Synthesis and third order nonlinear optics of a new soluble conjugated porphyrin polymer

Citation
Teo. Screen et al., Synthesis and third order nonlinear optics of a new soluble conjugated porphyrin polymer, J MAT CHEM, 11(2), 2001, pp. 312-320
Citations number
54
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS CHEMISTRY
ISSN journal
09599428 → ACNP
Volume
11
Issue
2
Year of publication
2001
Pages
312 - 320
Database
ISI
SICI code
0959-9428(2001)11:2<312:SATONO>2.0.ZU;2-L
Abstract
The synthesis of a new soluble conjugated porphyrin polymer 4 is reported. The MALDI TOF mass spectrum shows the presence of oligomers with up to 13 r epeat units and GPC gives a M-n of 53 kDa. The electronic absorption spectr a of this polymer exhibit an intense Q band at 800 nm in solution and 853 n m in the solid state, demonstrating a high degree of conjugation. Electroab sorption spectroscopy shows that thin films of 4 have lower resonant third order NLO susceptibility than our previous conjugated porphyrin polymer 2, whereas closed z-scan measurements indicate that the off-resonance real sus ceptibility, at 1064 nm, is exceptionally large for both polymers (chi ((3) )(R) = -2 x 10(-16) m(2) V-2). Open z-scan measurements were also made at 1 064 nm, demonstrating that the two polymers exhibit similar nonlinear absor ption at this wavelength (beta = 1 cm GW(-1) at 0.2 mM concentration).