12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > New 3D supramolecular Zn(II)-coordinated self-a...
View graph of relations

« Back

New 3D supramolecular Zn(II)-coordinated self-assembled organic networks

Research output: Contribution to journalJournal article

Published

  • Zheng Bang Lim
  • Hairong Li
  • Shuangyong Sun
  • Jun Yan Lek
  • Abbie Trewin
  • Yeng Ming Lam
  • Andrew C. Grimsdale
Journal publication date7/04/2012
JournalJournal of Materials Chemistry
Journal number13
Volume22
Number of pages14
Pages6218-6231
Original languageEnglish

Abstract

New 3D supramolecular networks S1 and S2 were prepared by Zn(II) coordination of the tetraphenylmethane-based p-type and n-type molecules bearing four terpyridine ligands. XRD and BET results indicate they are relatively amorphous and non-porous with a high degree of interpenetration within the networks. These could be disassembled by adding more Zn(II) ions and reassembled to form extended 3D networks S3-6 by inserting linear n-type or p-type linking units. BET data suggests that these expanded networks are more porous than the original networks S1-2, but the low porosity and surface area suggest a high degree of interpenetration remains within the expanded networks. The optical properties of these materials were compared to the linear polymers P1-3 made by Zn(II)-mediated assembly of the same linear linking units. The emission spectra of both the 3-D and 1-D cases with the same linking unit matched each other, confirming the incorporation of the linker units into the expanded assemblies. This shows that metal-ligand mediated self-assembly can be used to make two component systems in which the optical properties can be tuned by selection of the units. The assembly was also performed in the presence of CdSe nanocrystals to form nanocomposites.