Effect of binding mode on the photoluminescence of CTMA-DNA doped with (E)-2-(2-(4-(diethylamino)styryl)-4H-pyran-4-ylidene)malononitrile

Jung Eun Lee, Eui Doo Do, U. Ra Lee, Min Ju Cho, Kyung Hwan Kim, Jung Il Jin, Dong Hee Shin, Suk Ho Choi, Dong Hoon Choi

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Purified natural DNA extracted from Salmon sperm can only be dissolved in water; it is not soluble in any other organic solvent. Therefore, in this study, the structure of DNA was modified and its solubility was changed. The preparation of organic-soluble DNA was carried out by precipitating the purified DNA in water with the cationic surfactant cetyltrimethylammonium chloride (CTMA). The resulting DNA-lipid complex shows good solubility in alcohol, which allows the fabrication of thin films for studying the photophysical properties of DNA in a solid state. The absorption and photoluminescence (PL) behaviors of CTMA-DNA and polymethylmethacrylate (PMMA) doped with (E)-2-(2-(4-(diethylamino)styryl)-4H-pyran-4-ylidene)malononitrile (DCM) were investigated. In addition, different PL spectral behaviors with differing concentrations of DCM in two different host materials were observed. These behaviors were explained by a mechanism based on intercalation or groove binding of fluorescent dye into the base pairs or aliphatic side-chain moieties of CTMA-DNA.

Original languageEnglish
Pages (from-to)5417-5423
Number of pages7
Issue number25
Publication statusPublished - 2008 Nov 24

Bibliographical note

Funding Information:
This work was supported by NBIT program (K2070200068808A040001710, KICOS, MOST and AFOSR, 2007–2008).


  • Natural DNA
  • PMMA

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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