0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
Can you use NMR in characterisation of nanomaterials?
It depends of course on the specific material, but it being nano-sized makes no difference at all to the NMR spectrum. Nuclear Magnetic Resonance works on the principles of excitation and emission of the nucleus of the atoms. Only certain nuclei are capable of being monitored using NMR spectroscopy. What is required is a nucleus with an odd number of particles in it (such as carbon-13, hydrogen-1, fluorine-19, etc) which have odd spin. However such nuclei are common to most materials and therefore should allow the use of NMR for characterisation of nanoparticles. You can learn more about the types of nuclei and physical properties of nuclei at NMRCentral.com
What is the primary advantage of 3D-NMR over 2D-NMR?
One more D.It's difficult to answer this question exactly, since it's not always necessarily true that 3D NMR is better than 2D NMR (or even than 1D NMR). It really depends on what information you're looking for. In fact, sometimes information that theoretically couldbe used to add an extra dimension is intentionally supressed (example: carbon-13 CP-MAS, where the proton spins are deliberately blasted to decouple them from the carbon nuclei), because the spectroscopist is not interested in that.
Why does a triplet occurs in C 13 nmr spectra with CDCl3?
In this case, carbon nuclei can couple with deutrium one and the spin quantum no. (I) of deutrium is 1. So according to the famous formula to find the multiplicity of a signal (2nI+1) in NMR, it comes out to be 3 i.e. triplet.
What is the use of the isotope Cobalt -59?
59Co is a nucleus of spin 7/2 and 100% abundancy.[1] The nucleus has a magnetic quadrupole moment. Among all NMR active nuclei, 59Co has the largest chemical shift range and the chemical shift can be correlated with the spectrochemical series.[2] Resonances are observed over a range of 20000 ppm, the width of the signals being up to 20 kHz. A widely used standard is potassium hexacyanocobaltate (0.1M K3Co(CN)6 in D2O), which, due to its high symmetry, has a rather small line width. Systems of low symmetry can yield broadened signals to an extend that renders the signals unobservable in fluid phase NMR, in these cases signals can still be observable in solid state NMR.
How do you get proton decoupled spectra of 13C NMR?
There should be a button that lets you do this very easily. There is on a Brukker 400MHz NMR.
Can you use NMR in characterisation of nanomaterials?
It depends of course on the specific material, but it being nano-sized makes no difference at all to the NMR spectrum. Nuclear Magnetic Resonance works on the principles of excitation and emission of the nucleus of the atoms. Only certain nuclei are capable of being monitored using NMR spectroscopy. What is required is a nucleus with an odd number of particles in it (such as carbon-13, hydrogen-1, fluorine-19, etc) which have odd spin. However such nuclei are common to most materials and therefore should allow the use of NMR for characterisation of nanoparticles. You can learn more about the types of nuclei and physical properties of nuclei at NMRCentral.com
What is the different between proton nuclear magnetic resonance and deuterium nuclear magnetic resonance?
Proton nmr has spin half nuclei. Deuterium NMR has spin 1 nuclei. One difference would be that hydrogen signals would not be split by fluorine (or phosphorus) in a molecule if it was Deuterium nmr. Another key difference is if it was an unenriched sample, deuterium NMR would be very weak (way less sensitive) compared to proton as it is very much less abundant naturally than hydrogen (1% or so)
Is pmr and nmr same?
No, PMR (Pulse Mass Ratio) and NMR (Nuclear Magnetic Resonance) are not the same. PMR is a technique used in mass spectrometry, while NMR is a technique used in spectroscopy to study the magnetic properties of atomic nuclei. Both techniques are valuable in analytical chemistry but serve different purposes.
Is your galaxy an active galactic nuclei?
No.
What is the primary advantage of 3D-NMR over 2D-NMR?
One more D.It's difficult to answer this question exactly, since it's not always necessarily true that 3D NMR is better than 2D NMR (or even than 1D NMR). It really depends on what information you're looking for. In fact, sometimes information that theoretically couldbe used to add an extra dimension is intentionally supressed (example: carbon-13 CP-MAS, where the proton spins are deliberately blasted to decouple them from the carbon nuclei), because the spectroscopist is not interested in that.
Why does a triplet occurs in C 13 nmr spectra with CDCl3?
In this case, carbon nuclei can couple with deutrium one and the spin quantum no. (I) of deutrium is 1. So according to the famous formula to find the multiplicity of a signal (2nI+1) in NMR, it comes out to be 3 i.e. triplet.
Why does a triplet occurs in C-13 nmr spectra with CDCl3?
In this case, carbon nuclei can couple with deutrium one and the spin quantum no. (I) of deutrium is 1. So according to the famous formula to find the multiplicity of a signal (2nI+1) in NMR, it comes out to be 3 i.e. triplet.
What is the difference between NMR and FT- NMR instrumentation?
NMR Spectroscopy Use molecule Structure FT NMR Use Different No. of mass Structure
What did Richard R Ernst invent or discover?
Ernst discovered that the sensitivity of NMR techniques could be dramatically increased by replacing the slow, sweeping radio waves traditionally used in NMR spectroscopy with short, intense pulses. His discovery enabled analysis of a great many more types of nuclei and smaller amounts of materials.
How do you interpretation a cosy nmr?
cosy is a one of 2D-NMR technique
What type of allele is in the all of the egg nuclei?
the dominant allele is in all egg nuclei.
What type of allele is in all of the sperm nuclei?
the recessive allele is in all sperm nuclei.
