Zhang, Geping; Lu, Dandan; Yin, Keyang; Godbert, Nicolas; Dong, Renhao; Li, Hongguang; Hao, Jingcheng published an article in 2022, the title of the article was Alkylated, naphthalimide-containing ionic compounds with rich thermotropic behaviour and nonlinear optical response.Recommanded Product: 5036-48-6 And the article contains the following content:
Chem. functionalization of è?conjugated units plays a key role in fine tuning their supramol. organizations and functions. Herein, five 1,8-naphthalimide derivatives were prepared where the naphthalimide moiety was attached to the imidazolium ring through a Pr linker. On the other side, the imidazolium ring was modified with either a branched aliphatic chain of 2-ethyl-hexyl (C2C6, 1), 2-hexyl-decyl (C6C10, 2) and 2-decyl-tetradecyl (C10C14, 3), or a linear aliphatic chain of octyl (C8, 1é? and hexadecyl (C16, 2é?. Temperature-dependent structural evolution of these alkylated, naphthalimide-modified imidazolium bromides (abbreviated to a-NaphImiBrs hereafter) were investigated in detail by differential scanning calorimetry and small-angle X-ray scattering measurements as well as polarized optical microscopy observations. The compound with the shortest branched aliphatic chain (1) self-organized into a columnar oblique (Colo) phase at room temperature, which changed to a columnar rectangular (Colr) phase upon heating. In comparison, its counterpart with a linear aliphatic chain of the same carbon number (1é? formed a crystal at room temperature, which shifted to a Colo phase at elevated temperature The compound with a medium branched aliphatic chain (2) showed a columnar hexagonal (Colh) organization at room temperature, which changed to a smectic (Sm) phase upon heating. Compounds with longer aliphatic chains (2é? 3), regardless of whether branched or linear, only exhibit the Sm phase. Films of a-NaphImiBrs formed at room temperature were subjected to evaluations for their nonlinear optical (NLO) responses where reverse saturated absorption was observed in all the cases. It was found that 2 showed the best NLO response with a third order nonlinear absorption coefficient of up to 0.49 cm W-1. The experimental process involved the reaction of N-(3-Aminopropyl)-imidazole(cas: 5036-48-6).Recommanded Product: 5036-48-6
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Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem