《Direct synthesis of chain-end-functionalized poly(3-hexylthiophene) without protecting groups using a zincate complex》 was published in Macromolecular Rapid Communications in 2020. These research results belong to Inagaki, Shin; Yamamoto, Takuya; Higashihara, Tomoya. Reference of 4-Iodobenzoic acid The article mentions the following:
Chain-end-functionalized poly(3-hexylthiophene)s (P3HTs) with benzyl alc. (-PhCH2OH), phenol (-PhOH), and benzoic acid (-PhCOOH) groups are directly synthesized based on the Negishi catalyst-transfer polycondensation method utilizing the zincate complex of tBu4ZnLi2. In this system, neither protection nor deprotection steps are required, and also providing a living polymerization system to control the mol. weight while maintaining a low molar mass dispersity (DM) of the obtained P3HT derivatives Indeed, the chain-end-functionalized P3HTs can be synthesized along with controlled number-average mol. weights (Mn = 5100-20 000), low DM (1.06-1.14), and high chain-end functionality (Fn = 46-86%). The Fn values for the alc. and phenol groups are found to be high (86% for-PhCH2OH and 71% for -PhOH based on 1H NMR, resp.), as also confirmed by matrix-assisted laser desorption/ionization time of flight mass spectroscopy. The easily synthesizable chain-end-functionalized P3HTs will be applicable for the facile synthesis of block and branched polymers containing P3HT as well as its related semiconducting polymer segments. In the experiment, the researchers used many compounds, for example, 4-Iodobenzoic acid(cas: 619-58-9Reference of 4-Iodobenzoic acid)
4-Iodobenzoic acid(cas: 619-58-9) belongs to organic iodides. Generally organic iodides can be divided into two classes of alkyl iodides and aryl iodides. Reference of 4-Iodobenzoic acid Typical reactions of alkyl iodides include nucleophilic substitution, elimination, reduction, and the formation of organometallics.
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com