Synergism in Multicomponent Self-Propagating Molecular Assemblies
Multicomponent self-propagating molecular assemblies (SPMAs) have been generated from an organic chromophore, a redox-active polypyridyl complex, and PdCl{sub 2}. The structure of the multicomponent SPMA is not a linear combination of two assemblies generated with a single molecular constituent. Surface-confined assemblies formed from only the organic chromophore and PdCl{sub 2} are known to follow linear growth, whereas the combination of polypyridyl complexes and PdCl{sub 2} results in exponential growth. The present study demonstrates that an iterative deposition of both molecular building blocks with PdCl{sub 2} results in an exponentially growing assembly. The nature of the assembly mechanism is dictated by the polypyridyl complex and overrides the linear growth process of the organic component. Relatively smooth, multicomponent SPMAs have been obtained with a thickness of {approx}20 nm on silicon, glass, and indium-tin oxide (ITO) coated glass. Detailed information of the structure and of the surface-assembly chemistry were obtained using transmission optical (UV/Vis) spectroscopy, ellipsometry, atomic force microscopy (AFM), synchrotron X-ray reflectivity (XRR), and electrochemistry.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1041713
- Report Number(s):
- BNL-97391-2012-JA; LANGD5; TRN: US201212%%125
- Journal Information:
- Langmuir, Vol. 27, Issue 4; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stepwise Assembly of Coordination-Based Metal-Organic Networks
Self-assembly molecular squares with metal complexes as bridging ligands