Synthesis and Properties of Novel Y-type Nonlinear Optical Polyester Containing Cyanovinylthiophene with Enhanced Thermal Stability of Second Harmonic Generation

다국어 초록 (Multilingual Abstract)

1-{2,4-Di-(2-hydroxyethoxy)phenyl}-2-(2-thienyl)ethene (5) was prepared and condensed with terephthaloyl
chloride to yield polyester (6). Polymer 6 was reacted with tetracyanoethylene to give novel Y-type polyester (7)
containing 1-(2,4-dioxyethoxy)phenyl-2-{5-(2,2,3-tricyanovinyl)-2-thienyl)}ethenyl groups as NLO-chromophores,
which are parts the polymer backbones. Polymer 7 is soluble in common organic solvents such as acetone and
N,N-dimethylformamide. It showed thermal stability up to 300 oC in thermogravimetric analysis with glasstransition
temperature obtained from differential scanning calorimetry near 134 °C
. The second harmonic generation
(SHG) coefficient (d33) of poled polymer film at the 1560 nm fundamental wavelength was around 6.74 x 10-9
esu. The dipole alignment exhibited high thermal stability up to the glass-transition temperature (Tg), and there was
no SHG decay below 135 oC because of the partial main-chain character of polymer structure, which is acceptable
for NLO device applications.

참고문헌 (Reference)

1 Lee, S.-H., 32 : 342-342, 1999

2 Cisneros, J. I., 37 : 5262-5262, 1998

3 Woo, H. Y., 1 : 8-8, 2000

4 Lee, J.-Y., 55 : 248-248, 2006

5 Ambrosanio, P., 40 : 4923-4923, 1999

6 Renate, D., 34 : 13-13, 1997

7 Herman, W. N., 12 : 416-416, 1995

8 Lee, J.-H., 21 : 847-847, 2000

9 Han, K. S., 19 : 1168-1168, 1998

10 Han, K. S., 19 : 1165-1165, 1998

11 윤진석, "Zn(II)porphyrin Helical Arrays: A Strategy to Overcome Conformational Heterogeneity by Host-Guest Chemistry" 대한화학회 29 (29): 197-201, 2008

12 Jin-Hyang Kim, "Synthesis and Nonlinear Optical Properties of Novel Y-Type Polyesters with Enhanced Thermal Stability of Second Harmonic Generation" 한국고분자학회 15 (15): 506-512, 2007

13 BongRaeCho, "Synthesis and Nonlinear Optical Properties of 1,3,5-Tricyano-2,4,6-tris[2-(thiophen-2-yl)vinyl]benzene Derivatives" 대한화학회 23 (23): 17-1256, 2002

14 Ju-Yeon Lee*, "Synthesis and Electro-Optic Properties of Novel T-Type Polyester with High Thermal Stability of Dipole Alignment" 대한화학회 28 (28): 329-332, 2007

15 MinHoKim, "Synthesis and Characterization of Nonlinear Optical Polymers Having Quinoline-based Chromophores" 대한화학회 23 (23): 12-970, 2002

16 Ju-Yeon Lee*, "Preparation of Novel Nonlinear Optical Polyester with Enhanced Thermal Stability of Dipole Alignment" 대한화학회 28 (28): 1433-1436, 2007

17 Jong Rok Moon, "Preparation and Properties of Novel Biodegradable Hydrogel based on Cationic Polyaspartamide Derivative" 대한화학회 27 (27): 981-985, 2006

18 Min Ju Cho, "Heterocyclic Nonlinear Optical Chromophores Composed of Phenothiazine or Carbazole Donor and 2-Cyanomethylene-3-cyano-4,5,5-trimethyl-2,5-dihydrofuran Acceptor" 대한화학회 26 (26): 77-84, 2005

19 Choongkeun Lee, "Energetic Disorder Dependence of Optimal Trap Depth in the Space Charge Field Formation for Photorefractivity" 대한화학회 28 (28): 447-450, 2007