#uv-vis

MOFs

This experiment synthesizes ZIF-8 and ZIF-67 complexes, both types of metal-organic frameworks (MOFs). Several different types of analyses were run this week to determine whether the experiment was successful.

I studied the particle sizes with SEM, solid-state UV-Vis, magnetic susceptibility, IR, X-ray diffraction, and TGA of the complexes. I have not used X-ray diffraction, solid-state UV-Vis, or SEM before, so I gained a lot from this experience.

The silver nanoparticle experiment is probably my second favorite. I enjoyed watching the solution's color change as the reaction progressed.

I was able to obtain the blue color expected for the KBr concentration, but the UV-Vis and reaction rate data did not appear correct. It's possible that the reaction was contaminated or the UV-Vis was performed incorrectly. The poor reaction rate was probably because I over-diluted my solution.

Of all the experiments this semester, this was my favorite. It was also the first full lab report, so I tried to improve my transitions when putting my background, data, and analysis together.

I synthesized CsPbCl3, CsPbBr3, and CsPbI3. CsPbBr3 is shown above, but CsPbCl3 and CsPbI3 did not appear as expected. The UV-Vis for all products were different than expected, so this experiment was likely unsuccessful or contained significant impurities.

Experiment 47 focused on saccharin complexes with cobalt and copper. Product A was tetraaqua-bis(o-sulfobenzoimido)copper (II), and product B was tetraaqua-bis(o-sulfobenzoimido)cobalt(II).

To analyze the product, I used IR, UV-Vis, and TGA. This was my first time using UV-Vis for this lab, although I have experience outside of class. It was interesting to see how different types of spectrophotometers function. I have used a different form of UV-Vis for my organic lab, and another at my internship, so I enjoyed learning about the different software.

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OPTIZEN Alpha can grasp the quantitative characteristics such as density or purity by measuring transmittance or optical density according to wavelength of sample in the range of ultraviolet rays and visible ray. OPTIZEN Series can be utilized from not only a general analysis experiment to but also a specialized research field and guarantee accurate measurement and excellent reproducibility, accordingly offer reliable results in the various fields such as environment, biotechnology, chemistry, etc.