POLY 105 |
| Polyisobutene succinic anhydrides (PIBSA) end imides (PIBSI) are additives largely employed as dispersants in lubricants and fuel formulations.They are dark, viscous liquids and although they are not emittive molecules, when properly excited by long range UV radiation, in certain conditions, they exhibit a blue-green colour.This property is called Aggregation Induced Emission (AIE) and is due to the aggregation occurring among non emittive molecules or devoid of chromophoric groups causing restricted vibro-rotational motions which in turn involves reduced non-radiative relaxations and increased fluorescence quantum efficiency. The luminescence quantum yield is directly related to the aggregation and thus to the concentration of interacting groups. In this work the AIE phenomenon of various PIBSA and PIBSI was studied, in n-heptane, as a function of the nature of the molecule (succinic anhydride or imide) and the number of interacting groups. Results suggest that the AEI is strongly dependent on the number of interacting carbonyl cromophores grafted on the polymer backbone and the associated quantum photoluminescent efficiency mostly fits the calculated functionalization degree. |
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General Papers: Functional Materials
6:00 PM-8:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster
Sci-Mix
Division of Polymer Chemistry |