Laboratory MOLTECH-Anjou
Presentation of SCL team (Linear Conjugated Systems)


Responsible : Philippe Blanchard (DR)

Permanent people

Philippe Blanchard (DR CNRS) 
Clément Cabanetos (CR CNRS)

Pierre Frère (Pr) 

Frédéric Gohier (MC)

Philippe Leriche (Pr)

Maïténa Oçafrain (MC)


Lionel Sanguinet (MC)

Olivier Segut (MC)

Non-Permanent people

Youssef Aidibi (PhD student)

Amirhossein Habibi (PhD student)

Pierre Josse (PhD student)

Maurizio Mastropasqua (PhD student)

Ravil Petrov (Post Doctoral)



SCL group activity


The group “Linear Conjugated Systems” (SCL) includes specialists in organic synthesis and physical chemistry (CNRS section 13 and sections CNU 31-32).
The activity of the team is focused on the design, synthesis, characterization and applications of molecules, molecular assemblies and materials from conjugated systems.


This activity is divided into 5 main areas:

  • Nano-dynamic objects
  • Surface modification
  • Electronic devices and organic solar cells
  • Semiconductors from biomass
  • Materials for electrodes and functionalized surfaces


All these activities rely on a proven experience and on many fundamental studies
on structure-property relation-ships in organic electro-active conjugated system.





Surface modifications



Two-dimensional organic networks as host for electroactive molecules











Synthesis of nano-objects that can mimic logic circuits by photoswitching. Models for the future design of molecular electronic devices.








Organic electronics and solar cells



Design, synthesis and study of new organic chromophores incorporable as active materials in solar cells and in other electronic devices.
Use of small molecules in place of polymers in solar cells.










Semi-conductors from biomass




Renewable raw materials derived from biomass for organic electronics.










Matérials for electrodes



Functionalized electroactive polymers as sensors or for storage and release of organic compounds or gases.








Publications since 2010


Synthesis of Podands with Cyanurate or Isocyanurate Cores and Terminal Triple Bonds, F. Piron,C. Oprea, C. Cismaşa, A. Tereca, J. Roncali, I. Grosu, Synthesis 2010, 1639

Oligothiophene-Derivatized Azobenzenes as Immobilized Photoswitchable Conjugated Systems, S. Karpe, M. Oçafrain, P. Blanchard, J. Roncali, Chem. Commun. 2010, 3657

Bi-layer hybrid solar cells based on triphenylamine-thienylenevinylene dye and TiO2. E. L. Unger1, E. Ripaud, P. Leriche, A. Cravino, J. Roncali, E. Johansson1, A. Hagfeldt, G. Boschloo, J. Phys. Chem. C, 2010, 114, 11659

Synthesis and Chain-Length Dependence of the Electronic Properties of p-Conjugated Dithieno[3,2-b:2’,3’-d]pyrrole (DTP) Oligomers A. Yassin, P. Leriche, J. Roncali, Macromol. Rapid Comm. 2010, 31, 1467

Electropolymerizable 3D pi-Conjugated Architectures  with Ethylenedioxythiophene (EDOT) End-groups as Precursors of Electroactive Conjugated Networks. F. Piron, P. Leriche, I. Grosu, J. Roncali, J. Mater. Chem. 2010, 20, 10260

High on-off conductance switching ratio in optically driven self-assembled molecular devices, K. Smaali, S. Lenfant, S. Karpe, M. Oçafrain, P. Blanchard, D. Deresmes, S. Godey, A. Rochefort, J. Roncali, D. Vuillaume. ACS Nano, 2010, 4, 2411

A Tailored Hybrid BODIPY-Oligothiophene donor for molecular bulk heterojunction solar cells with improved performances. T. Rousseau, A. Cravino, E. Ripaud, P. Leriche, S. Rihn, A. De Nicola, R. Ziessel, J. Roncali, Chem. Commun. 2010, 5082

Synthesis and Electronic Properties of Terthiophenes b-substituted by (Thienyl)-Cyanovinyl groups. D. Demeter, P. Leriche, I. Grosu, J. Roncali, Tetrahedron Lett. 2010, 51, 4117



Synthesis and Electronic Properties of Poly(3,6-dialkoxythieno[3,2-b]thiophenes N. Hergué, P. Frère, J. Roncali. J. Org. Biol. Chem. 2011, 9, 588

Evaluation of Bis-Dicyanovinyl Short-Chain Conjugated Systems as Donor Materials for Organic Solar cells. A. Yassin, T. Rousseau, P. Leriche, A. Cravino, J.  Roncali, Solar Energy Mater. 2011, 95, 462

