Important notes about presentations
The exact times of poster presentations by sessions when authors should be present is listed in the programme below. All of the posters should be mounted on Monday between 16:00 and 17:00, and dismounted on Thursday between 17:40 and 18:00.
The poster dimensions should not exceed the A0 format which is max. 85 cm in width and 120 cm in height (portrait orientation).
For speakers, the suggested PowerPoint slide ratio is 16:9, however other ratios will be accepted if necessary. Please note, the presentations will be shown from the conference computers with Windows and MS Office. The presenters will be asked to deliver their presentations in time. Showing presentation from presenter's personal notebook will be allowed only exceptionally and may introduce technical problems and delays. Alternatively, the presentations converted to pdf will also be accepted.
The poster dimensions should not exceed the A0 format which is max. 85 cm in width and 120 cm in height (portrait orientation).
For speakers, the suggested PowerPoint slide ratio is 16:9, however other ratios will be accepted if necessary. Please note, the presentations will be shown from the conference computers with Windows and MS Office. The presenters will be asked to deliver their presentations in time. Showing presentation from presenter's personal notebook will be allowed only exceptionally and may introduce technical problems and delays. Alternatively, the presentations converted to pdf will also be accepted.
PROGRAMME
16:00 – 18:00 | REGISTRATION | ||
18:00 – 20:00 | Welcome reception |
8:00 – 8:45 | REGISTRATION | ||
8:45 – 09:15 | Opening | ||
| Chair: Thorsten Bach Technische Universität München | |||
09:15 – 10:15 | PL1 | David MacMillan, Princeton University, The Development of Photocatalytic Reactions of Value to Chemists and Biologists | ||
10:15 – 10:30 | Golden sponsor’s lecture | ||
10:30 – 11:15 | Coffee break | ||
| Chair: Thorsten Bach Technische Universität München | Chair: Dominik Wöll RWTH Aachen University | Chair: Jiani Ma Shaanxi Normal University, Xi’an |
|
11:15 – 11:45 | IL1 | Kirsten Zeitler, Leipzig University, Photocatalytic Strategies for the Activation of Strong Bonds | IL2 | Eléna Ishow, Nantes University, CNRS, Photoactuation at the nanoscale as a tool to probe local matter cohesion | IL3 | Kyungwon Kwak, Korea University, Fast Scan Two-Dimensional Infrared Spectroscopy for reactive systems Sponsored by: Light Conversion |
11:45 – 12:05 | OP1 | Dario M. Bassani, Univ. Bordeaux, CNRS, Coupling water oxidation with nitrogen reduction | OP2 | A. Lewandowska-Andralojc, Adam Mickiewicz University, Hybrid Porphyrin Systems on 2D Materials and Ferromagnets: Linking Structure with Excited-State Dynamics | OP3 | Sara Hernandez Mejias, IMDEA Nanoscience, Protein blueprints for quantum light control |
12:05 – 12:25 | OP4 | Tero-Petri Ruoko, Tampere University, Photochemical n-Doping of Organic Semiconductors | OP5 | Diptiranjan Paital, King’s College London, Hot-Electron Injection and Photothermal Effects at Plasmonic Metal-Metal & Metal-Semiconductor Heterojunctions | OP6 | Min-Hsien (Tony) Kao, University of Bristol, Probing Surface-Induced Fluorescence Dynamics in Microdroplets Using Time-Resolved Fluorescence Spectroscopy |
12:25 – 14:00 | Lunch break | ||
| Chair: Anna Gudmundsdottir University of Cincinnati | Chair: Ludovic Troian-Gautier UCLouvain | Chair: Tahei Tahara RIKEN |
|
14:00 – 14:30 | IL4 | Jayaraman Sivaguru, Bowling Green State University, Developing a Photochemical Clock: Engineering Excited States to Dictate the Mode (Energy vs Electron Transfer) of Photocatalysis Sponsored by: Magnitude Instruments | IL5 | Elke Debroye, KU Leuven, Shedding Light on Perovskite: Pathways to Stability and Efficiency in Optoelectronics | IL6 | Toshinori Suzuki, Kyoto University, Twisted Ground-State Intermediates and Reaction of Pyrimidine Nucleic Acid Bases in Aqueous Solution |
