Polyphenothiazinobisthiazole: A novel polymer for third‐order nonlinear optics

Kistenmacher, A.; Soczka, T.; Baier, U.; Ueberhofen, K.; Bubeck, Christoph; Müllen, Kläus

doi:10.1002/actp.1994.010450314

Cited by 7 publications

(1 citation statement)

References 23 publications

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“…π-Conjugated polymers such as polyacetylene, − polyacetylene derivatives, − poly(aromatic vinylenes), − polyaromatics, − polyazines, − and polyazomethine, − etc., have been extensively studied for the past 4 decades. Polyacetylene and its derivatives may be conceptually defined as the linear polymers having a π-conjugated system in the main chain.…”

Section: Introductionmentioning

confidence: 99%

Poly(1,6-heptadiyne)-Based Materials by Metathesis Polymerization

et al. 2000

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A new class of multifunctional polymers based on poly(l,6heptadiyne) derivatives with various functional groups such as carbazole unit for photoconductive polymers and nonlinear optical (NLO) chromophores for NLO polymers were synthesized by metathesis polymerization. The polymerizations were carried out with MoCI,-and WCI,-based catalysts. The catalytic activity of MoCI, was found to be greater than that of WCI , . The resulting polymers exhibited photoconductivity and large optical nonlinearity. These conjugated polymers have good solubility in common organic solvents, long-term stability toward air oxidation, and high electrical conductivity.

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Section: Introductionmentioning

confidence: 99%

Poly(1,6-heptadiyne)-Based Materials by Metathesis Polymerization

et al. 2000

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Nonlinear Optical Properties of Oligomers

Bubeck¹

1998

Electronic Materials: The Oligomer Approach

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The development of materials with large optical nonlinearities is a key to controlling the propagation of light beams by optical means. The control of light by light requires that photons can strongly interact. This is only possible in media where the optical properties of the materials, such as the refractive index, depend on the light intensity. The availability of appropriate materials for this purpose could revolutionize information technology again in a similar manner to the development of materials for semiconductor electronics.Optical materials with a sufficiently large intensity-dependent refractive index, which could play a similar role to silicon in electronics, have not yet been identified. This field is still at the stage of basic research, where strong efforts are devoted to an understanding of the fundamental relations between structure and optical nonlinearities. It is clear, however, that materials with a highly polarizable electron system are interesting candidates for achieving strong polarizations of the medium, which follow the electric field of the lightwave in a nonlinear manner. Therefore, organic materials with a delocalized n-electron system have found much interest and large nonlinearities of one-dimensional (1 D) conjugated polymers have been reported [l-111. As the optical properties of conjugated polymers are determined largely by the extent of electron delocalization, the corresponding conjugated oligomers have a key role in the study of the scaling of the linear and nonlinear optical properties with the size of the system. It will be seen that the size of the delocalized electron systems and electron correlation effects primarily determine the optical nonlinearities of oligomers.The emphasis of this chapter is on third-order nonlinearities, because they can lead to an intensity-dependent refractive index. The large potential of oligomers, such as to vary their chain lengths systematically, can be used to study third-order phenomena, especially to elucidate characteristic structure-property relationships. Second-order phenomena are the basis for frequency doubling and electro-optical processes. However, they require other chemical systems such as a combination of electron donors and acceptors in noncentrosymmetric structures, which will not be treated here.

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New methods of C‐C and C‐O bond formation in the synthesis of conjugated polymers

Klapper

Müllen

1995

Macromolecular Symposia

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New synthetic developments towards polymers containing aromatic building blocks in the polymer backbone are described. The synthesis of polyphenylene-related systems with an improved solubility due to their alkyl substitution is discussed. Via bridging of the phenylene rings a twisting of the aromatic subunits is avoided and the conjugation improved. This concept is extended to ribbon-type polymers containing 6-or 6-and 5-membered rings. It is demonstrated that during a polycondensation process anthracene can be incorporated into various polymers via C-0 bond formation as well as via C-C connection. Cycloaddition reactions are presented, allowing for modification and grafting of these polymers. Additionally, the use of anthracene derivatives as initiators in homo and block copolymerisation is shown.

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Polyphenothiazinobisthiazole: A novel polymer for third‐order nonlinear optics

Cited by 7 publications

References 23 publications

Poly(1,6-heptadiyne)-Based Materials by Metathesis Polymerization

Poly(1,6-heptadiyne)-Based Materials by Metathesis Polymerization

Nonlinear Optical Properties of Oligomers

New methods of C‐C and C‐O bond formation in the synthesis of conjugated polymers

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