Ligand-tuning of the Excitation Wavelength of a Solid State E/Z Isomerization: [Zn(TA)2(2,2́-bipyridyl)] in a Supramolecular Framework

Shao Liang Zheng, Milan Gembicky, Marc Messerschmidt, Philip Coppens

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The single-crystal-to-single-crystal (SCSC) E→Z photoisomerization of TA in the supramolecular solid CECR-[Zn(TA)2(bpy)]-H2 (CECR = C-ethylcalixresorcinarene, HTA= tiglic acid, andbpy = 2,2́bipyridine, is induced by 458 nm light, indicating a red-shift of the photo-active wavelength on introduction of the aromatic bpy ligand compared with the previously studied reaction of CECR-[Zn(TA)2(H 2O)2]4H2O. Theoretical calculations show that the initial excitation involves the bipyridyl ligand, which acts as an intramolecular photosensitizer for the isomerization process. The reaction is topotactic and illustrated by photodifference maps.

Original languageEnglish (US)
Pages (from-to)16-21
Number of pages6
JournalJournal of the Chinese Chemical Society
Volume56
Issue number1
DOIs
StatePublished - Jan 1 2009
Externally publishedYes

Fingerprint

2,2'-Dipyridyl
Isomerization
Tuning
Single crystals
Ligands
Photoisomerization
Wavelength
Photosensitizing Agents
tiglic acid

Keywords

  • E/z isomerization reaction
  • Ligand-tuning
  • Photocrystallography
  • Supramolecular framework

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Ligand-tuning of the Excitation Wavelength of a Solid State E/Z Isomerization : [Zn(TA)2(2,2́-bipyridyl)] in a Supramolecular Framework. / Zheng, Shao Liang; Gembicky, Milan; Messerschmidt, Marc; Coppens, Philip.

In: Journal of the Chinese Chemical Society, Vol. 56, No. 1, 01.01.2009, p. 16-21.

Research output: Contribution to journalArticle

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AB - The single-crystal-to-single-crystal (SCSC) E→Z photoisomerization of TA in the supramolecular solid CECR-[Zn(TA)2(bpy)]-H2 (CECR = C-ethylcalixresorcinarene, HTA= tiglic acid, andbpy = 2,2́bipyridine, is induced by 458 nm light, indicating a red-shift of the photo-active wavelength on introduction of the aromatic bpy ligand compared with the previously studied reaction of CECR-[Zn(TA)2(H 2O)2]4H2O. Theoretical calculations show that the initial excitation involves the bipyridyl ligand, which acts as an intramolecular photosensitizer for the isomerization process. The reaction is topotactic and illustrated by photodifference maps.

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