14:30 – 14:50 | OP7 | Cornelia Bohne, University of Victoria, Codifying Complexity and Emergent Properties in Cucurbit[n]uril-guest Systems using Fluorescence | OP8 | Christian Metzen, RWTH Aachen University, Far-red photocontrol of supramolecular crosslinks in stimuli-responsive microgels | OP9 | Jörn Manz, Freie Universität Berlin, Photo-driven Electronic Chirality Flip in 37 Attoseconds |
14:50 – 15:10 | OP10 | Uwe Pischel, University of Huelva, Photoswitchable Heteroaryl-Iminothioindoxyls: Tuning of Optical Properties and Thermal Back Isomerization | OP11 | Virginia Martínez-Martínez, Universidad del País Vasco-EHU, Comparing Silica, Nanoclay and Cellulose Nanocarriers for Targeted Photodynamic Inactivation of Gram-Negative Bacteria | OP12 | H. Larsson, Chalmers University of Technology, Dynamic Dimers of Thiophene-Functionalized Pentacene Derivatives – Platform for Tunable Singlet Fission in Solution |
15:10 – 15:40 | Coffee break | ||
| Chair: Axel G. Griesbeck University of Cologne | Chair: Benedetta Carloti University of Perugia | Chair: Stefanie Tschierlei Technische Universität Braunschweig |
|
15:40 – 16:00 | OP13 | E. Bassan, University of Basel, Anti-Kasha behaviour in an open-shell photosensitizer | OP14 | Azilis Desaize, Université Paris-Saclay, Microscale Force Sensors in Microfluidic Chips based on Polydiacetylenes Mechanofluorochromism | OP15 | Marek Sikorski, Adam Mickiewicz University in Poznań, Tuning Flavin Acid–Base Equilibria for Visible-Light Photoreactivity |
16:00 – 16:20 | OP16 | Eva Bednářová, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Light-Driven Catch-and-Release Chemistry with Quinone Allides | OP17 | Giulia Pancotti, Institut de Ciència de Materials de Barcelona, Tuning Excited-State Dynamics in DPP Dimers: Role of Distance and Torsional Freedom in Electronic Coupling | OP18 | Ashley J. Shin, University of California, Los Angeles, Narrow optical transitions in molecules for quantum applications |
16:20 – 16:30 | St1 | Max Dietel, Universität Regensburg, Photocatalytic denitrative homo- and cross-coupling of nitroalkanes towards the synthesis of alkenes | St2 | Kenji Kamada, Comenius University, Measuring threshold excitation intensity of a TTA-UC system by snapshots of the emission images | St3 | David Mužík, Masaryk University, Revisiting Excimer Formation in 1-Methylnaphthalene: Evidence for Ground-State Prearrangement |
16:30 – 16:40 | St4 | Nieves P. Ramirez Hernandez, Saarland University, Eosin Y Disproportionation Promoted Alkene Hydrofunctionalizations in Fluorinated Assemblies | St5 | Cansu Köse, Université de Haute-Alsace, Two-Photon Induced Initiating Strategy based on Multipolar Phenanthroline-Based Ruthenium Complexes | St6 | Alexander P. Golovanov, The University of Manchester, Application of NMRtorch for in situ illumination of NMR samples to study diverse photo-activated systems |
17:00 – 19:00 | Posters Photocatalysis Single Molecule Spectroscopy Photobiology and Photomedicine |
8:45 – 09:00 | Sponsor lecture (Luzchem) | ||
| Chair: Cornelia Bohne University of Victoria | |||
9:00 – 09:45 | PL2 | Anna Gudmundsdottir, University of Cincinnati, From Reactive Intermediates to Photodynamic Crystals: How Crystal Packing Directs Light-Induced Chemical and Mechanical Responses | ||
09:45 – 10:30 | PL3 | María Luisa Marín García, Universitat Politècnica de València, Supported Multifunctional Photocatalysts for Water, Energy, and Health Applications | ||
10:30 – 11:15 | Coffee break | ||
