Disordered Molecular Materials
Ramanan Lab @VU Amsterdam

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    2024

  1. Competitive Charge Separation Pathways in a Flexible Molecular Folda-Dimer
    K. Thakur, S. Datta, P. Blom, D. Chaudhuri, C. Ramanan
    The Journal of Physical Chemistry B 2024 128 1760-1770 DOI:10.1021/acs.jpcb.3c07134


  2. Oxidative two-state photoreactivity of a manganese(IV) complex using near-infrared light
    N. East, R. Naumann, C. Förster, C. Ramanan, G. Diezemann, K. Heinze
    Nature Chemistry 2024 DOI:10.1038/s41557-024-01446-8


  3. Ultrafast Surface-Specific Spectroscopy of Water at a Photoexcited TiO2 Model Water-Splitting Photocatalyst
    E. Backus, S. Hosseinpour, C. Ramanan, S. Sun, S. Schlegel, M. Zelenka, X. Jia, M. Gebhard, A. Devi, H. Wang, M. Bonn
    Angewandte Chemie International Edition 2024 63 e202312123 DOI:10.1002/anie.202312123


    4. 2023

  4. Nanoscale Thermometry of Plasmonic Structures via Raman Shifts in Copper Phthalocyanine
    P. Li, S. Askes, E. del Pino Rosendo, F. Ariese, C. Ramanan, E. von Hauff, A. Baldi
    The Journal of Physical Chemistry C 2023 127 9690-9698 DOI:10.1021/acs.jpcc.3c01561


  5. Symmetry-breaking charge transfer and intersystem crossing in copper phthalocyanine thin films
    E. del Pino Rosendo, O. Yildiz, W. Pisula, T. Marszalek, P. Blom, C. Ramanan
    Physical Chemistry Chemical Physics 2023 25 6847-6856 DOI:10.1039/D2CP05240G


    6. 2022

  6. Pseudo-Octahedral Iron(II) Complexes with Near-Degenerate Charge Transfer and Ligand Field States at the Franck-Condon Geometry
    J. Moll, R. Naumann, L. Sorge, C. Förster, N. Gessner, L. Burkhardt, N. Ugur, P. Nuernberger, W. Seidel, C. Ramanan, M. Bauer, K. Heinze
    Chemistry – A European Journal 2022 28 e202201858 DOI:10.1002/chem.202201858


  7. Grain engineering for improved charge carrier transport in two-dimensional lead-free perovskite field-effect transistors
    S. Wang, S. Frisch, H. Zhang, M. Mandal, N. Ugur, B. Jeong, C. Ramanan, D. Adrienko, H. Wang, M. Bonn, P. Blom, M. Kivala, W. Pisula, T. Marszalek
    Materials Horizons 2022 9 2633-2643 DOI:10.1039/D2MH00632D


  8. Molecular Ruby: Exploring the Excited State Landscape
    W. Kitzmann, C. Ramanan, R. Naumann, K. Heinze
    Dalton Transactions 2022 51 6519-6525 DOI:10.1039/d2dt00569g


  9. In Situ Visualization and Quantification of Electrical Self-Heating in Conjugated Polymer Diodes Using Raman Spectroscopy
    S. Maity, C. Ramanan, F. Ariese, R. MacKenzie, E. von Hauff
    Advanced Electronic Materials 2022 8 2101208 DOI:10.1002/AELM.202101208


  10. Role of Linker Functionality in Polymers Exhibiting Main-Chain Thermally Activated Delayed Fluorescence
    K. Philipps, Y. Ie, B. van der Zee, R.Q. Png, P. Ho, L.L. Chua, E. del Pino Rosendo, C. Ramanan, G.-J. Wetzelaer, P. Blom, J.J. Michels
    Advanced Science 2022 9 2200056 DOI:10.1002/advs.202200056


    11. 2021

  11. Quantifying Exciton Annihilation Effects in Thermally Activated Delayed Fluorescence Materials
    K. Thakur, B. van der Zee, G.-J. Wetzelaer, C. Ramanan, P. Blom
    Advanced Optical Materials 2021 10 2101784 DOI:10.1002/adom.202101784


