1
|
Nath K, Chandra M, Pradhan D, Biradha K. Supramolecular Organic Photocatalyst Containing a Cubanelike Water Cluster and Donor-Acceptor Stacks: Hydrogen Evolution and Dye Degradation under Visible Light. ACS APPLIED MATERIALS & INTERFACES 2018; 10:29417-29424. [PMID: 30106559 DOI: 10.1021/acsami.8b07437] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Supramolecular organic photocatalysts are scarcely explored for the generation of sustainable energy as well as for environmental remediation purposes. An organic photocatalyst, containing a cubanelike water cluster and donor-acceptor stacks, was efficiently developed through a supramolecular approach. The material exhibited remarkable photocatalytic hydrogen generation, in the absence of any cocatalyst, with excellent stability and recyclability. The photoactivity was further assessed through time-resolved photoluminescence and electrochemical impedance spectroscopy. The material also exhibited highly efficient sunlight-driven photocatalytic activity through the degradation of harmful organic dye methylene blue.
Collapse
|
2
|
Demay-Drouhard P, Chamoreau LM, Guillot R, Policar C, Bertrand HC. Synthesis of Homoditopic Ligands with an Incrementable Rodlike Backbone. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Paul Demay-Drouhard
- Département de Chimie, Ecole Normale Supérieure; PSL Research University, UPMC Univ Paris 06; CNRS, Laboratoire des Biomolécules (LBM); 24 rue Lhomond 75005 Paris France
- Sorbonne Universités, UPMC Univ. Paris 06; Ecole Normale Supérieure; CNRS, Laboratoire des Biomolécules (LBM); 24 rue Lhomond 75005 Paris France
| | - Lise-Marie Chamoreau
- Institut Parisien de Chimie Moléculaire; Sorbonne Universités, UPMC Univ Paris 06; CNRS UMR 8232; 4 place Jussieu 75252 Paris France
| | - Régis Guillot
- Institut de Chimie Moléculaire et des Matériaux d′Orsay; Université Paris-Sud; UMR CNRS 8182, Université Paris-Saclay; 91405 Orsay France
| | - Clotilde Policar
- Département de Chimie, Ecole Normale Supérieure; PSL Research University, UPMC Univ Paris 06; CNRS, Laboratoire des Biomolécules (LBM); 24 rue Lhomond 75005 Paris France
- Sorbonne Universités, UPMC Univ. Paris 06; Ecole Normale Supérieure; CNRS, Laboratoire des Biomolécules (LBM); 24 rue Lhomond 75005 Paris France
| | - Hélène C. Bertrand
- Département de Chimie, Ecole Normale Supérieure; PSL Research University, UPMC Univ Paris 06; CNRS, Laboratoire des Biomolécules (LBM); 24 rue Lhomond 75005 Paris France
- Sorbonne Universités, UPMC Univ. Paris 06; Ecole Normale Supérieure; CNRS, Laboratoire des Biomolécules (LBM); 24 rue Lhomond 75005 Paris France
| |
Collapse
|
3
|
Lam T, Avti PK, Pouliot P, Maafi F, Tardif JC, Rhéaume É, Lesage F, Kakkar A. Fabricating Water Dispersible Superparamagnetic Iron Oxide Nanoparticles for Biomedical Applications through Ligand Exchange and Direct Conjugation. NANOMATERIALS (BASEL, SWITZERLAND) 2016; 6:E100. [PMID: 28335228 PMCID: PMC5302624 DOI: 10.3390/nano6060100] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 04/29/2016] [Accepted: 05/13/2016] [Indexed: 12/20/2022]
Abstract
Stable superparamagnetic iron oxide nanoparticles (SPIONs), which can be easily dispersed in an aqueous medium and exhibit high magnetic relaxivities, are ideal candidates for biomedical applications including contrast agents for magnetic resonance imaging. We describe a versatile methodology to render water dispersibility to SPIONs using tetraethylene glycol (TEG)-based phosphonate ligands, which are easily introduced onto SPIONs by either a ligand exchange process of surface-anchored oleic-acid (OA) molecules or via direct conjugation. Both protocols confer good colloidal stability to SPIONs at different NaCl concentrations. A detailed characterization of functionalized SPIONs suggests that the ligand exchange method leads to nanoparticles with better magnetic properties but higher toxicity and cell death, than the direct conjugation methodology.
