Document Detail

Size Does Matter: How to Control Organization of Organic Dyes in Aqueous Environment using Specific Ion Effects.
MedLine Citation:
PMID:  23145855     Owner:  NLM     Status:  Publisher    
Understanding the role played by external factors on the organization of molecules has the potential to contribute greatly to fundamental research and applications of fields as diverse as nanotechnology, medicine, material chemistry, etc. Countless studies involve the organization of small organic molecules in environments rich in ionic species, yet their participation in molecular organization is often overlooked at. Herein, we critically assess the organization in aqueous solution of the cationic cyanine dye, thiazole orange, in the presence of different monovalent sodium salts. Our findings clearly indicate that not all ions are identical with regards to the organization of the thiazole orange molecule and specific ions effects are at play. The conventional Debye and Hückel model is not sufficient to explain our results and the participation of ionic species in molecular organization is explained in term of the recent theory of water matching affinity. Herein, by choosing the right counter ion with the appropriate size, we have shown it is possible to either induce a simple shift in the monomer-dimer equilibrium of thiazole orange, or to turn on the formation of larger organized structures.
Sara M Mooi; Belinda Heyne
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-12
Journal Detail:
Title:  Langmuir : the ACS journal of surfaces and colloids     Volume:  -     ISSN:  1520-5827     ISO Abbreviation:  Langmuir     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882736     Medline TA:  Langmuir     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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