Tristhienylphenylamine : extended dithiafulvene hybrids as bifunctional electroactive species, E. Ripaud, P. Leriche, N. Cocherel, T. Cauchy, P. Frère, J. Roncali, Org. Biol. Chem. 2011, 9, 1034

Thiolate chemistry a powerfull and versatile tool for immobilization and post-functionnalization of oligothiophene doubly fixed on gold surface. T.K. Tran, Q. Bricaud, M. Oçafrain, P. Blanchard, J. Roncali, S. Lenfant, D. Vuillaume, D. Rondeau. Chem. Eur. J. 2011, 17, 5628

Facile synthesis of 3-alkoxy4-cyanothiophenes as new building blocks for donor-acceptor conjugated systems. N. Hergué, C. Mallet, S. Gurunathan, M. Allain, P. Frère, J. Roncali, Org. Lett. 2011, 13, 1762.

Influence of the Highest Occupied Molecular Orbital energy level of the donor material on the effectiveness of the anode buffer layer in organic solar cells. J.C. Bernède, L. Cattin, S. Ouro Djobo, M. Morsli, S. R. B. Kanth, S. Patil, P. Leriche, J. Roncali, A. Godoy, F.R. Diaz, M.A. del Valle, Phys. Stat. Solid. 2011, 8, 1989.

Single Materials Solar cells the next frontier for Organic Photovoltaics, J. Roncali, Adv. Energy Mater. 2011, 1, 147.
Non-Doped Solution-Processable Molecular Emitters for Organic Light-Emitting Devices, X. Zhu, J. Peng, Y. Cao, J. Roncali, Chem. Soc. Rev. 2011, 40, 3509.

Unsymmetrical triphenylamine-oligothiophene hybrid conjugated systems as donor materials for high-voltage solution-processed organic  solar cells, E. Ripaud, T. Rousseau, P. Leriche, J. Roncali, Adv. Energy Mater. 2011, 1, 540.

Triphenylamine/Tetracyano-butadiene-Based D-A-D π-Conjugated Systems as Molecular Donors for Organic Solar Cells. A. Leliège, P. Blanchard, T. Rousseau, J. Roncali, Org. Lett. 2011, 13, 3098

Polarizability and Internal Charge-Transfer in Thiophene-Triphenylamine Hybrid pi-Conjugated Systems, E. Ripaud, Y. Olivier, P. Leriche, J. Cornil, J. Roncali, J. Phys. Chem B. 2011, 115, 9379

Manipulation of the open-circuit voltage of organic solar cells by desymmetrization of the molecular structure of A-D-A donors. D. Demeter, T. Rousseau, P. Leriche, T. Cauchy, R. Po, J. Roncali, Adv. Funct. Mater. 2011, 21, 4379.

Molecular Engineering of functional pi-conjugated systems: from molecules to devices. P. Leriche, A Cravino, P. Frère, P. Blanchard, J. Roncali Abstracts of papers of the Am. Chem. Soc. 2011, 241, 264

Extended triphenylamine conjugated systems derivatized by perfluorophenyl groups. E. Ripaud, C. Contribution from a hole-conducting dye to the photocurrent in solid state dye-sensitized solar cells. E. L. Unger, A. Morandeira, M. Persson, B. Zietz, E. Ripaud, P. Leriche, J. Roncali, A. Hagfeldt, G. Boschloo, PhysChemChemPhys. 2011, 13, 20172

3-Alkoxy-4-bromothiophenes : general synthesis of monomers and regio-selective preparation of two dimmers. G. Savitha, N. Hergué, E. Guilmet, M. Allain, P. Frère, Tetrahedron Lett. 2011, 52, 1288-1291

Competition between p-p or furan perfluorophenyl stacking interactions in conjugated compounds prepared from azomethine connections. C. Mallet, M. Allain, P. Leriche, P. Frère, CrystEngComm, 2011, 13, 5833 – 5840.



