2008 年 33 巻 1 号 p. 95-98
We report the restoration of J-band in the merocyanine (MS)-containing LB films induced by the repeated application of heat treatments; a dry-heat treatment (DHT) followed by hydrothermal treatments under 100% humidity (HTTs) (i.e., DHT - NxHTT) together with the dissociation of the as-deposited J-band induced by DHTs. The law of additivity is found to roughly hold among the total heating in the NxDHT process, during which a fraction of MS molecules is subjected to degradation. In the process of DHT - NxHTT, the J-band component, once totally dissociated by DHT, is restored by NxHTT. The occurrence and growth of the restored J-band, and the change in film texture are found to be identifiable with those seen in the second-stage when HTT is directly applied to the as-deposited film. It is shown that HTT is feasible as another means to restore the J-band in the DHT-induced red films with lesser risk of degradation than the so far known basic treatments (ATs) in vapor and liquid phases that may be associated with unfavorable chemical reactions.
