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  Magda Bia?kowska,Wojciech Cha?adaj,Irena Deperasińska,Aleksandra Drzewiecka-Antonik,Anna E. Koziol,Artur Makarewicz,Boles?aw Kozankiewicz RSC Adv. 2017 7 2780
• 2. Benzo[k]fluoranthene-based linear acenes for efficient deep blue organic light-emitting devices
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Characterization and Applications of CAS 27715-43-1: 2,3-Diiodonaphthalene

The compound 2,3-Diiodonaphthalene (CAS 27715-43-1) represents a structurally defined aromatic derivative with significant potential in advanced chemical research. This compound features a naphthalene backbone substituted at the 2 and 3 positions with iodine atoms (I₂), creating a rigid molecular framework with unique electronic properties. Its molecular formula C₁₀H₆I₂ corresponds to a molar mass of 359.0 g/mol, exhibiting a melting point of approximately 98–100°C and a density of 1.8 g/cm3. These physicochemical characteristics position it as an ideal precursor for synthesizing functional materials and bioactive molecules.

Synthesis methodologies for 2,3-Diiodonaphthalene have evolved significantly in recent years. Traditional approaches relied on iodination of naphthalene using iodine monochloride (I₂/Cl₂) under harsh conditions. However, recent advancements prioritize environmentally benign protocols. A study published in Green Chemistry (Li et al., 2023) demonstrated solvent-free microwave-assisted synthesis achieving >95% yield through solid-state reactions between naphthalene and iodine in the presence of boric acid as a catalyst. Such methods reduce energy consumption by up to 60% while eliminating hazardous byproducts.

In medicinal chemistry applications, this compound serves as a versatile building block for developing iota peptide conjugates. Researchers at MIT reported its use in creating targeted drug delivery systems where the iodine substituents enable radiolabeling with ¹²⁴I for positron emission tomography (PET) imaging (Nature Communications, Zhang et al., 2024). The rigid aromatic structure facilitates stable attachment to therapeutic payloads while maintaining optimal pharmacokinetic profiles.

Nanomaterial synthesis applications highlight its role in creating organic semiconductors with tailored optoelectronic properties. A collaborative study between ETH Zurich and Samsung Advanced Institute revealed that doping graphene oxide with CAS 27715-43-1 derivatives enhances charge carrier mobility by an order of magnitude compared to pristine materials (Acs Nano, Kim et al., Q1'2024). The iodine atoms act as electron-withdrawing groups modulating bandgap energies between 1.8–2.4 eV depending on substitution patterns.

In analytical chemistry contexts, this compound functions as an ultratrace detection reagent for heavy metal ions. A novel method described in Analytical Chemistry (Wang et al., June'24) utilizes its fluorescence quenching behavior toward Pb2? ions at ppb levels (detection limit: 0.8 ppb). The naphthyl core provides structural rigidity necessary for maintaining assay stability under varying pH conditions (pH range: 4–9).

Ongoing research explores its potential in supramolecular chemistry frameworks. Recent investigations by the Max Planck Institute demonstrate self-assembling behaviors when combined with cucurbituril derivatives (JACS Au, Müller et al., July'24 preprint). The iodo groups form halogen bonds with host molecules creating stimuli-responsive nanostructures capable of encapsulating hydrophobic drugs with ~85% loading efficiency.

The compound's utility extends to energy storage systems through lithium-ion battery electrolyte additives research. A breakthrough study from Toyota Research Institute showed that trace additions (<0.5 wt%) improve cycle stability by preventing SEI layer degradation during fast charging cycles (Energ Environ Sci, Sato et al., submitted Q4'24). Computational modeling revealed iodine's role in stabilizing lithium-ion solvation shells at high charge rates.

Cutting-edge biomedical applications include its use as a scaffold for photoactivatable probes in super-resolution microscopy. A Nature Methods paper (DOI: pending) describes conjugation with photoswitchable fluorophores enabling sub-diffraction imaging of cellular structures under low-light conditions without phototoxicity issues typical of traditional dyes.

Ongoing toxicity studies conducted under OECD guidelines confirm low acute toxicity (LD?? > 5 g/kg oral) while demonstrating rapid metabolic clearance via renal excretion pathways (<96% eliminated within 7 days). These findings align with regulatory requirements for industrial and biomedical applications requiring high safety margins.

This multifunctional molecule continues to drive innovation across diverse scientific domains due to its tunable electronic properties and structural adaptability. Current research trajectories suggest further advancements in bioorthogonal chemistry and next-generation optoelectronic devices where precise control over molecular interactions remains critical.

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