| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1257396 | Chinese Chemical Letters | 2014 | 7 Pages |
A series of fluorescent siloxane-polyurethanes (HPMS-PUs) containing an amino-functionalized, 1,8-naphthalimide, fluorescent monomer (AABD) as a chain extender were synthesized. The properties of the HPMS-PUs were investigated by UV–vis and fluorescence spectroscopies, thermogravimetric analysis and thermal migration behavior. The maximum absorption and emission wavelengths of HPMS-PUs showed a red shift of about 4 nm and a blue shift of about 9 nm, respectively, compared to those of AABD. The Stokes shifts of AABD and HPMS-PU2 were 3514 and 2931 cm−1, respectively. The quantum yield of HPMS-PU2 was 0.79, which was six times higher than that of AABD. Concentration self-quenching was observed in both AABD and HPMS-PUs. The fluorescence of HPMS-PUs was quite stable with respect to both temperature and fluorescence quencher effects. The thermal stability of HPMS-PUs increased with AABD content. The fluorophore units in the HPMS-PUs did not readily migrate.
Graphical abstractA series of fluorescent siloxane-polyurethanes containing an amino-functionalized 1,8-naphthalimide fluorescent monomer as a chain extender were synthesized. The incorporation of the novel fluorescent monomer produced substantial changes in the fluorescent and thermal properties of siloxane-polyurethanes.Figure optionsDownload full-size imageDownload as PowerPoint slide
