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Description
TCI D3903 1,2-Dimethyl-3-propylimidazolium Iodide, commonly abbreviated as DMPII, is an ionic liquid salt built on an imidazolium cation paired with iodide as the anion. It belongs to the family of ionic liquids — organic salts that melt at relatively low temperatures and exhibit extremely low vapour pressure. In the laboratory, DMPII is best known as a principal electrolyte component in dye-sensitized solar cells (DSSC), where the iodide/triiodide redox couple regenerates the dye molecules after electron injection has taken place, allowing the photoelectrochemical cycle to continue.
The properties that make this compound a preferred choice begin with its good ionic conductivity, combined with high thermal and chemical stability. Methyl substitution at position 2 of the imidazolium ring blocks deprotonation at the most acidic carbon, so the cation becomes more resistant to basic conditions and remains more stable throughout long-term device operation. Its very low vapour pressure reduces the risk of electrolyte leakage and evaporation — a classic problem for electrolytes based on volatile organic solvents. The iodide anion simultaneously supplies the ion source needed to form the redox couple without requiring an additional salt.
In Indonesian laboratories, DMPII is typically encountered in university and institutional research groups working on renewable energy materials, photovoltaics, and electrochemistry. It is used in DSSC fabrication studies, electrolyte formulation work, and materials characterization programmes where reproducible ionic liquid quality matters. Research teams also employ it in electrochemistry teaching and thesis projects, where a well-defined, low-volatility ionic medium simplifies handling and improves consistency between experimental runs.
Laboratory Applications
Dye-sensitized solar cell electrolytes — DMPII supplies the iodide required for the iodide/triiodide redox couple that regenerates oxidized dye molecules after electron injection into the semiconductor.
Ionic liquid electrolyte formulation — its low vapour pressure lets researchers build liquid electrolytes that resist evaporation and leakage far better than conventional volatile organic solvent systems.
Electrochemical research and redox studies — good ionic conductivity allows the compound to serve as both conductive medium and ion source in electrochemical measurement setups.
Photovoltaic device stability testing — the 2-methyl substitution blocks deprotonation at the most acidic ring carbon, supporting cation stability during extended device operation and long-term ageing trials.
Specialty synthesis and materials chemistry — as an imidazolium-based ionic liquid, it serves laboratories exploring low-melting organic salts as reaction media or functional material components.
Chemical Class: Imidazolium-based ionic liquid (iodide salt)
Pack Sizes: Available in standard TCI research packaging; please confirm the pack size required when ordering
Storage: Keep in a tightly closed container, protected from light and moisture
Handling and Storage
Store TCI D3903 in its original tightly closed container in a cool, dry place away from direct sunlight, since iodide salts are sensitive to light and to atmospheric moisture. Amber glass or the manufacturer's supplied packaging is suitable; keep containers sealed between uses to limit moisture uptake, which can affect electrolyte performance. Handle the material in a well-ventilated area or fume hood, wearing safety glasses, gloves, and a laboratory coat. Avoid contact with skin and eyes, and avoid generating aerosols. Use clean, dry spatulas and glassware during transfer, and keep the compound away from strong oxidizing agents. Dispose of residues and contaminated materials in accordance with institutional chemical waste procedures, and always consult the manufacturer's safety data sheet before first use.
