The results are listed in Table , which shows that the decomposition temperature increases with increasing molecular weight for all four solvents. The solvents were also tested for longer term thermal stability (as an approximation of their tendency to evaporate) by exposing aliquots to 80°C temperatures for two days under 50 mL/min air flow to estimate the amount of weight loss to be expected due to volatility. These results are also listed in Table , and the results show that the weight lost decreases with increasing molecular weight, as shown in Figure . Both ( ) and ( ) lost approximately 10 wt% over the twoday span, whereas (1) lost almost 90 wt%, and both TBP and T i BP had completely evaporated during this time. Unlike the CO2 and H2O absorption properties, the tendency of these functionalized TBP analogues to evaporate improved upon inclusion of etheric groups.