  12. Universal Electroluminescence at Voltages below the Energy Gap in Organic Light-Emitting Diodes
    Y. Li, O. Sachnik, B. van der Zee, K. Thakur, C. Ramanan, G.-J. Wetzelaer, P. Blom
    Advanced Optical Materials 2021 9 2101149 DOI:10.1002/adom.202101149


  13. Reduced Intrinsic Non-Radiative Losses Allow Room-Temperature Triplet Emission from Purely Organic Emitters
    Y. Li, L. Jiang, W. Liu, S. Xu, T.Y. Li, F. Fries, O. Zeika, Y. Zou, C. Ramanan, S. Lenk, R. Scholz, D. Adrienko, X. Feng, K. Leo, S. Reineke
    Advanced Materials 2021 33 2101844 DOI:10.1002/adma.202101844


  14. Strongly Red-Emissive Molecular Ruby [Cr(bpmp)2]3+ Surpasses [Ru(bpy)3]2+
    F. Reichenauer, C. Wang, C. Förster, P. Boden, N. Ugur, R. Baez-Cruz, J. Kalmbach, L.M. Carrella, E. Rentschler, C. Ramanan, G. Niedner-Schatteburg, M. Gerhards, M. Seitz, U. Resch-Genger, K. Heinze
    Journal of the American Chemical Society 2021 143 11843-11855 DOI:10.1021/JACS.1C05971


  15. Role of pH in the synthesis and growth of gold nanoparticles using L-asparagine: A combined experimental and simulation study
    R. Baez-Cruz, L.A. Baptista, S. Ntim, P. Manidurai, S. Espinoza, C. Ramanan, R. Cortes-Huerto, M. Sulpizi
    Journal of Physics Condensed Matter 2021 33 254005 DOI:10.1088/1361-648X/abf6e3


    16. 2020

  16. Insight into Electron Transfer from a Redox Polymer to a Photoactive Protein
    R. Białek, K. Thakur, A. Ruff, M.R. Jones, W. Schuhmann, C. Ramanan, K. Gibasiewicz
    Journal of Physical Chemistry B 2020 124 11123-11132 DOI:10.1021/acs.jpcb.0c08714


  17. Exciton Quenching due to Hole Trap Formation in Aged Polymer Light-Emitting Diodes
    I. Rörich, Q. Niu, B. van der Zee, E. del Pino Rosendo, N.I. Crăciun, C. Ramanan, P. Blom
    Advanced Electronic Materials 2020 6 1700643 DOI:10.1002/aelm.201700643


  18. Experimental Observation of Strong Exciton Effects in Graphene Nanoribbons
    A. Tries, S. Osella, P. Zhang, F. Xu, C. Ramanan, M. Kläui, Y. Mai, D. Beljonne, H.I. Wang
    Nano Letters 2020 20 2993-3002 DOI:10.1021/acs.nanolett.9b04816


  19. Trap-Assisted Triplet Emission in Ladder-Polymer-Based Light-Emitting Diodes
    E. Khodabakhshi, C. Ramanan, J.J. Michels, S. Bonus, D. Hertel, K. Meerholz, M. Forster, U. Scherf, P. Blom
    Advanced Electronic Materials 2020 6 200082 DOI:10.1002/aelm.202000082


  20. Co-Interlayer Engineering toward Efficient Green Quasi-Two-Dimensional Perovskite Light-Emitting Diodes
    F. Meng, X. Liu, Y. Chen, M. Li, T. Shi, Z. Chen, D. Chen, H.L. Yip, C. Ramanan, P. Blom, S.J. Su
    Advanced Functional Materials 2020 30 1-9 DOI:10.1002/adfm.201910167


  21. A PMMA-based heterogeneous photocatalyst for visible light-promoted [4 + 2] cycloaddition
    N. Huber, R. Li, C.T.J. Ferguson, D.W. Gehrig, C. Ramanan, P. Blom, K. Landfester, K.A.I. Zhang
    Catalysis Science and Technology 2020 10 2092-2099 DOI:10.1039/d0cy00016g


