Scalability gaps in Chemistry

Representative open questions

Showing 30 of 38 — one per source paper, highest-quality first.

• Ultrasound-assisted adsorption of congo red dye using green synthesized silver nanoparticles coated with chitosan (2026) · doi

  The study optimizes Chi-AgNPs dosage at 0.025 g and sonication time at 5 min for Congo Red removal, but does not systematically investigate the scalability of this ultrasound-assisted adsorption process to larger treatment volumes or evaluate the cost-effectiveness and energy requirements compared to conventional adsorption methods.

• Photochemistry and photophysics of transition metal complexes: Quantum chemistry (2015) · doi

  Multi-scale approaches combining geometry optimization, electronic state calculation, and biological environment modeling for Ru(II) polypyridyl-DNA systems are at the computational limits; the paper identifies that effective Hamiltonian techniques and electronic localization methods could improve accuracy but does not specify which specific computational strategies (basis sets, functionals, solvation schemes) should be prioritized for achieving sub-0.1 eV accuracy in DNA-bound states.

• Chitosan and radiation chemistry (2010) · doi

  The paper identifies radiation degradation, crosslinking, and grafting of chitosan as promising methods for medical and environmental applications but explicitly states most results are from basic laboratory studies; the specific gap is that scale-up pathways from laboratory synthesis to manufacturing-scale production and cost reduction strategies remain undeveloped.

• Bis (N-Heterocyclic Carbene) Palladium Complex Immobilized Onto Fe3o4@Sio2 as a Catalyst for Sonogashira (Amine/Copper Free) and Hiyama Coupling of Arbr/Cl in Green Media (2026) · doi

  The optimal reaction conditions use 20 mg of catalyst in 2 mL water; however, the paper does not evaluate scalability to gram-scale or multi-gram syntheses. Testing the heterogeneous Pd-NHC/Fe3O4@SiO2 catalyst at increased reaction volumes (10-100 mL) and substrate quantities would determine whether heat transfer limitations or mass transfer constraints arise during scale-up of Sonogashira and Hiyama coupling reactions.

• My journey in the CO2-chemistry wonderland (2017) · doi

  The production scalability of cyclic carbonates from olefins, CO2, and air is limited by the current availability of epoxides (ca. 600 kt/y using H2O2 routes) not matching commodity chemical market demands of several Mt/y. Alternative epoxide production routes with higher throughput capacity and lower cost than H2O2 oxidation must be developed and evaluated for integration with the oxidative carboxylation process.

• Organometallic Chemistry of Heterocycles (2010) · doi

  Ring expansion and ring contraction reactions have enabled preparation of metal-containing rings (closo-ruthenacyclopentadienes, ruthenabenzofuran, iridabenzothiophene, azanickelacyclopentadienes) with various substituents, but the scope and limitations of these ring-forming processes with respect to substituent electronic properties and steric demands remain incompletely defined.

• Multicomponent reactions in crop protection chemistry (2020) · doi

  The synthesis of α-aminophosphonate derivatives containing pyrimidinyl and benzothiazolyl moieties has been demonstrated at laboratory scale, but the scalability of multicomponent phosphonate reactions to industrial crop protection manufacturing processes has not been systematically evaluated.

• Flow Chemistry as a Drug Discovery Tool: A Medicinal Chemistry Perspective (2018) · doi

  The MACOS microwave-heated thin-film catalysis system (Scheme 22) achieves temperatures exceeding 900°C on copper or gold-coated capillaries for multicomponent propargyl amine synthesis, but the paper does not specify the thermal stability limits of the capillary coatings, their reusability/lifetime, temperature uniformity across the reaction zone, or applicability to other metal films (e.g., platinum, nickel).

• Flow Chemistry in Drug Discovery: Challenges and Opportunities (2021) · doi

  While the paper mentions that microfluidic cell-chips can execute 1,500 chemical combinations per day with real-time analysis, there is no investigation of how reaction scaling from microfluidic chip conditions to preparative flow reactor scales affects yield, selectivity, and consistency when using the same AI-optimized parameters.

• Water extract rice husk as an efficient catalyst to synthesis of p-thymol tailored 1,2,4-triazole sulfanyls as potential antidiabetic candidates (2026) · doi

  The rice husk water extract catalyst is employed for synthesis, but the paper does not compare catalytic efficiency, yield optimization, or sustainability metrics against conventional synthetic methods or other green catalysts for 1,2,4-triazole sulfanyl compound synthesis, limiting assessment of the proposed catalyst's practical scalability.

• Overview of some quantum effects in chemistry (2011) · doi

  The learning algorithm approach using experimental apparatus as an analog computer to solve the Schrödinger equation has demonstrated convergence for isolated molecules and limited solution-phase examples, but lacks characterization of convergence rates, robustness to measurement noise in the fluorescence signal readout, and applicability to competing reaction channels with overlapping product absorption spectra.

• Quantum effects in chemistry: seven sample situations (2011) · doi

  The application of density matrix, QM/MM, and nonequilibrium Green's function approaches to real chemical systems with full electronic structure detail and coupled quantum/classical dynamics remains computationally incomplete. Scalability of these methods to realistic molecular systems with sufficient basis set size and bath coupling fidelity is noted as a significant outstanding challenge despite advances in GPU computing and path integral methods.