Collapse
Affiliation(s)
- Tina Lam
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
| | - Pramod K Avti
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
- Department of Electrical Engineering, École Polytechnique de Montréal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Philippe Pouliot
- Department of Electrical Engineering, École Polytechnique de Montréal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Foued Maafi
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Jean-Claude Tardif
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
- Department of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada.
| | - Éric Rhéaume
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
- Department of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada.
| | - Frédéric Lesage
- Department of Electrical Engineering, École Polytechnique de Montréal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
| |
Collapse
|
4
|
Lam T, Avti PK, Pouliot P, Tardif JC, Rhéaume É, Lesage F, Kakkar A. Magnetic resonance imaging/fluorescence dual modality protocol using designed phosphonate ligands coupled to superparamagnetic iron oxide nanoparticles. J Mater Chem B 2016; 4:3969-3981. [PMID: 32263096 DOI: 10.1039/c6tb00821f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A simple and versatile methodology to tailor the surface of superparamagnetic iron oxide nanoparticles (SPIONs), and render additional fluorescence capability to these contrast agents, is reported. The dual modality imaging protocol was developed by designing multi-functional scaffolds with a combination of orthogonal moieties for aqueous dispersion and stealth, to covalently link them to SPIONs, and carry out post-functionalization of nanoparticles. SPIONs stabilized with ligands incorporating surface-anchoring phosphonate groups, ethylene glycol backbone for aqueous dispersion, and free surface exposed OH moieties were coupled to near-infrared dye Cy5.5A. Our results demonstrate that design of multi-tasking ligands with desired combination and spatial distribution of functions provides an ideal platform to construct highly efficient dual imaging probes with balanced magnetic, optical and cell viability properties.
Collapse
Affiliation(s)
- Tina Lam
- Department of Chemistry, McGill University, 801 Sherbrooke St. West, Montreal, Quebec H3A 0B8, Canada.
| | | | | | | | | | | | | |
Collapse
|
5
|
Xiong R, Andres J, Scheffler K, Borbas KE. Synthesis and characterisation of lanthanide-hydroporphyrin dyads. Dalton Trans 2015; 44:2541-53. [DOI: 10.1039/c4dt02448f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Hydroporphyrin-linked lanthanide complexes with variations in tetrapyrrole structure, linker length and mode of attachment are reported.
Collapse
Affiliation(s)
- Ruisheng Xiong
- Department of Chemistry – BMC
- Uppsala University
- 75123 Uppsala
- Sweden
| | - Julien Andres
- Department of Chemistry – BMC
- Uppsala University
- 75123 Uppsala
- Sweden
| | - Kira Scheffler
- Department of Chemistry – BMC
- Uppsala University
- 75123 Uppsala
- Sweden
| | - K. Eszter Borbas
- Department of Chemistry – BMC
- Uppsala University
- 75123 Uppsala
- Sweden
| |
Collapse
|
6
|
Janiga A, Bednarska D, Thorsted B, Brewer J, Gryko DT. Quadrupolar, emission-tunable π-expanded 1,4-dihydropyrrolo[3,2-b]pyrroles – synthesis and optical properties. Org Biomol Chem 2014; 12:2874-81. [DOI: 10.1039/c4ob00143e] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A–D–A chromophores containing pyrrolo[3,2-b]pyrrole, as a central donor moiety, display blue, turquoise, yellow and orange fluorescence, depending on the strength of the electron-withdrawing substituent.
