Investigating the geometrical preferences of a flexible benzimidazolone-based linker in the synthesis of coordination polymers

Corey L. Jones, Elizabeth A. Marsden, Adam C. Nevin, Benson M. Kariuki, Mohan M. Bhadbhade, Adam D. Martin, Timothy L. Easun

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
7 Downloads (Pure)

Abstract

A series of new group 2 coordination polymers, MgL ={MgL(H2O)(DMF)0.75}, CaL = {CaL(DMF)2}, SrL = {SrL(H2O)0.5} and BaL = {BaL(H2O)0.5}, were synthesized using a flexible benzimidazolone diacetic acid linker (H2L) in which the two carboxylic acid binding sites are connected to a planar core via {–CH2–} spacers that can freely rotate in solution. In a ‘curiosity-led' diversion from group 2 metals, the first row transition metal salts Mn2+, Cu2+ and Zn2+ were also reacted with L to yield crystals of MnL = {MnL(DMF)(H2O)3.33}, Cu3L2 = {Cu3L2(DMF)2(CHO2)2} and ZnL = {ZnL(DMF)}. Crystal structures were obtained for all seven materials. All structures form as two-dimensional sheets and contain six-coordinate centres, with the exception of ZnL, which displays tetrahedrally coordinated metal centres, and Cu3L2, which contains square planar coordinated metal centres and Cu paddle-wheels. In each structure, the linker adopts one of two distinct conformations, with the carboxylate groups either cis or trans with respect to the planar core. All materials were also characterized by powder X-ray diffraction and thermogravimetric analysis.
Original languageEnglish
Article number171064
Pages (from-to)1-11
Number of pages11
JournalRoyal Society Open Science
Volume4
Issue number12
DOIs
Publication statusPublished - 2017
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Coordination network
  • Coordination polymer
  • Crystallization
  • Flexible linker
  • Metal
  • Organic framework

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