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Open research questions in Metal complexes synthesis and properties

98 unresolved questions extracted from the limitations and future-work sections of 497 Metal complexes synthesis and properties papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • One of the challenges is the need for a simple and fast method for detecting lead(II) ions. Another challenge is the need for a method that is accurate and reliable. The paper also faces the challenge of optimizing the analytical parameters, such as pH and hydroxide ion concentration.

    A Simple and Fast Method for the Determination of Lead(II) Ions in Some Cosmetic Products Through Spectrophotometric Technique by Using Thiosemicarbazone-Linked Substituted Indole-2-one · 2026 · DOI

  • There is a need for a simple and fast method for detecting lead(II) ions in cosmetic products. Prior methods may be expensive, time-consuming, or inaccurate.

    A Simple and Fast Method for the Determination of Lead(II) Ions in Some Cosmetic Products Through Spectrophotometric Technique by Using Thiosemicarbazone-Linked Substituted Indole-2-one · 2026 · DOI

  • There is a need to develop metal-based agents that can bypass resistance and improve tumor selectivity in hepatocellular carcinoma. The current therapeutic options for advanced disease are limited.

    Rhenium(I) tricarbonyl complexes with 1,10-phenanthroline derivatives: potential anticancer agents for hepatocellular carcinoma · 2026 · DOI

  • to evaluate should aim in vivo pharmacokinetics, biodistribution, and therapeutic efficacy of this its potential synergy with established complex, as well as chemotherapeutic or photodynamic agents. Elucidating the molecular targets and binding interactions at the mitochondrial and nuclear levels will further elucidate the precise mechanisms underlying its selective anticancer activity.

    Rhenium(I) tricarbonyl complexes with 1,10-phenanthroline derivatives: potential anticancer agents for hepatocellular carcinoma · 2026 · DOI

  • However, the structural basis by which metal coordination modulates DOX-DNA association remains poorly understood.

    Integrated Computational and Spectroscopic Analyses to unravel the Role of Cu(II) Coordination in Modulating Doxorubicin-DNA Binding · 2026 · DOI

  • Interestingly, the anticancer potential of prodrugs based on picoplatin is widely underexplored, and even less so the respective tumor-targeting approaches.

    Exploring the Structure–Activity Relationships of Albumin-Targeted Picoplatin-Based Platinum(IV) Prodrugs · 2025 · DOI

  • Despite the extensive data set, some gaps remain as some cancer types are underrepresented, and the mechanism(s) of action of the Ru(II)-based cytotoxic agents is(are) not yet fully understood.

    Exploring the toxicity of mononuclear piano-stool Ru(II) anticancer agents: A comprehensive literature review · 2025 · DOI

  • Still, the development of half-sandwich organometallic cobalt complexes remains scarcely explored.

    Exploiting Co(III)-Cyclopentadienyl Complexes To Develop Anticancer Agents · 2024 · DOI

  • Further development of compound 26 as an anticancer agent. Investigation of the biological mechanisms of thiosemicarbazones in more detail. Design and synthesis of new thiosemicarbazones with improved anticancer activity.

    Multifaceted biological and computational assessment of aromatic and N-heteroaromatic non-substituted thiosemicarbazones · 2026 · DOI

  • The biological mechanisms and pharmacokinetic behavior of thiosemicarbazones remain insufficiently characterized. There is a need for the development of new anticancer agents with improved activity and selectivity.

    Multifaceted biological and computational assessment of aromatic and N-heteroaromatic non-substituted thiosemicarbazones · 2026 · DOI

  • There is a need for the development of novel pharmaceutical agents based on thiazole derivatives. The current study aims to address this gap by synthesizing and characterizing a 5-methylthiazole-based Schiff base and its metal chelates.

    Structure elucidation and evaluation of the antimicrobial and antitumor activities of 5-methylthiazole-based Schiff base and its metal chelates · 2026 · DOI

  • Only four metal ions (Mn(II), Cu(II), Cd(II), and Zr(IV)) were investigated; exploration of other transition metals and their chelate complexes with this ligand system remains unexplored.

    Structure elucidation and evaluation of the antimicrobial and antitumor activities of 5-methylthiazole-based Schiff base and its metal chelates · 2026 · DOI

  • Accurate treatment of metalloproteins remains a challenging task in simulation studies. The use of polarization effects in MD simulation is computationally demanding. The study of GNA properties requires a detailed understanding of its dynamic behavior.

