1
|
Mishra G, Sasmal M, Chakraborty A, Thirupathi B. Synthesis of Highly Functionalized Spirocycles and Pentafulvene-Containing Dyes Involving 2-(2'-ketoalkyl)-1,3-indandiones. Chemistry 2023; 29:e202301976. [PMID: 37817469 DOI: 10.1002/chem.202301976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/28/2023] [Accepted: 10/11/2023] [Indexed: 10/12/2023]
Abstract
Synthesis of highly functionalized spiro[4.4]nonane and spiro[4.5]decane motifs by the reaction of dimethylacetylenedicarboxylate (DMAD) with 2-(2'-ketoalkyl)-1,3-indandiones and 2-(3'-ketoalkyl)-1,3-indandiones, respectively, has been developed by utilizing a catalytic amount of DABCO. The tertiary hydroxy-containing spiro[4.4]nonane products were converted into fully conjugated pentafulvene π-systems in an acidic medium through dehydration and unprecedented C-C bond rearrangement.
Collapse
Affiliation(s)
- Gitanjali Mishra
- Department of Chemical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Govt. ITI Building, NH 59, Engineering School Road, Ganjam-District, 760 010, Berhampur, Odisha, India
| | - Mukesh Sasmal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Govt. ITI Building, NH 59, Engineering School Road, Ganjam-District, 760 010, Berhampur, Odisha, India
| | - Arundhuti Chakraborty
- Department of Chemical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Govt. ITI Building, NH 59, Engineering School Road, Ganjam-District, 760 010, Berhampur, Odisha, India
| | - Barla Thirupathi
- Department of Chemical Sciences, Indian Institute of Science Education and Research Berhampur, Transit Campus, Govt. ITI Building, NH 59, Engineering School Road, Ganjam-District, 760 010, Berhampur, Odisha, India
| |
Collapse
|
2
|
Valentini F, Sabuzi F, Forchetta M, Conte V, Galloni P. KuQuinones: a ten years tale of the new pentacyclic quinoid compound. RSC Adv 2023; 13:9065-9077. [PMID: 36950082 PMCID: PMC10025941 DOI: 10.1039/d3ra00539a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 03/13/2023] [Indexed: 03/22/2023] Open
Abstract
Quinones are widespread in nature, as they participate, mainly as redox mediators, in several biochemical processes. Up to now, various synthetic quinones have been recommended in the literature as leading molecules in energy, biomedical and catalytic fields. In this brief review, we retraced our research activity in the last ten years, mainly dedicated to the study of a new class of peculiar pentacyclic conjugated quinoid compounds, synthesized in our group. In particular, their application as sensitive materials in photoelectrochemical devices and in biosensors, as photocatalysts in selective oxidation reactions, and their anticancer activity is here reviewed.
Collapse
Affiliation(s)
- Francesca Valentini
- Department of Chemical Science and Technologies, University of Rome Tor Vergata via della ricerca scientifica snc 00133 Rome Italy
| | - Federica Sabuzi
- Department of Chemical Science and Technologies, University of Rome Tor Vergata via della ricerca scientifica snc 00133 Rome Italy
| | - Mattia Forchetta
- Department of Chemical Science and Technologies, University of Rome Tor Vergata via della ricerca scientifica snc 00133 Rome Italy
| | - Valeria Conte
- Department of Chemical Science and Technologies, University of Rome Tor Vergata via della ricerca scientifica snc 00133 Rome Italy
| | - Pierluca Galloni
- Department of Chemical Science and Technologies, University of Rome Tor Vergata via della ricerca scientifica snc 00133 Rome Italy
| |
Collapse
|
3
|
Forchetta M, Sabuzi F, Stella L, Conte V, Galloni P. KuQuinone as a Highly Stable and Reusable Organic Photocatalyst in Selective Oxidation of Thioethers to Sulfoxides. J Org Chem 2022; 87:14016-14025. [PMID: 36219841 DOI: 10.1021/acs.joc.2c01648] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A chemoselective photocatalytic system to perform thioether oxidation to sulfoxide is presented. The light-induced oxidation process is here promoted by a metal-free quinoid catalyst, namely 1-hexylKuQuinone (KuQ). Reactions performed in a fluorinated solvent (i.e., HFIP), using O2 as the oxidant, at room temperature, lead to complete thioanisole conversion to methyl phenyl sulfoxide in 60 min. Remarkably, the system can be recharged and recycled without a loss of activity and selectivity, reaching turnover numbers (TONs) higher than 4000. Excellent catalytic performances and full selectivity have also been obtained for the photocatalytic oxidation of substituted thioanisole derivatives, aliphatic, cyclic, and diaryl thioethers. Likewise, the oxidation of heteroaromatic organosulfur compounds can be accomplished, with longer reaction times.
