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Titolo:
ORIENTATION CONTROL OF FUNCTIONAL MOLECULES IN LANGMUIR-BLODGETT-FILMS USING A TRIGGER MOLECULE - THE EFFECT OF SUBSTITUTION OF THE FUNCTIONAL MOLECULE
Autore:
AZUMI R; TANAKA M; MATSUMOTO M; KURODA S; SUGI M; LE TH; CROSSLEY MJ;
Indirizzi:
NATL INST MAT & CHEM RES TSUKUBA IBARAKI 305 JAPAN ELECTROTECH LAB TSUKUBA IBARAKI 305 JAPAN UNIV SYDNEY SYDNEY NSW 2006 AUSTRALIA
Titolo Testata:
Thin solid films
fascicolo: 1-2, volume: 242, anno: 1994,
pagine: 300 - 303
SICI:
0040-6090(1994)242:1-2<300:OCOFMI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESONANCE; ESR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
R. Azumi et al., "ORIENTATION CONTROL OF FUNCTIONAL MOLECULES IN LANGMUIR-BLODGETT-FILMS USING A TRIGGER MOLECULE - THE EFFECT OF SUBSTITUTION OF THE FUNCTIONAL MOLECULE", Thin solid films, 242(1-2), 1994, pp. 300-303

Abstract

This paper reports the effect of the substitution of porphyrin molecule on its orientation change in a Langmuir-Blodgett (LB) film using a long-chain n-alkane, hexatriacontane. Electron spin resonance spectra and polarized UV/vis absorption spectra of the LB films containing derivatives with -S(C6H5), -SO(C6H5), -OH and -NHCOCH3 groups suggest that the orientation as well as the aggregation of these derivatives in the LB film can be changed by the introduction of hexatriacontane as a trigger molecule, in a similar manner to that observed for the unsubstituted porphyrin. The macrocycle plane of these derivatives tilts withrespect to the surface normal of the LB film without hexatriacontane,whereas the macrocycle is almost perpendicular to the film surface inthe presence of hexatriacontane. In contrast, the orientation of the derivative with carboxylic acid, -NHCO(CH2)2COOH, was not affected by the presence of hexatriacontane. Furthermore, in-plane anisotropy was observed in the UV/vis and ESR spectra for the LB films of this derivative, and was not observed in those for the unsubstituted porphyrin orthe other derivatives.

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Documento generato il 18/09/20 alle ore 20:09:51