| Chair: Jayaraman Sivaguru Bowling Green State University | Chair: Matthew J. Fuchter University of Oxford | Chair: Nikola Basarić Ruđer Bošković Institute, Zagreb |
|
11:15 – 11:45 | IL7 | Zhiwei Zuo, Shanghai Institute of Organic Chemistry, Illuminating Inert Bonds: LMCT Catalysis at the Frontiers of Sustainable Chemistry | IL8 | Grace G. D. Han, University of California, Santa Barbara, Photoswitching for Energy Storage and Release: From Concept to High Energy Density Fuels | IL9 | Stefania Impellizzeri, Toronto Metropolitan University, Integrating Metal-Enhanced Fluorescence into Mainstream Photocatalysis and Bioimaging: A Paradigm Change for the Chemist’s and Biologist’s Toolkits Sponsored by: Luzchem |
11:45 – 12:05 | OP19 | Malkanthi Karunananda, Saint Louis University, Bimetallic Copper Photosensitizers with Metal-Metal Interactions: Synthesis, Characterization, Electronic Structure & Reactivity Studies | OP20 | Claudia Bizzarri, University of Rome Tor Vergata, The Curious Case of Two Cu(I) regioisomers: How Tautomerism Shapes Photoelectrochemical Behaviour | OP21 | Cristian A. Strassert, University of Münster, From photoluminescence and photoacoustic spectroscopy towards multiscale-multimodal bioimaging, temperature and oxygen sensing with tailored transition metal complexes |
12:05 – 12:25 | OP22 | Paola Ceroni, University of Bologna, Thermally Activated Delayed Fluorescence: kinetics of quenching and impact of cage escape in photocatalytic processes | OP23 | Mateusz Brzeziński, Institute of Physical Chemistry, Polish Academy of Sciences, Beyond Diffusion: Low-Power Photon Upconversion in COFs | OP24 | Isabelle Leray, Université Paris-Saclay, A rapid boar taint sensor based on fluorescence |
12:25 – 14:00 | Lunch break | ||
| Chair: Petr Klán Masaryk University | Chair: Stephan Landgraf TU Graz | Chair: Cristian A. Strassert University of Münster |
|
14:00 – 14:30 | IL10 | Jiani Ma, Shaanxi Normal University, Xi’an, Development and Reaction Mechanism Studies on Photocages | IL11 | Jillian Dempsey, University of North Carolina, Photophysics and Photochemistry of d5 Coordination Complexes with Ligand-to-Metal Charge Transfer Excited States | IL12 | Oliver Thorn-Seshold, Technical University of Dresden, Photostabilised fluorophores & NIR-actuated photoswitches |
14:30 – 14:50 | OP25 | Pavel Müller, University of Paris-Saclay, Beyond Hydrocarbon Production: New Mechanistic Insights and Synthetic Potential of Fatty Acid Photodecarboxylase | OP26 | Océane Baffoy, Nantes Université, Dye-sensitized Photoelectrochemical Cells promoting Alcohol-to-Aldehyde Conversion in Aqueous Solution using DPP-TEMPO | OP27 | Katarina Zlatić, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Photocatalytic Oxidation and Reduction of Hexaphenylethane Redox Switches: Switching vs Oxygen-Mediated Pathway |
14:50 – 15:10 | OP28 | Kei Ohkubo, The University of Osaka, Light-driven Polymer Surface Oxygenation with Chlorine Dioxide | OP29 | Michael S. Eberhart, New Jersey Institute of Technology, Self-Assembly of Molecular Architectures for Efficient Energy Conversion | OP30 | Ksenija Glušac, Argonne National Laboratory, Data-Driven Discovery of Structure–Reactivity Relationships in Oxidative Addition at Zerovalent Nickel Centers |
15:10 – 15:40 | Coffee break | ||
| Chair: Kirsten Zeitler Leipzig University | Chair: Denis Fuentealba Pontificia Universidad Católica de Chile | Chair: Irena Škorić University of Zagreb Faculty of Chemical Engineering and Technology |
|
15:40 – 16:00 | OP31 | Aniruddha Sarkar, Lund University, Decarboxylative Giese Addition and C-S Bond Formation by Iron-based Photocatalyst | OP32 | Tomasz Pedzinski, Adam Mickiewicz University in Poznan, Structural effects on the reactivity of model disulfides toward singlet oxygen and one-electron oxidants | OP33 | Manabu Abe, Hiroshima University, Spin-switching Strategy for Efficient Photo-induced Drug Delivery |
