Influence of size and nature of the aryl diborate spacer on the intrinsic microporosity of Iron(II) clathrochelate polymers. (29th August 2018)

• Record Type: Journal Article
• Authors: Baig, Noorullah; Shetty, Suchetha; Al-Mousawi, Saleh; Al-Sagheer, Fakhreia; Alameddine, Bassam
• Is Part Of: Polymer. Volume 151(2018)
• Page Start: 164
• Page End: 170
• Publication Date: 2018-08-29
• Subjects: Polymer synthesis -- Molecular engineering -- Polycondensation -- Polymers of intrinsic microporosity -- Iron(II) clathrochelate -- Adsorption; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; 547.7
• DOI: 10.1016/j.polymer.2018.07.069
• Languages: English
• ISSNs: 0032-3861

Abstract

Abstract: New polyclathrochelate derivatives were obtained using the mild one-step polycondensation reaction of an iron(II) center chelated to three polar furil dioxime side groups and doubly capped with various aryl diborate central spacers. Nitrogen adsorption measurements of the polychlathrochelates (PCL1-4 ) reveal a strong correlation between the intrinsic microporosity and the nature of aryl diborate spacer whose small size (PCL1 ) or contorted structure (PCL2 ) afford polymers with Brunauer-Emmett-Teller (BET) surface areas of ∼396 m 2 /g and ∼275 m 2 /g, respectively. On the other hand, the BET surface area of the polymer diminishes either when the aryl diborate spacer has free rotation axes (PCL3 ) or a laterally extended aromatic structure (PCL4 ). Graphical abstract: Image 1 Highlights: New polymers based on iron(II) clathrochelate chelated to polar furil dioximes. Polymers are doubly capped with aryl diborate spacers of different size and nature. The small sized/contorted diborate spacers diclose BET surface areas up 396 m 2 /g. Longitudinally and laterally stretched aryl diborates reduce the BET surface area. Polar furil dioxime chelates suggest selective gas adsorption/metal-ions storage.