Dynamic Properties of Stretched Water
  We investigate the dynamics of the extended simple point charge (SPC/E) model of water in the supercooled region. The dynamics at negative pressures show a minimum in the diffusion constant $D$ when the density is decreased at constant temperature, complementary to the known maximum of $D$ at higher pressures. A similar trend in the rotational diffusion is also observed. 
P. A. Netz, F. Starr, H. Eugene Stanley and M. C. Barbosa