    22. 2019

  22. Visible Light-Mediated Conversion of Alcohols to Bromides by a Benzothiadiazole-Containing Organic Photocatalyst
    R. Li, D.W. Gehrig, C. Ramanan, P. Blom, F.F. Kohl, M. Wagner, K. Landfester, K.A.I. Zhang
    Advanced Synthesis and Catalysis 2019 361 3852-3859 DOI:10.1002/adsc.201900416


    23. 2018

  23. Temperature dependence of the photo- and electroluminescence of poly(p-phenylene vinylene) based polymers
    I. Rörich, A.-K. Schönbein, D. Mangalore, A. Halda Ribeiro, C. Kasparek, C. Bauer, N. Crăciun, P. Blom, C. Ramanan
    J. Mater. Chem. C 2018 6 10569-10579 DOI:10.1039/C8TC01998C


  24. Energy dissipation mechanisms in the FCPb light-harvesting complex of the diatom Cyclotella meneghiniana
    H. Elnour, L. Dietzel, C. Ramanan, C. Büchel, R. van Grondelle, T.P.J. Krüger
    Biochim. Biophys. Acta 2018 1859 1151-1160 DOI:10.1016/j.bbabio.2018.07.009


  25. Assymetric Covalent Triazine Framework for Enhanced Visible-Light Photoredox Catalysis via Energy Transfer Cascade
    W. Huang, J. Byun, I. Rörich, C. Ramanan, P. W. M. Blom, H. Lu, D. Wang, L. Caire da Silva, R. Li, L. Wang, K. Landfester, K. A. I. Zhang
    Angew. Chemie Int. Ed. 2018 57 8316-8320 DOI:10.1002/anie.201801112


  26. Electron donor-free photoredox catalysis via an electron transfer cascade by cooperative organic photocatalysts
    L. Wang, I. Rörich, C. Ramanan, P.W.M. Blom, W. Huang, R. Li and K. A. I. Zhang
    Catal. Sci. Technol. 2018 8 3539-3547 DOI:10.1039/C8CY01072B


  27. Enhanced photoluminescence of a carbon dot system through surface interaction with polymeric nanoparticles
    R. Momper, J. Steinbrecher, M. Dorn, I. Rörich, S. A. Bretschneider, M. Tonigold, C. Ramanan, S. Ritz, V. Mailänder, K. Landfester and M. B. Bannwarth
    J. Colloid Interface Sci. 2018 518 11-20 DOI:10.1016/J.JCIS.2018.01.102


    28. 2009-2017

  28. Controlled Morphology of ZnO Nanorods for Electron Transport in Squaraine Bulk-Heterojunction Solar Cells with Thick Active Layers
    A. Peukert, L. Vaillant Roca, M. Scherer, R. Lovrincic, C. Ramanan, A. Chanaewa and E. von Hauff
    Sol. RRL 2017 1700132 DOI:10.1002/solr.201700132


  29. Displacement of polarons by vibrational modes in doped conjugated polymers
    M. Anderson, C. Ramanan, C. Fontanesi, A. Frick, S. Surana, D. Cheyns, M. Furno, T. Keller, S. Allard, U. Scherf, D. Beljonne, G. D’Avino, E. von Hauff and E. Da Como
    Phys. Rev. Mater. 2017 1 055604 DOI:10.1103/PhysRevMaterials.1.055604


  30. Evidence for coherent mixing of excited and charge-transfer states in the major plant light-harvesting antenna, LHCII
    C. Ramanan, M. Ferretti, H. van Roon, V. I. Novoderezhkin and R. van Grondelle
    Phys. Chem. Chem. Phys. 2017 19 22877-22886 DOI:10.1039/c7cp03038j


  31. Interplay between Long-Range Crystal Order and Short-Range Molecular Interactions Tunes Carrier Mobility in Liquid Crystal Dyes
    N. Tchamba Yimga, C. Ramanan, H. Borchert, J. Parisi, H. Untenecker, P. Kirsch and E. Von Hauff
    ACS Appl. Mater. Interfaces 2017 9 6228-6236 DOI:10.1021/acsami.6b14715


  32. Controlling Charge Carrier Overlap in Type-II ZnSe/ZnS/CdS Core–Barrier–Shell Quantum Dots
    K. Boldt, C. Ramanan, A. Chanaewa, M. Werheid and A. Eychmüller
    J. Phys. Chem. Lett. 2015 6 2590-2597 DOI:10.1021/acs.jpclett.5b01144


