Johannes
Gierschner
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Research

Our research is dedicated to the understanding of Photophysics of Organic and Hybrid Supramolecular Nanosystems. The ultimate goal, i.e. unbiased, targeted design of tailor-made systems for optoelectronics and energy conversion, can only be reached in an interdisciplinary manner, which we tackle in an integrative spectroscopic & computational approach, based on a strong background in chemistry & materials science.

This crossroad approach allows for a thorough and systematic insight into the electronic, optical and photophysical properties of novel conjugated oligomeric & polymeric materials from diluted systems, via molecular dyads & complexes and nanostructured supramolecular host-guest compounds, to condensed phases, such as nanoparticles, thin films and liquid crystals, but in particular single crystalline systems, which allow for a detailed understanding of structure-property relationships.
The multi-disciplinary character of the field calls for intense collaboration with synthesists, material scientists, quantum chemists, laser physicists, and device engineers, which we have established in the past years through (inter)national research projects, my current regular visiting researcher positions at Seoul National University, University of Valencia and an adjunct professorship at the University of Tübingen.

Interests

Optical and photophysical properties of conjugated organic molecules (oligomers, polymers, dyes) in solution (nature of the excited states, chainlength evolution, excited state ordering, potential energy surfaces, singlet-triplet gaps, optical bandshapes, deactivation pathways):
  • Nature of the molecular backbone: heteroatoms, conjugation length, push-pull systems, low bandgap materials, quinoid systems etc.
  • Substituents: inductive & mesomeric effects, sterical hindrance, torsional flexibility
  • Matrix effects: temperature, rigidity/viscosity, charges, counterions

Model compounds for inter-chromophore interactions:
  • Covalently bridged dimers
  • (Metal)organic molecular dyads & polyads

Supramolecular Polymers by Nanostructured Host-Guest Compounds (Molecules in Nanochannels):
  • host-guest interactions, molecular mobilites,
  • guest-guest interactions, optical & photophysical properties
  • 3D exciton diffusion, light harvesting

Solid state optical and photophysical properties of conjugated organic materials:

  • Structure-property relationships in polymers:
    aggregation/folding, order vs. disorder, exciton length, excitonic vs. electronic coupling, exciton confinement

  • Structure-property relationships in well defined oligomer single crystals:
    Exciton signatures: size effects, H- vs J-aggregation, herringbone vs. pi-stacks, excitons vs. excimers,
    Exciton fates: poly-/crystallinity, exciton coherence, (stimulated) emission enhancement, PL quenching mechanisms, exciton diffusion

  • Multichromphoric Systems:
    cocrystals, molecular dyads, optically addressable host-guest systems, carbon-chromophore assemblies

Materials

Conjugated organic oligomers / polymers, and dyes
(e.g. phenylenevinylenes, thiophenes, phenylenes, fluorenes...) in
  • Solution (fluid, solid, frozen)
  • Suspended nanoparticles
  • Thin Films (vapor-deposited, spin-coated, drop-casted)
  • Single crystals
  • Liquid crystals
  • Host guest compounds (perhydrotriphenylene, curcurbit[8]urils, zeolites)

Methods

Experimental

  • UV/Vis-spectroscopy (polarized, angular-resolved)
  • Fluorescence spectroscopy (steady-state, polarized, angular-resolved, time-resolved, temperature dependent with open and closed-cycle He-cryostats, fluorescence quantum yields)
  • Fluorescence microscopy (two-photon excitation, time-resolved, polarized)
  • Dynamic light-scattering
  • Static light-scattering spectroscopy (polarized, angular- and wavelength resolved)
  • Reflectance spectroscopy
  • Raman spectroscopy & microscopy
  • Preparation techniques: (i) nanoparticle suspensions by precipitation techniques, (ii) organic thin films by vapour-deposition, (iii) single crystals and host-guest compounds by (co-)crystallization from solution and from the melt

Computational

  • Quantum chemical calculations: conformational studies, electronic structure, optical transitions, spectra, Raman and IR active vibrational modes, solvent effects intermolecular interactions, QM/MM. Methods: (TD)DFT, semi-empirical (ZINDO/S)