Collapse
Affiliation(s)
- Anita Janiga
- Institute of Organic Chemistry
- Polish Academy of Sciences
- Warsaw, Poland
| | | | - Bjarne Thorsted
- Department of Biochemistry and Molecular Biology
- University of Southern Denmark
- Odense 200-701, Denmark
| | - Jonathan Brewer
- Department of Biochemistry and Molecular Biology
- University of Southern Denmark
- Odense 200-701, Denmark
| | - Daniel T. Gryko
- Institute of Organic Chemistry
- Polish Academy of Sciences
- Warsaw, Poland
- Warsaw University of Technology
- Faculty of Chemistry
| |
Collapse
|
7
|
Yoosaf K, Iehl J, Nierengarten I, Hmadeh M, Albrecht-Gary AM, Nierengarten JF, Armaroli N. A supramolecular photosynthetic model made of a multiporphyrinic array constructed around a C60 core and a C60-imidazole derivative. Chemistry 2013; 20:223-31. [PMID: 24318458 DOI: 10.1002/chem.201303481] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Indexed: 12/11/2022]
Abstract
The photophysical properties of a supramolecular fullerene-porphyrin ensemble resulting from the self-assembly of a pyrrolidinofullerene-imidazole derivative (F1) with a multimetalloporphyrin array constructed around a hexasubstituted fullerene core (F(ZnP)12) have been investigated. The fullerene hexa-adduct core of the host system does not play any active role in the cascade of photoinduced events of the supramolecular ensemble, indeed no intercomponent photoinduced processes could be observed in host F(ZnP)12. In contrast, upon axial coordination with the monosubstituted fullerene guest F1, a quantitative quenching of the fluorescence signal of the metalloporphyrins was observed for the supramolecular complex [F(ZnP)12(F1)n] both in polar and nonpolar solvents. In toluene, the supramolecular ensemble exhibits a charge transfer emission centered around nm, suggesting the occurrence of intramolecular face-to-face interactions of F1 with neighboring metalloporphyrin moieties within the self-assembled photoactive array. This mechanism is supported by the fact that a one order of magnitude increase in the binding constant was observed for the supramolecular complex [F(ZnP)12(F1)n] when compared with a reference system lacking the pyrrolidinofullerene unit. In benzonitrile, a long-lived charge-separated state (τ=0.3 μs) has been detected for the supramolecular adduct.
Collapse
Affiliation(s)
- K Yoosaf
- Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Via Gobetti 101, 40129 Bologna (Italy); Present address: Photosciences and Photonics, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, Kerala (India)
| | | | | | | | | | | | | |
Collapse
|
8
|
1′-Trimethylsilylethynyl-, 1′-ethenyl- and 1′-formyl-1-ethynylferrocenes: syntheses and electrochemical properties. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.093] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
9
|
Lipnická Š, Bělohradský M, Kolivoška V, Pospíšil L, Hromadová M, Pohl R, Chocholoušová JV, Vacek J, Fiedler J, Stará IG, Starý I. Tetrathiafulvalene-Oligo(para-phenyleneethynylene) Conjugates: Formation of Multiple Mixed-Valence Complexes upon Electrochemical Oxidation. Chemistry 2013; 19:6108-21. [DOI: 10.1002/chem.201102868] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 01/08/2013] [Indexed: 11/06/2022]
|
10
|
Iehl J, Vartanian M, Holler M, Nierengarten JF, Delavaux-Nicot B, Strub JM, Van Dorsselaer A, Wu Y, Mohanraj J, Yoosaf K, Armaroli N. Photoinduced electron transfer in a clicked fullerene–porphyrin conjugate. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02310h] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
11
|
Zhou N, Wang L, Thompson DW, Zhao Y. OPE/OPV H-mers: synthesis, electronic properties, and spectroscopic responses to binding with transition metal ions. Tetrahedron 2011. [DOI: 10.1016/j.tet.2010.11.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
12
|
Gégout A, Nierengarten JF, Delavaux-Nicot B, Duhayon C, Saquet A, Listorti A, Belbakra A, Chiorboli C, Armaroli N. Fullerene Derivatives Functionalized with Diethylamino-Substituted Conjugated Oligomers: Synthesis and Photoinduced Electron Transfer. Chemistry 2009; 15:8825-33. [DOI: 10.1002/chem.200901216] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