16:00 – 16:20 | OP34 | Simone Stegbauer, Technische Universität München, Chromophore Activation by Lewis Acid Coordination – Novel Photoreactions of Carbonyl Compounds | OP35 | Nils Oberhof, Heinrich Heine University Düsseldorf, Light-driven Molecular Motors Modulating DNA | OP36 | Erick L. Bastos, University of São Paulo, Natural Chromophores as Scaffolds for Molecular Design |
16:20 – 16:30 | St7 | Carla Aira-Rodríguez, Universidade de Santiago de Compostela, Reductive couplings via nucleophilic photoactivation of carbonyls | St8 | Jesús Lucia-Tamudo, University of Vienna, Ibuprofen: An ally with hidden intentions? | St9 | Marta Dudek, Wroclaw University of Science and Technology, Controlling DNA with Light: Photoswitches Meet G-Quadruplexes |
16:30 – 16:40 | St10 | M.-S. Bertrams, Johannes Gutenberg University Mainz, Harnessing Triplets: From Quenching Pathway Control and Upconversion to Energy Transfer-Induced Photocyclization | St11 | Agata Tyszka-Gumkowska, ENSEMBLE3 Sp. z o.o., Unlocking Solid-State Emission in COFs through Chemical and Structural Design | St12 | Lina M. Romero, Pontificia Universidad Católica de Chile, Biotin-funcionalized cucurbit[7]uril as a supramolecular delivery system for demethylated toluidine blue in photodynamic therapy |
17:00 – 19:00 | Posters Photochemical Reactions Mechanisms and Intermediates Frontiers in Photophysics and Spectroscopy (and Ultrafast Spectroscopy) Molecular Sensing and Imaging | ||
19:00 – 20:00 | EPA General Assembly | ||
20:00 | EPA Reception |
8:45 – 09:00 | Sponsor lecture (N2 Photonics) | ||
| Chair: Manabu Abe Hiroshima University | |||
9:00 – 09:45 | PL4 | Sherri A. McFarland, University of Texas, Arlington, Light, Metal, and Medicine: From Molecular Design to Clinical Development | ||
09:45 – 10:30 | PL5 | Leticia González, University of Vienna, Nonadiabatic Dynamics Simulations Across Timescales | ||
10:30 – 11:15 | Coffee break | ||
| Chair: Leticia González University of Vienna | Chair: Đani Škalamera University of Zagreb Faculty of Science | Chair: Silvije Vdović Institute of Physics, Zagreb |
|
11:15 – 11:45 | IL13 | Nađa Došlić, Ruđer Bošković Institute, Trajectory-Based Modeling of Excited-State Dynamics and Ultrafast Spectroscopy | IL14 | Tomislav Rovis, Columbia University, Redshifting Photoredox Catalysis Sponsored by: Advion Interchim Scientific / BIA d.o.o. | IL15 | Tobias Brixner, Universität Würzburg, What can we learn from higher-order ultrafast spectroscopy? Sponsored by: PicoQuant |
11:45 – 12:05 | OP37 | Marc de Wergifosse, Université Catholique de Louvain, All‐atom quantum mechanics methodologies to evaluate excited states and response properties of realistic systems | OP38 | Golo Storch, Technical University of Munich, Catalysis with Photochemically Excited Flavins | OP39 | Peter W McDonald, Université Paris-Saclay, Mechanochromic and long-lived luminescent organic materials for information encryption |
12:05 – 12:25 | OP40 | Giacomo Londi, University of Pisa, The catalytic cycle of a fatty acid photodecarboxylase from a multiscale QM/MM approach | OP41 | Cui Wang, University of Konstanz, Photocatalysis sensitized by luminescent iron complexes | SPONSOR PRESENTATION – Malek Ibrahim, Redeem Technologies |
12:25 – 14:00 | Lunch break | ||
| Excursions |
8:45 – 09:00 | Sponsor lecture (Light conversion) | ||
| Chair: Ksenija Glušac Argonne National Laboratory | |||
9:00 – 09:45 | PL6 | Gonzalo Cosa, McGill University, Visualizing and exploiting redox processes in biology and biomaterials: working at the intersection of photochemistry and fluorescence imaging | ||
09:45 – 10:30 | PL7 | Hans Jakob Wörner, ETH Zürich, Resolving coupled electronic and structural dynamics with attosecond pulses | ||