  • (Semi-)classical methods: solvent shifts (Lorentz reaction field, Onsager solvent models), vibronic coupling, inhomogeneous broadening, intermolecular interactions (Kasha's exciton model, reaction field methods), energy transfer: generalized Förster theory, Markov/MC descriptions, light scattering (Mie theory, anisotropic Rayleigh)

Reviews, Feature Articles, Progress Reports, Perspectives & Book Chapters

  • Dual Emission: Classes, Mechanisms and Conditions
    S. K. Behera, S. Y. Park, J. Gierschner, Angew. Chem. Int. Ed. 2021, 60, 22624-22638.

  • Duale Emission: Klassen, Mechanismen and Bedingungen
    S. K. Behera, S. Y. Park, J. Gierschner, Angew. Chem. 2021, 133, 22804-22820.

  • Luminescence in Crystalline Organic Materials: From Molecules to Molecular Solids
    J. Gierschner, J. Shi, D. Roca-Sanjuán, B. Milián-Medina, S. Varghese, S. Y. Park, Adv. Opt. Mater. 2021, 9, 2002251.

  • 'Though It Be but Little, It is Fierce' - Excited State Engineering of Conjugated Organic Materials by Fluorination
    B. Milián-Medina, J. Gierschner, J. Phys. Chem. Lett. 8 (2017) 91–101.

  • Stabilizing and Modulating Color by Copigmentation: Insights from Theory and Experiment
    P. Trouillas, J. C. Sancho-García, V. De Freitas, J. Gierschner, M. Otyepka, O. Dangles, Chem. Rev. 116 (2016) 4937–4982.

  • Organic Single Crystal Lasers - a Materials View
    J. Gierschner, S. Varghese, S. Y. Park, Adv. Opt. Mater. 4 (2016) 348–364.

  • Optical Properties of Wine Pigments: Theoretical Guidelines with new Methodological Perspectives
    P. Trouillas, F. Di Melo, J. Gierschner, M. Linares, J.-C. Sancho-García, M. Otyepka, Tetrahedron 71 (2015) 3079-3088.

  • Computational Engineering of Low Bandgap Copolymers
    M. Wykes, B. Milán Medina, J. Gierschner, Front. Chem. 1 (2013) 35.

  • Luminescent Distyrylbenzenes: Tailoring Molecular Structure and Crystalline Morphology
    J. Gierschner, S. Y. Park, J. Mater. Chem. C 1 (2013) 5818–5832.

    see also... Hot Papers J. Mater. Chem. 2013, and ChemInform

  • Highly Emissive H-Aggregates or Aggregation-Induced Emission Quenching? The Photophysics of All-Trans Para-Distyrylbenzene
    J. Gierschner, L. Lüer, B. Milián-Medina, D. Oelkrug, H.-J. Egelhaaf, J. Phys. Chem. Lett. 4 (2013) 2686-2697.
    ...watch the video
    a/o take a look at the LifeSlides, and read the Editor's Comment

  • Directional Exciton Transport in Supramolecular Nanostructured Assemblies
    J. Gierschner, Phys. Chem. Chem. Phys. 14 (2012) 13146-13153.

  • pi-Conjugation
    B. Milián-Medina, J. Gierschner, WIREs Comput. Mol. Sci. 2 (2012) 513-524.
    WILEY Hottest Articles in Organic Chemistry.

  • pi-Conjugated Cyanostilbene Derivatives: A Unique Self-Assembly Motif for Molecular Nanostructures with Enhanced Emission and Transport
    B.-K. An, J. Gierschner, S. Y. Park, Acc. Chem. Res. 45 (2012) 544-554.

  • Optical Bandgaps of pi-Conjugated Organic Materials at the Polymer Limit: Experiment and Theory
    J. Gierschner, J. Cornil, H.-J. Egelhaaf, Adv. Mater. 19 (2007) 173-191.

  • Optical Properties of Oligophenylenevinylenes
    J. Gierschner, D. Oelkrug, in H. Nalwa (Ed.): Encyclopedia of Nanoscience and Nanotechnology, Vol. 8, American Scientific Publishers (2004) 219-238.

