Johannes
Gierschner
website

Home
Publications
Curriculum
Group
Research
Teaching
Links
News
Scientific Integrity
Impressum

 

OptoCT

    OptoCT - Photophysics of Innovative Organic Charge-Transfer Systems
    Financed through MINECO-FEDER 2018-2021, Ref. CTQ2017-87054. Coordinated project between IMDEA Nanoscience (PI: J.Gierschner) and Univ. Valencia (PI Daniel Roca Sanjuan; key researcher - KR: Begoña Milián Medina).

    Researchers involved:
  • Dr. Johannes Gierschner (PI, PL spectroscopy, modelling)
  • Dr. Daniel Roca-Sanjuán (PI, quantum chemistry)
  • Dr. Begoña Milián Medina (KR, quantum chemistry)
  • Juan Carlos Roldao (KR, quantum chemistry)
  • alumni:
  • Dr. Larry Lüer (PI, fs pump-probe spectroscopy), Dr. Santosh Kumar Behera (project Postdoc), Dr. Junqing Shi (project Postdoc), Dr. P. C. Nandajan (project Postdoc)
  • Inhouse collaborations (IMDEA Nanoscience)

  • Dr. Emilio Perez (Carbon Nanotubes)
  • Dr. David Ecija (STM induced EL)
  • Dr. Reinhold Wannemacher (lowT Spectroscopy)
  • External Collaborations
  • Prof. Dr. Soo Young Park, Seoul National University (Materials)
  • Prof. Dr. Gianluca Farinola, Univ. Bari (Materials)
  • Prof. Dr. Roland Resel, Univ. Graz (SXRD)
  • Prof. Dr. Roland Fischer, Univ. Graz (single crystal x-ray)
  • Prof. Dr. Enrico Gnecco, Uiv. Jena (Friction Force AFM)
  • Prof. Dr. Carlos Pina, Univ. Complutense Madrid (Friction Force AFM)
  • Prof. Dr. Jinsang Kim, Univ. Michigan, Ann Arbor (Materials)
  • Prof. Dr. Minsang Kwon, Seoul National University (Materials)
  • Prof. Dr. Antonio Facchetti, Northwestern (Materials)
  • Industry
  • SynChimia
  • FlexTerra
  • OPVIUS
  • News:

  • 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.

  • Highly Efficient Photocatalytic Hydrogen Evolution using a Self-Assembled Octupolar Molecular System
    H.-J. Lee, A. Abudulimu, J. C. Roldao, H. Nam, J. Gierschner, L. Lüer, S. Y. Park, ChemPhotoChem 2023, 7, e202200177.

  • Boosting the Stimulated Emission Properties of Host:Guest Polymer Blends by Inserting Chain Twists in the Host Polymer
    C. Sun, L. Bai, J. C. Roldao, A. Burgos-Caminal, O. Borrell-Grueiro, J. Lin, W. Huang, J. Gierschner, W. Gawelda, L. Bañares, J. Cabanillas-González, Adv. Funct. Mater. 2022, 32, 2206723.

  • 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.

  • Luminescent Assemblies of Pyrene-Containing Bent-Core Mesogens: Liquid Crystals, π-Gels and Nanotubes
    M. Martínez-Abadía, S. Varghese, J. Gierschner, R. Giménez, M. Blanca Ros, J. Mater. Chem. C 2022,10, 12012-12021.

  • 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.

  • Photoswitching Activation of a Ferrocenyl-Stilbene Analogue by its Covalent Grafting to Gold
    F. Bejarano, D. Gutiérrez, J. Catalán-Toledo, D. Roca-Sanjuán, J. Gierschner, J. Veciana, M. Mas-Torrent, C. Rovira, N. Crivillers, Phys. Chem. Chem. Phys. 2022, 24, 6185-6192.

  • Quantum-Chemistry Study of the Ground and Excited State Absorption of Distyrylbenzene: Multi vs. Single Reference Methods
    J. C. Roldao, E. F. Oliviera, B. Milián-Medina, J. Gierschner, D. Roca-Sanjuán, J. Chem. Phys. 2022, 156, 044102.

  • Monitoring Tautomerization of Single Hypericin Molecules in a Tunable Optical λ/2 Microresonator
    L. Wang, Q. Liu, F. Wackenhut, M. Brecht, P.-M. Adam, J. Gierschner, A. J. Meixner, J. Chem. Phys. 2022, 156, 014203.

  • 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.

  • Theoretical and Experimental Evidence of Two-Step Tautomerization in Hypericin
    Q. Liu, L. Wang, J. C. Roldao, P.-M. Adam, M. Brecht, J. Gierschner, F. Wackenhut, A. J. Meixner, Adv. Photonics Res. 2021, 2, 2000170.

  • Direct Observation of Structural Heterogeneity and Tautomerization of Single Hypericin Molecules
    Q. Liu, F. Wackenhut, L. Wang, O. Hauler, J. C. Roldao, P.-M. Adam, M. Brecht, J. Gierschner, A. J. Meixner, J. Phys. Chem. Lett. 2021, 12, 1025–1031.

