Document Detail

STM study on 2D molecular assemblies of luminescent quinacridone derivatives: structure fine-tuned by introducing bulky substitutes and co-adsorption with monofunctional/bifunctional acid.
MedLine Citation:
PMID:  17241047     Owner:  NLM     Status:  PubMed-not-MEDLINE    
We describe the 2D assemblies of a series of N,N'-dialkyl-substituted quinacridone derivatives on highly oriented pyrolytic graphite observed by scanning tunneling microscopy. Our experiments have demonstrated that pure quinacridone derivatives take contractive conformations, but quinacridone derivatives take extended conformations when co-adsorbed with dicarboxylic acid. Interestingly, by co-adsorption with monofunctional acid stearic acid, quinacridone derivative bearing two smaller substituted groups of trifluoromethyl takes an extended conformation, while quinacridone derivative bearing two larger substituted groups of tert-butyl still takes a contractive conformation. Therefore, the 2D structure of the quinacridone derivatives can be fine-tuned by co-adsorbing with monofunctional/bifunctional acid through hydrogen bonds.
Xunyu Yang; Jia Wang; Xi Zhang; Zhiqiang Wang; Yue Wang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  23     ISSN:  0743-7463     ISO Abbreviation:  Langmuir     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2007-01-23     Completed Date:  2007-02-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1287-91     Citation Subset:  -    
Key Lab of Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.
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