    • Research Highlights

  • Donor-Acceptor-Donor Triads with Flexible Spacers: Deciphering Complex Photophysics for Targeted Materials Design
    S. Feng, L. Wang, B. Milián-Medina, A. J. Meixner, M. S. Kwon, S. Y. Park, R. Wannemacher, J. Gierschner, Adv. Mater. 2023, 35, 2306678.

  • Anomalous Deep-Red Luminescence of Perylene Black Analogues with Strong π-π Interactions
    N. Tang, J. Zhou, L. Wang, M. Stolte, G. Xie, X. Wen, L. Liu, F. Würthner, J. Gierschner, Z. Xie, Nature Commun. 2023, 14, 1922.

  • Formation and Degradation of Strongly Reducing Cyanoarene-Based Radical Anions towards Efficient Radical Anion-Mediated Photoredox Catalysis
    Y. Kwon, J. Lee, Y. Noh, D. Kim, Y. Lee, C. Yu, J. C. Roldao, S. Feng, J. Gierschner, R. Wannemacher, M. S. Kwon, Nature Commun. 2023, 14, 92.

  • Accurate Calculation of Excited State Absorption for Small-to-Medium Sized Conjugated Oligomers: Multiconfigurational Treatment vs. Quadratic Response TD-DFT
    J. C. Roldao, E. F. Oliviera, B. Milián-Medina, J. Gierschner, D. Roca-Sanjuán, J. Chem. Theor. Comp. 2022, 18, 5449–5458.

  • Water-Soluble Organic Photocatalyst Discovered for Highly Efficient Additive-Free Visible-Light-Driven Grafting of Polymers from a Protein at Ambient and Aqueous Environments
    Y. Lee, Y. Kwon, Y. Kim, C. Yu, S. Feng, J. Park, J. Doh, R. Wannemacher, B. Koo, J. Gierschner, M. S. Kwon, Adv. Mater. 2022, 34, 2108446.

  • Pure Boric Acid Does Not Show Room Temperature Phosphorescence (RTP)
    Z. Wu, J. C. Roldao, F. Rauch, A. Friedrich, M. Ferger, F. Würthner, J. Gierschner, T. B. Marder, Angew. Chem. Int. Ed. 2022, 61, e202200599.

  • Counterion-Mediated Crossing of the Cyanine Limit in Crystals and Fluid Solution: Bond Length Alternation and Spectral Broadening Unveiled by Quantum Chemistry
    M. Eskanderi, J. C. Roldao, J. Cerezo, B. Milián-Medina, J. Gierschner, J. Am. Chem. Soc. 2020, 142, 2835-2843.

  • Crossed 2D vs. Slipped 1D p-Stacking in Polymorphs of Crystalline Organic Thin Films: Impact on the Electronic and Optical Response
    M. J. Aliaga-Gosalvez, M. Demitri, M. Dohr, J. C. Roldao, S. K. Park, S. Oh, S. Varghese, S. Oh, S. Y. Park, Y. Olivier, B. Milián-Medina, R. Resel, J. Gierschner, Adv. Opt. Mater. 2019, 7, 1900749.

  • Inverted Energy Gap Law for the Nonradiative Decay in Fluorescent Floppy Molecules: Larger Fluorescence Quantum Yields for Smaller Energy Gaps
    J. Shi, M. A. Izquierdo, S. Oh, S. Y. Park, B. Milián-Medina, D. Roca-Sanjuán, J. Gierschner, Org. Chem. Front. 2019, 6, 1948-1954.

  • Highly Efficient and Stable Inverted Perovskite Solar Cells Obtained via Treatment by Semiconducting Chemical Additive
    J. C. Yu, S. Badgujar, E. D. Jung, V. K. Singh, D. W. Kim, J. Gierschner, E. Lee, Y. S. Kim, S. Cho, M. S. Kwon, M. H. Song, Adv. Mater. 2019, 31, 1805554.

