ICCAS OpenIR
Langmuir-Schaefer films of a set of achiral amphiphilic porphyrins: aggregation and supramolecular chirality
Wang, Tianyu; Liu, Minghua
2008
Source PublicationSOFT MATTER
ISSN1744-683X
Volume4Issue:4Pages:775-783
AbstractA series of new achiral porphyrins with hydrophobic dodecyl chains and hydrophilic substituents were designed in order to clarify the relationship between molecular geometry and aggregation as well as the supramolecular chirality in Langmuir-Schaefer films. These achiral porphyrins have zero (TPPA0), one (TPPA1), two (TPPA2a, TPPA2b), three (TPPA3) and four (TPPA4) long hydrophobic chains, respectively. Most of the compounds showed good spreading behaviour on a water surface except TPPA4 and could be fabricated into LS films easily. Depending on the number of alkyl chains, the porphyrin derivatives showed different aggregation behaviour in the LS films. The transferred films were characterized by UV-vis, circular dichroism (CD) and FTIR spectroscopy, and atomic force microscopy (AFM). Interestingly, some of the porphyrin assemblies were found to be optically active in the LS films although the compounds themselves are achiral. TPPA3 showed a strong Cotton effect in the LS film and fiber-like morphology on mica surface. Weak supramolecular chirality was detected from the LS films of TPPA0, TPPA1 and TPPA4, but no Cotton effect was observed for the LS films of TPPA2a or TPPA2b. On the other hand, when the LS film of TPPA3 was dipped into hexane or exposed to HCl gas, which altered the hydrophobic effect among the dodecyl chains and destroyed the pi-pi interactions between the porphyrin macrocyclic rings, the CD signal decreased or disappeared. The different aggregation behaviour and supramolecular chirality in the films was suggested to be related to the molecular structure and subsequent packing in their organized molecular films.
DOI10.1039/b718146a
Indexed BySCI
Language英语
WOS IDWOS:000254386800018
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/65672
Collection中国科学院化学研究所
Corresponding AuthorWang, Tianyu
AffiliationChinese Acad Sci, Inst Chem, CAS Key Lab Colloid Interface & Chem Thermodynam, BNLMS, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wang, Tianyu,Liu, Minghua. Langmuir-Schaefer films of a set of achiral amphiphilic porphyrins: aggregation and supramolecular chirality[J]. SOFT MATTER,2008,4(4):775-783.
APA Wang, Tianyu,&Liu, Minghua.(2008).Langmuir-Schaefer films of a set of achiral amphiphilic porphyrins: aggregation and supramolecular chirality.SOFT MATTER,4(4),775-783.
MLA Wang, Tianyu,et al."Langmuir-Schaefer films of a set of achiral amphiphilic porphyrins: aggregation and supramolecular chirality".SOFT MATTER 4.4(2008):775-783.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, Tianyu]'s Articles
[Liu, Minghua]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Tianyu]'s Articles
[Liu, Minghua]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Tianyu]'s Articles
[Liu, Minghua]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.