Recent progress has shown that molecular orientation in vapor-deposited glasses can affect device performance. The deposition process can result in films where the molecular axis of the glass material is preferentially ordered to lie parallel to the plane of the substrate. Here, materials made within Dow’s Electronic Materials business showed enhanced performance when the orientation of the molecules, as measured by variable angle spectroscopic ellipsometry, was oriented in a more parallel fashion as compared to other materials. For one material, the anisotropic packing was observed in the as-deposited glass and was isotropic for solution-cast and annealed films. In addition, the density of an as-deposited N,N′-bis(naphthalene-1-yl)-N,N′-bis(phenyl)-2,2′-dimethylbenzidine (NPD) film was 0.8% greater than what was realized from slowly cooling the supercooled liquid. This enhanced density indicated that vapor-deposited molecules were packing more closely in addition to being anisotropic. Finally, upon heating the NPD film into the supercooled liquid state, both the density and anisotropic packing of the as-deposited glass was lost.

Reduction of (eta(5):eta(1)-C(5)Me(4)SiMe(2)NR)TiCl2 with (n)BuLi in the presence of various 1,3-dienes yields (eta(5):eta(1)-C(5)Me(4)SiMe(2)NR)Ti(diene) complexes. The diene coordination mode (pi formally Ti(II), or metallacyclic, formally Ti(IV)) and the activity for olefin. polymerization (which can be very high) are highly sensitive to the identity of R.