/j.wep.2019.02.004