13
|
James PV, Yoosaf K, Kumar J, Thomas KG, Listorti A, Accorsi G, Armaroli N. Tunable photophysical properties of phenyleneethynylene based bipyridine ligands. Photochem Photobiol Sci 2009; 8:1432-40. [PMID: 19789813 DOI: 10.1039/b9pp00002j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bipyridine-based system with phenyleneethynylene at the 4,4' positions (1) and its p-methyl (2) and p-methoxy (3) substituted derivatives were synthesized via Sonogashira coupling reactions. The photophysical properties of 1-3 and their related H+ and Zn2+ adducts (1:H+-3:H+ and 1:Zn2+-3:Zn2+) were investigated, as a function of solvent polarity, by using steady-state and time-resolved spectroscopic techniques. Molecular systems 1-3 exhibit trans conformation, whereas adducts with H+ and Zn2+ are conformationally locked cis species. The unsubstituted compound 1 emits at 360 nm with low fluorescence quantum yield (phi(fl) = 0.2%) regardless of the solvent polarity. Fluorescence spectra of 2 and 3 are bathochromically shifted in polar solvents, and the p-methoxy (3) derivative possesses phi(fl) as high as 12%. Complexation of 1-3 with H+ or Zn2+ in acetonitrile causes red-shift of the lowest energy absorption bands, whereas dramatic changes of the emission properties are found as a function of the electron donating ability of the substituents on the phenyleneethynylene moiety (-CH3 or -OCH3), suggesting a charge-transfer character of the lowest electronic transition of 1-3. 1:H+, 1:Zn2+, 2:H+ and 2:Zn2+ exhibit intense fluorescence with phi(fl) up to 33% (1:Zn2+) whilst 3:H+ and 3:Zn2+ are found to be weakly emissive. The singlet radiative and non-radiative rate constants of compounds and complexes were determined, along with triplet parameters, via phosphorescence and transient absorption spectroscopy. More conclusive evidence regarding the protonation of bipyridine nitrogen atoms of compounds 1-3 were obtained through 1H NMR titration studies. These studies indicate that the conjugate molecular systems based on 2,2'-bipyridine and phenyleneethenylenes possess tunable optical properties which can be further utilized for preparing organic and inorganic luminophores with potential application in optoelectronic systems.
Collapse
Affiliation(s)
- P V James
- Photosciences and Photonics Group, National Institute for Interdisciplinary Science and Technology (CSIR) (formerly Regional Research Laboratory), Trivandrum, 695019, India
| | | | | | | | | | | | | |
Collapse
|
14
|
Al Ouahabi A, Baxter PNW, Gisselbrecht JP, De Cian A, Brelot L, Kyritsakas-Gruber N. Synthesis and Properties of Oligo[n]cruciforms: Nanosized Sterically Encumbered Tetraethynylphenyl-Homologated Fluorophores. J Org Chem 2009; 74:4675-89. [DOI: 10.1021/jo802797e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Abdelaziz Al Ouahabi
- Institut Charles Sadron, CNRS UPR 022, 6 rue du Loess, F-67083 Strasbourg, France, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Service de Radiocrystallographie, CNRS UMR 7177, and Laboratoire de Chimie de Coordination Organique, CNRS UMR 7140, Institut Le Bel, Université Louis Pasteur, 4 rue Blaise Pascal, F-67070 Strasbourg, France
| | - Paul N. W. Baxter
- Institut Charles Sadron, CNRS UPR 022, 6 rue du Loess, F-67083 Strasbourg, France, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Service de Radiocrystallographie, CNRS UMR 7177, and Laboratoire de Chimie de Coordination Organique, CNRS UMR 7140, Institut Le Bel, Université Louis Pasteur, 4 rue Blaise Pascal, F-67070 Strasbourg, France
| | - Jean-Paul Gisselbrecht
- Institut Charles Sadron, CNRS UPR 022, 6 rue du Loess, F-67083 Strasbourg, France, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Service de Radiocrystallographie, CNRS UMR 7177, and Laboratoire de Chimie de Coordination Organique, CNRS UMR 7140, Institut Le Bel, Université Louis Pasteur, 4 rue Blaise Pascal, F-67070 Strasbourg, France
| | - André De Cian
- Institut Charles Sadron, CNRS UPR 022, 6 rue du Loess, F-67083 Strasbourg, France, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Service de Radiocrystallographie, CNRS UMR 7177, and Laboratoire de Chimie de Coordination Organique, CNRS UMR 7140, Institut Le Bel, Université Louis Pasteur, 4 rue Blaise Pascal, F-67070 Strasbourg, France
