The word "helicene" is a compound word made up of "helix" and "cene", with the "c" being pronounced as "s". In phonetic transcription, "helicene" is written as /ˈhɛlɪsiːn/. The first syllable is pronounced with an "eh" sound, as in the word "bet". The second syllable is pronounced with a long "e" sound, as in the word "see". Finally, the last syllable is pronounced with an "in" sound, as in the word "win". Overall, "helicene" is a word that combines familiar sounds in a unique way.
Helicene is a term used in chemistry to describe a type of organic compound consisting of a polycyclic aromatic hydrocarbon (PAH) molecule that adopts a helical or spiral structure. The molecule of helicene contains a series of fused benzene rings, typically four or more, arranged in a twisted helix formation.
The name "helicene" is derived from the combination of "helix" and "cene," which is a suffix used to describe aromatic hydrocarbons. The unique helical structure of helicenes arises from the presence of nonplanar carbon atoms within the molecule, which introduce a twisted or curved conformation. This structural arrangement imparts distinct optical and electronic properties to helicenes, making them both intriguing and important in various fields of research.
Helicenes exhibit chiral properties, meaning that they possess two non-superimposable mirror-image forms (enantiomers). This chirality makes helicenes valuable in catalysis, molecular recognition, and medicinal chemistry. Additionally, helicenes have been investigated for their application in organic electronics and as materials for advanced technological devices due to their unique electronic properties.
Although naturally occurring helicenes are scarce, chemists have developed various methods to synthesize these compounds in the laboratory. The synthesis of helicenes often requires multi-step procedures and can be challenging due to their intricate structure. Nonetheless, the development of new synthetic methodologies and the exploration of helicenes' properties hold significant promise for future scientific advancements.
The word "helicene" is derived from the combination of two terms: "helic-" and "-ene".
1. "Helic-" is derived from the Greek word "helix", which means spiral or coil. This is because helicenes have a distinct helical or twisted structure.
2. "-ene" is used as a suffix in organic chemistry to indicate unsaturated hydrocarbons with double bonds between carbon atoms. It is derived from the Greek word "hênos", meaning empty or void, as double bonds create empty spaces in the carbon chain.
Combining these two parts, "helicene" refers to a family of organic compounds with a helical structure, characterized by the presence of double bonds within the carbon chain.