Solution vs. solid state

TABLE 6. Comparison of solid state vs solution 29Si chemical shifts for several zwitterionic complexes... 

Table 6 lists comparisons of solid state vs solution 29 Si chemical shifts for several other zwitterionic complexes. In general the values obtained in solution agree quite well with those in the solid state, with one notable exception for 59 dissolved in DMSO-dg <529Si is shifted 38.2 ppm upheld relative to the solid state46. 

Electrochemical data for the solid state are rare, but one example comprises reduction potential measurements of oligo(p-phenylene-vinylenes) with a convergence limit of —2.18 V vs. Fc/Fc+ for long chains. In contrast to the solution measurements, all solid-state voltammograms exhibit a strong hysteresis [240]. 

The luminescent properties of [Os (N)(NH3)4]X3 (X = C1, CF3S03) and (Ph4As)2[Os -(N)(CN)5] have also been reported (Table 3). The complexes are emissive and have long excited state lifetimes both in the solid state and in fluid solutions at room temperature (Aen,= 550nm in MeCN). [Os(N)(NH3)4]Cl3 is a powerful one-electron oxidant in the excited state, with an excited state redox potential of 2.1 V vs. NHE. The emitting state has been suggested to be d y) dj f] in origin. 

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