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 † ).

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...

2024年11月1日 · The full spectrum analysis of XPS showed that compared with APP, the content of C element on the surface of TAPP was significantly increased, while the content of N element was significantly reduced. This was because the content of C element in DA and TA was high, and TA on the surface of TAPP did not contain N element.

2021年3月15日 · In this work, a monomer-mediated in situ growth strategy was developed for the controllable construction of core-shell Co 3 O 4@TAPB-DMTP−COF composite (TAPB, 1,3,5-tris (4-aminophenyl)benzene; DMTP, 2,5-dimethoxyterephaldehyde; COF, covalent organic framework), which exhibits uniform size, high surface area, outstanding thermochemical stability...

2024年11月9日 · COF-based photothermal membrane is designed with TAPP-SQ nanosheet arrayed architecture. TAPP-SQ nanosheet array reduces water evaporation enthalpy by photothermal Marangoni effect. TAPP-SQ nanosheet array and …

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.

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。 Co/Ni形成了相对自旋轨道耦合，电子自发地由N和Ni向Co位点转移。

创新的醌-胺连接共价有机框架dhbq-tapp-cof，通过直接结合2,5-二羟基-1,4-苯醌和胺单体合成，具有卓越的光催化铀还原性能，在无需牺牲剂的条件下实现超过98%的铀回收率。

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.