TY - JOUR
T1 - Intermolecular charge transfer in Langmuir-Blodgett films
T2 - Formation of mixed and alternate-layer LB films of quinhydrone and TTF-TCNQ derivatives
AU - Akutagawa, Tomoyuki
AU - Konuma, Taro
AU - Nakamura, Takayoshi
N1 - Funding Information:
This paper is dedicated to Professor Yusei Maruyama on the occasion of his retirement from Institute for Molecular Science in recognition of his outstanding achievements as a scientist. This work was partly supported by the Grant-in-Aid for Science Research from the Ministry of Education, Science, Sports and Culture. One of the authors (T. N.) gratefully acknowledges support of the Murata Science Foundation.
PY - 1997
Y1 - 1997
N2 - Intra- and interlayer charge transfer properties were examined in the mixed and the alternate-layer Langmuir-Blodgett (LB) films of 2-methyl-5-octadecyl-1,4-dihydroxybenzene (C18HQ) and 2-methyl-5-octadecyl-1,4-benzoquinone (C18Q), which is an example of the "neutral" charge transfer complex, and 2-hexadecyl-3-heptadecyl-6,7-dimethyltetrathiafulvalene (C16C17DMTTF) and 2-octadecyl-7,7,8,8-tetracyanoquinodimethane (C18TCNQ) for the "ionic" complex. In the former case, intermolecular charge transfer took place in both types of LB films. The charge transfer band between C18HQ and C18Q appeared at 590 nm even for the bilayer film. The charge transferred state should be accompanied by hydrogen bonding, although the IR spectra revealed that a certain amount of non-hydrogen bonded C=O group exists in the film. The 1:1 mixture of C16C17DMTTF and C18TCNQ gave an ionic charge transfer complex in the form of mixed LB films. UV-visible and IR spectra revealed the strong complex formation during the film-forming process. On the other hand, the charge transfer interaction between the adjacent layer of the interleaved LB films essentially did not take place.
AB - Intra- and interlayer charge transfer properties were examined in the mixed and the alternate-layer Langmuir-Blodgett (LB) films of 2-methyl-5-octadecyl-1,4-dihydroxybenzene (C18HQ) and 2-methyl-5-octadecyl-1,4-benzoquinone (C18Q), which is an example of the "neutral" charge transfer complex, and 2-hexadecyl-3-heptadecyl-6,7-dimethyltetrathiafulvalene (C16C17DMTTF) and 2-octadecyl-7,7,8,8-tetracyanoquinodimethane (C18TCNQ) for the "ionic" complex. In the former case, intermolecular charge transfer took place in both types of LB films. The charge transfer band between C18HQ and C18Q appeared at 590 nm even for the bilayer film. The charge transferred state should be accompanied by hydrogen bonding, although the IR spectra revealed that a certain amount of non-hydrogen bonded C=O group exists in the film. The 1:1 mixture of C16C17DMTTF and C18TCNQ gave an ionic charge transfer complex in the form of mixed LB films. UV-visible and IR spectra revealed the strong complex formation during the film-forming process. On the other hand, the charge transfer interaction between the adjacent layer of the interleaved LB films essentially did not take place.
KW - Alternate-layer LB films
KW - Charge transfer complex
KW - Langmuir-Blodgett films
KW - Quinhydrones
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U2 - 10.1080/10587259708032335
DO - 10.1080/10587259708032335
M3 - Article
AN - SCOPUS:0031348378
VL - 296
SP - 383
EP - 395
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
SN - 1542-1406
ER -