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    (195Pt) Platinum NMR Properties of 195Pt Safety note References
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(195Pt) Platinum NMR

Use our NMR service that provides 195Pt NMR and many other NMR techniques.

Platinum (Pt) has one medium sensitivity NMR spin-½ nucleus, 195Pt that yields narrow signals over a very wide chemical shift range (fig. 1). Because platinum has such a wide chemical shift range and 195Pt gives narrow signals, the slightest effect can be resolved as in the spectrum in fig. 2 where replacing 35Cl with 37Cl gives extra signals. 195Platinum NMR is mostly used for studying platinum complexes, their structure, conformation and dynamics, and platinum binding in biological systems. Because platinum is widely used as an industrial catalyst and in medicine, its chemistry and NMR has been widely studied.

Fig. 1. 195Pt-NMR spectrum of K2PtCl4 in D2O

Platinum spectrum

Fig. 2. Resolution enhanced 195Pt-NMR spectrum of K2PtCl4 in D2O showing isotopomers

Platinum spectrum showing isotopomers

Each type of platinum its representative chemical shift range (fig. 3).

Fig. 3. Chemical shift ranges for platinum NMR

Chemical shifts of platinum

Platinum shows a wide variety of couplings with other nuclei, 1H, 13C, 15N, 31P, etc. Two-bond couplings to protons are between 25 and 90 Hz. One-bond 195Pt-15N couplings are in the region of 160 to 390 Hz. Couplings to 31P are around 1300 to 4000 Hz for one-bond and 30 Hz for two-bond. The one-bond coupling to 77Se is between 80 and 250 Hz. The platinum coupling to 119Sn is especially large and can be over 33000 Hz. Homonuclear platinum couplings can also be observed.

Properties of 195Pt

(Click here for explanation)

PropertyValue
Spin1/2
Natural abundance33.832%
Chemical shift range6700 ppm, from -6500 to 200
Frequency ratio (Ξ)21.496784%
Reference compound1.2 M Na2PtCl6 in D2O
Linewidth of reference5.3 Hz
T1 of reference0.4 s
Receptivity rel. to 1H at natural abundance3.51 × 10-3
Receptivity rel. to 1H when enriched0.0104
Receptivity rel. to 13C at natural abundance20.7
Receptivity rel. to 13C when enriched61.2

Safety note

Some of the materials mentioned here are very dangerous. Ask a qualified chemist for advice before handling them. Qualified chemists should check the relevant safety literature before handling or giving advice about unfamiliar substances. NMR solvents are toxic and most are flammable. Specifically, platinum salts may cause allergies: wear protective gloves.

References

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