The Effect of Physical Aging on the Time-Decay Behavior of Second Harmonic Generation Activity in a Poled Polymer Film

Lee, Sang Cheol; Kidoguchi, Akira; Watanabe, Toshiyuki; Yamamoto, Hajime; Hosomi, Takeshi; Miyata, Seizo

doi:10.1295/polymj.23.1209

Cited by 11 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The decrease in the local free volume restricts the dipole reorientation of the chromophore, and induces better temporal stability despite the operating temperatures are as high as 80 °C. Similar physical aging effect on temporal stability of NLO polymers was also observed in the literature. − These results imply that the rotational volume of the chromophore Cz2PhSO 2 is very close to the free volume of the polymer matrices when the operating temperature is close to T g . This is in contrast to fast decay of the oriented dipoles of other NLO guest−host systems at temperatures close to T g . − …”

Section: Resultssupporting

confidence: 86%

Novel Guest−Host NLO Poly(ether imide) Based on a Two-Dimensional Carbazole Chromophore with Sulfonyl Acceptors

2001

View full text Add to dashboard Cite

Taking advantage of the multifunctional characteristics of carbazole along with rational molecular design, a two-dimensional (2-D) carbazole chromophore was synthesized by a facile synthetic route. By doping of the chromophores into an organosoluble poly(ether imide), a series of guest−host NLO polymers were acquired. A high doping level up to 38 wt % was obtained without observing aggregation of NLO chromophores. The second harmonic coefficients (d 33) for the guest−host system range from 5 to 22 pm/V, dependent on the doping level. The compatibility between chromophore and poly(ether imide) was investigated by SEM and extraction experiment. In the aspect of compatibility, the molecular weight distribution of the polymer plays an important role. The effect of two-dimensional structure on the NLO temporal stability was investigated by tracing the second harmonic coefficient as functions of temperature and time, respectively. Moreover, the relaxation behavior of the NLO systems was further examined by dielectric analysis. Large rotational cone volumes give the two-dimensional chromophore excellent orientational stability when the temperature approaches the glass transition temperature observed from DEA.

show abstract

Section: Resultssupporting

confidence: 86%

Novel Guest−Host NLO Poly(ether imide) Based on a Two-Dimensional Carbazole Chromophore with Sulfonyl Acceptors

2001

View full text Add to dashboard Cite

show abstract

“…A similar physical aging effect on the temporal stability of NLO polymers was also observed in the literature. [45][46][47] These results imply that the rotational volume of the chromophore Cz2PhNO 2 is very close to the free volume of the polymer matrices when the operating temperature is close to T g . This is in contrast to the fast decay of the oriented dipoles of other NLO guest-host systems at temperatures close to T g .…”

Section: Temporal Relaxation Behaviormentioning

confidence: 57%

Synthesis and macroscopic second-order nonlinear optical properties of poly(ether imide)s containing a novel two-dimensional carbazole chromophore with nitro acceptors

2002

View full text Add to dashboard Cite

Taking advantage of the multifunctional characteristics of carbazole along with rational molecular design, a two-dimensional carbazole chromophore with strong nitro acceptors was synthesized by a facile synthetic route. A first molecular hyperpolarizability of 163 6 10 230 esu was acquired through solvatochromic methods. By doping of the chromophores into an organosoluble poly(ether imide), a series of guest-host NLO polymers were acquired. A high doping level up to 20 wt% was obtained without observing aggregation of NLO chromophores. The compatibility between chromophore and poly(ether imide) was also investigated by SEM and extraction experiments. In terms of compatibility, the molecular weight distribution of the polymer plays an important role. The second harmonic coefficients (d 33 ) for the NLO-active poly(ether imide)s range from 7 to 23 pm V 21 depending on the doping level. The effect of two-dimensional structure on the NLO temporal stability was investigated by tracing the second harmonic coefficient as a function of time. Moreover, the relaxation behavior of the NLO systems was further examined by dielectric analysis. Large rotational cone volumes give the two-dimensional chromophore excellent orientational stability when the temperature approaches the glass transition temperature observed from DEA.

show abstract

“…All the NLO-active sol-gel materials exhibit excellent film transparency. Their second harmonic coefficients, d 33 are in the range of 14.0-23.2 pm/V. Reactive systems such as HM-DO3 and HM-DANA exhibit high thermal endurance and better temporal stability because of higher crosslinking density and greater rigidity.…”

Section: Resultsmentioning

confidence: 99%

“…The physical aging effect on temporal stability of the polymers was also described in literature. [32][33][34] Fig. 10 shows the time-dependent decay of the effective SH coefficients of the benzoguanamine-based NLO polymers at 50 8C.…”

Section: Temporal Relaxation Behaviourmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and characterization of all organic NLO sol-gel materials based on amino azobenzene dyes

Hsiue¹,

Kuo

Lin

et al. 2000

Macromol. Chem. Phys.

View full text Add to dashboard Cite

A series of NLO active chromophores based on amino azobenzene dyes have been synthesized by diazotization reaction. All organic NLO‐active materials were obtained by introducing the chromophores into (hydroxymethyl)‐benzoguanamine (HMBG) systems by a sol‐gel process. All the sol‐gel materials exhibit excellent optical transparency. Morphology, thermal and optical properties of these polymers have been characterized. These NLO‐active polymers can be classified into reactive systems and guest‐host systems. In the reactive systems, the chromophores were condensed with HMBG in the sol‐gel process. In the guest‐host systems, the nonreactive chromophores were simply doped into HMBG matrix. A second harmonic coefficient, d33, of 23.2 pm/V has been obtained. Moreover, a systematic investigation of variation of chromophoric chemical structures on NLO properties has been investigated. Covalent bonding effect between chromophore and benzoguanamine as well as steric effect are shown to greatly enhance the temporal stability for these NLO‐active sol‐gel systems.

show abstract

The Effect of Physical Aging on the Time-Decay Behavior of Second Harmonic Generation Activity in a Poled Polymer Film

Cited by 11 publications

References 6 publications

Novel Guest−Host NLO Poly(ether imide) Based on a Two-Dimensional Carbazole Chromophore with Sulfonyl Acceptors

Novel Guest−Host NLO Poly(ether imide) Based on a Two-Dimensional Carbazole Chromophore with Sulfonyl Acceptors

Synthesis and macroscopic second-order nonlinear optical properties of poly(ether imide)s containing a novel two-dimensional carbazole chromophore with nitro acceptors

Preparation and characterization of all organic NLO sol-gel materials based on amino azobenzene dyes

Contact Info

Product

Resources

About