A Direct Comparison of the Aggregation Behavior of Phthalocyanines and 2,3-Naphthalocyanines
作者:Michael T.M. Choi、Pearl P.S. Li、Dennis K.P. Ng
DOI:10.1016/s0040-4020(00)00326-4
日期:2000.6
Two pairs of analogous zinc(II) phthalocyanines and 2,3-naphthalocyanines with eight butylthio or 3,6-dioxa-1-decylthio substituents have been synthesized and shown to exhibit a substantial aggregation tendency in organic solvents. The visible spectra of the octakis(3,6-dioxa-1-decylthio) naphthalocyanine 7 have been recorded in THF with different concentrations and the data have been analyzed using a nonlinear least-squares fitting procedure giving epsilon(m) (777 nm), epsilon(d) (777 nm), and K-d at 1.95x10(6) M-1 cm(-1), 1.29x10(5) M-1 cm(-1), and 2.72x10(5) M-1, respectively. Simulated visible spectra for the pure monomeric and dimeric 7 have also been obtained. By variable-concentration and variable-temperature visible spectroscopic studies, the heats of aggregation of all these macrocycles in toluene have also been determined (-17.1 to - 105.0 kJ mol). These values depend largely on the additional interactions due to the substituents. (C) 2000 Elsevier Science Ltd. All rights reserved.
DE2848656
申请人:——
公开号:——
公开(公告)日:——
Rewritable optical information recording medium, recording and reproducing methods, as well as recording and reproducing apparatus
申请人:Tamada Sakuya
公开号:US20060088786A1
公开(公告)日:2006-04-27
A rewritable optical information recording medium including a recording layer composed of an organic dye film is provided, in which recording and erasing information can be performed reversibly by laser light irradiation. A rewritable optical information recording medium including at least one organic dye film which is substantially made of only at least one kind of organic dye compounds as a recording film is provided. The recording and erasure of information are performed by a reversible physical change of the organic dye film substance caused by laser light irradiation. Specifically, data recording is performed by a physical change locally caused by the irradiation of recording laser light, data reproduction is performed by detecting change in intensity of returned light of reproducing laser light having less power than the recording laser light, and data erasure is performed by applying at least once continuous light or pulse light having laser power more than the reproducing laser light and less than the recording laser light. The physical change is a change in shape.
US5516945A
申请人:——
公开号:US5516945A
公开(公告)日:1996-05-14
Prill; Hartzell; Arthur, Contributions from Boyce Thompson Institute, 1946, vol. 14, p. 130