Article
  • Photochemical Reactions of Nonlinear Optical Polymers with a Dimethylaminonitrostilbene Chromophore
  • Choi SH, Song K
  • Dunethy laminonitrostilbene 발색단을 포함한 비선형광학 고분자의 광화학 반응 연구
  • 최시혁, 송기국
Abstract
The photochemical reaction mechanism of 4,4''-dimethylaminonitrostilbene which is a nonlinear optical chromophore was investigated using UV/Vis, FTIR, and NMR spectroscopic methods. By photo-selective reactions, p-nitrobenzaldehyde was formed through an oxidation reaction after the aliphatic C=C doble bond, radicals due to oxidation reactions reacted with other double bonds to form crosslinked chain structures.

비선혀광학 발색단인 4,4`-dimethylaminonitrostilbene의 광화학 반응 mechanism을 UV/Vix, FTIR, NMR spectroscopy 등의 분광학 방법을 이용하여 조사하였다. 선택적으로 발색단에서만 일어나는 광화학 반응에 의하여 stilbene의 aliphatic C=C 이중결합이 끊어지고 oxidation에 의하여 aldehyde group이 형성된 후 þ-nitrobenzaldehyde가 생성되었으며, 사슬에 남았는 끊어진 이중결합 부분에서는 oxidation에 의하여 생성된 라디칼들이 다른 사슬의 이중결합과 반응함으로써 가교 구조를 형성하였다.

Keywords: nonlinear optic; photochemical reaction; stilbene; spectroscopy

References
  • 1. Tripathy S, Cavicchi E, Kumar J, Kumar R, Chemtech, Oct., 620 (1989)
  •  
  • 2. Marden S, Sohn J, Stucky G, ACS Symp. Ser.(455) (1991)
  •  
  • 3. Williams DJ, ACS Symp. Ser.(233) (1983)
  •  
  • 4. Khanarian G, Proc. SPIE, 1227 (1990)
  •  
  • 5. Prasad P, Williams DIntroduction to NLO Effects in Molecules & Polymers, John Wiley & Sons, NY (1991)
  •  
  • 6. Leslie T, Demartino R, Choe E, Khanarian G, Haas D, Yoon H, Mol. Cryst. Liq. Cryst., 153, 451 (1987)
  •  
  • 7. Teng CC, Appl. Phys. Lett., 60, 1538 (1992)
  •  
  • 8. Man H, Yoon H, Adv. Mater., 4, 159 (1992)
  •  
  • 9. Ham SK, Choi SH, Lee BH, Song KG, Polym.(Korea), 21(2), 201 (1997)
  •  
  • 10. Rochford KB, Zanoni R, Gong Q, Stegemann GI, Appl. Phys. Lett., 55, 1161 (1989)
  •  
  • 11. Tomme E, Daele P, Baets R, Mohlmann G, J. Appl. Phys., 69, 6273 (1991)
  •  
  • 12. Shi Y, Steier W, Yu L, Chen M, Dalton L, Appl. Phys. Lett., 58, 1131 (1991)
  •  
  • 13. Imamura S, Yoshimura R, Izawa T, Electron. Lett., 27, 1342 (1991)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1999; 23(1): 158-162

    Published online Jan 25, 1999