| | - Lydia Brelot
- Institut Charles Sadron, CNRS UPR 022, 6 rue du Loess, F-67083 Strasbourg, France, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Service de Radiocrystallographie, CNRS UMR 7177, and Laboratoire de Chimie de Coordination Organique, CNRS UMR 7140, Institut Le Bel, Université Louis Pasteur, 4 rue Blaise Pascal, F-67070 Strasbourg, France
| | - Nathalie Kyritsakas-Gruber
- Institut Charles Sadron, CNRS UPR 022, 6 rue du Loess, F-67083 Strasbourg, France, and Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, Service de Radiocrystallographie, CNRS UMR 7177, and Laboratoire de Chimie de Coordination Organique, CNRS UMR 7140, Institut Le Bel, Université Louis Pasteur, 4 rue Blaise Pascal, F-67070 Strasbourg, France
| |
Collapse
|
15
|
Iehl J, Osinska I, Louis R, Holler M, Nierengarten JF. A stable fullerene-azide building block for the construction of a fullerene–porphyrin conjugate. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.02.185] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
16
|
Holler M, Urbani M, Gégout A, Zhang S, Nierengarten JF. Synthesis of isomeric phenyleneethynylene dendrons and their incorporation in fullerene-based dyads. CR CHIM 2009. [DOI: 10.1016/j.crci.2008.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
17
|
Liu X, Lu R, Xu T, Xu D, Zhan Y, Chen P, Qiu X, Zhao Y. Subporphyrins with Monodisperse Oligocarbazole Arms. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
18
|
Zhu N, Hu W, Han S, Wang Q, Zhao D. Folding a Conjugated Chain: Oligo(o-phenyleneethynylene-alt-p-phenyleneethynylene). Org Lett 2008; 10:4283-6. [DOI: 10.1021/ol801677s] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ningbo Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Wei Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Shuliang Han
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Qi Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Dahui Zhao
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| |
Collapse
|
19
|
Fortage J, Boixel J, Blart E, Hammarström L, Becker HC, Odobel F. Single-Step Electron Transfer on the Nanometer Scale: Ultra-Fast Charge Shift in Strongly Coupled Zinc Porphyrin–Gold Porphyrin Dyads. Chemistry 2008; 14:3467-80. [DOI: 10.1002/chem.200701335] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
20
|
Lauer MG, Leslie JW, Mynar A, Stamper SA, Martinez AD, Bray AJ, Negassi S, McDonald K, Ferraris E, Muzny A, McAvoy S, Miller CP, Walters KA, Russell KC, Wang E, Nuez B, Parish C. Synthesis, Spectroscopy, and Theoretical Calculations for a Series of Push−Pull [14]-Pyridoannulenes. J Org Chem 2007; 73:474-84. [DOI: 10.1021/jo7019724] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
21
|
Clifford JN, Gégout A, Zhang S, Pereira de Freitas R, Urbani M, Holler M, Ceroni P, Nierengarten JF, Armaroli N. Fullerene Derivatives Substituted with Differently Branched Phenyleneethynylene Dendrons: Synthesis, Electronic and Excited State Properties. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700689] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
22
|
An effective, orthogonal deprotection strategy for differentially functionalized, linear and Y-shaped oligo phenylene ethynylenes. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.05.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
23
|
Armaroli N, Accorsi G, Clifford JN, Eckert JF, Nierengarten JF. Structure-Dependent Photoinduced Electron Transfer in Fullerodendrimers with Light-Harvesting Oligophenylenevinylene Terminals. Chem Asian J 2006; 1:564-74. [PMID: 17441094 DOI: 10.1002/asia.200600082] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Oligophenylenevinylene (OPV)-terminated phenylenevinylene dendrons G1-G4 with one, two, four, and eight "side-arms", respectively, were prepared and attached to C60 by a 1,3-dipolar cycloaddition of azomethine ylides generated in situ from dendritic aldehydes and N-methylglycine. The relative electronic absorption of the OPV moiety increases progressively along the fullerodendrimer family C60G1-C60G4, reaching