Hi all,

Does anyone know if NMR relaxation rates of bulk (pure) water has been measured experimentally at several hundreds of MHz frequencies (say, 500 MHz, though the higher the better) and at room temperature (say, 300K)?

I am aware of some very old publications that reported pure water T1 at 10s of MHz (e.g. Krynicki (1966), Physica 32:167) or at the lower end of the 100s of MHz regime. However, in recent years NMR instruments have been getting better and better and I believe today several hundreds of MHz experiments are indeed possible.

So I am wondering if anyone has published pure water (proton) relaxation rates at these high frequencies, in the upper end of the 10^8 Hz regime - and hopefully around room temperature. I spent hours searching the literature for this, but to no avail.

I would be very grateful if someone could point me to any such papers please.

Many thanks.