- P-ISSN 1225-0163
- E-ISSN 2288-8985
- P-ISSN1225-0163
- E-ISSN2288-8985
- SCOPUS, ESCI, KCI
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Surface-Enhanced Raman Spectroscopic Studies of Oriented Monolayers on Electrode Surfaces
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1995, v.8 no.4, pp.699-705
Yoon,
W., Im,
J., &
Kim,
J.
(1995). Surface-Enhanced Raman Spectroscopic Studies of Oriented Monolayers on Electrode Surfaces. , 8(4), 699-705.
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Abstract
Monolayers of hypericin, a photodynamic polycyclic quinoidal compound, were prepared at the air-water interface, and were transferred to metal substrates to form Langmuir-Blodgett (LB) monolayers. The structural characteristics of hypericin LB monolayers and self-assembled (SA) monolayers were investigated using surface-enhanced resonance Raman scattering (SERRS) spectroscopy. Both the spectroscopic data and the surface pressure - area (<TEX>${\pi}-A$</TEX>) isotherms suggest that hypericin forms <TEX>${\pi}-{\pi}$</TEX> aggregates that orient vertically to the subphase surface. Whereas the ordering and orientation of control was less effective in SA monolayers, a higher structural regularity was attained in LB systems. The effect of subphase on the structural integrity of the monolayer was also investigated.
- keywords
- surface-enhanced Raman spectroscopy, Langmuir-Blodgett, self-assembly monolayer, hypericin
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