# COF-LZU1: an imine COF that holds palladium

> COF-LZU1 condenses 1,3,5-triformylbenzene with p-phenylenediamine into imine-linked layers that stack eclipsed, so the imine nitrogens of neighbouring layers line up. A simple post-treatment loads Pd(II) into the framework. The resulting Pd/COF-LZU1 catalyses Suzuki–Miyaura cross-coupling across a broad range of aryl halides and boronic acids in 96–98% yield, and stays stable and easy to recycle.

- Page: https://www.labcanvas.com/templates/covalent-organic-frameworks/cof-lzu1-pd-suzuki-coupling-catalysis
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- Updated: 2026-10-14
- Category: Covalent organic frameworks
- Method: Imine COF catalysis, bottom-up
- Starting materials: 1,3,5-Triformylbenzene (TFB) and p-phenylenediamine (PDA); a Pd(II) salt for the post-treatment
- Product: COF-LZU1 (imine-linked, eclipsed 2D layers) and Pd/COF-LZU1
- Key result: Yields of 96–98% across a broad range of reactants; high stability and easy recycling (Ding et al. 2011)
- Figure: 1920 × 1080 px, 80 editable layers (12 generated objects with settings)

## Steps

1. **Imine condensation**: TFB + PDA: C=N links join the building blocks into honeycomb layers
2. **Eclipsed layers**: Layers stack in register, so imine N atoms of adjacent layers face each other
3. **Pd loading**: A simple post-treatment incorporates Pd(II) into the framework
4. **Catalysis**: Suzuki–Miyaura coupling of aryl halides with arylboronic acids: 96–98% yields, broad scope
5. **Reuse**: The catalyst is stable and easily recycled (Ding et al. 2011)

## Strengths

- Ordered, accessible Pd sites in a porous solid
- Separated and reused by filtration
- Easily prepared

## Limitations

- Imine links can hydrolyse in strong acid
- Pd leaching has to be checked on every reuse

## Uses

- Cross-coupling in fine-chemical synthesis
- A model for metal sites in COFs

## References

1. Ding et al., “Construction of Covalent Organic Framework for Catalysis: Pd/COF-LZU1 in Suzuki–Miyaura Coupling Reaction”, J. Am. Chem. Soc. 2011. https://doi.org/10.1021/ja206846p (primary)
2. Waller, Gándara & Yaghi, “Chemistry of Covalent Organic Frameworks”, Acc. Chem. Res. 2015. https://doi.org/10.1021/acs.accounts.5b00369 (review)
3. Geng et al., “Covalent Organic Frameworks: Design, Synthesis, and Functions”, Chem. Rev. 2020. https://doi.org/10.1021/acs.chemrev.9b00550 (review)

Credit: After Ding et al., JACS 2011 (doi:10.1021/ja206846p) and Waller, Gándara & Yaghi, Acc. Chem. Res. 2015 (doi:10.1021/acs.accounts.5b00369). Pd drawn between the imine N of adjacent layers as a model; layer spacing as drawn.

## Questions

**What does the “COF-LZU1: an imine COF that holds palladium” template show?** COF-LZU1 condenses 1,3,5-triformylbenzene with p-phenylenediamine into imine-linked layers that stack eclipsed, so the imine nitrogens of neighbouring layers line up. A simple post-treatment loads Pd(II) into the framework. The resulting Pd/COF-LZU1 catalyses Suzuki–Miyaura cross-coupling across a broad range of aryl halides and boronic acids in 96–98% yield, and stays stable and easy to recycle.

**What are the steps shown in “COF-LZU1: an imine COF that holds palladium”?** 1. Imine condensation: TFB + PDA: C=N links join the building blocks into honeycomb layers. 2. Eclipsed layers: Layers stack in register, so imine N atoms of adjacent layers face each other. 3. Pd loading: A simple post-treatment incorporates Pd(II) into the framework. 4. Catalysis: Suzuki–Miyaura coupling of aryl halides with arylboronic acids: 96–98% yields, broad scope. 5. Reuse: The catalyst is stable and easily recycled (Ding et al. 2011).

**What are the starting materials and the product?** Starting materials: 1,3,5-Triformylbenzene (TFB) and p-phenylenediamine (PDA); a Pd(II) salt for the post-treatment. Product: COF-LZU1 (imine-linked, eclipsed 2D layers) and Pd/COF-LZU1.

**Which papers is “COF-LZU1: an imine COF that holds palladium” based on?** Ding et al., “Construction of Covalent Organic Framework for Catalysis: Pd/COF-LZU1 in Suzuki–Miyaura Coupling Reaction”, J. Am. Chem. Soc. 2011 (doi:10.1021/ja206846p); Waller, Gándara & Yaghi, “Chemistry of Covalent Organic Frameworks”, Acc. Chem. Res. 2015 (doi:10.1021/acs.accounts.5b00369); Geng et al., “Covalent Organic Frameworks: Design, Synthesis, and Functions”, Chem. Rev. 2020 (doi:10.1021/acs.chemrev.9b00550).

**Can I edit the “COF-LZU1: an imine COF that holds palladium” template?** Yes. Open it in the LabCanvas editor: all 80 layers are editable, including 12 generated objects (structures, plots, equipment) with their own settings. Change the text, colours and layout, then export PNG, TIFF, SVG or PDF.

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