Tesfay G. Ashebr

Tesfay G. Ashebr

Assistant Professor of Inorganic Chemistry | PhD in Inorganic Chemistry

About Me

Welcome to my personal website! I am Tesfay G. Ashebr, a passionate researcher and Assistant Professor of Inorganic Chemistry at Addis Ababa Science and Technology University. Currently a postdoc researcher at Gottingen University.

Selected Paper

  • Charge separation enhancement of triple-phase Ag3PO4-AgI-ZnO heterojunction for dye photodegradation.
  • Hydrazones, hydrazones-based coinage metal complexes, and their biological applications.
  • Novel polyvinyl alcohol-assisted MnO2–ZnO–CuO nanocomposites as an efficient photocatalyst for methylene blue degradation from wastewater.
  • Impact of Ligand Substituents on the Spiral Arrangement in Glutarohydrazide-Based Binuclear-Iron(II) Helicates.
  • Counter Ions in Tuning the Extended Arrangements of Pyrazolone- thiosemicarbazone-based Fe(III) Complexes.
  • Edaravone-Based Mononuclear Dysprosium(III) Single-Molecule Magnets.
  • Bis-pyrazolone-based dysprosium(iii) complexes: zero-field single-molecule magnet behavior in the [2 × 2] grid DyIII4 cluster.
  • Emerging Trends on Designing High-Performance Dysprosium(III) Single-Molecule Magnets.
  • Chiral All-Nitrogen-Coordinated Dysprosium Single-Molecule Magnets.
  • Aggregation-Induced Emission and Single-Molecule Magnet Behavior of TPE-Based Ln(III) Complexes.
  • Self-Assembly of Lanthanide Crescent-Like and Macrocyclic Clusters from Versatile o-Vanillin-Based Ligands.
  • Hydrazone based spin crossover complexes: Behind the extra flexibility of the hydrazone moiety to switch the spin state.
  • LC–NMR for Natural Product Analysis: A Journey from an Academic Curiosity to a Robust Analytical Tool.
  • Lanthanide-Based Single-Molecule Magnets Derived from Schiff Base Ligands of Salicylaldehyde Derivatives.
  • Mono and binuclear cobalt(II) mixed ligand complexes containing 1,10-phenanthroline and adenine using 1,3-diaminopropane as a spacer: synthesis, characterization, and antibacterial activity investigations
  • Spin-crossover in iron(ii)-Schiff base complexes.
  • A C-Doped TiO2/Fe3O4 Nanocomposite for Photocatalytic Dye Degradation under Natural Sunlight Irradiation.
  • Recent advances in and potential utilities of paper-based electrochemical sensors: beyond qualitative analysis.
  • Kinetics on Thermal Decomposition of Iron(III) Complexes of 1,2-Bis(Imino-4’-Antipyrinyl)Ethane with Varying Counter Anions.
  • Synthesis, Spectroscopic, Structural Characterization, Conductivity and Electrochemical Studies of a Schiff Base Ligand and Its Copper Complexes.
  • A comparative thermal decomposition kinetics on 1,2-bis(imino-4'-antipyrinyl)ethane and 4-N-(4'-antipyrylmethylidene)aminoantipyrine Cu(II) complexes with varying counter anions.
  • Ligand Field and Counter Anion Effects on the Thermal Stability of Copper(II) Complexes of 1,2-Di(imino-4’-antipyrinyl)ethane and 4-N-(4’-antipyrylmethylidene) aminoantipyrine.
  • Levels of Selected Essential and Nonessential Metals in Roasted Coffee Beans of Yirgacheffe and Sidama, Ethiopia.

    • Current Project

    Project Title:Opto-Magnetically Active Metal Complexes & Coordination Chemistry-Driven Materials

    1. Introduction and Motivation

    The intersection of coordination chemistry and functional materials enables the rational design of molecular systems with tunable optical and magnetic responses. Opto-magnetically active metal complexes—compounds whose properties can be modulated by light, magnetic fields, or both—offer a unified platform for innovations in catalysis, chemical sensing, separations technology, and biomedicine. This project develops a coherent design-to-function pipeline that links ligand/metal selection, structure–property relationships, and device-level performance.

    2. Scope & Key Concepts

    2.1 Opto-Magnetic Activity

    2.2 Coordination Chemistry-Driven Materials

    Metals may include 3d (Fe, Co, Ni, Cu), 4d/5d (Ru, Ir), and lanthanides (Eu, Tb, Gd) chosen for redox flexibility, spin multiplicity, and photophysics. Ligands span N-, O-, P-donors; π-extended scaffolds; photochromic azobenzenes; and chiral/bioconjugatable motifs to interface with living systems.

    3. Application Domains

    3.1 Catalysis

    3.2 Sensing

    3.3 Separation

    3.4 Biological Activities

    4. Research Objectives

    1. Design and synthesize families of opto-magnetically active complexes with tunable spectra and spin states.
    2. Construct coordination-driven materials (MOFs, polymers, films) that retain molecular function in the solid state.
    3. Establish quantitative structure–property relationships linking coordination geometry to optical/magnetic outputs.
    4. Demonstrate catalytic, sensing, separation, and bioactivity benchmarks against state-of-the-art comparators.
    5. Prototype device-level implementations (photoreactors, sensor chips, membranes) and evaluate real-world conditions.

    5. Methodology

    5.1 Design & Synthesis

    5.2 Characterization

    5.3 Functional Testing

    5.4 Integration & Data

    6. Safety, Ethics & Sustainability

    7. Milestones & Deliverables

    1. M1: Ligand library & in-silico screening report.
    2. M2: Synthesis of lead complexes; optical/magnetic baselines.
    3. M3: First-generation materials (MOFs/films) with retained function.
    4. M4: Application demos (catalysis, sensing, separation, bio assays) with KPIs.
    5. M5: Prototype devices and scalability assessment; data & methods repository.

    8. Expected Contributions & Impact

    9. Risks, Dependencies & Mitigation

    10. Conclusion

    By uniting molecular-level coordination design with materials engineering, this project targets a versatile class of opto-magnetically active systems that can be tuned for catalysis, sensing, separation, and biomedical functions. The integrated workflow—from computation to device—aims to deliver both fundamental insights and deployable prototypes.

    Contact Me