Structure-properties relationships in conjugated molecules based on diketopyrrolopyrrole for organic photovoltaïcs. E. Ripaud, D. Demeter, T. Rousseau, E. Boucard-Cétol, M. Allain, R. Po, P. Leriche,* J. Roncali*, Dyes and Pigments, 2012, 95, 126-133

Structure-Properties Relationships in Solution-Processable Molecular Emitters for Non-Doped Green Organic-Light Emitting Diodes. Y. Li, B-X. Li, W-Y. Tan, F-Y. Xie, X-H. Zhu,J. Chen, D-G. Ma, J. Peng, Y. Cao, J. Roncali. Organic Electronics. 2012, 12, 1092

Synthesis and electronic properties of D-A-D triads based on 3-alkoxy-4-cyanothiophene and benzothienothiophene blocks.  C. Mallet, G. Savitha, M. Allain,  J. Svoboda,  P. Frère, J.  Roncali. J. Org. Chem. 2012, 77, 2041

A Donor-Acceptor-Donor (D-A-D) molecule based on 3-alkoxy-4-cyanothiophene and Dithienopyrrole units as active material for organic solar cells, A. Yassin, G. Savitha, P. Leriche, P. Frère, J. Roncali, New J. Chem. 2012, 36, 2412

Structural modulation of internal charge transfer in small molecular donors for organic solar cells. A. Leliège, C-H. Le Régent, M. Allain, P. Blanchard, J.  Roncali, Chem Commun. 2012, 48, 8907

A Crown-Ether Loop-Derivatized Oligothiophene Doubly Attached on Gold Surface as Cation-Binding Switchable Molecular Junction. T.K. Tran, K. Smaali, M. Hardouin, Q. Bricaud, M. Oçafrain, P. Blanchard, S. Lenfant, S. Godey, J. Roncali, D. Vuillaume, Adv. Mater. 2013, 25, 427.

 Cryptands and Bismacrocycles with Cyanuric and Isocyanuric Units: Synthesis and Structural Investigations F. Piron, C. Socaci, A. Terec, E. Condamine, R. A. Varga, C. I. Raţ, J. Roncali, I.  Grosu, Tetrahedron, 2012, 68, 8581

Extended benzodifuran-furan derivatives as example of pi-conjugated materials obtained from sustainable approach. C. Moussallem, F. Gohier, C. Mallet, M. Allain, P. Frère, Tetrahedron, 2012, 68, 8617-8621.

Cryptands and Bismacrocycles with Cyanuric and Isocyanuric Units: Synthesis and Structural Investigations F. Piron, C. Socaci, A. Terec, E. Condamine, R. A. Varga, C. I. Raţ, J. Roncali, I.  Grosu, Tetrahedron, 2012, 68, 8581



3,4-Ethylenedioxythiophene (EDOT) as building block for the design of small molecular donors for organic solar cells. D. Demeter, T. Rousseau, J. Roncali, RSC Advances 2013, 3, 704

Donor-acceptor-donor  (D-A-D) molecules based on isoindigo as active material for organic solar cells, A. Yassin, P. Leriche, M. Allain, J. Roncali, New J. Chem. 2013, 37, 502

Macrocycles with Bithiophene Units: Synthesis, Structure and Electrochemical Properties , D. Demeter, C. Lar, J. Roncali, I.  Grosu, Tetrahedron Lett. 2013, 54, 1460

MoO3/CuI hybrid buffer layer as an efficient approach for the optimization of organic solar cells based on a donor-acceptor triphenylamine. J.C. Bernède, L. Cattin, M. Makha, V. Jeux, P. Leriche, J. Roncali, V. Froger, M. Morsli, M. Addou. Solar Energy Mater. 2013, 110, 107

3-hexyl-4-fluorothiophene as building block for tuning the electronic properties of conjugated polythiophenes. F. Gohier, P. Frère, J. Roncali, J. Org. Chem. 2013, 78, 1497

Miniaturization of molecular conjugated systems for organic solar cells: towards pigmy donors, V. Jeux, D. Demeter, P. Leriche, J. Roncali, RSC Advances, 2013,3, 5811

Tuning of the photovoltaic parameters of molecular donors by covalent bridging. D. Demeter, V. Jeux, P. Leriche, P. Blanchard, Y. Olivier, J. Cornil, R. Po, J. Roncali, Adv. Funct. Mater. 2013, 23, 4854.

Synthesis, electronic properties and packing modes of conjugated systems based on 2 ,5-di(cyanovinyl)furan or thiophene and imino-perfluorophenyl moieties. C. Moussalem, F. Gohier, M. Allain, P. Frère, New J. Chem., 2013, 37, 409-415.

Antifouling activity of novel polyisoprene-​based coatings made from photocurable natural rubber derived oligomers R. Jellali, I. Campistron, P. Pasetto, A. Laguerre, F. Gohier, C. Hellio, J.-F Pillard, J.-L. Mouget, Progress in Organic Coatings, 2013, 76(9), 1203-1214.

