Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
권호 표지
DOI QR코드

DOI QR Code

Influence of pH and Dye Concentration on the Physical Properties and Microstructure of New Coumarin 4 Doped SiO2-PDMS ORMOSIL

  • Oh, E.O. (School of Materials Science and Engineering, and Institute of Advanced Materials,Inha University) ;
  • Gupta, R.K. (School of Materials Science and Engineering, and Institute of Advanced Materials,Inha University) ;
  • Cho, N.H. (School of Materials Science and Engineering, and Institute of Advanced Materials,Inha University) ;
  • Yoo, Y.C. (School of Materials Science and Engineering, and Institute of Advanced Materials,Inha University) ;
  • Cho, W.S. (School of Materials Science and Engineering, and Institute of Advanced Materials,Inha University) ;
  • Whang, C.M. (School of Materials Science and Engineering, and Institute of Advanced Materials,Inha University)
  • Published : 2003.03.20
Download PDF
⟨ Previous Next ⟩

Abstract

Physical properties and microstructure of new coumarin 4 doped $SiO_2$-PDMS ORMOSILs, synthesized by one-step (OS, acid-catalysis) and two-step (TS, acid-base catalysis) routes of sol-gel method with varying pH (0.6 to 7) and dye content $(5\;{times}\;10^{-4}\;to\;5{\times}\;10^{-2}\;mole)$, are reported. BET, UV-visible spectroscopy and SEM were used for characterizations. The increase in acid or base concentration increased the size of pores and aggregated silica particles. The samples with pH ≤ 2.5 were transparent and attributed to the small size of pores (~20 Å) and silica particles. The samples with pH > 2.5 were translucent or opaque due to non-uniform pore system formed by voids and large aggregated silica particles. The surface area was found a key factor controlling the interactions between the gel matrix and the dye. The OS samples with the highest dye concentration exhibited the minimal values of pore size, surface area and silica particle size, resulting in the concentration-quenching phenomenon.

Keywords

References

  1. Dunn, B.; Zink, J. I. J. Mater. Chem. 1991, 1, 903. https://doi.org/10.1039/jm9910100903
  2. Wojcik, A. B.; Klein, L. C. Applied Organometal. Chem. 1997, 11, 129. https://doi.org/10.1002/(SICI)1099-0739(199702)11:2<129::AID-AOC559>3.0.CO;2-0
  3. Mackenzie, J. D.; Bescher, E. P. J. Sol-Gel Sci. Tech. 1998, 13, 371. https://doi.org/10.1023/A:1008600723220
  4. Lin, H. T.; Bescher, E. P.; Mackenzie, J. D.; Dai, H.; Stafsudd, O. M. J. Mater. Sci. 1992, 27, 5523. https://doi.org/10.1007/BF00541615
  5. Krihak, M.; Shahriari, M. R. Optical Mater. 1996, 5, 301. https://doi.org/10.1016/0925-3467(95)00071-2
  6. Kim, G. D.; Lee, D. A.; Kim, J. D.; Moon, J. W.; Lee, H. L. J. Sol-Gel Sci. Tech. 1997, 10, 283. https://doi.org/10.1023/A:1018373301191
  7. Suratwala, T.; Gardlund, Z.; Davidson, K.; Uhlmann, D. R.; Bonilla, S.; Peyghanmbarian, N. J. Sol-Gel Sci. Tech. 1997, 8, 953.
  8. Suratwala, T.; Gardlund, Z.; Davidson, K.; Uhlmann, D. R.; Bonilla, S.; Peyghanmbarian, N. J. Sol-Gel Sci. Tech. 1997, 8, 973.
  9. Suratwala, T.; Gardlund, Z.; Davidson, K.; Uhlmann, D. R.; Watson, J.; Bonilla, S.; Peyghambarian, N. Chem. Mater. 1998, 10, 199. https://doi.org/10.1021/cm970340s
  10. Yan, Y.; Duan, Z.; Dhen, D.; Ray Chaudhuri, S. Mat. Res. Soc. Symp. Proc. 1998, 519, 103.
  11. Qian, G.; Yang, Z.; Yang, C.; Wang, M. J. Appl. Phys. 2000, 88, 2503. https://doi.org/10.1063/1.1287120
  12. Laczka, M.; Kowalska, K. C.; Kogut, M. J. Non-Cryst. Solids 2001, 287, 10. https://doi.org/10.1016/S0022-3093(01)00532-4
  13. Oh, E. O.; Chakrabarti, K.; Jung, H. Y.; Whang, C. M. Mater. Sci. Eng. B 2002, 90, 60. https://doi.org/10.1016/S0921-5107(01)00825-X
  14. Kim, S. M.; Chakrabarti, K.; Oh, E. O.; Whang, C. M. J. Sol-Gel Sci. Tech. 2003 (in press).
  15. Oh, E. O.; Gupta, R. K.; Whang, C. M. J. Sol-Gel Sci. Tech. (Submitted).
  16. Brinker, C. J. J. Non-Cryst. Solids 1988, 100, 31. https://doi.org/10.1016/0022-3093(88)90005-1
  17. Boonstra, A. H.; Bernards, T. N. M. J. Non-Cryst. Solids 1988, 105, 207. https://doi.org/10.1016/0022-3093(88)90309-2
  18. Meyers, D. E.; Kirkbir, F.; Murata, H.; Ray Chaudhuri, S.; Sarkar, A. Mater. Res. Soc. Symp. 1990, 180, 439.
  19. Klein, L. C.; Garvey, G. J. Mater. Res. Soc. Symp. 1984, 32, 33.
  20. Curran, M. D.; Stiegman, A. E. J. Non-Cryst. Solids 1999, 249, 62. https://doi.org/10.1016/S0022-3093(99)00237-9
  21. Bryans, T. R.; Brawner, V. L.; Quitevis, E. L. J. Sol-Gel Sci. Tech. 2000, 17, 211. https://doi.org/10.1023/A:1008711921746
  22. Ying, J. Y.; Benziger, J. B.; Navrotsky, A. J. Am. Ceram. Soc. 1993, 76, 2571. https://doi.org/10.1111/j.1151-2916.1993.tb03983.x