Blue- and white-light-emitting 2D-coordination polymers and their solid-state photodimerization reaction

Abdul Malik P. Peedikakkal, Almaz S. Jalilov, Abdul Rajjak Shaikh, Abdul Nasar Kalanthoden, Abdulaziz A. Al-Saadi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Two Pb(II) coordination polymers (CPs), namely [Pb(μ-bpe)(μ-O2CCH3)2]n (1) and [Pb(μ-bpe)(μ-O2CH)2]n (2), have been isolated from the reaction of Pb(OAc)2·3H2O with 1,2-bis(4-pyridyl)ethene (bpe) in the presence of acetate and formate anionic ligands, respectively. Compounds 1 and 2 formed 2D sheet-like structures, constructed by bridging acetate and formate carboxylate ligands. The bpe ligand containing the olefinic C[double bond, length as m-dash]C bonds was perfectly brought to the proximity of Schmidt topolochemical criteria for 2. The 2D sheet in 2 underwent 67% of the photodimerization reaction in the solid state, while the 2D sheet in 1 was photochemically stable. Therefore, the photochemical reactivity of 1 and 2 was rationalized based on the orientation of the olefinic C[double bond, length as m-dash]C bonds, which was brought close to each other due to the distinct bridging of the carboxylates and the Pb(II) metal ions. The room temperature solid-state photoluminescence (PL) revealed that compound 1 exhibited a near white-light emission and the blue-light emission for 2 upon excitation at 365 nm. The differences in the emission of the two 2D-sheets were correlated with the bridging carboxylate ligands.
Original languageEnglish (US)
JournalCRYSTENGCOMM
DOIs
StatePublished - Oct 6 2020

Bibliographical note

KAUST Repository Item: Exported on 2021-11-03
Acknowledgements: A. M. P. Peedikakkal would like to acknowledge the support provided by the Deanship of Scientific Research (DSR) at King Fahd University of Petroleum & Minerals (KFUPM) for funding this work through project No. DF191031. A. M. P. Peedikakkal is also grateful to Prof. Jagadese J. Vittal, National University of Singapore for helpful discussions.

ASJC Scopus subject areas

  • General Materials Science
  • General Chemistry
  • Condensed Matter Physics

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