Electronic properties and field-effect transistors of oligomers end-capped with benzofurane moieties. C. Mallet, Y. Didane, T. Watanabe, N. Yoshimoto, M. Allain, C. Videlot-Ackerman, P. Frère, ChemPlusChem, 2013, 78, 459-466

Synthesis and Characterization of Isomerically Pure Anti- and Syn-Anthradiindole Derivatives J-Y. Balandier, N. Henry, J-B. Arlin, L.  Sanguinet, V. Lemaur, C. Niebel, B. Chattopadhyay, A. Kennedy, P. Leriche, P. Blanchard, J. Cornil, Y Geerts, Org. Lett., 2013, 1, 302-305

A Crown-Ether Loop-Derivatized Oligothiophene Doubly Attached on Gold Surface as Cation-Binding Switchable Molecular Junction. T.K. Tran, K. Smaali, M. Hardouin, Q. Bricaud, M. Oçafrain, P. Blanchard, S. Lenfant, S. Godey, J. Roncali, D. Vuillaume, Adv. Mater. 2013, 25, 427.


Small D-pi-A conjugated systems with o-phenylene bridged accepting units as active materials for organic photovoltaics. A. Leliège, D. Demeter, V. Jeux, T. Rousseau, P. Leriche, P. Blanchard, J. Roncali, Chem Eur. J.  2013, 19, 9948



Exploiting the potential of 2-((5-(4-(diphenylamino)phenyl)thiophen-2-yl)methylene)malononitrile as an efficient donor molecule in vacuum-processed bulk-heterojunction organic solar cellsJ.W. Choi,  C.H. Kim, J. Pison, A. Oyedele, H. Derbal-Habak, D. Tondelier, A. Leliège, E. Kirchner, P. Blanchard , J. Roncali, B. Geffroy RSC Advances 2014, 4, 5236.

Molecular materials for organic photovoltaics: Small is beautiful. J. Roncali, P. Leriche, P. Blanchard Adv. Mater. 2014, 26,3821

Elaboration of nano-structured electrode materials by electropolymerization of thiophene-based tailored 3D precursors . A. Yassin, R. Mallet, P. Leriche, J. Roncali, ChemElectroChem 2014, 1, 1219.

Small molecular donors for organic solar cells obtained by simple and clean chemistry. D. Demeter, S. Mohamed, A. Diac, I. Grosu, J. Roncali, ChemSusChem, 2014, 7, 1046

Synthesis of hybrid electroactive materials by electropolymerization of gold-nanoparticles capped with EDOT-thiophene units. A. Yassin, M. Oçafrain, P. Blanchard, R. Mallet, J. Roncali, ChemElectroChem. 2014,1, 1312

Chain length dependence of the photovoltaic properties of monodisperse donor-acceptor oligomers as model compounds of polydisperse low band gap polymers C. Zhou, Y. Liang, F. Liu, C. Sun, X. Huang, Z. Xie, F. Huang, J. Roncali, T.  Russell, Y.  Cao. Adv. Funct. Mater. 2014, 24, 7538



One-step synthesis of D-A-D chromophores as active materials for organic solar cells by basic condensation. V. Jeux, O. Segut, D. Demeter, T. Rousseau, M. Allain, C. Dalinot, L. Sanguinet, P. Leriche, J. Roncali. Dyes and Pigments 2015, 14, 402

A bridged low band gap A-D-A quaterthiophene as efficient donor for organic solar cells. F. Baert, C. Cabanetos, A. Leliège, E. Kirchner, O. Segut, O. Alévêque, M. Allain, P. Leriche, G. Seo, S. Jung, D. Tondelier, B. Geffroy, J. Roncali, P. Blanchard. J. Mater. Chem. 2015, 3, 390

Solution-processable thienoisoindigo-based molecular donors for organic solar cells with high open-circuit voltage. O. Vybornyi, Y. Jiang, F. Baert, D. Demeter, S. Dabos, J. Roncali, P. Blanchard, C. Cabanetos, Dyes and Pigments 2015, 115, 17.

Simple and versatile molecular donors for organic photovoltaics prepared by metal-free synthesis. A. Diac, D. Demeter, M. Allain, I. Grosu, J. Roncali, Chem. Eur. J. 2015, 21, 1598.

Improvement of the photovoltaic performances of triarylamine-based donor-acceptor systems by naphtyl groups. S. Mohamed, D. Demeter, P. Blanchard, J.-A. Laffitte, J. Roncali, Scientific Reports. (DOI: 10.1038/srep09031)