10:30 – 11:15 | Coffee break | ||
| Chair: Gonzalo Cosa McGill University | Chair: Grace G. D. Han University of California, Santa Barbara | Chair: Hans Jakob Wörner ETH Zürich |
|
11:15 – 11:45 | IL16 | Tahei Tahara, RIKEN, Visualization of Isomerizing Molecules in the Excited State by Femtosecond Raman Spectroscopy Sponsored by: Edinburgh Instruments | IL17 | Matthew J. Fuchter, University of Oxford, The conformation and connectivity of azoarene photoswitches (and why you should care) Sponsored by: Ocean Optics / LRM d.o.o. | IL18 | Stefanie Tschierlei, Technische Universität Braunschweig, Photochemistry under Sunlight: Cu(I) Complexes with extended π-systems Sponsored by: n2 Photonics |
11:45 – 12:05 | OP43 | Alexandre Fürstenberg, University of Geneva, Fluorescence lifetime sensors for single-molecule and super-resolution imaging | OP44 | Tomáš Šolomek, University of Amsterdam, Photochemical Fe2+ Uncaging in Ferrocene-[n]Cycloparaphenylenes: A Photomechanophore Paradigm | OP45 | Valentine I. Vullev, University of California, Riverside, Stepping out of the Static Notions for Dipoles and Solvation |
12:05 – 12:25 | OP46 | Dominik Wöll, RWTH Aachen University, Single Molecule Rotation in Thin Polymer Films probed with High Depth Accuracy via a Combination of Metal-induced Energy Transfer and Defocused Widefield Imaging | OP47 | Ludovic Troian-Gautier, UCLouvain, Energy, Charge, and Spin: Design Principles for Modern Photosensitizers | OP48 | Ricardo J. Fernández-Terán, University of Geneva, Ultrafast Multidimensional Spectroscopies: A Window into Proton-Coupled Electron Transfer and its Control |
12:25 – 14:00 | Lunch break | ||
| Chair: Alexandre Fürstenberg University of Geneva | Chair: María Luisa Marín García Universitat Politècnica de València | Chair: Eléna Ishow Nantes University |
|
14:00 – 14:20 | OP49 | Daria Larowska-Zarych, Institute of Physical Chemistry, Polish Academy of Sciences, Supramolecular Control of Hotspot Accessibility in SERS Detection of Thionine | OP50 | Chen-Ho Tung, Chinese Academy of Sciences, Beijing , Semiconductor Quantum Dots as Photocatalysts for Green Synthetic Photochemistry | OP51 | Sanat Kumar Mahankudo, Institute of Physical Chemistry, Polish Academy of Sciences, Light in the Sinister Photophysics of Gold Nanoclusters |
14:20 – 14:40 | OP52 | Tetsuo Yamaguchi, Kwansei Gakuin University, Crystalline size dependence on energy transfer from perovskite nanocrystal to organic dye | OP53 | Raúl Pérez-Ruiz, Universitat Politècnica de València, Chemical Transformations Enabled by Biphotonic Processes in Open-to-Air Environment | OP54 | Gabriel Glotz, Masaryk University, Redefining the Phototruncation Mechanism of Heptamethine Cyanine |
14:40 – 15:00 | OP55 | Dimitra Markovitsi, Université Paris-Saclay, CNRS, Photoactivated dynamics of electronic relaxation in guanine nanostructures | OP56 | Nikola Topolovčan, Ruđer Bošković Institute, Illuminating Molecular Complexity | OP57 | Debkumar Rana, 1Max Born Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Real-Time Observation of Azide Bond Fission and Nitrene Formation: Time-resolved UV/MIR and Soft X-ray Absorption Spectroscopy |
15:00 – 15:10 | St13 | N. Quadrio, Università degli Studi di Milano, Electrochemilumiluminescent (ECL) Iridium complexes for bio-sensing applications | St14 | Amiri Shibata, Hiroshima University, Reactivity of Photoexcited State of a Halogen-free Trityl Radical Derivative | St15 | Liselotte C. Nass, University of Melbourne, The Inter- and Intramolecular Interactions in Singlet Fission |