Collapse
Affiliation(s)
- Mattia Forchetta
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Federica Sabuzi
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Lorenzo Stella
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Valeria Conte
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Pierluca Galloni
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Rome, Italy
| |
Collapse
|
4
|
Volpato GA, Colusso E, Paoloni L, Forchetta M, Sgarbossa F, Cristino V, Lunardon M, Berardi S, Caramori S, Agnoli S, Sabuzi F, Umari P, Martucci A, Galloni P, Sartorel A. Artificial photosynthesis: photoanodes based on polyquinoid dyes onto mesoporous tin oxide surface. Photochem Photobiol Sci 2021; 20:1243-1255. [PMID: 34570354 DOI: 10.1007/s43630-021-00097-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 08/30/2021] [Indexed: 12/27/2022]
Abstract
Dye-sensitized photoelectrochemical cells represent an appealing solution for artificial photosynthesis, aimed at the conversion of solar light into fuels or commodity chemicals. Extensive efforts have been directed towards the development of photoelectrodes combining semiconductor materials and organic dyes; the use of molecular components allows to tune the absorption and redox properties of the material. Recently, we have reported the use of a class of pentacyclic quinoid organic dyes (KuQuinone) chemisorbed onto semiconducting tin oxide as photoanodes for water oxidation. In this work, we investigate the effect of the SnO2 semiconductor thickness and morphology and of the dye-anchoring group on the photoelectrochemical performance of the electrodes. The optimized materials are mesoporous SnO2 layers with 2.5 μm film thickness combined with a KuQuinone dye with a 3-carboxylpropyl-anchoring chain: these electrodes achieve light-harvesting efficiency of 93% at the maximum absorption wavelength of 533 nm, and photocurrent density J up to 350 μA/cm2 in the photoelectrochemical oxidation of ascorbate, although with a limited incident photon-to-current efficiency of 0.075%. Calculations based on the density functional theory (DFT) support the role of the reduced species of the KuQuinone dye via a proton-coupled electron transfer as the competent species involved in the electron transfer to the tin oxide semiconductor. Finally, a preliminary investigation of the photoelectrodes towards benzyl alcohol oxidation is presented, achieving photocurrent density up to 90 μA/cm2 in acetonitrile in the presence of N-hydroxysuccinimide and pyridine as redox mediator and base, respectively. These results support the possibility of using molecular-based materials in synthetic photoelectrochemistry.
Collapse
Affiliation(s)
- Giulia Alice Volpato
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131, Padua, Italy
| | - Elena Colusso
- Department of Industrial Engineering and INSTM, University of Padova, F. Marzolo 9, 35131, Padua, Italy
| | - Lorenzo Paoloni
- Department of Physics and Astronomy, University of Padova, Via F. Marzolo 8, 35131, Padua, Italy
| | - Mattia Forchetta
- Department of Chemical Science and Technologies, University of Rome "Tor Vergata", Via della Ricerca Scientifica, snc, 00133, Rome, Italy
| | - Francesco Sgarbossa
- Department of Physics and Astronomy, University of Padova, Via F. Marzolo 8, 35131, Padua, Italy
| | - Vito Cristino
- Department of Chemical and Pharmaceutical Sciences, Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem), Sez. di Ferrara, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Marco Lunardon
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131, Padua, Italy
| | - Serena Berardi
- Department of Chemical and Pharmaceutical Sciences, Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem), Sez. di Ferrara, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Stefano Caramori
- Department of Chemical and Pharmaceutical Sciences, Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SolarChem), Sez. di Ferrara, University of Ferrara, Via L. Borsari 46, 44121, Ferrara, Italy
| | - Stefano Agnoli
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131, Padua, Italy
| | - Federica Sabuzi
- Department of Chemical Science and Technologies, University of Rome "Tor Vergata", Via della Ricerca Scientifica, snc, 00133, Rome, Italy
| | - Paolo Umari
- Department of Physics and Astronomy, University of Padova, Via F. Marzolo 8, 35131, Padua, Italy.