  33. The Role of Exciton Delocalization in the Major Photosynthetic Light-Harvesting Antenna of Plants
    C. Ramanan, J. M. Gruber, P. Malý, M. Negretti, V. I. Novoderezhkin, T. P. J. Krüger, T. Mančal, R. Croce and R. van Grondelle
    Biophys. J. 2015 108 1047-1056 DOI:10.1016/j.bpj.2015.01.019


  34. Excitation Energy Transfer within Covalent Tetrahedral Perylenediimide Tetramers and Their Intermolecular Aggregates
    C. Ramanan, C. H. Kim, T. J. Marks and M. R. Wasielewski
    J. Phys. Chem. C 2014 118 16941-16950 DOI:10.1021/jp500475c


  35. Exploring the mechanism(s) of energy dissipation in the light harvesting complex of the photosynthetic algae Cyclotella meneghiniana
    C. Ramanan, R. Berera, K. Gundermann, I. H. M. van Stokkum, C. Büchel and R. van Grondelle
    Biochim. Biophys. Acta 2014 1837 1507-1513 DOI:10.1016/j.bbabio.2014.02.016


  36. Singlet Exciton Fission in Polycrystalline Thin Films of a Slip-Stacked Perylenediimide
    S. W. Eaton, L. E. Shoer, S. D. Karlen, S. M. Dyar, E. A. Margulies, B. S. Veldkamp, C. Ramanan, D. A. Hartzler, S. Savikhin, T. J. Marks and M. R. Wasielewski
    J. Am. Chem. Soc. 2013 135 14701-14712 DOI:10.1021/ja4053174


  37. Competition between Singlet Fission and Charge Separation in Solution-Processed Blend Films of 6,13-Bis(triisopropylsilylethynyl)-pentacene with Sterically-Encumbered Perylene-3,4:9,10-bis(dicarboximide)s
    C. Ramanan, A. L. Smeigh, J. E. Anthony, T. J. Marks and M. R. Wasielewski
    J. Am. Chem. Soc. 2012 134 386-397 DOI:10.1021/ja2080482


  38. Synthesis, characterization, and photoinduced electron transfer properties of core-functionalized perylene-3,4:9,10-bis(dicarboximide)s with pendant anthracenes
    S. Ando, C. Ramanan, A. Facchetti, M. R. Wasielewski and T. J. Marks
    J. Mater. Chem. 2011 21 19049-19057 DOI:10.1039/C1JM13397G


  39. Photophysics and Redox Properties of Rylene Imide and Diimide Dyes Alkylated Ortho to the Imide Groups
    J. E. Bullock, M. T. Vagnini, C. Ramanan, D. T. Co, T. M. Wilson, J. W. Dicke, T. J. Marks and M. R. Wasielewski
    J. Phys. Chem. B 2010 114 1794-1802 DOI:10.1021/jp908679c


  40. Designed Bithiophene-Based Interfacial Layer for High-Efficiency Bulk-Heterojunction Organic Photovoltaic Cells. Importance of Interfacial Energy Level Matching
    A. W. Hains, C. Ramanan, M. D. Irwin, J. Liu, M. R. Wasielewski and T. J. Marks
    ACS Appl. Mater. Interfaces 2010 2 175-185 DOI:110.1021/am900634a


  41. Ultrafast Intersystem Crossing and Spin Dynamics of Photoexcited Perylene-3,4:9,10-bis(dicarboximide) Covalently Linked to a Nitroxide Radical at Fixed Distances
    E. M. Giacobbe, M. Qixi, M. T. Colvin, B. Cohen, C. Ramanan, S. Yeganeh, T. J. Marks, M. A. Ratner, M. R. Wasielewski, Q. X. Mi, M. T. Colvin, B. Cohen, C. Ramanan, A. M. Scott, S. Yeganeh, T. J. Marks, M. A. Ratner and M. R. Wasielewski
    J. Am. Chem. Soc. 2009 131 3700-3712 DOI:10.1021/Ja808924f