  • Highly Efficient Organic Photocatalysts Discovered via a Computer-Aided-Design Strategy for Visible-Light-Driven Atom Transfer Radical Polymerization
    V. K. Singh, C. Yu, S. Badgujar, Y. Kim, Y. Kwon, D. Kim, J. Lee, T. Akhter, G. Thangavel, L. S. Park, J. Lee, P. C. Nandajan, R. Wannemacher, B. Milián-Medina, L. Lüer, K. S. Kim, J. Gierschner, M. S. Kwon, Nat. Catal. 1 (2018) 794-804.

  • Light Harvesting Fluorescent Supramolecular Block Copolymers Based on Cyanostilbene Derivatives and Cucurbit[8]urils in Aqueous Solution
    H.-J. Kim, P. C. Nandajan, J. Gierschner, S. Y. Park, Adv. Funct. Mater. 28 (2018) 1705141.

  • Designing High Performance All-Small-Molecule Solar Cell with Non-Fullerene Acceptors: Comprehensive Studies on Photoexcitation Dynamics and Charge Separation Kinetics
    J. Shi, A. Isakova, A. Abudulimu, M. van den Berg, O. K. Kwon, A. J. Meixner, S. Y. Park, D. Zhang, J. Gierschner, L. Lüer, Energy Environ. Sci. 11 (2018) 211--220.
    see also... Hot Papers Energy Environ. Sci. 2018

  • Solid State Luminescence Enhancement in p-Conjugated Materials: Unraveling the Mechanism beyond the Framework of AIE/AIEE
    J. Shi, L. E. Aguilar Suarez, S.-J. Yoon, S. Varghese, C. Serpa, S. Young Park, L. Lüer, D. Roca Sanjuán, B. Milián Medina, J. Gierschner, J. Phys. Chem. C 121 (2017) 23166-23183.

  • Highly Luminescent 2D-type Slab Crystals Based on a Molecular Charge-Transfer Complex as Promising Organic Light-Emitting Transistor Materials
    S. K. Park, J. H. Kim, T. Ohto, R. Yamada, A. O. F. Jones, D. R. Whang, I. Cho, S. Oh, S. H. Hong, J. E. Kwon, J. H. Kim, Y. Olivier, R. Fischer, R. Resel, J. Gierschner, H. Tada, S. Y. Park, Adv. Mater. 29 (2017) 1701346.

  • Highly Enhanced Fluorescence of Supramolecular Polymers Based on a Cyanostilbene Derivative and Cucurbit[8]uril in Aqueous Solution
    H.-J. Kim, D. R. Whang, J. Gierschner, S. Y. Park, Angew. Chem. Int. Ed. 55 (2016) 15915–15919.

  • Naphthalenediimide Polymers with Finely Tuned in-Chain π-Conjugation. Electronic Structure, Film Microstructure, and Charge Transport Properties
    T. Erdmann, S. Fabiano, B. Milián-Medina, D. Hanifi, Z. Chen, M. Berggren, J. Gierschner, A. Salleo, A. Kiriy, B. Voit, A. Facchetti, Adv. Mater. 28 (2016) 9169–9174.

  • Stimuli-Responsive Reversible Fluorescence Switching in a Crystalline Donor-Acceptor Mixture Film: Mixed Stack Charge-Transfer Emission vs. Segregated Stack Monomer Emission
    S. K. Park, I. Cho, J. Gierschner, J. H. Kim, J. H. Kim, J. E. Kwon, O. K. Kwon, D. R. Whang, J. H. Park, B.-K. An, S. Y. Park, Angew. Chem. Int. Ed. 55 (2016) 203-207.

  • Suppressing Molecular Motions for Enhanced Room-Temperature Phosphorescence of Metal-Free Organic Materials
    M. S. Kwon, Y. Yu, C. Coburn, A. W. Phillips, K. Chung, A. Shanker, J. Jung, G. Kim, K. Pipe, S. R. Forrest, J. H. Youk, J. Gierschner, J. Kim, Nature Commun. 6 (2015) 8947.

