Site selection, hole burning, and stark effect on resorufin in poly(methyl methacrylate)
β Scribed by A.P. Marchetti; M. Scaozzafava; R.H. Young
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 282 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Site-selection
spectra of the anionic dye resorufin in poly(methy1 nethacrylate) have been obtained at pumped helium temperatures.
Hole burning has been observed in these films upon prolonged irradiation not only at the wavelength of irradiation but in the vibronic sublevels. The Stark spectrum of the hole (i.e., of the "burnt" molecules) yields a value of 0.2 + 0.05 D for the dipole moment change upon excitation.
π SIMILAR VOLUMES
Core-shell composite particles were prepared by a heterocoagulation and annealing process, in which control of the number of chemical linkages in the interfacial zone without changing other properties was possible using Γve kinds of small size shell particles (SP) with di β erent carboxyl charge dens
## Abstract Poly(methyl methacrylate) (PMMA) was synthesized in different ionic liquids (IL) by free radical polymerization. The average molecular weight and polydispersity of the PMMA were measured by gel permeation chromatography. It is found that ILs have effect not only on the molecular weights