| | - Alessandro Martucci
- Department of Industrial Engineering and INSTM, University of Padova, F. Marzolo 9, 35131, Padua, Italy.
| | - Pierluca Galloni
- Department of Chemical Science and Technologies, University of Rome "Tor Vergata", Via della Ricerca Scientifica, snc, 00133, Rome, Italy.
| | - Andrea Sartorel
- Department of Chemical Sciences, University of Padova, Via F. Marzolo 1, 35131, Padua, Italy.
| |
Collapse
|
5
|
A Sustainable Improvement of ω-Bromoalkylphosphonates Synthesis to Access Novel KuQuinones. ORGANICS 2021. [DOI: 10.3390/org2020010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Owing to the attractiveness of organic phosphonic acids and esters in the pharmacological field and in the functionalization of conductive metal-oxides, the research of effective synthetic protocols is pivotal. Among the others, ω-bromoalkylphosphonates are gaining particular attention because they are useful building blocks for the tailored functionalization of complex organic molecules. Hence, in this work, the optimization of Michaelis–Arbuzov reaction conditions for ω-bromoalkylphosphonates has been performed, to improve process sustainability while maintaining good yields. Synthesized ω-bromoalkylphosphonates have been successfully adopted for the synthesis of new KuQuinone phosphonate esters and, by hydrolysis, phosphonic acid KuQuinone derivatives have been obtained for the first time. Considering the high affinity with metal-oxides, KuQuinones bearing phosphonic acid terminal groups are promising candidates for biomedical and photo(electro)chemical applications.
Collapse
|
6
|
Valentini F, Sabuzi F, Conte V, Nemykin VN, Galloni P. Unveiling KuQuinone Redox Species: An Electrochemical and Computational Cross Study. J Org Chem 2021; 86:5680-5689. [PMID: 33827213 PMCID: PMC8154575 DOI: 10.1021/acs.joc.1c00165] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Indexed: 11/30/2022]
Abstract
The study of the electrochemical properties of variegated quinones is a fascinating topic in chemistry. In fact, redox reactions occurring with quinoid scaffolds are essential for most of their applications in biological systems, in photoelectrochemical devices, and in many other fields. In this paper, a detailed investigation of KuQuinones' redox behavior is presented. The distinctiveness of such molecules is the presence in the structure of two condensed naphthoquinone units, which implies the possibility to undergo multiple one-electron reduction processes. Solvent, supporting electrolyte, and hydrogen bond donor species effects have been elucidated. Changing the experimental parameters provoked significant shift of the redox potential for each reduction process. In particular, additions of 2,2,2-trifluoroethanol as a hydrogen bond donor in solution as well as Lewis acid coordination were crucial to obtain important shifts of the redox potentials toward more favorable values. UV-vis-NIR spectroelectrochemical experiments and DFT calculations are also presented to clarify the nature of the reduced species in solution.
Collapse
Affiliation(s)
- Francesca Valentini
- Department
of Chemical Science and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133, Italy
- Department
of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Federica Sabuzi
- Department
of Chemical Science and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133, Italy
| | - Valeria Conte
- Department
of Chemical Science and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133, Italy
| | - Victor N. Nemykin
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
- Department
of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Pierluca Galloni
- Department
of Chemical Science and Technologies, University
of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133, Italy
| |
Collapse
|
7
|
Sabuzi F, Coletti A, Conte V, Floris B, Galloni P. Zinc porphyrin-anthraquinonylimidazole supramolecular dyads. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424619501943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this work, the synthesis and spectroscopic characterization of new zinc porphyrin-anthraquinone dyads is proposed. In particular, electron donor units based on zinc meso-tetraphenylporphyrin (ZnTPP) and zinc octaethylporphyrin (ZnOEP) have been coupled with differently substituted anthraquinones as acceptors. The quinone moiety was properly functionalized with imidazole, thus ensuring porphyrin complexation through zinc ion coordination. Accordingly, absorption and emission measurements demonstrated that the coordination occurred, and calculated binding constants were in the range 6.6 [Formula: see text] 10[Formula: see text]–3.9 [Formula: see text] 10[Formula: see text] M[Formula: see text]. Transient absorption spectroscopy for ZnTPP and ZnOEP dyads demonstrated that the electron transfer occurred, with the formation of the corresponding charge separated state, ZnTPP[Formula: see text]-AQ. Moreover, in ZnOEP complexes, a strong correlation between the chain length and flexibility with the charge separated state lifetime was observed.