  • Shear-Triggered Crystallization and Light Emission of a Thermally Stable Organic Supercooled Liquid
    K. Chung, M. S. Kwon, B. M. Leung, A. G. Wong-Foy, M. S. Kim, J. Kim, S. Takayama, J. Gierschner, A. J. Matzger, J. Kim, ACS Cent. Sci. 1 (2015) 94-102.
    ...watch the video:

  • High Contrast Red-Green-Blue Tricolor Fluorescence Switching in Bicomponent Molecular Film
    H.-J. Kim, D. R. Whang, J. Gierschner, C. H. Lee, S. Y. Park, Angew. Chem. Int. Ed. 54 (2015) 4330-4333.

  • A Distyrylbenzene Based Highly Efficient Deep Red/Near-Infrared Emitting Organic Solid
    M. A. Kim, D. R. Whang, J. Gierschner, S. Y. Park, J. Mater. Chem. C 3 (2015) 231-234.

  • Rationally Designed Molecular D–A–D Triad for Piezochromic and Acidochromic Fluorescence On–Off Switching
    M. S. Kwon, J. Gierschner, J. Seo, S. Y. Park, J. Mat. Chem. C 2 (2014) 2552-2557.

  • Tailor-made Highly Luminescent and Ambipolar Transporting Organic Mixed Stacked Charge-Transfer Crystals: an Isometric Donor-Acceptor Approach
    S. K. Park, S. Varghese, J. H. Kim, S.-J. Yoon, O. K. Kwon, B.-K. An, J. Gierschner, S. Y. Park, J. Am. Chem. Soc. 135 (2013) 4757-4764.

  • Color-Tuned, Highly Emissive Dicyanodistyrylbenzene Single Crystals: Manipulating Intermolecular Stacking Interactions for Spontaneous and Stimulated Emission Characteristics
    S.-J. Yoon, S. Varghese, S. K. Park, R. Wannemacher, J. Gierschner, S. Y. Park, Adv. Opt. Mater. 1 (2013) 232-237.

  • Stimulated Resonance Raman Scattering and Lasing Oscillation in Highly Emissive Distyrylbenzene Based Molecular Crystals
    S. Varghese, S.-J. Yoon, E. M. Calzado, S. Casado, P. G. Boj, M. A. Díaz-García, R. Resel, R. Fischer, B. Milián-Medina, R. Wannemacher, S. Y. Park, J. Gierschner, Adv. Mater. 24 (2012) 6473-6478.

  • Unique Piezochromic Fluorescence Behavior of Dicyanodistyrylbenzene Based Donor–Acceptor–Donor Triad: Mechanically Controlled Photo-induced Electron Transfer (eT) in Molecular Assemblies
    M. S. Kwon, J. Gierschner, S.-J. Yoon, S. Y. Park, Adv. Mater. 24 (2012) 5487–5492.

  • Multi-Stimuli Two-Color Luminescence Switching via Different Slip-Stacking of Highly Fluorescent Molecular Sheets
    S.-J. Yoon, J. W. Chung, J. Gierschner, K. S. Kim, M.-G. Choi, D. Kim, S. Y. Park, J. Am. Chem. Soc. 132 (2010) 13675–13683.
    Meet the JACS Challenge!
    • JACS Select: Surface Patterning: More Than Just Scratching the Surface! Watch the video:

  • Conjugated Polymers with Large Effective Stokes Shift: Benzobisdioxole-based Poly(phenyleneethynylene)s
    T. Dutta, K. B. Woody, S. R. Parkin, M. D. Watson, J. Gierschner, J. Am. Chem. Soc. 131 (2009) 17321-17327.
    SynFacts: Shifting the Emission through Localization of the HOMO.

  • A White-Light-Emitting Molecule: Frustrated Energy Transfer between Constituent Emitting Centers
    S. Park, J. E. Kwon, S. H. Kim, J. Seo, K. W. Chung, S.-Y. Park, D.-J. Jang, B. Milián Medina, J. Gierschner, S. Y. Park, J. Am. Chem. Soc. 131 (2009) 14043-14049.

    • ACS Press Pac:'New approach in the quest for a lighting’s Holy Grail'
    SynFacts of the month: ...And "Then There Was White".
    NPG Asia Materials research highlight: White light sources: Molecular mixing.

