Journal ArticleDOI
Third-Order Nonlinear Optical Properties of Substituted Polyphenylacetylenes
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TLDR
In this paper, the third-order harmonic generation (THG) and electroabsorption (EA) in substituted polyphenylacetylenes (PPAs) have been studied.Abstract:
Third-order harmonic generation (THG) and electroabsorption (EA) in substituted polyphenylacetylenes (PPAs) which are examples of onedimensional π-conjugated polymeric systems have been studied. The values of x (3)(-3ω;ω,ω,ω) obtained from THG measurement for substituted PPAs increase with increasing λmax of absorption. The dispersion of x (3) (-ω;ω,0,0) for PPA film derived from Kramers-Kronig transformation of optical absorption change under the electric field (EA spectra) has been observed, and it shows the similar shape of the second derivative of the optical absorption spectra. The typical value of x (3)(-ω;ω,0,0) for o-substituted PPA was determined to be ca. 10−11 esu.read more
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Liquid crystalline polyacetylene derivatives with advanced electrical and optical properties
Benedict A. San Jose,Kazuo Akagi +1 more
TL;DR: In this article, the authors review the recent progress in advanced functionalities of liquid crystalline polyacetylenes (LCPAs) and focus on properties and functionalities that include (i) electrical anisotropy, (ii) linearly polarised luminescence (LPL), and (iii) circularly polarised luminance (CPL).
Journal ArticleDOI
Polymerization of o-Trifluoromethyl(phenylacetylene) Initiated by [Rh(norbornadiene)Cl]2 and MoOCl4−n-Bu4Sn−EtOH Catalysts. Formation of Order and Disorder Trans Sequences
TL;DR: In this article, a trifluoromethyl(phenylacetylene) (oTFMPA) was successfully polymerized by a Rh complex, [Rh(norbornadiene)Cl]2 catalyst, in the presence of triethylamine as the polymerization solvent under mild conditions.
Journal ArticleDOI
Synthesis and properties of aluminum phthalocyanine side-chain polyimide for third-order nonlinear optics
TL;DR: A third-order nonlinear optical polyimide with aluminum phthalocyanine unit as a side-chain (APSPI) has been developed in this paper, which has number and weight-average molecular weights of 34,000 and 64,000, respectively.
Journal ArticleDOI
Third-Order Nonlinear Optical Properties of One-Dimensional Conjugated Polymers
Tatsuo Wada,Liming Wang,Harukiokawa,Toshio Masuda,Masayoshitabata,Meixiang Wan,Masa-aki Kakimoto,Yoshioimai,Hiroyuki Sasabe +8 more
TL;DR: In this article, the authors measured third-harmonic susceptibilities in various one-dimensional conjugated polymer films at a fundamental wavelength of 1.907 μm and found that the relationship between polymer structure and the thirithmic susceptibilities was not well understood.
Journal ArticleDOI
Synthesis and optical properties of azobenzene-containing poly(1-alkyne)s with different spacer lengths and ring substituents
Shouchun Yin,Hongyao Xu,Xinyan Su,Yachen Gao,Yinlin Song,Jacky Wing Yip Lam,Ben Zhong Tang,Ben Zhong Tang,Wenfang Shi +8 more
TL;DR: In this article, the authors designed and synthesized poly(1-alkyne)s containing azobenzene pendants with different spacer lengths and ring substitutents, and the polymers were prepared in satisfactory yields with high molecular weights by [Rh(nbd)Cl]2-Et3N in THF or dioxane.
References
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Journal ArticleDOI
Third‐order polarizabilities of long‐chain molecules
J. P. Hermann,J. Ducuing +1 more
TL;DR: The third-order polarizabilities of several alkanes and polyenes have been deduced from third harmonic measurements as mentioned in this paper, and large values of χ(3)≃10−12 esu are found in molten retinol and retinal.
Nonlinear optical properties of polymers
TL;DR: In this paper, the authors present papers from a Symposium on nonlinear optical properties of polymers, including implementation of neural networks; optical architecture and devices; highly oriented unsubstituted polydiacetylene; and non-linear optical waveguides containing a transition metal-based dye molecule.
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Polymerization of silicon-containing diphenylacetylenes and high gas permeability of the product polymers
TL;DR: 1-Phenyl-2-[p-(trimethylsilyl)phenyl]acetylene and 1-phenylacetylene polymers were polymerized with TaCl 5 cocatalyst systems to provide new polymers with over 70% yields having a weight average molecular weight over 1×10 6.
Journal ArticleDOI
Resonance enhancement in cubic susceptibility of Langmuir-Blodgett multilayers of polydiacetylene
F. Kajzar,J. Messier +1 more
TL;DR: In this paper, wave-dispersed third harmonic generation measurements on multilayers of polydiacetylene polysilicon have been carried out and the existence of two resonances in cubic susceptibility χ(3)xxxx(−3ω;ω,ω,