15:10 – 15:20 | St16 | Marina Tranfić Bakić, University of Split, Tuning Sugar Binding Affinity of Phenylboronic Acid with Light | St17 | Demmy M. Yu, Technical University of Munich, Total Synthesis of Albiflorin by a Photochemical Key Step | St18 | Evan G. Moore, The University of Queensland, Synergistic Hetero-TTA: Fact or Fiction? |
15:40 – 17:40 | Posters Photochemistry in Material Science Light Energy Conversion Computational Photochemistry | ||
19:00 | Gala Dinner |
| Chair: Valentine I. Vullev University of California, Riverside | Chair: Raúl Pérez-Ruiz Universitat Politècnica de València | Chair: Nađa Došlić Ruđer Bošković Institute |
|
9:00 – 9:30 | IL19 | Benedetta Carlotti, University of Perugia, Aggregation-Induced Singlet Fission in para-Azaquinodimethane Push-Pull Compounds Under the Gaze of Ultrafast Spectroscopy | IL20 | M. Laura Dántola, INIFTA, Universidad Nacional de La Plata -CONICET, From Light Absorption to Protein Dysfunction: Photosensitized Damage Mediated by Endogenous Sensitizer of Biomedical Relevance | IL21 | Henrik Ottosson, Uppsala University, Excited-State Antiaromaticity: A Light-Induced “Mr. Hyde” Characteristic of Many Ground-State Aromatic Molecules |
9:30 – 09:50 | OP58 | Daniel H. Cruz Neto, University of Geneva, Photophysical Characterization of a Metal-Free Triazatriangulenium (TATA+) Dye for Photocatalytic Applications | OP59 | Axel G. Griesbeck, The University of Cologne, Photoactivation of artemisinin and derivatives by triplet and singlet sensitizers | OP60 | Aurélie Perrier,Université Paris Cité, From Excited States to Actuation: A Theoretical Insight into Polymeric PhotoActuators |
9:50 – 10:10 | OP61 | Anam Fatima, University of East Anglia, Time-resolved spectroscopy reveals off-to-on photoswitching mechanism in a decoupled reversibly switchable fluorescent protein | OP62 | Denis Fuentealba, Pontificia Universidad Católica de Chile, Supramolecular controllable photoactive agents for photodynamic therapy | OP63 | Bo Durbeej, Linköping University, Molecular Photogears for Transmitting Rotary Motion at the Nanoscale |
10:10 – 10:30 | OP64 | Stephan Landgraf, Graz University of Technology, Rethinking of the determination of activation energies in solution | OP65 | Susan J. Quinn, University College Dublin, DNA Light-Switch Behaviour of Chirally Resolved Tris(heteroleptic) Ru(II) Polypyridyl Complexes | OP66 | David Picconi, Heinrich Heine University Düsseldorf, Simulating the ultrafast dynamics of multi-mode multi-state molecular systems coupled to a dissipative environment |
10:30 – 11:15 | Coffee break | ||
| Chair: Dario Bassani University of Bordeaux | |||
11:15 – 12:00 | PL8 | Ryu Abe, Kyoto University, Toward Solar Hydrogen Production: Visible-Light-Induced Water Splitting via Z-scheme Photocatalysis Systems Sponsored by: Shanghai 3S Technology Co., Ltd. | ||
| Chair: Paola Ceroni University of Bologna | |||
12:00 – 12:05 | EPA Ambassador Award, Petr Klán, Masaryk University | ||
12:05 – 12:10 | EPA Best PhD Thesis Award | Luca Maria Cavinato, University of Turin, Emerging materials for light-emitting electrochemical cells toward eco-friendly optoelectronics | ||
12:10 – 12:30 | EPA Young Investigator Award | Christoph Kerzig, Johannes Gutenberg University Mainz, Using visible light as efficiently as possible – Novel strategies in photocatalysis and energy conversion E | ||
12:30 – 12:50 | EPA Best PPS Article Award | Barbara Golec, Cardinal Stefan Wyszynski University, Photophysics and photostability of porphyrinoids | ||
12:50 – 13:35 | Porter medal lecture | Leif Hammarström, Uppsala University, From Artificial Photosynthesis to Proton-Coupled Electron and Energy Transfer | ||
13:35 – 14:10 | CLOSING |
You are encouraged to use PhotoIUPAC 2026 logo in your presentations and/or posters:
(ideal for intermediate backrounds)
(ideal for very dark backrounds)
(ideal for very light backgrounds)