  • Exciton versus Electronic Couplings in Molecular Assemblies: The Importance of Non-Nearest Neighbour Interactions
    J. Gierschner, Y.-S. Huang, B. Van Averbeke, J. Cornil, R. H. Friend, D. Beljonne, J. Chem. Phys 130 (2009) 044105.

  • Three-Dimensional Energy Transport in Highly Luminescent Host-Guest Crystals: A Quantitative Experimental and Theoretical Study
    L. Poulsen, M. Jazdzyk, J.-E. Communal, J. C. Sancho-García, A. Mura, G. Bongiovanni, D. Beljonne, J. Cornil, M. Hanack, H.-J. Egelhaaf, J. Gierschner, J. Am. Chem. Soc. 129 (2007) 8585-8593.

  • Highly Fluorescent Crystalline and Liquid Crystalline Columnar Phases of Pyrene-Based Structures
    A. Hayer, V. de Halleux, A. Köhler, A. El-Garoughy, E.W. Meijer, J. Barberá, J. Tant, J. Levin, M. Lehmann, J. Gierschner, J. Cornil, Y. H. Geerts, J. Phys. Chem. B 110 (2006), 7653-7659.

  • Solid State Optical Properties of Linear Polyconjugated Molecules: pi-Stack contra Herringbone
    J. Gierschner, M. Ehni, H.-J. Egelhaaf, B. Milián Medina, D. Beljonne, H. Benmansour, G. C. Bazan, J. Chem. Phys. 123 (2005) 144914.

  • Optical Spectra of Oligothiophenes: Vibronic States, Torsional Motions, and Solvent Shifts
    J. Gierschner, H.-G. Mack, H.-J. Egelhaaf, S. Schweizer, B. Doser, D. Oelkrug, Synth. Met. 138 (2003) 311-315.

  • Fluorescence and Absorption Spectra of Oligophenylenevinylenes: Vibronic Coupling, Band Shapes and Solvatochromism
    J. Gierschner, H.-G. Mack, L. Lüer, D. Oelkrug, J. Chem. Phys. 116 (2002) 8596-8609.

  • Preparation and Optical Properties of Oligophenylenevinylene/Perhydrotriphenylene Inclusion Compounds
    J. Gierschner, L. Lüer, D. Oelkrug, E. Musluoglu, B. Behnisch, M. Hanack, Adv. Mater. 12 (2000) 757-761.

  • Tuning of Fluorescence Yields in Films and Nanoparticles of Oligophenylenevinylenes
    D. Oelkrug, A. Tompert, J. Gierschner, H.-J. Egelhaaf, M. Hanack, M. Hohloch, E. Steinhuber,
    J. Phys. Chem. B 102 (1998) 1902-1907.

  • Electronic Deactivation in Single Chains, Nano-Aggregates and Ultrathin Films of Conjugated Oligomers
    D. Oelkrug, H.-J. Egelhaaf, J. Gierschner, A. Tompert, Synth. Met. 76 (1996) 249-253.

    • Collaborations

      Joint Projects

    • Project OPtoCT: 01/2018-12/2021, financed by the Spanish Minstry for Science
    • IMDEA Nanoscience - Severo Ochoa Center of Excellence (MINECO SEV-2016-0686)
    • Synergy Grant Fulmaten (Madrid Regional Goverment Y2018/NMT-5028)

