Synthesis and nonlinear optical properties of polyphosphazenes with binaphtholyl and indole side groups

Abstract

New polyphosphazenes (P2 and P3) that contain indole-based chromophore and binaphtholyl moieties as side chains are prepared by a new postfunctional strategy. Molecular structural characterization for the high polymers was presented by 1 H-NMR, IR and UV-Visible spectra, gel permeation chromatograply, and differential scanning calorimetry. The glass transition temperature of P2 was determined to be 1688C, higher than those polyphosphazenes reported previously in the literatures. P2 and P3 are thermal stable and easily soluble in high polar solvents. The maximum absorption of P2 in chloroform was at 425 nm and cuts off at about 550 nm, while that of P3 was 393 nm and 500 nm, respectively, which resulted in a wide transparency window. The poled films of P2 and P3 reveal a resonant d 33 value of 20 pm/V and 14 pm/V, respectively, by second harmonic generation measurements.

Nonlinear optical polyimide/montmorillonite nanocomposites consisting of azobenzene dyes

“…Therefore, the r 33 activity would begin to decrease at the temperature above room temperature. Similar phenomenon was also reported by other researchers [8,51,52]. Besides, PDT1C exhibits a higher effective relaxation temperature as compared to the pristine polyimide, PIDO3, indicating that the mobility of the aligned NLO dyes in PDT1C is more restricted than that in the pristine polyimide.…”

Inorganic and organometallic polymers

“…57 The nonlinear optical properties of polyphosphazenes containing binaphtholyl and indole side groups has been investigated. 58 Intrinsically fluorescent hydrophobic and amphiphilic polyphosphazenes have been prepared which are of interest as visible tracers in biomedical studies. 59 Polymers containing cyclic phosphazenes in the side-chain structure have been shown to be very good imprint lithography resists.…”

Poly(difluorophosphazene) as the First Deep‐Ultraviolet Nonlinear Optical Polymer: A First‐Principles Prediction

“…[3] From the calculated results as listed in Table 1, PN(OH) 2 exhibits al arge E g (approximately 6.6 eV), d ij (approximately 5 KDP), and Dn (approximately 0.14), so its l PM can reach to 190 nm, which is available for the 193.7 nm DUV PM output. [23] Their physical and chemical properties could be further optimized to satisfy the DUV NLO condition by changing substituent groups.Meanwhile,the laser-induced damage threshold might be enhanced with the improvement of crystal quality,defect property,and experimental technique.Moreover,most PNR 1 R 2 are organic polymers with good phase stability (for example,[ NP-(OCH 2 CF 3 ) 2 ] n ,[ NP(OC 6 H 5 ) 2 ) n ), [21] which would provide an ew direction for discovering or designing DUV NLO materials in organic polymer systems. [13][14][15][16][17][18][19] Preliminary experiments have confirmed the stability of these compounds including Mg 2 PN 3 ,L i 2 PNO 2 and PNF 2 .…”

“…[22] Mg 2 PN 3 ,Li 2 PNO 2 ,and PNF 2 structures are stable (at least) at room temperature (300 K) for practical NLO applications.I nf act, the analogue PNR 1 R 2 -type polymers have exhibited some advantages and novel NLO properties however not in the DUV region. [23] Their physical and chemical properties could be further optimized to satisfy the DUV NLO condition by changing substituent groups.Meanwhile,the laser-induced damage threshold might be enhanced with the improvement of crystal quality,defect property,and experimental technique.Moreover,most PNR 1 R 2 are organic polymers with good phase stability (for example,[ NP-(OCH 2 CF 3 ) 2 ] n ,[ NP(OC 6 H 5 ) 2 ) n ), [21] which would provide an ew direction for discovering or designing DUV NLO materials in organic polymer systems.…”