Fourier transform-infrared (FTIR), X-ray photoelectron spectroscopy (XPS), liquid chromatography-mass spectrometry (LCMS) and X-ray diffraction (XRD) are used to determine the structures of TH...

2024年3月16日 · In addition, X-ray photoelectron spectroscopy (XPS) measurements were carried out to evaluate the content and valence state of metals in COF-BATA-TAPP-M. The experimental values of metal content for the two COFs are 1.2 at%, which matched well with the theoretical values (Table S1 †).

We present scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) studies of porphyrin 2D-COFs grown at a solid–vapour interface. XPS shows that covalent links between porphyrins consist of a mixture of imines and hemiaminals, a non-conjugated intermediate in the Schiff-base condensation reaction.

2021年3月15日 · The results further confirmed the successful formation of crystalline TAPB-DMTP−COF shell via the imine condensation reaction. Meanwhile, characterization of Co3 O 4 -DMTP and Co 3 O 4@TAPB-DMTP−COF composite by XPS also provided convincing evidence for the imine formation through amine and aldehyde groups.

2023年6月9日 · In this study, a series of porphyrin-based COFs (TAPP-x-COF) with various transition metals (Co, Ni, Fe) were synthesized via a facile post-metallization strategy under solvothermal synthesis. The resulting porphyrin-based COFs showed oxygen reduction reaction (ORR) activity with a trend in Co > Fe > Ni.

The p-COF was synthesized using 5,10,15,20-tetra (4-aminophenyl) porphyrin (TAPP) and 1,3,6,8-tetrakis (4-formylphenyl) pyrene (TFPy) as building blocks via condensation r...

2023年1月1日 · Herein, the 5,10,15,20-tetrakis (4-aminophenyl) porphyrin nickel (Ni-TAPP) was self-assembled on the surface of carbon nanotubes (CNTs) driven by the π-π interactions via a simple, facile, scalable preparation approach.

2020年1月24日 · Design of stable, selective, and powerful electrocatalysts for CO 2 reduction reaction (CO 2 RR) is highly desirable yet largely unmet. In this work, a series of metalloporphyrin-tetrathiafulvalene...

2024年11月9日 · Using porphyrin self-assembled nanoleaves as precursors, we synthesize TAPP-SQ-M (membrane with TAPP-SQ COF composite on the surface) with a three-dimensional nanosheet array structure via a solid-liquid interface synthesis method and Schiff base condensation reaction with squaric acid.

为揭示Co/Ni金属离子在CoNi-COF-0-3中表面电子形态，我们对典型的CoNi-COF-3催化剂进行了原位XPS测试。 结果表明，金属物种加入COFs并未改变其原始价态。