      • Bilateral Collaborations

    • since 2019Nuria Crivellers, ICMAB (Spain) Photoswitches
    • since 2019S. A. Jursenas, Vilnius Lithuania) Exciton Diffusion in Single Crystals
    • since 2019 F. Santoro, G. Prampolini, CNR Pisa (Italy)Solvent Broadening
    • since 2019 J. Cerezo, UAM (Spain) Coupled MD/QM calculations
    • since 2019 J. L. Alonso-Gómez Univ. Vigo (Spain) Chiral Luminescent Systems
    • since 2018 Shinto Varghese, IACS (India) Solid State Luminescence
    • since 2018 A. Adawi, Hull (UK)SERS
    • since 2017 Daniel Roca Sanjuán, ICMol, Valencia (Spain) Nonradiative Excited State Deactivation
    • since 2017 D. R. Whang, Seoul (Korea) Photosensitizers
    • since 2015 Minsang Kwon, UNIST, Ulsan (Korea) Photophysics and Reactivity in Novel Conjugated Materials
    • since 2014 Frank Würthner, University of Würzburg, Germany Photohysics of Donor-Acceptor Compounds
    • since 2014 Heiner Detert, University of Mainz, Germany Acidochromic Compounds
    • since 2014 Antonio Facchetti, Northwestern University (USA) Optical properties Donor-Acceptor Copolymers
    • since 2013 Jinsang Kim, University of Michigan (USA) Photophysics and Reactivity in Novel Conjugated Materials
    • since 2012Enrico Gnecco, Univ. Jena (Germany) Nanoscale Imaging of Poly- and Single Crystals of Conjugated Materials
    • since 2011 Roland Resel, University of Graz (Austria) X-ray Characterization
    • since 2008 Soo Young Park, Seoul National University (South Korea) Novel materials for optoelectronic applications
    • since 2007 Gianluca Farinola, University of Bari (I) Fluorinated oligophenylenes
    • since 2007 Mark Watson, University of Kentucky (USA) Electronc and optical properties of novel PPE-type polymers and air-stable n-type stable oligomers
    • since 2007 Alfred Meixner & Dai Zhang, University of Tübingen (Germany) Localized Excitations in Nanostructured Conjugated Materials
    • since 2004 Begoña Milián-Medina, University of Valencia (Spain) Electronic and Optical Properties of Conjugated Materials
    • since 2003 David Beljonne & Jerome Cornil, University of Mons (Belgium) Computational Approaches to Novel materials
    • since 1992 Hans-Joachim Egelhaaf, Erlangen (Germany) Photophysics in Conjugated Materials
    former projects

    • Project MultiCrom: 2015-2018, financed by the Spanish Minstry for Science
    • MAD2D (Comunidad Madrid, 2014-2018)
    • COST action MP1302 Nanospectroscopy, 15.11.2013-14.11.2017.
    • POCAONTAS (Marie-Curie ITN; Coord.: L. Lüer, IMDEA Nanoscience; 11/2012-10/2016)
    • PORPHYPLANT (ANR project; Coord.: Stephanie Lhez, Limoges, France, 01/2013-12/2015)
    • ITN projct ESTABLIS (PI IMDEA: Larry Lüer): 01/2012-12/2015
    • Project CONMOL: 01/2012-12/2013, financed by the Spanish Minstry for Science
    • SolarRevolution (IEF Marie-Curie project; PI: Mike Wykes, Coord.: J.G., 05/2013-04/2015)
    • Project NanoBioMagnet, financed by the Comunidad Madrid.
    • 2006 - 2010 Coordination of a Research Training Network, funded by the European Community (with Dr. H.-J. Egelhaaf, IPTC, University of Tübingen, Germany): RTN NANOMATCH - Supramolecular Nanostructured Organic/Inorganic Hybrid Systems

      Herein active collaborations with D. Beljonne & J. Cornil (Mons, B), R. Janssen (Eindhoven, NL), Luisa de Cola (Münster, D), A. Meixner (Tübingen, D), H.-J. Egelhaaf (Nürnberg, D), A. Prodi-Schwab (Marl, D), S. Brasselet (Marseille, F), R. Tubino & F. Meinardi (Milan, I), C. Botta (Milano, I), G. Bongiovanni & A Mura (Cagliari, I) J. Hulliger (Bern, CH), G. Calzaferri (Bern, CH), M. Hanack (Tübingen, D).

    • 2002 - 2006 Coordination of a Research Training Network, funded by the European Community (together with Dr. H.-J. Egelhaaf, IPTC, University of Tübingen, Germany): RTN NANOCHANNEL - Molecules in Nanochannels - Synthesis, Spectroscopy and Applications

      Herein active collaborations with D. Beljonne & J. Cornil (Mons, B), S. Brasselet (Cachan, F), R. Tubino & F. Meinardi (Milan, I), C. Botta (Milano, I), G. Bongiovanni & A Mura (Cagliari, I), M. Hanack (Tübingen, D).