Collapse
Affiliation(s)
- Federica Sabuzi
- Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Alessia Coletti
- Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Valeria Conte
- Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Barbara Floris
- Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Pierluca Galloni
- Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica snc, 00133 Rome, Italy
| |
Collapse
|
8
|
Onuki M, Ota M, Otokozawa S, Kamo S, Tomoshige S, Tsubaki K, Kuramochi K. Dimerizations of 2-bromo-3-methyl-1,4-naphthoquinone and 2-methyl-1,4-naphthoquinone in tetra-n-butylammonium bromide. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130899] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
9
|
Volpato GA, Marasi M, Gobbato T, Valentini F, Sabuzi F, Gagliardi V, Bonetto A, Marcomini A, Berardi S, Conte V, Bonchio M, Caramori S, Galloni P, Sartorel A. Photoanodes for water oxidation with visible light based on a pentacyclic quinoid organic dye enabling proton-coupled electron transfer. Chem Commun (Camb) 2020; 56:2248-2251. [PMID: 31993616 DOI: 10.1039/c9cc09805d] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel pentacyclic quinoid photosensitizer with extended absorption in the visible region and enabling proton-coupled electron transfer is employed in photoelectrodes for water oxidation in combination with a ruthenium polyoxometalate catalyst.
Collapse
|
10
|
Tiravia M, Sabuzi F, Cirulli M, Pezzola S, Di Carmine G, Cicero DO, Floris B, Conte V, Galloni P. 3,7-Bis(N
-methyl-N
-phenylamino)phenothiazinium Salt: Improved Synthesis and Aggregation Behavior in Solution. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900504] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Martina Tiravia
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Via della Ricerca Scientifica snc 00133 Rome Italy
| | - Federica Sabuzi
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Via della Ricerca Scientifica snc 00133 Rome Italy
| | - Martina Cirulli
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Via della Ricerca Scientifica snc 00133 Rome Italy
- School of Biological and Chemical Sciences; Queen Mary University of London; Mile End Road E1 4NS London United Kingdom
| | - Silvia Pezzola
- BT-InnoVaChem srl; Via della Ricerca Scientifica snc 00133 Rome Italy
| | - Graziano Di Carmine
- Department of Chemical and Pharmaceutical Sciences; University of Ferrara; Via L. Borsari 4 44121 Ferrara Italy
| | - Daniel Oscar Cicero
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Via della Ricerca Scientifica snc 00133 Rome Italy
| | - Barbara Floris
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Via della Ricerca Scientifica snc 00133 Rome Italy
| | - Valeria Conte
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Via della Ricerca Scientifica snc 00133 Rome Italy
| | - Pierluca Galloni
- Department of Chemical Science and Technologies; University of Rome Tor Vergata; Via della Ricerca Scientifica snc 00133 Rome Italy
| |
Collapse
|
11
|
Sabuzi F, Coletti A, Pomarico G, Floris B, Galloni P, Conte V. Modulating electron transfer in ferrocene-naphthoquinone dyads: New insights in parameters influencing ET efficiency. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
12
|
Sabuzi F, Lentini S, Sforza F, Pezzola S, Fratelli S, Bortolini O, Floris B, Conte V, Galloni P. KuQuinones Equilibria Assessment for Biomedical Applications. J Org Chem 2017; 82:10129-10138. [PMID: 28872314 DOI: 10.1021/acs.joc.7b01602] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A small library of pentacyclic quinoid compounds, called KuQuinones (KuQs), has been prepared through a one-pot reaction. KuQuinones complex structure is made up by two naphthoquinone units connected by a five-membered ring. Due to KuQs structural features, keto-enol tautomerization in solution likely occurs, leading to the generation of four different species, i.e., the enol, the enolate, the external enol and the diquinoid species. The interchange among KuQ tautomers leads to substantial spectral variations of the dye depending on the experimental conditions used. The comprehension of tautomeric equilibria of this new class of quinoid compounds is strongly required in order to explain their behavior in solution and in biological environment. UV-vis, 1H NMR spectroscopies, and DFT calculations resulted appropriate tools to understand the nature of the prevalent KuQuinone species in solution. Moreover, due to the structural similarity of KuQuinones with camptothecin (CPT), a largely used anticancer agent, KuQs have been tested against Cisplatin-resistant SKOV3 and SW480 cancer cell lines. Results highlighted that KuQs are highly active toward the analyzed cell lines and almost nontoxic for healthy cell, indicating a high specific activity.