  • Distinct Helical Molecular Orbitals Through Conformational Lock
    A. Ozcelik, D. Aranda, S. Gil-Guerrero, X. A. Pola-Otero, M. Talavera, L. Wang, S. K. Behera, J. Gierschner, Á. Peña-Gallego, F. Santoro, R. Pereira-Cameselle, J. L. Alonso-Gómez, Chem. Eur. J. 2020, 26, 17342-17349.

  • Solvent-Free Acrylic Pressure-Sensitive Adhesives via a Visible-Light Driven Photocatalytic Radical Polymerization without Additives
    J.-H. Back, Y. Kwon, H.-J. Kim, J. C. Roldao, Y. Yu, H.-J. Kim, J. Gierschner, W. Lee, M. S. Kwon, Green Chem. 2020, 22, 8289-8297.

  • Turn-On Solid State Luminescence by Solvent-Induced Modification of Intermolecular Interactions
    P. Majumdar, M. Ghora, R. Wannemacher, J. Gierschner, S. Varghese, J. Mater. Chem. C, 2020, 8, 15742-15750.

  • Unraveling the Origin of High Efficiency Photoluminescence in Mixed-Stack Isostructural Crystals of Organic Charge-Transfer Complex: Fine-Tuning of Isometric Donor-Acceptor Pairs
    S. Oh, S. K. Park, B. H. Jhun, J. C. Roldao, J. H. Kim, M.-W. Choi, C. H. Ryoo, S. Jung, N. Demitri, R. Fischer, I. E. Serdiuk, R. Resel, J. Gierschner, S. Y. Park, J. Phys. Chem. C 2020, 37, 20377–20387.

  • Combined Spectroscopic and TD-DFT Analysis to Elucidate Substitution and Acidochromic Effects: A Case Study on Amino- vs. Nitro-Substituted 2,4-Diphenylquinolines
    G. Carvalho dos Santos, J. C. Roldao, J. Shi, B. Milián-Medina, L. C. da Silva Filho, J. Gierschner, ChemPhysChem 2020, 21, 1797-1804.

  • Tricolor Fluorescence Switching in a Single Component Mechanochromic Molecular Material
    H.-J. Kim, J. Gierschner, S. Y. Park, J. Mater. Chem. C 2020, 8, 7417-7421.

  • Self-Assembled Amphiphilic Molecules for Highly Efficient Photocatalytic Hydrogen Evolution from Water
    H.-J. Lee, J. Kim, A. Abudulimu, J. Cabanillas-Gonzales, P. C. Nandajan, J. Gierschner, L. Lüer, S. Y. Park, J. Phys. Chem. C 2020, 124, 6971-6978.

  • Tuning of Solid State Luminescence in Conjugated Organic Materials: Control of Excitonic and Excimeric Contributions through π-Stacking and Halogen Bond Driven Self-Assembly
    P. Majumdar, F. Tharammal, J. Gierschner, S. Varghese, ChemPhysChem 2020, 21, 616-624.

  • 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.

  • Excited State Non-Radiative Decay in Stilbenoid Compounds: An ab initio Quantum-Chemistry Study on Size and Substituent Effects
    M. A. Izquierdo, J. Shi, S. Oh, S. Y. Park, B. Milián-Medina, J. Gierschner, D. Roca-Sanjuán, Phys. Chem. Chem. Phys. 2019, 21, 22429-22439.

  • Crossed 2D vs. Slipped 1D pi-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.

  • Organic Photocatalyst for ppm-Level Visible-Light-Driven Reversible Addition-Fragmentation Chain Transfer (RAFT) Polymerization with Excellent Oxygen Tolerance
    Y. Song, Y. Kim, Y. Noh, V. K. Singh, S. K. Behera, A. Abudulimu, K. Chung, R. Wannemacher, J. Gierschner, L. Lüer, M. S. Kwon, Macromol. 2019, 52, 5538-5545.

  • Assembly-Induced Bright-Light Emission from Solution-Processed Platinum(II) Inorganic Polymers
    A. Perevedentsev, F. L. Bargardi, A. Sánchez-Ferrer, N. J. Cheetham, A. Sousaraei, S. Busato, J. Gierschner, B. Milián-Medina, R. Mezzenga, R. Wannemacher, J. Cabanillas Gonzalez, M. Campoy-Quiles, W. R. Caseri, ACS Omega 2019, 4, 10192-10204.

  • 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.

  • Probing the Molecular Orientation of a Single Conjugated Polymer via Nano-gap SERS
    A. R. L. Marshall, M. Roberts, J. Gierschner, J.-S. G. Bouillard, A. M. Adawi, ACS Appl. Polymer Mater. 2019, 1, 1175-1180.

  • 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. 31 (2019) 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.

  • Insight into Water-Soluble Highly Fluorescent Low-Dimensional Host-Guest Supramolecular Polymers: Structure and Energy Transfer Dynamics Revealed by Polarized Fluorescence Spectroscopy
    P. C. Nandajan, H.-J. Kim, S. Casado, S. Y. Park, J. Gierschner, J. Phys. Chem. Lett. 9 (2018) 3870-3877.