    • 2015-2017 Rosario Nuñez, ICMAB, Barcelona, Spain Carborane-Organic Hybrid Complexes
    • 2015-2016 Lucas Viani, University Carlos III, Madrid, Spain Calculations of Exciton Dynamics in Conjugated Compounds
    • 2014-2017 Francisco Lavarda, Universidade Estadual Paulista, Bauru, Brazil Computation of Low Bandgap Polymers
    • 2012-2017 Carlos Pina, University Complutense MadridNanoscale Imaging of Poly- and Single Crystals of Conjugated Materials
    • 2011-2016 Patrick Trouillas, University of Limoges (France) Optical & Electronic Properties of Polyphenoles
    • 2014-2016 Stefan Hecht, Humboldt University Berlin , Germany Fluorinated Compounds
    • 2013-2017 Blanca Ros & Raquel Giménez, University of Zaragoza (Spain) Photophysics in Liquid Crystalline Conjugated Systems
    • 2012-2013 Conor Hogan, CNR Rome (Italy) Excitons in Polyconjugated Systems
    • 2010-2014 Luisa de Cola, University of Strasbourg (France) Exciton Diffusion in Zeolites
    • 1992 - 2013 Dieter Oelkrug, Tübingen (Germany) Photophysics in Conjugated Materials
    • 2011-2012 María Diaz García, University of Alicante (Spain) Lasing Studies
    • 2005 - 2011 Richard Friend, Cambridge (UK) Molecular Conformation and Raman-activity
    • 1995 - 2011 Michael Hanack, University of Tübingen (D) Optical properties of Oligophenylenevinylenes
    • 2007 - 2009 René Janssen, Technical University of Eindhoven (NL) Novel Materials
    • 2008 - 2009 Henk Bolink & Enrique Ortí, University of Valencia (E) Ir-complex dyads
    • 2007 - 2008 Peter Bäuerle & Elena Mena-Osteritz, Ulm (D) EDOT-type materials
    • 2007 - 2009 Greg Scholes, Toronto (Ca) Exciton Relaxation in MEHPPV chains
    • 2007 - 2008 John Anthony, University of Kentucky (USA) Substituent Effect in TIPS pentacenes
    • 2008 Juan Cabanillas, Milano (I) Subsitituent effects in Oligofluorenes
    • 2007 Iain Mc Culloch, University College London (UK) Novel Materials
    • 2007 Carlos Silva, University of Montreal (CA) Exciton transport in molecular crystals
    • 2005 - 2007 Yves Geerts, University of Brussels (Belgium) Novel materials
    • 2005 - 2007 Ji-Seon Kim, Cambridge (UK) Molecular Conformation and Raman-activity
    • 2005 - 2006 Anna Köhler, Bayreuth (Germany) Modeling of Intermolecular Interaction in Fluorescent Liquid Crystals
    • 2003 - 2005 Guillermo Bazan, University of California (USA)
      Spectroscopy on Oligophenylenevinylene Single Crystals
    • 2000 - 2005 Roberto Martinez Alvarez, University Complutense Madrid (E) Optical properties of Oligophenylenevinylenes
    • 2000 - 2004 Hans-Georg Mack, IPTC, University of Tübingen, Germany
      Ab initio calculations of the optical properties of p-conjugated organic molecules
    • 1998 - 1999 Boehringer Ingelheim Pharma KG, Biberach (Germany)
      Dynamic and angular resolved static light scattering spectroscopy of nanoparticle suspensions and emulsions
    • 1997 P. C. Schmidt, Pharmaceutical Institute, University of Tübingen, Germany, Reflectance spectroscopy on dyes absorbed on zeolites
    • 1997 - 1999 Beckman Coulter Inc., Krefeld (Germany)
      Dynamic light scattering spectroscopy of nanoparticle suspensions

       

       

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