    Conformational, molecular, spectral and binding properties of Zn(II)-coordinated glycol nucleic acid monophosphate: a DFT, docking and molecular dynamics assessment · 2026 · DOI

  • Future studies can investigate the experimental validation of the computational findings. Research can focus on the application of GNA in synthetic biology, biotechnology, medicinal chemistry, and nanotechnology. Further studies can explore the use of other computational methods and models to investigate GNA properties.

    Conformational, molecular, spectral and binding properties of Zn(II)-coordinated glycol nucleic acid monophosphate: a DFT, docking and molecular dynamics assessment · 2026 · DOI

  • There is a need to synthesize and characterize new Schiff base ligands and their metal complexes. There is a need to investigate the nonlinear optical properties and antibacterial activity of these complexes.

    Synthesis, characterization, computational and biological investigation of Co(II), Ni(II) and Cu(II) complexes with 2-hydroxy-1-naphthaldehyde derived Schiff base ligand · 2026 · DOI

  • There is a need to synthesize and characterize new metal complexes with antioxidant properties. There is a lack of understanding of the geometries and electronic properties of Ni(II) complexes.

    Synthesis, Experimental and Theoretical (DFT) Characterization, Electrochemical Behavior, Antioxidant Evaluation, and Molecular Docking of New Ternary Ni(II) Complexes of Dimethylglyoxime and Some Amino Acids · 2026 · DOI

  • Further investigation of the potential of imine-copper(II) and zinc(II) complexes as anticancer agents. Evaluation of the toxicity of these complexes in vivo. Investigation of the mechanisms of action of the complexes.

    Comparative reactivity studies of imine-copper(II) and zinc(II) complexes containing both oxindole and benzimidazole scaffolds for biomolecules and tumor cells · 2026 · DOI

  • The lack of understanding of the biological potential of ceftiofur-based drugs. The need for further research on the coordination chemistry of cephalosporin antibiotics.

    Synthesis, Spectroscopic Characterization, Antioxidant Activity, and Molecular Docking Studies of Novel Ceftiofur-Based Metal Complexes · 2026 · DOI

  • Future research could focus on the synthesis and characterization of more oxidozirconium(IV) hydroxamate complexes. Future research could investigate the antimicrobial activity of these complexes in more detail.

    Synthesis, characterization, computational chemistry and biological studies of oxidozirconium (IV) hydroxamate complexes · 2026 · DOI

  • There is a need to synthesize and characterize new oxidozirconium(IV) hydroxamate complexes. There is a need to determine the antimicrobial potential of these complexes.

    Synthesis, characterization, computational chemistry and biological studies of oxidozirconium (IV) hydroxamate complexes · 2026 · DOI

  • The study aims to fill the gap in understanding the properties of Cu(II) complexes with amino acids. The study seeks to elucidate the coordination behavior between Cu(II) ions and glutamic acid ligands.

    Probing the structure and molecular docking of a Cu(II)-glutamic acid complex as a metallodrug agent using spectroscopic, electrochemical and theoretical studies · 2026 · DOI

  • The need for earth-abundant and low-cost metal-based systems with tunable electronic structures and photophysical properties. The limited understanding of the relationship between ligand substitution and photophysical properties in Cu(I) complexes. The lack of Cu(I) complexes with functionalized dipyridylamine ligands and DPEphos.

    Toward Photoactivatable Copper(I) Anticancer Agents: Heteroleptic Cu(I) Complexes with Functionalized Dipyridylamine Ligands · 2026 · DOI

  • The growing resistance of microorganisms to available antimicrobial drugs. The limited use of cisplatin and its analogues due to side effects and tumor resistance. The need to determine the Minimal Inhibitory Concentration (MIC) and Minimal Bactericidal/Fungicidal Concentration (MBC/MFC) of the palladium(II) complex.

    Immunomodulatory and Antimicrobial Effects of Pd(II)-Pincer-Type Complex · 2026 · DOI

  • The study does not provide a comprehensive toxicological profile of the Pd(II) complex. The study is limited to in vitro experiments. The study does not investigate the long-term effects of the Pd(II) complex.

    Immunomodulatory and Antimicrobial Effects of Pd(II)-Pincer-Type Complex · 2026 · DOI

  • There is a need to develop new technologies for the removal of ciprofloxacin from water bodies. The high aqueous solubility and chemical stability of ciprofloxacin make it resistant to biodegradation.

    Assessing Zn12O12 nanocage for the elimination of ciprofloxacin from drinking water using DFT simulations · 2026 · DOI

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98 open questions have been extracted from the limitations and future-work passages of 497 Metal complexes synthesis and properties papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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