Azobenzimidazole Compounds and Polymers for Nonlinear Optics

Abstract

Novel difunctional nonlinear optical (NLO) azo compounds with exceptional thermal stability have been synthesized and incorporated into side-chain and cross-linked polymers. The nonlinear optical response of these polymers has been studied with second-harmonic generation and electrooptic measurements. Channel waveguide intensity modulators displayed an electrooptic coefficient of 13.1 pm/V.

Second-order non-linear optical polymers

“…An azobenzimidazole functionalized (100%) polymethacrylate 43) with T g of 128 8C gave a d 33 (-2 x; x, x) value of 13 pm/V (excitation at 1 580 nm). A guesthost polymer with the same azobenzimidazole in a PMMA matrix on the other hand, showed a d 33 (-2 x; x, x) = 2.8 pm/V.…”

Synthesis, crystal structure investigation, DFT studies and DPPH radical scavenging activity of 1-(furan-2-ylmethyl)-2,4,5-triphenyl- 1H -imidazole derivatives

“…Imidazole ring structure display a range of pharmaceutical actions [1][2][3] and play a significant role in biochemical processes. Imidazole derivatives have diverse biological activities such as anti-inflammatory [4], anti-allergic [5], analgesic [6], antibacterial [7], anti-oxidant [8], antitumor [9], Heme oxygenase-1 (HO-1) and Heme oxygenase-2 (HO-2) inhibitors and their cytotoxic activity [10], FAK inhibitors with anticancer activity [11], light-sensitive materials in photography are known as inhibitors, fungicides and herbicides [12], inhibitors of p38 MAP kinase [13], A recent report indicates that imidazoles are potent inhibitors of protein-protein interactions [14], plant growth regulators and therapeutic agents [15], The imidazole ring's biocompatibility provides a scaffold for biomimetic applications [16], DNA sequence targets for alkylating DNA and suppressing gene expression [17], Inhibit enzymes and kill fungal pathogens, inhibition of post-translational farnesylation, which is a key step for Ras proteins that influence cancer proliferation, a naturally occurring imidazole in the body is involved with everyday functions: sleeping, eating, drinking, and cognitive processes, antagonists for histamine may provide treatments for Alzheimer's disease and depression [18], Physicochemical behavior [19], dye super sensitized star cells (DSSCs) [20][21], nonlinear optics (NLO) [22][23][24][25] and organic light emitting diodes (OLED) [26][27][28][29]. Vibrational spectroscopy is a valuable tool for the elucidation of molecular structure and gives a dynamical image of the molecule.…”

Solvent and pH Effects on the Electronic Spectra of Some Azo Benzimidazoles

“…This is because the trivalent imidazole nitrogen offers a site for functionalization of the compound. 1 Douheret. 9 The measurements of pH were carried out using a pH-meter, Model MV 87, digital pH-Messgerate, accurate to ± 0.005 unit.…”