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Updated: Nov 8, 2025

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
Published on: February 6, 2020
Base- and Metal-Dependent Self-Assembly of Lathanide-Organic Coordination Polymers or Macrocycles with Tetradentate
Xiao-Shan Feng1,2, Xiao-Zhen Li2, Shao-Jun Hu2,3
1College of Chemistry and Material Science, Fujian Normal University, Fuzhou, 350007, P. R. China.
Abstract:
Herein, we report a comprehensive study on the lanthanide-directed coordination self-assembly with two bis-tetradentate acylhydrazone ligands H4 L1 and H4 L2 . Multifarious outcomes, which are base- and metal-dependent, were revealed by NMR, ESI-TOF-MS and X-ray crystallography. In the absence of base, bent H4 L1 was assembled into dinuclear double-strand helicate Ln2 (H2 L1 )2 by partially-deprotonated assembly with La, Sm or Eu, while trinuclear Ln3 (H2 L1 )3 with Yb or Lu. For linear H4 L2 , infinite 1D zig-zag metal-organic polymeric chain (Ln2 H2 L2 )n was obtained. However, complete deprotonated L1 and L2 assembled into discrete trinuclear Ln3 (L1 /2 )3 and tetranuclear Ln4 (L1 /2 )4 macrocyclic structures under the basic condition. For these, there are multiple possible isomers coexisting in the solution which were enumerated and simulated with molecular mechanic modeling. Visible-light sensitized NIR emissions on the Yb complexes have been observed, endowing them potential application in photofunctional materials.
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