ISSN:
1057-9257
Schlagwort(e):
Porphyrin polymer
;
Non-linear optics
;
Quadratic electro-optic effect π-Conjugation
;
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Elektrotechnik, Elektronik, Nachrichtentechnik
,
Physik
Notizen:
We reprot linear and non-liner optical experiments on a new edge-linked porphyrin polymer that is soluble in pyridine/chlorinated solvent mixtures and that produces optical quality thin films by spin coating. This linear absorption properties of the polymer indicate that it posseses an extended intermacrocycle π-conjugation. This results in a strong red shift of the macrocycle-derived Q-band with the polymer peak at 874 nm (1.42 eV) in solution and 838 nm (1.48 eV) in solid films compared with a monomer solution peak at 642 nm (1.93 eV). The polymer possesses a large Stark-shift-related DC Kerr electro-optic non-linearity with peak responses in the real and imaginary part of X(3) (-ω; 0, 0, ω) of ReX(3) = -7.2 × 10 -8 esu at 849 nm (1.46 eV) and lmX(3) = 6.7 × 10-8 esu at 855 nm (1.45 eV). This response is 3-10 tiems larger that that reported for quasi-one-dimesional conjugated polymers and enhancements can be anticipated. Detailed examination of the electro-optic response spectra shows several interesting features which indicated that the usual phenomenological models of molecular Stark shifts do not provide a full description of the abserved behaviour. Future studies are planned to look more closely at the nature of the electro-optic response.
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/amo.860040407
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