a 99:1 ratio for C60G4 (antenna effect). UV/Vis and near-IR luminescence and transient absorption spectroscopy was used to elucidate photoinduced energy and electron transfer in C60G1-C60G4 as a function of OPV moiety size and solvent polarity (toluene, dichloromethane, benzonitrile), taking into account the fact that the free-energy change for electron transfer is the same along the series owing to the invariability of the donor-acceptor couple. Regardless of solvent, all the fullerodendrimers exhibit ultrafast OPV-->C60 singlet energy transfer. In CH2Cl2, the OPV-->C60 electron transfer from the lowest fullerene singlet level ((1)C60*) is slightly exergonic (deltaG(CS) approximately = 0.07 eV), but is observed, to an increasing extent, only in the largest systems C60G2-C60G4 with lower activation barriers for electron transfer. This effect has been related to a decrease of the reorganization energy upon enlargement of the molecular architecture. Structural factors are also at the origin of an unprecedented OPV-->C60 electron transfer observed for C60G3 and C60G4 in apolar toluene, whereas in benzonitrile, electron transfer occurs in all cases. Monitoring of the lowest fullerene triplet state by sensitized singlet oxygen luminescence and transient absorption spectroscopy shows that this level is populated through intersystem crossing and is not involved in photoinduced electron transfer.
Collapse
Affiliation(s)
- Nicola Armaroli
- Molecular Photoscience Group, Istituto per la Sintesi Organica e la Fotoreattività del CNR, Via Gobetti 101, 40129 Bologna, Italy.
| | | | | | | | | |
Collapse
|
24
|
Khan A, Hecht S. Poly(ortho
-phenylene ethynylene)s: Synthetic accessibility and optical properties. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21238] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
25
|
Clifford JN, Gu T, Nierengarten JF, Armaroli N. Photoinduced energy and electron transfer in fullerene–oligophenyleneethynylene systems: dependence on the substituents of the oligomer unit. Photochem Photobiol Sci 2006; 5:1165-72. [PMID: 17136283 DOI: 10.1039/b611321d] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photophysical properties of fullerene hybrid systems in which disymmetrically substituted linear oligophenyleneethynylene (OPE) substituents have been attached to C(60) through a pyrrolidine ring are discussed. These hybrid systems differ in both the length of the conjugated OPE backbone and in the type of terminating groups employed, i.e. tri-isopropylsilane (-Si(iPr)(3)) and N,N-di-n-butylaniline (PhN(nBu)(2)). The terminating group is found to be crucial in determining the fate of light absorbed by the hybrid. In CH(2)Cl(2) and benzonitrile, the PhN(nBu)(2) terminated hybrids undergo electron transfer with charge separation lasting as long as 390 ns in the more polar medium, as detected via near-infrared transient absorption spectroscopy. Under the same conditions the Si(iPr)(3) terminated hybrids show ultrafast OPE --> C(60) singlet energy transfer (k = 10(9)-10(10) s(-1)) followed by regular deactivation of the C(60) moiety, as determined via UV-VIR-NIR steady state and time-resolved spectroscopy. Only in polar benzonitrile such systems can undergo electron transfer to some extent (40% yield). The results here presented can be readily explained in light of the electrochemical properties of the hybrids. The low oxidation potentials of the PhN(nBu)(2) terminated systems allow the formation of low lying charge separated states ( approximately 1.45 eV) which, in Si(iPr)(3) terminated analogues, are shifted substantially upward ( approximately 1.90 eV) and become hardly accessible via direct excitation or sensitization of the C(60) singlet level (1.72 eV). These results, when examined in light of the performance of photovoltaic devices using these hybrids as active materials, show a nice structure-activity relationship supporting the appeal of the so-called molecular approach to photovoltaic devices.
Collapse
Affiliation(s)
- John N Clifford
- Molecular Photoscience Group, Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Via Gobetti 101, 40129 Bologna, Italy
| | | | | | | |
Collapse
|