Highly soluble metal-organic polymers based on iron(II) clathrochelates and their gelation induced by sonication. (October 2017)

• Record Type: Journal Article
• Authors: Alameddine, Bassam; Shetty, Suchetha; Anju, Rajamohanan Sobhana; Al-Sagheer, Fakhreia; Al-Mousawi, Saleh
• Is Part Of: European polymer journal. Volume 95(2017)
• Page Start: 566
• Page End: 574
• Publication Date: 2017-10
• Subjects: Inorganic polymer -- Polycondensation -- Gels -- GPC -- ESCA/XPS; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; Polymerization; Polymers; Periodicals; Electronic journals; 547.705
• DOI: 10.1016/j.eurpolymj.2017.08.049
• Languages: English
• ISSNs: 0014-3057

Abstract

Graphical abstract: Synthesis of polymers from iron(II) clathrochelates end-capped with 9, 9-dialkyl fluorene-2, 7-diborate is reported. Organogels were made from polyclathrochelates in organic solvents of low and medium polarity. Highlights: Synthesis of soluble organometallic polymers using iron(II) clathrochelate units. Polymers were characterized using GPC, NMR, XPS, and UV–Vis spectroscopy. Gelation was induced by brief sonication of 10 wt% polymer in specific solvents. SEM reveals the formation of swollen fibrous microstructural networks. Clathrochelate structure offers the possibility to tune the polymer lipophilicity. Abstract: A series of clathrochelate polymers are reported by reacting iron(II) chloride with 9, 9-dialkyl fluorene-2, 7-diboronic acid and various vicinal dioxime units. The novel polymers were fully characterized by 1 H and 13 C nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), X-ray photoelectron spectroscopy (XPS), and UV–Vis absorption spectroscopy. The linearly-linked 2D organometallic polymers form oragnogel from 10 wt% concentrations in organic solvents of low and medium polarity.