Vihanga Munasinghe

8 Questions 18 Answers 0 Followers

Questions related from Vihanga Munasinghe

What wavelength (LC or MLCT) should be used to excite a Ir(III) complex to obtain an emission spectra ?

This question is regarding an Ir(ppy)2(bpy) complex. After analysing the UV-Vis spectrum (attached below) of the complex I could assign[1], λabs for (spin allowed)LC π -π * = 254 nm and λabs for...

29 April 2020 4,328 0 View

How to remove TBTA after click reaction (apart from using column separation)?

CuAAC (Cu catalyzed azide-alkyne cycloadition) product and TBTA has similar Rf values. Hence, it id hard to isolate product using column/prep TLC. Any suggestions to remove TBTA will be greatly...

21 November 2018 2,030 5 View

What can we predict from the peak intensity ratios of a powder XRD?

When comparing a PXRD of MIL-100 MOF with known literature it was observed that there are peaks on the same 2θ values but in different intensity ratios. Can I still say that I have synthesized the...

17 November 2016 9,714 14 View

Does anyone have the cif. file for MOF-2 ?

As I need to compare the PXRD of the synthesized MOF-2 along with the reported data, it would be a great help if I can get the cif. file or the X/Y data from a known publication of MOF-2. Thanks...

09 November 2016 162 7 View

Is MOF-2 stable when exposed to air ?

I have synthesized an already published procedure to get MOF-2. TGA performed for the synthesized MOF was matched with the reported data. But the PXRD results differed. PXRD was done about a month...

31 October 2016 2,208 20 View

What are the Reasons for Cu to leach from HKUST-1 Metal organic framework ?

A highly conjugated organic molecule was tried to load to HKUST-1 pores by dissolving the organic substance in ethanol and stirring with HKUST-1 for a day. After a day the sample was centrifuged...

20 October 2016 7,265 13 View

What is the reason for HKUST-1 to change its colour to a more dark blue colour during the activation step ?

As I have used DMF for the synthesis process of HKUST-1, I had to activate it in the oven at 110 0C after solvent exchanging with ethanol, prior to applications. while it was in the oven the...

11 October 2016 7,005 4 View

How can controlled releasing of drugs from MOFs (metal organic frameworks) be a solution to insolubility of the drug ?

Many MOFs have been tried as a carrier of Ibuprofen which is insoluble. But how can the controlled releasing properties of MOFs overcome the insolubility of Ibuprofen ? Or are there any other...

11 October 2016 8,761 7 View