• Sustainable Biginelli chemistry: Indian contributions to green multicomponent synthesis (2026) · doi

  While the phosphotungstic acid-Jeffamine hybrid catalyst demonstrated scalable DHPM synthesis in water at near-neutral pH (7.5), the paper does not specify minimum or maximum batch scale feasibility, catalyst loading optimization for industrial production, or cost-benefit analysis compared to Fe(III)/bent and IL2@Fe3O4 systems.

• Continuous Flow Chemistry in Medicinal Chemistry (2011) · doi

  The ring expansion reaction with ethyl diazoacetate in continuous flow reactors achieved 89% yield at 1.8 min residence time with 91 g/h throughput, but the paper does not investigate how varying residence time, reactor geometry, or temperature profiles affect yield and selectivity, nor does it address scale-up beyond the demonstrated throughput.

• Asymmetric Organocatalysis at the Service of Medicinal Chemistry (2014) · doi

  While enamine-catalysed organocatalytic reactions achieve gram-scale synthesis of oseltamivir, the relatively high catalyst loading and long reaction times for asymmetric organocatalysis in medicinal chemistry applications require optimization to improve practical scalability and reaction efficiency.

• Photochemical tuning of materials: A click chemistry perspective (2018) · doi

  The photochemical fixation of DNA nanoconstructs using UV irradiation (λ = 365 nm) has only been demonstrated with 80-mer cyclic DNA and 10 base pair duplexes; the scalability and efficacy of this metal-free strain-promoted click chemistry approach on larger DNA oligomeric structures (>200 nucleotides) and varying sequence complexities remain unexplored.

• Flow Chemistry in Medicinal Chemistry: Applications to <scp>Bcr</scp> ‐ <scp>Abl</scp> Kinase Inhibitors (2022) · doi

  The platform was limited to two-step reaction sequences (with optional third deprotection step); integration of longer multi-step synthesis sequences with inline intermediate workup and purification for Bcr-Abl kinase inhibitor scaffold elaboration remains out of scope and requires development of automated workup protocols.

• Precision Chemistry for Two-Dimensional Materials (2024) · doi

  Van der Waals heterostructure arrays and molecular superlattices have shown promise for optoelectronic and quantum applications, but large-scale, wafer-scale synthesis protocols that achieve consistent layer stacking order, minimized defect density, and reproducible device performance across multiple samples remain underdeveloped.

• Waste to Wheels: Bio-Diesel Synthesis from used Cooking Oil (2026) · doi

  The paper lacks discussion on the scalability of biodiesel production from UCO at an industrial level and cost-effectiveness analysis for commercial deployment.

• Phase-selective sol–gel auto-combustion synthesis of γ-Fe2O3 and Fe3O4 nanoparticles (2026) · doi

  While 19 batches were synthesized to demonstrate reproducibility and scale-up in controlled argon atmosphere, the scalability to larger production volumes and industrial-scale synthesis has not been demonstrated.

• Artificial Intelligence-Driven Development and Characterization of Nanomedicine (2026) · doi

  Real-time, closed-loop optimization systems combining AI with automated synthesis and characterization platforms need development to accelerate formulation discovery with reinforcement learning or Bayesian optimization.

• Green Chemistry, Eco-Friendly Chemistry, Biorefinery (2024) · doi

  Further realistic VOC reductions from solvents are questioned, as current emission levels have stabilized and technical optimization has reached practical limits despite continued industry efforts.

• Synthesis and spectroscopic characterization of homoleptic triorganopnictogen(III) compounds – useful precursors for functionalized materials. Molecular structure of [4-{(CH2O)2CH}C6H4]3Sb (2025) · doi

  No discussion is provided regarding the scalability of synthesis or potential industrial applications of these homoleptic triorganopnictogen(III) compounds.

• Lu2CrMnO6–Pm-g-C3N4 supported dendritic nanosilica as a recyclable green catalyst for eco-friendly synthesis of N-[(2-hydroxyethoxy)carbonyl] glycine from carbon dioxide (2026) · doi

  While the study demonstrates recyclability over ten consecutive cycles, long-term stability and performance over extended periods or in industrial-scale operations have not been investigated.

• Decoupling charge‒discharge electrolysis for hydrogen evolution and organic oxidation reactions (2026) · doi

  The experiments were performed in an open laboratory environment at controlled temperature, but scalability to industrial conditions with varying environmental parameters is not addressed.

• Life’s hidden catalyst: the Boron Theorem and the chemistry of emergence (2026) · doi

  The scalability of boron-catalyzed chemical networks from prebiotic synthesis conditions to protocell-scale systems requires further in vitro and computational validation.

• Solvent Polarity Matching for the Fabrication of Evenly Distributed Metal-Organic Framework Stationary Phases (2026) · doi

  The scalability of the solvent polarity matching approach from capillary columns to larger column formats or industrial applications has not been addressed.

• Sustainable Fabrication of Green Chemistry Silica-Carbon Composites Derived from Coconut Coir and Dicalite Using Ion Exchange Method (2026) · doi

  The study identifies pH 5 and 800°C as optimal synthesis parameters but does not explore scalability or reproducibility at larger production scales.

• Reassessing the Role of Analytical Chemistry. Improving Analytical Chemistry in South Africa (2010) · doi

  There is a need to develop capacity and resources that enable point-of-sale or production monitoring to prevent quality disasters in export products like wine.

• Flow Chemistry: New Concepts from Batch to Continuous Organic Chemistry (2016) · doi

  While commercial versatile modules for different production scales are now available, systematic guidelines for scaling up from laboratory microreactors to industrial production remain underdeveloped.