Collapse
Affiliation(s)
- Federica Sabuzi
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata" , Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Sara Lentini
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata" , Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Fabio Sforza
- Dipartimento di Scienze Chimiche e Farmaceutiche, and Dipartimento di Scienze della Vita e Biotecnologie, Università di Ferrara , via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Silvia Pezzola
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata" , Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Silvia Fratelli
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata" , Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Olga Bortolini
- Dipartimento di Scienze Chimiche e Farmaceutiche, and Dipartimento di Scienze della Vita e Biotecnologie, Università di Ferrara , via Luigi Borsari 46, 44121 Ferrara, Italy
| | - Barbara Floris
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata" , Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Valeria Conte
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata" , Via della Ricerca Scientifica snc, 00133 Rome, Italy
| | - Pierluca Galloni
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata" , Via della Ricerca Scientifica snc, 00133 Rome, Italy
| |
Collapse
|
13
|
Bonomo M, Sabuzi F, Di Carlo A, Conte V, Dini D, Galloni P. KuQuinones as sensitizers for NiO based p-type dye-sensitized solar cells. NEW J CHEM 2017. [DOI: 10.1039/c6nj03466g] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
KuQuinones have been used for the first time as dyes in NiO-based p-type DSSCs.
Collapse
Affiliation(s)
- Matteo Bonomo
- Dept. of Chemistry
- University of Rome Sapienza
- 00185 Rome
- Italy
| | - Federica Sabuzi
- Dept. of Chemical Sciences and Technologies
- University of Rome Tor Vergata
- 00133 Rome
- Italy
| | - Aldo Di Carlo
- Centre for Hybrid and Organic Solar Energy (CHOSE)
- Dept. of Electronic Engineering
- University of Rome Tor Vergata
- 00133 Rome
- Italy
| | - Valeria Conte
- Dept. of Chemical Sciences and Technologies
- University of Rome Tor Vergata
- 00133 Rome
- Italy
| | - Danilo Dini
- Dept. of Chemistry
- University of Rome Sapienza
- 00185 Rome
- Italy
| | - Pierluca Galloni
- Dept. of Chemical Sciences and Technologies
- University of Rome Tor Vergata
- 00133 Rome
- Italy
| |
Collapse
|
14
|
A small organic compound enhances the religation reaction of human topoisomerase I and identifies crucial elements for the religation mechanism. Biosci Rep 2013; 33:e00025. [PMID: 23368812 PMCID: PMC3590572 DOI: 10.1042/bsr20120118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The different steps of the human Top1 (topoisomerase I) catalytic cycle have been analysed in the presence of a pentacyclic-diquinoid synthetic compound. The experiments indicate that it efficiently inhibits the cleavage step of the enzyme reaction, fitting well into the catalytic site. Surprisingly the compound, when incubated with the binary topoisomerase-DNA cleaved complex, helps the enzyme to remove itself from the cleaved DNA and close the DNA gap, increasing the religation rate. The compound also induces the religation of the stalled enzyme-CPT (camptothecin)-DNA ternary complex. Analysis of the molecule docked over the binary complex, together with its chemical properties, suggests that the religation enhancement is due to the presence on the compound of two oxygen atoms that act as hydrogen acceptors. This property facilitates the deprotonation of the 5' DNA end, suggesting that this is the limiting step in the topoisomerase religation mechanism.
Collapse
|